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/loop-new/gauss_sum.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:02:10,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:02:10,285 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:02:10,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-03 20:02:10,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 20:02:10,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 20:02:10,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 20:02:10,377 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 [2019-09-03 20:02:10,401 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:02:10,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:02:10,404 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 20:02:10,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 20:02:10,405 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 20:02:10,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:02:10,405 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:02:10,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 20:02:10,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:02:10,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:02:10,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:02:10,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:02:10,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:02:10,408 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:02:10,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:02:10,408 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 20:02:10,409 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:02:10,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:02:10,409 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:02:10,409 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 20:02:10,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 20:02:10,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:02:10,410 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:02:10,410 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:02:10,410 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 20:02:10,411 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 20:02:10,411 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:02:10,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:02:10,411 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 20:02:10,459 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:02:10,476 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:02:10,481 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:02:10,482 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:02:10,483 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:02:10,484 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i [2019-09-03 20:02:10,556 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ce6259fa/a6ddbad214634904ba04c1288234fee7/FLAG246ca97b8 [2019-09-03 20:02:10,990 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:02:10,991 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i [2019-09-03 20:02:10,997 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ce6259fa/a6ddbad214634904ba04c1288234fee7/FLAG246ca97b8 [2019-09-03 20:02:11,418 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ce6259fa/a6ddbad214634904ba04c1288234fee7 [2019-09-03 20:02:11,428 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:02:11,429 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:02:11,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:02:11,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:02:11,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:02:11,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:02:11" (1/1) ... [2019-09-03 20:02:11,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@df2ebab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:02:11, skipping insertion in model container [2019-09-03 20:02:11,438 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:02:11" (1/1) ... [2019-09-03 20:02:11,446 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:02:11,466 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:02:11,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:02:11,622 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:02:11,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:02:11,647 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:02:11,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:02:11 WrapperNode [2019-09-03 20:02:11,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:02:11,649 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:02:11,649 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:02:11,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:02:11,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:02:11" (1/1) ... [2019-09-03 20:02:11,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:02:11" (1/1) ... [2019-09-03 20:02:11,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:02:11" (1/1) ... [2019-09-03 20:02:11,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:02:11" (1/1) ... [2019-09-03 20:02:11,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:02:11" (1/1) ... [2019-09-03 20:02:11,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:02:11" (1/1) ... [2019-09-03 20:02:11,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:02:11" (1/1) ... [2019-09-03 20:02:11,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:02:11,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:02:11,765 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:02:11,765 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:02:11,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:02:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:02:11,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:02:11,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:02:11,816 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 20:02:11,817 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:02:11,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:02:11,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 20:02:11,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:02:11,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 20:02:11,817 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:02:11,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:02:11,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:02:11,976 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:02:11,977 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 20:02:11,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:02:11 BoogieIcfgContainer [2019-09-03 20:02:11,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:02:11,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:02:11,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:02:11,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:02:11,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:02:11" (1/3) ... [2019-09-03 20:02:11,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@569ea5ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:02:11, skipping insertion in model container [2019-09-03 20:02:11,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:02:11" (2/3) ... [2019-09-03 20:02:11,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@569ea5ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:02:11, skipping insertion in model container [2019-09-03 20:02:11,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:02:11" (3/3) ... [2019-09-03 20:02:11,986 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i [2019-09-03 20:02:11,995 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:02:12,003 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:02:12,021 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:02:12,088 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 20:02:12,089 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:02:12,089 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 20:02:12,090 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:02:12,090 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:02:12,090 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:02:12,090 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:02:12,090 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:02:12,090 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:02:12,111 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-09-03 20:02:12,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-03 20:02:12,118 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:12,119 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:12,122 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:12,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:12,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1281911547, now seen corresponding path program 1 times [2019-09-03 20:02:12,130 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:12,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:12,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:12,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:02:12,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:02:12,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:12,238 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:02:12,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 20:02:12,241 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 20:02:12,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 20:02:12,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:02:12,254 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-09-03 20:02:12,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:12,272 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-09-03 20:02:12,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 20:02:12,274 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-09-03 20:02:12,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:12,282 INFO L225 Difference]: With dead ends: 32 [2019-09-03 20:02:12,282 INFO L226 Difference]: Without dead ends: 13 [2019-09-03 20:02:12,285 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 [2019-09-03 20:02:12,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-03 20:02:12,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-03 20:02:12,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-03 20:02:12,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-03 20:02:12,317 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-03 20:02:12,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:12,318 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-03 20:02:12,318 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 20:02:12,318 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-03 20:02:12,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-03 20:02:12,319 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:12,319 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:12,319 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:12,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:12,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1287452673, now seen corresponding path program 1 times [2019-09-03 20:02:12,321 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:12,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:12,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:12,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:02:12,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:12,329 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:12,329 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:12,330 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) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:12,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:02:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:02:12,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-03 20:02:12,379 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:12,422 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:02:12,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-03 20:02:12,425 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-03 20:02:12,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-03 20:02:12,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 20:02:12,426 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 3 states. [2019-09-03 20:02:12,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:12,447 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-09-03 20:02:12,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-03 20:02:12,448 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-09-03 20:02:12,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:12,449 INFO L225 Difference]: With dead ends: 20 [2019-09-03 20:02:12,449 INFO L226 Difference]: Without dead ends: 15 [2019-09-03 20:02:12,450 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 [2019-09-03 20:02:12,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-03 20:02:12,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-09-03 20:02:12,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-03 20:02:12,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-03 20:02:12,455 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2019-09-03 20:02:12,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:12,456 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-03 20:02:12,456 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-03 20:02:12,456 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-03 20:02:12,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-03 20:02:12,456 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:12,457 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:12,457 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:12,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:12,457 INFO L82 PathProgramCache]: Analyzing trace with hash 843923389, now seen corresponding path program 1 times [2019-09-03 20:02:12,458 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:12,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:12,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:12,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:02:12,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:12,468 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:12,469 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:12,469 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 [2019-09-03 20:02:12,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:02:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:02:12,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-03 20:02:12,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:12,617 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:12,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:12,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-03 20:02:12,661 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 20:02:12,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 20:02:12,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:02:12,663 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 8 states. [2019-09-03 20:02:12,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:12,775 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-09-03 20:02:12,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 20:02:12,776 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-09-03 20:02:12,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:12,779 INFO L225 Difference]: With dead ends: 21 [2019-09-03 20:02:12,779 INFO L226 Difference]: Without dead ends: 16 [2019-09-03 20:02:12,780 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:02:12,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-03 20:02:12,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-03 20:02:12,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-03 20:02:12,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-09-03 20:02:12,787 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2019-09-03 20:02:12,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:12,788 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-09-03 20:02:12,788 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 20:02:12,788 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-09-03 20:02:12,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-03 20:02:12,789 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:12,789 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:12,790 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:12,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:12,790 INFO L82 PathProgramCache]: Analyzing trace with hash 396918779, now seen corresponding path program 2 times [2019-09-03 20:02:12,790 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:12,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:12,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:12,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:02:12,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:12,811 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:12,811 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:12,811 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) [2019-09-03 20:02:12,828 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:12,852 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:02:12,852 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:12,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-03 20:02:12,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:12,984 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:13,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:13,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-03 20:02:13,026 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:02:13,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:02:13,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:02:13,027 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 10 states. [2019-09-03 20:02:13,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:13,153 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-09-03 20:02:13,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 20:02:13,154 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-09-03 20:02:13,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:13,155 INFO L225 Difference]: With dead ends: 23 [2019-09-03 20:02:13,155 INFO L226 Difference]: Without dead ends: 18 [2019-09-03 20:02:13,156 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-09-03 20:02:13,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-03 20:02:13,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-03 20:02:13,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-03 20:02:13,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-09-03 20:02:13,161 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2019-09-03 20:02:13,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:13,161 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-09-03 20:02:13,161 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:02:13,162 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-09-03 20:02:13,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-03 20:02:13,162 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:13,163 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:13,165 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:13,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:13,166 INFO L82 PathProgramCache]: Analyzing trace with hash 322218169, now seen corresponding path program 3 times [2019-09-03 20:02:13,166 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:13,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:13,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:13,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:13,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:13,179 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:13,182 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:13,182 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:02:13,215 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:13,232 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-03 20:02:13,232 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:13,233 WARN L254 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-03 20:02:13,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:13,382 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:13,424 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:13,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-09-03 20:02:13,425 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-03 20:02:13,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-03 20:02:13,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-09-03 20:02:13,427 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 12 states. [2019-09-03 20:02:13,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:13,604 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-09-03 20:02:13,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-03 20:02:13,606 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-09-03 20:02:13,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:13,607 INFO L225 Difference]: With dead ends: 25 [2019-09-03 20:02:13,607 INFO L226 Difference]: Without dead ends: 20 [2019-09-03 20:02:13,608 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:02:13,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-09-03 20:02:13,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-09-03 20:02:13,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-03 20:02:13,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-09-03 20:02:13,615 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2019-09-03 20:02:13,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:13,616 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-09-03 20:02:13,616 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-03 20:02:13,616 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-09-03 20:02:13,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-03 20:02:13,618 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:13,619 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:13,619 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:13,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:13,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1549375991, now seen corresponding path program 4 times [2019-09-03 20:02:13,620 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:13,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:13,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:13,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:13,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:13,644 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:13,644 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:13,645 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) [2019-09-03 20:02:13,667 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:13,683 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:02:13,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:13,685 WARN L254 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-03 20:02:13,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:13,831 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:13,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:13,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-03 20:02:13,873 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-03 20:02:13,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-03 20:02:13,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:02:13,875 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 14 states. [2019-09-03 20:02:14,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:14,054 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-09-03 20:02:14,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-03 20:02:14,055 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-09-03 20:02:14,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:14,056 INFO L225 Difference]: With dead ends: 27 [2019-09-03 20:02:14,056 INFO L226 Difference]: Without dead ends: 22 [2019-09-03 20:02:14,057 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2019-09-03 20:02:14,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-03 20:02:14,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-09-03 20:02:14,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-03 20:02:14,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-09-03 20:02:14,063 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2019-09-03 20:02:14,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:14,063 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-09-03 20:02:14,063 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-03 20:02:14,063 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-09-03 20:02:14,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-03 20:02:14,064 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:14,064 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:14,064 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:14,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:14,065 INFO L82 PathProgramCache]: Analyzing trace with hash -267963467, now seen corresponding path program 5 times [2019-09-03 20:02:14,065 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:14,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:14,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:14,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:14,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:14,074 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:14,074 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:14,074 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:14,094 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:02:14,108 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-03 20:02:14,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:14,110 WARN L254 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-03 20:02:14,112 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:14,298 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:14,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:14,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-09-03 20:02:14,337 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-03 20:02:14,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-03 20:02:14,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2019-09-03 20:02:14,338 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 16 states. [2019-09-03 20:02:14,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:14,548 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-09-03 20:02:14,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-03 20:02:14,548 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2019-09-03 20:02:14,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:14,549 INFO L225 Difference]: With dead ends: 29 [2019-09-03 20:02:14,549 INFO L226 Difference]: Without dead ends: 24 [2019-09-03 20:02:14,550 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2019-09-03 20:02:14,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-03 20:02:14,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-03 20:02:14,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-03 20:02:14,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-09-03 20:02:14,555 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2019-09-03 20:02:14,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:14,555 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-09-03 20:02:14,555 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-03 20:02:14,555 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-09-03 20:02:14,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-03 20:02:14,556 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:14,556 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:14,557 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:14,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:14,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1320506867, now seen corresponding path program 6 times [2019-09-03 20:02:14,557 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:14,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:14,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:14,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:14,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:14,566 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:14,566 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:14,566 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 [2019-09-03 20:02:14,583 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:02:14,604 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-03 20:02:14,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:14,605 WARN L254 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-03 20:02:14,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:14,810 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:14,853 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:14,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-03 20:02:14,854 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-03 20:02:14,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-03 20:02:14,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2019-09-03 20:02:14,855 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 18 states. [2019-09-03 20:02:15,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:15,085 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-09-03 20:02:15,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-03 20:02:15,085 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 23 [2019-09-03 20:02:15,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:15,086 INFO L225 Difference]: With dead ends: 31 [2019-09-03 20:02:15,087 INFO L226 Difference]: Without dead ends: 26 [2019-09-03 20:02:15,088 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2019-09-03 20:02:15,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-03 20:02:15,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-09-03 20:02:15,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-03 20:02:15,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-09-03 20:02:15,093 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2019-09-03 20:02:15,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:15,094 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-09-03 20:02:15,094 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-03 20:02:15,094 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-09-03 20:02:15,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-03 20:02:15,095 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:15,095 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:15,095 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:15,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:15,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1167859535, now seen corresponding path program 7 times [2019-09-03 20:02:15,095 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:15,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:15,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:15,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:15,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:15,104 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:15,104 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:15,104 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) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:15,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:02:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:02:15,133 WARN L254 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 39 conjunts are in the unsatisfiable core [2019-09-03 20:02:15,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:15,384 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:15,431 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:15,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-09-03 20:02:15,433 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-03 20:02:15,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-03 20:02:15,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2019-09-03 20:02:15,435 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 20 states. [2019-09-03 20:02:15,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:15,717 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-09-03 20:02:15,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-03 20:02:15,717 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 25 [2019-09-03 20:02:15,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:15,718 INFO L225 Difference]: With dead ends: 33 [2019-09-03 20:02:15,718 INFO L226 Difference]: Without dead ends: 28 [2019-09-03 20:02:15,719 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2019-09-03 20:02:15,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-03 20:02:15,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-03 20:02:15,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-03 20:02:15,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-09-03 20:02:15,724 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2019-09-03 20:02:15,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:15,724 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-09-03 20:02:15,724 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-03 20:02:15,724 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-09-03 20:02:15,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-03 20:02:15,725 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:15,725 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:15,725 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:15,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:15,725 INFO L82 PathProgramCache]: Analyzing trace with hash -191187985, now seen corresponding path program 8 times [2019-09-03 20:02:15,726 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:15,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:15,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:15,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:02:15,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:15,735 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:15,735 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:15,736 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 [2019-09-03 20:02:15,754 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:02:15,769 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:02:15,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:15,771 WARN L254 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 43 conjunts are in the unsatisfiable core [2019-09-03 20:02:15,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:16,040 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:16,096 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:16,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:16,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-09-03 20:02:16,100 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-03 20:02:16,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-03 20:02:16,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2019-09-03 20:02:16,102 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 22 states. [2019-09-03 20:02:16,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:16,422 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-09-03 20:02:16,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-03 20:02:16,423 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2019-09-03 20:02:16,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:16,424 INFO L225 Difference]: With dead ends: 35 [2019-09-03 20:02:16,424 INFO L226 Difference]: Without dead ends: 30 [2019-09-03 20:02:16,425 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2019-09-03 20:02:16,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-03 20:02:16,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-03 20:02:16,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-03 20:02:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-09-03 20:02:16,430 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2019-09-03 20:02:16,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:16,430 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-09-03 20:02:16,430 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-03 20:02:16,430 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-09-03 20:02:16,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-03 20:02:16,431 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:16,431 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:16,431 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:16,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:16,432 INFO L82 PathProgramCache]: Analyzing trace with hash 2087301037, now seen corresponding path program 9 times [2019-09-03 20:02:16,432 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:16,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:16,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:16,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:16,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:16,445 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:16,445 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:16,445 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) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:16,462 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:02:16,482 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-03 20:02:16,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:16,483 WARN L254 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 47 conjunts are in the unsatisfiable core [2019-09-03 20:02:16,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:16,802 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:16,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:16,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-03 20:02:16,846 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-03 20:02:16,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-03 20:02:16,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2019-09-03 20:02:16,846 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 24 states. [2019-09-03 20:02:17,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:17,248 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2019-09-03 20:02:17,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-03 20:02:17,249 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 29 [2019-09-03 20:02:17,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:17,250 INFO L225 Difference]: With dead ends: 37 [2019-09-03 20:02:17,250 INFO L226 Difference]: Without dead ends: 32 [2019-09-03 20:02:17,250 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2019-09-03 20:02:17,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-03 20:02:17,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-09-03 20:02:17,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-03 20:02:17,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-09-03 20:02:17,255 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2019-09-03 20:02:17,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:17,256 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-09-03 20:02:17,256 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-03 20:02:17,256 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-09-03 20:02:17,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-03 20:02:17,257 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:17,257 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:17,257 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:17,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:17,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1281930219, now seen corresponding path program 10 times [2019-09-03 20:02:17,258 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:17,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:17,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:17,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:17,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:17,271 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:17,271 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:17,271 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) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:17,283 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:02:17,296 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:02:17,296 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:17,297 WARN L254 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 51 conjunts are in the unsatisfiable core [2019-09-03 20:02:17,299 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:17,640 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:17,701 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:17,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:17,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-09-03 20:02:17,705 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-03 20:02:17,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-03 20:02:17,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2019-09-03 20:02:17,706 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 26 states. [2019-09-03 20:02:18,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:18,152 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-09-03 20:02:18,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-03 20:02:18,152 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 31 [2019-09-03 20:02:18,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:18,153 INFO L225 Difference]: With dead ends: 39 [2019-09-03 20:02:18,153 INFO L226 Difference]: Without dead ends: 34 [2019-09-03 20:02:18,154 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=698, Unknown=0, NotChecked=0, Total=756 [2019-09-03 20:02:18,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-03 20:02:18,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-09-03 20:02:18,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-03 20:02:18,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-09-03 20:02:18,161 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2019-09-03 20:02:18,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:18,161 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-09-03 20:02:18,161 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-03 20:02:18,161 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-09-03 20:02:18,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-09-03 20:02:18,162 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:18,162 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:18,163 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:18,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:18,163 INFO L82 PathProgramCache]: Analyzing trace with hash 414687401, now seen corresponding path program 11 times [2019-09-03 20:02:18,163 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:18,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:18,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:18,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:18,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:18,174 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:18,174 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:18,175 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 [2019-09-03 20:02:18,193 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:02:18,216 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-09-03 20:02:18,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:18,218 WARN L254 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 55 conjunts are in the unsatisfiable core [2019-09-03 20:02:18,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:18,627 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:18,676 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:18,679 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:18,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-09-03 20:02:18,681 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-03 20:02:18,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-03 20:02:18,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2019-09-03 20:02:18,683 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 28 states. [2019-09-03 20:02:19,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:19,201 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2019-09-03 20:02:19,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-03 20:02:19,201 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 33 [2019-09-03 20:02:19,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:19,202 INFO L225 Difference]: With dead ends: 41 [2019-09-03 20:02:19,202 INFO L226 Difference]: Without dead ends: 36 [2019-09-03 20:02:19,204 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=808, Unknown=0, NotChecked=0, Total=870 [2019-09-03 20:02:19,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-03 20:02:19,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-09-03 20:02:19,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-03 20:02:19,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-09-03 20:02:19,212 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2019-09-03 20:02:19,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:19,213 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-09-03 20:02:19,213 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-03 20:02:19,213 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-09-03 20:02:19,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-03 20:02:19,214 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:19,214 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:19,214 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:19,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:19,215 INFO L82 PathProgramCache]: Analyzing trace with hash 217994727, now seen corresponding path program 12 times [2019-09-03 20:02:19,215 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:19,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:19,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:19,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:19,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:19,239 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:19,239 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:19,239 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) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:19,255 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:02:19,280 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-03 20:02:19,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:19,282 WARN L254 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 59 conjunts are in the unsatisfiable core [2019-09-03 20:02:19,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:19,733 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:19,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:19,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-09-03 20:02:19,797 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-03 20:02:19,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-03 20:02:19,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2019-09-03 20:02:19,798 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 30 states. [2019-09-03 20:02:20,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:20,323 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-09-03 20:02:20,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-03 20:02:20,324 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 35 [2019-09-03 20:02:20,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:20,325 INFO L225 Difference]: With dead ends: 43 [2019-09-03 20:02:20,325 INFO L226 Difference]: Without dead ends: 38 [2019-09-03 20:02:20,326 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=926, Unknown=0, NotChecked=0, Total=992 [2019-09-03 20:02:20,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-03 20:02:20,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-09-03 20:02:20,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-03 20:02:20,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-09-03 20:02:20,336 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2019-09-03 20:02:20,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:20,336 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-09-03 20:02:20,336 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-03 20:02:20,336 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-09-03 20:02:20,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-03 20:02:20,340 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:20,340 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:20,341 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:20,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:20,341 INFO L82 PathProgramCache]: Analyzing trace with hash 174896037, now seen corresponding path program 13 times [2019-09-03 20:02:20,341 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:20,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:20,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:20,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:20,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:20,363 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:20,364 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:20,364 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) [2019-09-03 20:02:20,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:02:20,413 WARN L254 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 63 conjunts are in the unsatisfiable core [2019-09-03 20:02:20,418 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:20,946 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:21,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:21,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-09-03 20:02:21,010 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-03 20:02:21,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-03 20:02:21,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2019-09-03 20:02:21,011 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 32 states. [2019-09-03 20:02:21,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:21,642 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-09-03 20:02:21,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-03 20:02:21,643 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 37 [2019-09-03 20:02:21,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:21,643 INFO L225 Difference]: With dead ends: 45 [2019-09-03 20:02:21,644 INFO L226 Difference]: Without dead ends: 40 [2019-09-03 20:02:21,644 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=1052, Unknown=0, NotChecked=0, Total=1122 [2019-09-03 20:02:21,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-03 20:02:21,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-09-03 20:02:21,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-03 20:02:21,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-09-03 20:02:21,649 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2019-09-03 20:02:21,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:21,650 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-09-03 20:02:21,650 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-03 20:02:21,650 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-09-03 20:02:21,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-03 20:02:21,651 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:21,651 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:21,651 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:21,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:21,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1706727907, now seen corresponding path program 14 times [2019-09-03 20:02:21,652 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:21,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:21,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:21,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:02:21,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:21,661 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:21,661 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:21,661 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 [2019-09-03 20:02:21,699 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:02:21,720 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:02:21,721 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:21,722 WARN L254 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 67 conjunts are in the unsatisfiable core [2019-09-03 20:02:21,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:22,293 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:22,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:22,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-09-03 20:02:22,356 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-03 20:02:22,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-03 20:02:22,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2019-09-03 20:02:22,357 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 34 states. [2019-09-03 20:02:23,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:23,064 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-09-03 20:02:23,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-03 20:02:23,064 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 39 [2019-09-03 20:02:23,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:23,065 INFO L225 Difference]: With dead ends: 47 [2019-09-03 20:02:23,065 INFO L226 Difference]: Without dead ends: 42 [2019-09-03 20:02:23,066 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=1186, Unknown=0, NotChecked=0, Total=1260 [2019-09-03 20:02:23,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-03 20:02:23,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-09-03 20:02:23,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-03 20:02:23,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2019-09-03 20:02:23,075 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2019-09-03 20:02:23,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:23,075 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2019-09-03 20:02:23,075 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-03 20:02:23,075 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2019-09-03 20:02:23,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-03 20:02:23,076 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:23,076 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:23,076 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:23,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:23,077 INFO L82 PathProgramCache]: Analyzing trace with hash 623372449, now seen corresponding path program 15 times [2019-09-03 20:02:23,077 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:23,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:23,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:23,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:23,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:23,087 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:23,087 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:23,087 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:23,104 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:02:23,162 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-09-03 20:02:23,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:23,164 WARN L254 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 71 conjunts are in the unsatisfiable core [2019-09-03 20:02:23,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:23,878 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:23,965 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:23,969 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:23,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-09-03 20:02:23,970 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-03 20:02:23,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-03 20:02:23,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2019-09-03 20:02:23,971 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 36 states. [2019-09-03 20:02:24,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:24,776 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-09-03 20:02:24,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-03 20:02:24,778 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 41 [2019-09-03 20:02:24,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:24,779 INFO L225 Difference]: With dead ends: 49 [2019-09-03 20:02:24,779 INFO L226 Difference]: Without dead ends: 44 [2019-09-03 20:02:24,780 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=1328, Unknown=0, NotChecked=0, Total=1406 [2019-09-03 20:02:24,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-03 20:02:24,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-09-03 20:02:24,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-03 20:02:24,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-09-03 20:02:24,784 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2019-09-03 20:02:24,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:24,785 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-09-03 20:02:24,785 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-03 20:02:24,785 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-09-03 20:02:24,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-03 20:02:24,786 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:24,786 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:24,786 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:24,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:24,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1099137057, now seen corresponding path program 16 times [2019-09-03 20:02:24,787 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:24,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:24,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:24,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:24,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:24,796 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:24,796 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:24,796 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 [2019-09-03 20:02:24,813 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:02:24,833 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:02:24,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:24,835 WARN L254 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 75 conjunts are in the unsatisfiable core [2019-09-03 20:02:24,837 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:25,541 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:25,610 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:25,613 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:25,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-09-03 20:02:25,614 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-03 20:02:25,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-03 20:02:25,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2019-09-03 20:02:25,615 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 38 states. [2019-09-03 20:02:26,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:26,487 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-09-03 20:02:26,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-03 20:02:26,488 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 43 [2019-09-03 20:02:26,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:26,488 INFO L225 Difference]: With dead ends: 51 [2019-09-03 20:02:26,488 INFO L226 Difference]: Without dead ends: 46 [2019-09-03 20:02:26,489 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=82, Invalid=1478, Unknown=0, NotChecked=0, Total=1560 [2019-09-03 20:02:26,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-09-03 20:02:26,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-09-03 20:02:26,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-09-03 20:02:26,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-09-03 20:02:26,495 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2019-09-03 20:02:26,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:26,496 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-09-03 20:02:26,496 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-03 20:02:26,496 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-09-03 20:02:26,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-09-03 20:02:26,497 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:26,497 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:26,497 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:26,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:26,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1426603933, now seen corresponding path program 17 times [2019-09-03 20:02:26,497 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:26,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:26,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:26,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:26,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:26,506 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:26,507 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:26,507 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 [2019-09-03 20:02:26,528 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:02:26,558 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-09-03 20:02:26,558 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:26,559 WARN L254 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 79 conjunts are in the unsatisfiable core [2019-09-03 20:02:26,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:27,317 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:02:27,408 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:27,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-09-03 20:02:27,409 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-09-03 20:02:27,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-09-03 20:02:27,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2019-09-03 20:02:27,410 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 40 states. [2019-09-03 20:02:28,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:28,338 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2019-09-03 20:02:28,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-09-03 20:02:28,339 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 45 [2019-09-03 20:02:28,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:28,339 INFO L225 Difference]: With dead ends: 53 [2019-09-03 20:02:28,339 INFO L226 Difference]: Without dead ends: 48 [2019-09-03 20:02:28,341 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=1636, Unknown=0, NotChecked=0, Total=1722 [2019-09-03 20:02:28,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-03 20:02:28,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-09-03 20:02:28,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-03 20:02:28,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-09-03 20:02:28,346 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2019-09-03 20:02:28,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:28,346 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-09-03 20:02:28,346 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-09-03 20:02:28,347 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-09-03 20:02:28,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-03 20:02:28,347 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:28,347 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:28,348 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:28,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:28,348 INFO L82 PathProgramCache]: Analyzing trace with hash 2007173083, now seen corresponding path program 18 times [2019-09-03 20:02:28,348 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:28,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:28,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:28,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:28,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:28,356 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:28,356 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:28,357 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 [2019-09-03 20:02:28,380 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:02:28,458 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-03 20:02:28,458 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:28,460 WARN L254 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 83 conjunts are in the unsatisfiable core [2019-09-03 20:02:28,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:29,347 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:29,420 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:29,423 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:29,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2019-09-03 20:02:29,423 INFO L454 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-09-03 20:02:29,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-09-03 20:02:29,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1640, Unknown=0, NotChecked=0, Total=1722 [2019-09-03 20:02:29,424 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 42 states. [2019-09-03 20:02:30,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:30,432 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2019-09-03 20:02:30,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-09-03 20:02:30,432 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 47 [2019-09-03 20:02:30,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:30,433 INFO L225 Difference]: With dead ends: 55 [2019-09-03 20:02:30,433 INFO L226 Difference]: Without dead ends: 50 [2019-09-03 20:02:30,435 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=90, Invalid=1802, Unknown=0, NotChecked=0, Total=1892 [2019-09-03 20:02:30,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-03 20:02:30,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-09-03 20:02:30,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-09-03 20:02:30,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2019-09-03 20:02:30,440 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2019-09-03 20:02:30,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:30,441 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2019-09-03 20:02:30,441 INFO L476 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-09-03 20:02:30,441 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2019-09-03 20:02:30,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-03 20:02:30,442 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:30,442 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:30,442 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:30,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:30,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1588377753, now seen corresponding path program 19 times [2019-09-03 20:02:30,443 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:30,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:30,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:30,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:30,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:30,451 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:30,452 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:30,452 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-03 20:02:30,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:02:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:02:30,494 WARN L254 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 87 conjunts are in the unsatisfiable core [2019-09-03 20:02:30,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:31,414 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:31,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:31,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2019-09-03 20:02:31,495 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-09-03 20:02:31,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-09-03 20:02:31,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2019-09-03 20:02:31,496 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 44 states. [2019-09-03 20:02:32,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:32,648 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2019-09-03 20:02:32,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-03 20:02:32,648 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 49 [2019-09-03 20:02:32,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:32,649 INFO L225 Difference]: With dead ends: 57 [2019-09-03 20:02:32,650 INFO L226 Difference]: Without dead ends: 52 [2019-09-03 20:02:32,651 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=94, Invalid=1976, Unknown=0, NotChecked=0, Total=2070 [2019-09-03 20:02:32,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-03 20:02:32,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-09-03 20:02:32,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-03 20:02:32,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2019-09-03 20:02:32,656 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2019-09-03 20:02:32,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:32,657 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2019-09-03 20:02:32,657 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-09-03 20:02:32,657 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2019-09-03 20:02:32,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-03 20:02:32,658 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:32,658 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:32,658 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:32,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:32,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1441975849, now seen corresponding path program 20 times [2019-09-03 20:02:32,658 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:32,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:32,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:32,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:02:32,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:32,667 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:32,667 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:32,667 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) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:32,688 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:02:32,715 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:02:32,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:32,717 WARN L254 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 91 conjunts are in the unsatisfiable core [2019-09-03 20:02:32,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:33,745 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:33,823 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:33,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:33,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2019-09-03 20:02:33,826 INFO L454 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-09-03 20:02:33,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-09-03 20:02:33,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1980, Unknown=0, NotChecked=0, Total=2070 [2019-09-03 20:02:33,828 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 46 states. [2019-09-03 20:02:35,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:35,057 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2019-09-03 20:02:35,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-09-03 20:02:35,059 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 51 [2019-09-03 20:02:35,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:35,060 INFO L225 Difference]: With dead ends: 59 [2019-09-03 20:02:35,060 INFO L226 Difference]: Without dead ends: 54 [2019-09-03 20:02:35,061 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=98, Invalid=2158, Unknown=0, NotChecked=0, Total=2256 [2019-09-03 20:02:35,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-03 20:02:35,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-09-03 20:02:35,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-03 20:02:35,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2019-09-03 20:02:35,066 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2019-09-03 20:02:35,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:35,066 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2019-09-03 20:02:35,066 INFO L476 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-09-03 20:02:35,066 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2019-09-03 20:02:35,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-09-03 20:02:35,067 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:35,067 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:35,067 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:35,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:35,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1623960683, now seen corresponding path program 21 times [2019-09-03 20:02:35,068 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:35,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:35,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:35,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:35,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:35,076 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:35,076 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:35,076 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) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:35,091 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:02:35,201 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-09-03 20:02:35,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:35,203 WARN L254 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 95 conjunts are in the unsatisfiable core [2019-09-03 20:02:35,204 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:36,304 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:36,389 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:36,392 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:36,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2019-09-03 20:02:36,393 INFO L454 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-09-03 20:02:36,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-09-03 20:02:36,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2162, Unknown=0, NotChecked=0, Total=2256 [2019-09-03 20:02:36,394 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 48 states. [2019-09-03 20:02:37,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:37,804 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2019-09-03 20:02:37,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-09-03 20:02:37,804 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 53 [2019-09-03 20:02:37,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:37,805 INFO L225 Difference]: With dead ends: 61 [2019-09-03 20:02:37,805 INFO L226 Difference]: Without dead ends: 56 [2019-09-03 20:02:37,807 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=102, Invalid=2348, Unknown=0, NotChecked=0, Total=2450 [2019-09-03 20:02:37,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-09-03 20:02:37,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-09-03 20:02:37,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-09-03 20:02:37,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2019-09-03 20:02:37,813 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2019-09-03 20:02:37,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:37,814 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2019-09-03 20:02:37,814 INFO L476 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-09-03 20:02:37,814 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2019-09-03 20:02:37,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-03 20:02:37,815 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:37,815 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:37,815 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:37,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:37,815 INFO L82 PathProgramCache]: Analyzing trace with hash -417727021, now seen corresponding path program 22 times [2019-09-03 20:02:37,816 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:37,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:37,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:37,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:37,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:37,824 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:37,825 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:37,825 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) [2019-09-03 20:02:37,856 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:37,895 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:02:37,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:37,897 WARN L254 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 99 conjunts are in the unsatisfiable core [2019-09-03 20:02:37,899 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:39,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:39,104 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:39,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:39,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2019-09-03 20:02:39,107 INFO L454 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-09-03 20:02:39,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-09-03 20:02:39,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=2352, Unknown=0, NotChecked=0, Total=2450 [2019-09-03 20:02:39,109 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 50 states. [2019-09-03 20:02:40,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:40,536 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2019-09-03 20:02:40,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-09-03 20:02:40,537 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 55 [2019-09-03 20:02:40,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:40,538 INFO L225 Difference]: With dead ends: 63 [2019-09-03 20:02:40,538 INFO L226 Difference]: Without dead ends: 58 [2019-09-03 20:02:40,539 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=106, Invalid=2546, Unknown=0, NotChecked=0, Total=2652 [2019-09-03 20:02:40,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-09-03 20:02:40,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-09-03 20:02:40,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-03 20:02:40,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2019-09-03 20:02:40,544 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2019-09-03 20:02:40,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:40,544 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2019-09-03 20:02:40,544 INFO L476 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-09-03 20:02:40,545 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2019-09-03 20:02:40,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-09-03 20:02:40,545 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:40,545 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:40,545 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:40,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:40,546 INFO L82 PathProgramCache]: Analyzing trace with hash -868347759, now seen corresponding path program 23 times [2019-09-03 20:02:40,546 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:40,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:40,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:40,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:40,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:40,553 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:40,553 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:40,554 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) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:40,580 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:02:40,618 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-09-03 20:02:40,618 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:40,620 WARN L254 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 103 conjunts are in the unsatisfiable core [2019-09-03 20:02:40,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:41,818 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:41,911 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:41,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:41,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2019-09-03 20:02:41,914 INFO L454 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-09-03 20:02:41,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-09-03 20:02:41,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=2550, Unknown=0, NotChecked=0, Total=2652 [2019-09-03 20:02:41,916 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 52 states. [2019-09-03 20:02:43,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:43,468 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2019-09-03 20:02:43,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-09-03 20:02:43,469 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 57 [2019-09-03 20:02:43,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:43,470 INFO L225 Difference]: With dead ends: 65 [2019-09-03 20:02:43,470 INFO L226 Difference]: Without dead ends: 60 [2019-09-03 20:02:43,472 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=110, Invalid=2752, Unknown=0, NotChecked=0, Total=2862 [2019-09-03 20:02:43,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-03 20:02:43,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-09-03 20:02:43,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-03 20:02:43,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2019-09-03 20:02:43,476 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2019-09-03 20:02:43,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:43,477 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2019-09-03 20:02:43,477 INFO L476 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-09-03 20:02:43,477 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2019-09-03 20:02:43,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-03 20:02:43,478 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:43,478 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:43,478 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:43,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:43,478 INFO L82 PathProgramCache]: Analyzing trace with hash -123180081, now seen corresponding path program 24 times [2019-09-03 20:02:43,478 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:43,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:43,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:43,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:43,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:43,486 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:43,486 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:43,486 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) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:43,501 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:02:43,574 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-09-03 20:02:43,574 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:43,576 WARN L254 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 107 conjunts are in the unsatisfiable core [2019-09-03 20:02:43,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:44,910 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:02:45,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:45,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2019-09-03 20:02:45,015 INFO L454 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-09-03 20:02:45,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-09-03 20:02:45,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2756, Unknown=0, NotChecked=0, Total=2862 [2019-09-03 20:02:45,016 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 54 states. [2019-09-03 20:02:46,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:46,624 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2019-09-03 20:02:46,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-09-03 20:02:46,625 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 59 [2019-09-03 20:02:46,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:46,626 INFO L225 Difference]: With dead ends: 67 [2019-09-03 20:02:46,627 INFO L226 Difference]: Without dead ends: 62 [2019-09-03 20:02:46,628 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=114, Invalid=2966, Unknown=0, NotChecked=0, Total=3080 [2019-09-03 20:02:46,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-09-03 20:02:46,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-09-03 20:02:46,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-09-03 20:02:46,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2019-09-03 20:02:46,632 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2019-09-03 20:02:46,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:46,632 INFO L475 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2019-09-03 20:02:46,632 INFO L476 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-09-03 20:02:46,632 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2019-09-03 20:02:46,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-03 20:02:46,633 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:46,633 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:46,633 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:46,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:46,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1276579955, now seen corresponding path program 25 times [2019-09-03 20:02:46,634 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:46,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:46,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:46,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:46,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:46,642 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:46,642 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:46,642 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 [2019-09-03 20:02:46,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:02:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:02:46,697 WARN L254 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 111 conjunts are in the unsatisfiable core [2019-09-03 20:02:46,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:48,174 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:48,340 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:48,345 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:48,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2019-09-03 20:02:48,346 INFO L454 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-09-03 20:02:48,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-09-03 20:02:48,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2970, Unknown=0, NotChecked=0, Total=3080 [2019-09-03 20:02:48,349 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 56 states. [2019-09-03 20:02:50,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:50,266 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2019-09-03 20:02:50,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-09-03 20:02:50,266 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 61 [2019-09-03 20:02:50,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:50,267 INFO L225 Difference]: With dead ends: 69 [2019-09-03 20:02:50,267 INFO L226 Difference]: Without dead ends: 64 [2019-09-03 20:02:50,269 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=118, Invalid=3188, Unknown=0, NotChecked=0, Total=3306 [2019-09-03 20:02:50,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-09-03 20:02:50,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-09-03 20:02:50,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-09-03 20:02:50,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2019-09-03 20:02:50,273 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2019-09-03 20:02:50,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:50,274 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2019-09-03 20:02:50,274 INFO L476 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-09-03 20:02:50,274 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2019-09-03 20:02:50,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-09-03 20:02:50,275 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:50,275 INFO L399 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:50,275 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:50,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:50,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1592296501, now seen corresponding path program 26 times [2019-09-03 20:02:50,275 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:50,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:50,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:50,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:02:50,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:50,284 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:50,284 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:50,284 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 [2019-09-03 20:02:50,308 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:02:50,348 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:02:50,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:50,350 WARN L254 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 115 conjunts are in the unsatisfiable core [2019-09-03 20:02:50,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:51,867 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:51,981 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:51,984 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:51,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2019-09-03 20:02:51,985 INFO L454 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-09-03 20:02:51,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-09-03 20:02:51,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=3192, Unknown=0, NotChecked=0, Total=3306 [2019-09-03 20:02:51,986 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 58 states. [2019-09-03 20:02:53,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:53,835 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2019-09-03 20:02:53,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-09-03 20:02:53,836 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 63 [2019-09-03 20:02:53,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:53,836 INFO L225 Difference]: With dead ends: 71 [2019-09-03 20:02:53,836 INFO L226 Difference]: Without dead ends: 66 [2019-09-03 20:02:53,837 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=122, Invalid=3418, Unknown=0, NotChecked=0, Total=3540 [2019-09-03 20:02:53,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-03 20:02:53,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-09-03 20:02:53,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-03 20:02:53,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2019-09-03 20:02:53,842 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2019-09-03 20:02:53,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:53,842 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2019-09-03 20:02:53,842 INFO L476 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-09-03 20:02:53,843 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2019-09-03 20:02:53,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-03 20:02:53,843 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:53,843 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:53,843 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:53,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:53,844 INFO L82 PathProgramCache]: Analyzing trace with hash -53219191, now seen corresponding path program 27 times [2019-09-03 20:02:53,844 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:53,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:53,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:53,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:53,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:53,851 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:53,851 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:53,851 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) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:53,886 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:02:54,427 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2019-09-03 20:02:54,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:54,430 WARN L254 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 119 conjunts are in the unsatisfiable core [2019-09-03 20:02:54,433 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:02:56,138 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:02:56,258 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:02:56,261 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:02:56,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2019-09-03 20:02:56,261 INFO L454 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-09-03 20:02:56,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-09-03 20:02:56,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=3422, Unknown=0, NotChecked=0, Total=3540 [2019-09-03 20:02:56,262 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 60 states. [2019-09-03 20:02:58,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:02:58,396 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2019-09-03 20:02:58,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-09-03 20:02:58,397 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 65 [2019-09-03 20:02:58,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:02:58,398 INFO L225 Difference]: With dead ends: 73 [2019-09-03 20:02:58,398 INFO L226 Difference]: Without dead ends: 68 [2019-09-03 20:02:58,399 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=126, Invalid=3656, Unknown=0, NotChecked=0, Total=3782 [2019-09-03 20:02:58,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-03 20:02:58,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-09-03 20:02:58,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-03 20:02:58,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2019-09-03 20:02:58,404 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2019-09-03 20:02:58,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:02:58,405 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2019-09-03 20:02:58,405 INFO L476 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-09-03 20:02:58,405 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2019-09-03 20:02:58,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-03 20:02:58,406 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:02:58,406 INFO L399 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:02:58,406 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:02:58,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:02:58,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1531325895, now seen corresponding path program 28 times [2019-09-03 20:02:58,406 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:02:58,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:02:58,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:58,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:02:58,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:02:58,414 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:02:58,414 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:02:58,415 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) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:02:58,446 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:02:58,492 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:02:58,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:02:58,497 WARN L254 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 123 conjunts are in the unsatisfiable core [2019-09-03 20:02:58,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:00,293 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:03:00,407 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:03:00,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:03:00,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2019-09-03 20:03:00,411 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-09-03 20:03:00,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-09-03 20:03:00,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=3660, Unknown=0, NotChecked=0, Total=3782 [2019-09-03 20:03:00,411 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 62 states. [2019-09-03 20:03:02,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:03:02,667 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2019-09-03 20:03:02,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-09-03 20:03:02,667 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 67 [2019-09-03 20:03:02,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:03:02,669 INFO L225 Difference]: With dead ends: 75 [2019-09-03 20:03:02,669 INFO L226 Difference]: Without dead ends: 70 [2019-09-03 20:03:02,670 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=130, Invalid=3902, Unknown=0, NotChecked=0, Total=4032 [2019-09-03 20:03:02,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-09-03 20:03:02,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-09-03 20:03:02,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-09-03 20:03:02,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2019-09-03 20:03:02,674 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2019-09-03 20:03:02,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:03:02,675 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2019-09-03 20:03:02,675 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-09-03 20:03:02,675 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2019-09-03 20:03:02,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-09-03 20:03:02,675 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:03:02,676 INFO L399 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:03:02,676 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:03:02,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:03:02,676 INFO L82 PathProgramCache]: Analyzing trace with hash -434236539, now seen corresponding path program 29 times [2019-09-03 20:03:02,676 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:03:02,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:03:02,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:02,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:03:02,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:02,684 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:03:02,684 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:03:02,684 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) [2019-09-03 20:03:02,703 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:03:02,759 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-09-03 20:03:02,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:03:02,762 WARN L254 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 127 conjunts are in the unsatisfiable core [2019-09-03 20:03:02,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:04,623 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:03:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:03:04,743 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:03:04,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2019-09-03 20:03:04,744 INFO L454 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-09-03 20:03:04,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-09-03 20:03:04,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=3906, Unknown=0, NotChecked=0, Total=4032 [2019-09-03 20:03:04,745 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 64 states. [2019-09-03 20:03:07,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:03:07,085 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2019-09-03 20:03:07,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-09-03 20:03:07,086 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 69 [2019-09-03 20:03:07,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:03:07,087 INFO L225 Difference]: With dead ends: 77 [2019-09-03 20:03:07,087 INFO L226 Difference]: Without dead ends: 72 [2019-09-03 20:03:07,088 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=134, Invalid=4156, Unknown=0, NotChecked=0, Total=4290 [2019-09-03 20:03:07,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-09-03 20:03:07,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-09-03 20:03:07,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-03 20:03:07,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2019-09-03 20:03:07,093 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2019-09-03 20:03:07,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:03:07,093 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2019-09-03 20:03:07,093 INFO L476 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-09-03 20:03:07,094 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2019-09-03 20:03:07,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-09-03 20:03:07,094 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:03:07,094 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:03:07,095 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:03:07,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:03:07,095 INFO L82 PathProgramCache]: Analyzing trace with hash 445874627, now seen corresponding path program 30 times [2019-09-03 20:03:07,095 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:03:07,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:03:07,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:07,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:03:07,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:07,102 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:03:07,102 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:03:07,103 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 [2019-09-03 20:03:07,116 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:03:07,281 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-09-03 20:03:07,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:03:07,284 WARN L254 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 131 conjunts are in the unsatisfiable core [2019-09-03 20:03:07,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:09,241 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:03:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:03:09,361 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:03:09,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2019-09-03 20:03:09,362 INFO L454 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-09-03 20:03:09,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-09-03 20:03:09,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=4160, Unknown=0, NotChecked=0, Total=4290 [2019-09-03 20:03:09,363 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 66 states. [2019-09-03 20:03:11,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:03:11,999 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2019-09-03 20:03:11,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-09-03 20:03:11,999 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 71 [2019-09-03 20:03:12,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:03:12,001 INFO L225 Difference]: With dead ends: 79 [2019-09-03 20:03:12,001 INFO L226 Difference]: Without dead ends: 74 [2019-09-03 20:03:12,002 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=138, Invalid=4418, Unknown=0, NotChecked=0, Total=4556 [2019-09-03 20:03:12,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-09-03 20:03:12,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-09-03 20:03:12,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-09-03 20:03:12,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2019-09-03 20:03:12,007 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2019-09-03 20:03:12,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:03:12,007 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2019-09-03 20:03:12,007 INFO L476 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-09-03 20:03:12,007 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2019-09-03 20:03:12,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-03 20:03:12,008 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:03:12,008 INFO L399 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:03:12,008 INFO L418 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:03:12,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:03:12,008 INFO L82 PathProgramCache]: Analyzing trace with hash 124147841, now seen corresponding path program 31 times [2019-09-03 20:03:12,009 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:03:12,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:03:12,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:12,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:03:12,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:12,016 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:03:12,017 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:03:12,017 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) [2019-09-03 20:03:12,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:03:12,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:03:12,092 WARN L254 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 135 conjunts are in the unsatisfiable core [2019-09-03 20:03:12,094 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:14,178 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:03:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:03:14,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:03:14,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2019-09-03 20:03:14,305 INFO L454 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-09-03 20:03:14,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-09-03 20:03:14,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=4422, Unknown=0, NotChecked=0, Total=4556 [2019-09-03 20:03:14,306 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 68 states. [2019-09-03 20:03:16,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:03:16,989 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2019-09-03 20:03:16,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-09-03 20:03:16,989 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 73 [2019-09-03 20:03:16,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:03:16,990 INFO L225 Difference]: With dead ends: 81 [2019-09-03 20:03:16,990 INFO L226 Difference]: Without dead ends: 76 [2019-09-03 20:03:16,991 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=142, Invalid=4688, Unknown=0, NotChecked=0, Total=4830 [2019-09-03 20:03:16,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-09-03 20:03:16,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-09-03 20:03:16,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-09-03 20:03:16,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2019-09-03 20:03:16,997 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2019-09-03 20:03:16,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:03:16,997 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2019-09-03 20:03:16,997 INFO L476 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-09-03 20:03:16,998 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2019-09-03 20:03:16,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-09-03 20:03:16,998 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:03:16,998 INFO L399 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:03:16,998 INFO L418 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:03:16,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:03:16,999 INFO L82 PathProgramCache]: Analyzing trace with hash 182351807, now seen corresponding path program 32 times [2019-09-03 20:03:16,999 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:03:16,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:03:17,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:17,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:03:17,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:17,007 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:03:17,007 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:03:17,007 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:03:17,035 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:03:17,079 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:03:17,079 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:03:17,081 WARN L254 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 139 conjunts are in the unsatisfiable core [2019-09-03 20:03:17,082 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:19,306 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:03:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:03:19,437 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:03:19,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2019-09-03 20:03:19,438 INFO L454 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-09-03 20:03:19,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-09-03 20:03:19,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=4692, Unknown=0, NotChecked=0, Total=4830 [2019-09-03 20:03:19,438 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 70 states. [2019-09-03 20:03:22,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:03:22,325 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2019-09-03 20:03:22,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-09-03 20:03:22,326 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 75 [2019-09-03 20:03:22,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:03:22,327 INFO L225 Difference]: With dead ends: 83 [2019-09-03 20:03:22,327 INFO L226 Difference]: Without dead ends: 78 [2019-09-03 20:03:22,328 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=146, Invalid=4966, Unknown=0, NotChecked=0, Total=5112 [2019-09-03 20:03:22,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-03 20:03:22,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-09-03 20:03:22,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-09-03 20:03:22,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2019-09-03 20:03:22,334 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2019-09-03 20:03:22,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:03:22,334 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2019-09-03 20:03:22,334 INFO L476 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-09-03 20:03:22,334 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2019-09-03 20:03:22,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-09-03 20:03:22,335 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:03:22,335 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:03:22,335 INFO L418 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:03:22,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:03:22,336 INFO L82 PathProgramCache]: Analyzing trace with hash 281788285, now seen corresponding path program 33 times [2019-09-03 20:03:22,336 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:03:22,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:03:22,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:22,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:03:22,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:22,343 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:03:22,343 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:03:22,344 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) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:03:22,360 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:03:22,947 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2019-09-03 20:03:22,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:03:22,949 WARN L254 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 143 conjunts are in the unsatisfiable core [2019-09-03 20:03:22,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:25,236 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:03:25,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:03:25,378 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:03:25,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2019-09-03 20:03:25,378 INFO L454 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-09-03 20:03:25,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-09-03 20:03:25,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=4970, Unknown=0, NotChecked=0, Total=5112 [2019-09-03 20:03:25,379 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 72 states. [2019-09-03 20:03:28,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:03:28,382 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2019-09-03 20:03:28,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-09-03 20:03:28,386 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 77 [2019-09-03 20:03:28,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:03:28,388 INFO L225 Difference]: With dead ends: 85 [2019-09-03 20:03:28,388 INFO L226 Difference]: Without dead ends: 80 [2019-09-03 20:03:28,388 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=150, Invalid=5252, Unknown=0, NotChecked=0, Total=5402 [2019-09-03 20:03:28,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-09-03 20:03:28,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-09-03 20:03:28,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-09-03 20:03:28,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2019-09-03 20:03:28,393 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2019-09-03 20:03:28,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:03:28,393 INFO L475 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2019-09-03 20:03:28,393 INFO L476 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-09-03 20:03:28,393 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2019-09-03 20:03:28,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-03 20:03:28,394 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:03:28,394 INFO L399 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:03:28,394 INFO L418 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:03:28,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:03:28,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1350963131, now seen corresponding path program 34 times [2019-09-03 20:03:28,395 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:03:28,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:03:28,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:28,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:03:28,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:28,402 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:03:28,403 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:03:28,403 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) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:03:28,413 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:03:28,469 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:03:28,469 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:03:28,472 WARN L254 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 147 conjunts are in the unsatisfiable core [2019-09-03 20:03:28,474 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:30,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:03:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:03:31,126 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:03:31,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2019-09-03 20:03:31,127 INFO L454 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-09-03 20:03:31,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-09-03 20:03:31,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=5256, Unknown=0, NotChecked=0, Total=5402 [2019-09-03 20:03:31,128 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 74 states. [2019-09-03 20:03:34,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:03:34,347 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2019-09-03 20:03:34,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2019-09-03 20:03:34,347 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 79 [2019-09-03 20:03:34,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:03:34,348 INFO L225 Difference]: With dead ends: 87 [2019-09-03 20:03:34,349 INFO L226 Difference]: Without dead ends: 82 [2019-09-03 20:03:34,349 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=154, Invalid=5546, Unknown=0, NotChecked=0, Total=5700 [2019-09-03 20:03:34,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-09-03 20:03:34,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-09-03 20:03:34,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-09-03 20:03:34,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2019-09-03 20:03:34,354 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2019-09-03 20:03:34,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:03:34,354 INFO L475 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2019-09-03 20:03:34,354 INFO L476 AbstractCegarLoop]: Interpolant automaton has 74 states. [2019-09-03 20:03:34,354 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2019-09-03 20:03:34,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-03 20:03:34,355 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:03:34,355 INFO L399 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:03:34,355 INFO L418 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:03:34,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:03:34,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1964160903, now seen corresponding path program 35 times [2019-09-03 20:03:34,356 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:03:34,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:03:34,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:34,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:03:34,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:34,364 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:03:34,364 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:03:34,364 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) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:03:34,381 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:03:34,444 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2019-09-03 20:03:34,444 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:03:34,446 WARN L254 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 151 conjunts are in the unsatisfiable core [2019-09-03 20:03:34,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:37,124 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:03:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:03:37,269 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:03:37,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2019-09-03 20:03:37,271 INFO L454 AbstractCegarLoop]: Interpolant automaton has 76 states [2019-09-03 20:03:37,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2019-09-03 20:03:37,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=5550, Unknown=0, NotChecked=0, Total=5700 [2019-09-03 20:03:37,272 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 76 states. [2019-09-03 20:03:40,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:03:40,601 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2019-09-03 20:03:40,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2019-09-03 20:03:40,601 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 81 [2019-09-03 20:03:40,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:03:40,603 INFO L225 Difference]: With dead ends: 89 [2019-09-03 20:03:40,603 INFO L226 Difference]: Without dead ends: 84 [2019-09-03 20:03:40,604 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=158, Invalid=5848, Unknown=0, NotChecked=0, Total=6006 [2019-09-03 20:03:40,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-03 20:03:40,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-09-03 20:03:40,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-09-03 20:03:40,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2019-09-03 20:03:40,618 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2019-09-03 20:03:40,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:03:40,618 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2019-09-03 20:03:40,618 INFO L476 AbstractCegarLoop]: Interpolant automaton has 76 states. [2019-09-03 20:03:40,618 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2019-09-03 20:03:40,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-03 20:03:40,619 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:03:40,619 INFO L399 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:03:40,619 INFO L418 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:03:40,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:03:40,619 INFO L82 PathProgramCache]: Analyzing trace with hash -932623945, now seen corresponding path program 36 times [2019-09-03 20:03:40,620 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:03:40,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:03:40,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:40,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:03:40,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:40,627 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:03:40,627 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:03:40,628 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 [2019-09-03 20:03:40,657 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:03:40,915 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2019-09-03 20:03:40,915 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:03:40,918 WARN L254 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 155 conjunts are in the unsatisfiable core [2019-09-03 20:03:40,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:43,786 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:03:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:03:43,934 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:03:43,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2019-09-03 20:03:43,935 INFO L454 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-09-03 20:03:43,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-09-03 20:03:43,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=5852, Unknown=0, NotChecked=0, Total=6006 [2019-09-03 20:03:43,935 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 78 states. [2019-09-03 20:03:47,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:03:47,545 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2019-09-03 20:03:47,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2019-09-03 20:03:47,546 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 83 [2019-09-03 20:03:47,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:03:47,547 INFO L225 Difference]: With dead ends: 91 [2019-09-03 20:03:47,547 INFO L226 Difference]: Without dead ends: 86 [2019-09-03 20:03:47,548 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=162, Invalid=6158, Unknown=0, NotChecked=0, Total=6320 [2019-09-03 20:03:47,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-09-03 20:03:47,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-09-03 20:03:47,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-09-03 20:03:47,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2019-09-03 20:03:47,554 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2019-09-03 20:03:47,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:03:47,554 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2019-09-03 20:03:47,554 INFO L476 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-09-03 20:03:47,554 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2019-09-03 20:03:47,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-09-03 20:03:47,555 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:03:47,555 INFO L399 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:03:47,555 INFO L418 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:03:47,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:03:47,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1763052683, now seen corresponding path program 37 times [2019-09-03 20:03:47,556 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:03:47,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:03:47,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:47,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:03:47,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:47,563 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:03:47,563 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:03:47,564 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) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:03:47,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:03:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:03:47,640 WARN L254 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 159 conjunts are in the unsatisfiable core [2019-09-03 20:03:47,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:50,475 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:03:50,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:03:50,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:03:50,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2019-09-03 20:03:50,646 INFO L454 AbstractCegarLoop]: Interpolant automaton has 80 states [2019-09-03 20:03:50,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2019-09-03 20:03:50,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=6162, Unknown=0, NotChecked=0, Total=6320 [2019-09-03 20:03:50,647 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 80 states. [2019-09-03 20:03:54,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:03:54,300 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2019-09-03 20:03:54,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2019-09-03 20:03:54,301 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 85 [2019-09-03 20:03:54,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:03:54,301 INFO L225 Difference]: With dead ends: 93 [2019-09-03 20:03:54,301 INFO L226 Difference]: Without dead ends: 88 [2019-09-03 20:03:54,302 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=166, Invalid=6476, Unknown=0, NotChecked=0, Total=6642 [2019-09-03 20:03:54,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-09-03 20:03:54,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-09-03 20:03:54,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-09-03 20:03:54,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2019-09-03 20:03:54,308 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2019-09-03 20:03:54,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:03:54,308 INFO L475 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2019-09-03 20:03:54,308 INFO L476 AbstractCegarLoop]: Interpolant automaton has 80 states. [2019-09-03 20:03:54,308 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2019-09-03 20:03:54,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-09-03 20:03:54,309 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:03:54,309 INFO L399 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:03:54,309 INFO L418 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:03:54,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:03:54,310 INFO L82 PathProgramCache]: Analyzing trace with hash -941152845, now seen corresponding path program 38 times [2019-09-03 20:03:54,310 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:03:54,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:03:54,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:54,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:03:54,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:03:54,317 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:03:54,317 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:03:54,317 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-03 20:03:54,338 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:03:54,397 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:03:54,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:03:54,400 WARN L254 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 163 conjunts are in the unsatisfiable core [2019-09-03 20:03:54,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:03:57,379 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:03:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:03:57,542 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:03:57,542 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2019-09-03 20:03:57,542 INFO L454 AbstractCegarLoop]: Interpolant automaton has 82 states [2019-09-03 20:03:57,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2019-09-03 20:03:57,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=6480, Unknown=0, NotChecked=0, Total=6642 [2019-09-03 20:03:57,543 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 82 states. [2019-09-03 20:04:01,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:01,348 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2019-09-03 20:04:01,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2019-09-03 20:04:01,349 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 87 [2019-09-03 20:04:01,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:01,350 INFO L225 Difference]: With dead ends: 95 [2019-09-03 20:04:01,351 INFO L226 Difference]: Without dead ends: 90 [2019-09-03 20:04:01,351 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=170, Invalid=6802, Unknown=0, NotChecked=0, Total=6972 [2019-09-03 20:04:01,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-09-03 20:04:01,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-09-03 20:04:01,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-09-03 20:04:01,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2019-09-03 20:04:01,356 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2019-09-03 20:04:01,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:01,357 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2019-09-03 20:04:01,357 INFO L476 AbstractCegarLoop]: Interpolant automaton has 82 states. [2019-09-03 20:04:01,357 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2019-09-03 20:04:01,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-09-03 20:04:01,358 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:01,358 INFO L399 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:01,358 INFO L418 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:01,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:01,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1369390991, now seen corresponding path program 39 times [2019-09-03 20:04:01,358 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:01,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:01,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:01,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:01,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:01,367 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:04:01,367 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:04:01,367 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) [2019-09-03 20:04:01,394 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:04:02,936 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2019-09-03 20:04:02,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:02,939 WARN L254 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 167 conjunts are in the unsatisfiable core [2019-09-03 20:04:02,941 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:06,038 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:04:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:06,231 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:04:06,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2019-09-03 20:04:06,232 INFO L454 AbstractCegarLoop]: Interpolant automaton has 84 states [2019-09-03 20:04:06,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2019-09-03 20:04:06,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=6806, Unknown=0, NotChecked=0, Total=6972 [2019-09-03 20:04:06,233 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 84 states. [2019-09-03 20:04:10,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:10,324 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2019-09-03 20:04:10,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2019-09-03 20:04:10,324 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 89 [2019-09-03 20:04:10,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:10,325 INFO L225 Difference]: With dead ends: 97 [2019-09-03 20:04:10,326 INFO L226 Difference]: Without dead ends: 92 [2019-09-03 20:04:10,326 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=174, Invalid=7136, Unknown=0, NotChecked=0, Total=7310 [2019-09-03 20:04:10,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-09-03 20:04:10,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-09-03 20:04:10,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-09-03 20:04:10,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2019-09-03 20:04:10,332 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2019-09-03 20:04:10,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:10,333 INFO L475 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2019-09-03 20:04:10,333 INFO L476 AbstractCegarLoop]: Interpolant automaton has 84 states. [2019-09-03 20:04:10,333 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2019-09-03 20:04:10,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-03 20:04:10,333 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:10,334 INFO L399 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:10,334 INFO L418 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:10,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:10,334 INFO L82 PathProgramCache]: Analyzing trace with hash -589388881, now seen corresponding path program 40 times [2019-09-03 20:04:10,334 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:10,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:10,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:10,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:10,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:10,342 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:04:10,342 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:04:10,342 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 [2019-09-03 20:04:10,356 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:04:10,422 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:04:10,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:10,425 WARN L254 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 171 conjunts are in the unsatisfiable core [2019-09-03 20:04:10,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:13,669 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:04:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:13,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:04:13,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2019-09-03 20:04:13,836 INFO L454 AbstractCegarLoop]: Interpolant automaton has 86 states [2019-09-03 20:04:13,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2019-09-03 20:04:13,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=7140, Unknown=0, NotChecked=0, Total=7310 [2019-09-03 20:04:13,837 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 86 states. [2019-09-03 20:04:18,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:18,054 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2019-09-03 20:04:18,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2019-09-03 20:04:18,055 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 91 [2019-09-03 20:04:18,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:18,056 INFO L225 Difference]: With dead ends: 99 [2019-09-03 20:04:18,056 INFO L226 Difference]: Without dead ends: 94 [2019-09-03 20:04:18,056 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=178, Invalid=7478, Unknown=0, NotChecked=0, Total=7656 [2019-09-03 20:04:18,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-09-03 20:04:18,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-09-03 20:04:18,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-09-03 20:04:18,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2019-09-03 20:04:18,062 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2019-09-03 20:04:18,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:18,062 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2019-09-03 20:04:18,063 INFO L476 AbstractCegarLoop]: Interpolant automaton has 86 states. [2019-09-03 20:04:18,063 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2019-09-03 20:04:18,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-03 20:04:18,063 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:18,063 INFO L399 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:18,064 INFO L418 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:18,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:18,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1668329325, now seen corresponding path program 41 times [2019-09-03 20:04:18,064 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:18,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:18,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:18,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:18,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:18,072 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:04:18,072 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:04:18,072 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 [2019-09-03 20:04:18,100 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:04:18,198 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2019-09-03 20:04:18,198 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:18,201 WARN L254 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 175 conjunts are in the unsatisfiable core [2019-09-03 20:04:18,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:21,690 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:04:21,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:21,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:04:21,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2019-09-03 20:04:21,855 INFO L454 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-09-03 20:04:21,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-09-03 20:04:21,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=7482, Unknown=0, NotChecked=0, Total=7656 [2019-09-03 20:04:21,855 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 88 states. [2019-09-03 20:04:26,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:26,272 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2019-09-03 20:04:26,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2019-09-03 20:04:26,272 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 93 [2019-09-03 20:04:26,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:26,274 INFO L225 Difference]: With dead ends: 101 [2019-09-03 20:04:26,274 INFO L226 Difference]: Without dead ends: 96 [2019-09-03 20:04:26,274 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=182, Invalid=7828, Unknown=0, NotChecked=0, Total=8010 [2019-09-03 20:04:26,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-09-03 20:04:26,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-09-03 20:04:26,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-09-03 20:04:26,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2019-09-03 20:04:26,281 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2019-09-03 20:04:26,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:26,282 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2019-09-03 20:04:26,282 INFO L476 AbstractCegarLoop]: Interpolant automaton has 88 states. [2019-09-03 20:04:26,282 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2019-09-03 20:04:26,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-09-03 20:04:26,282 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:26,283 INFO L399 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:26,283 INFO L418 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:26,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:26,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1917926485, now seen corresponding path program 42 times [2019-09-03 20:04:26,283 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:26,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:26,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:26,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:26,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:26,291 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:04:26,291 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:04:26,291 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 [2019-09-03 20:04:26,308 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:04:27,461 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2019-09-03 20:04:27,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:27,464 WARN L254 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 179 conjunts are in the unsatisfiable core [2019-09-03 20:04:27,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:31,580 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:04:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:31,749 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:04:31,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2019-09-03 20:04:31,750 INFO L454 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-09-03 20:04:31,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-09-03 20:04:31,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=7832, Unknown=0, NotChecked=0, Total=8010 [2019-09-03 20:04:31,750 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 90 states. [2019-09-03 20:04:36,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:36,501 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2019-09-03 20:04:36,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2019-09-03 20:04:36,502 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 95 [2019-09-03 20:04:36,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:36,503 INFO L225 Difference]: With dead ends: 103 [2019-09-03 20:04:36,503 INFO L226 Difference]: Without dead ends: 98 [2019-09-03 20:04:36,504 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=186, Invalid=8186, Unknown=0, NotChecked=0, Total=8372 [2019-09-03 20:04:36,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-09-03 20:04:36,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-09-03 20:04:36,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-09-03 20:04:36,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2019-09-03 20:04:36,510 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2019-09-03 20:04:36,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:36,510 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2019-09-03 20:04:36,510 INFO L476 AbstractCegarLoop]: Interpolant automaton has 90 states. [2019-09-03 20:04:36,510 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2019-09-03 20:04:36,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-03 20:04:36,511 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:36,511 INFO L399 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:36,511 INFO L418 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:36,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:36,511 INFO L82 PathProgramCache]: Analyzing trace with hash 548978793, now seen corresponding path program 43 times [2019-09-03 20:04:36,511 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:36,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:36,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:36,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:36,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:36,519 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:04:36,520 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:04:36,520 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 [2019-09-03 20:04:36,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:04:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:36,610 WARN L254 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 183 conjunts are in the unsatisfiable core [2019-09-03 20:04:36,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:40,360 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:04:40,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:40,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:04:40,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2019-09-03 20:04:40,535 INFO L454 AbstractCegarLoop]: Interpolant automaton has 92 states [2019-09-03 20:04:40,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2019-09-03 20:04:40,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=8190, Unknown=0, NotChecked=0, Total=8372 [2019-09-03 20:04:40,536 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 92 states. [2019-09-03 20:04:45,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:45,355 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2019-09-03 20:04:45,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-09-03 20:04:45,356 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 97 [2019-09-03 20:04:45,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:45,357 INFO L225 Difference]: With dead ends: 105 [2019-09-03 20:04:45,357 INFO L226 Difference]: Without dead ends: 100 [2019-09-03 20:04:45,358 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=190, Invalid=8552, Unknown=0, NotChecked=0, Total=8742 [2019-09-03 20:04:45,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-09-03 20:04:45,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-09-03 20:04:45,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-09-03 20:04:45,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2019-09-03 20:04:45,363 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2019-09-03 20:04:45,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:45,364 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2019-09-03 20:04:45,364 INFO L476 AbstractCegarLoop]: Interpolant automaton has 92 states. [2019-09-03 20:04:45,364 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2019-09-03 20:04:45,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-09-03 20:04:45,365 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:45,365 INFO L399 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:45,365 INFO L418 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:45,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:45,365 INFO L82 PathProgramCache]: Analyzing trace with hash 423003559, now seen corresponding path program 44 times [2019-09-03 20:04:45,365 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:45,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:45,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:45,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:04:45,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:45,373 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:04:45,373 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:04:45,373 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 [2019-09-03 20:04:45,394 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:04:45,466 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:04:45,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:45,469 WARN L254 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 187 conjunts are in the unsatisfiable core [2019-09-03 20:04:45,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:49,387 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:04:49,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:49,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:04:49,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2019-09-03 20:04:49,573 INFO L454 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-09-03 20:04:49,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-09-03 20:04:49,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=8556, Unknown=0, NotChecked=0, Total=8742 [2019-09-03 20:04:49,574 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 94 states. [2019-09-03 20:04:54,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:54,666 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2019-09-03 20:04:54,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2019-09-03 20:04:54,666 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 99 [2019-09-03 20:04:54,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:54,667 INFO L225 Difference]: With dead ends: 107 [2019-09-03 20:04:54,667 INFO L226 Difference]: Without dead ends: 102 [2019-09-03 20:04:54,668 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=194, Invalid=8926, Unknown=0, NotChecked=0, Total=9120 [2019-09-03 20:04:54,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-09-03 20:04:54,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2019-09-03 20:04:54,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-09-03 20:04:54,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2019-09-03 20:04:54,673 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2019-09-03 20:04:54,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:54,673 INFO L475 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2019-09-03 20:04:54,673 INFO L476 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-09-03 20:04:54,673 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2019-09-03 20:04:54,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-03 20:04:54,674 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:54,674 INFO L399 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:54,674 INFO L418 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:54,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:54,674 INFO L82 PathProgramCache]: Analyzing trace with hash -380112027, now seen corresponding path program 45 times [2019-09-03 20:04:54,674 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:54,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:54,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:54,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:54,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:54,685 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:04:54,685 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:04:54,685 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) [2019-09-03 20:04:54,698 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:04:56,978 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2019-09-03 20:04:56,978 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:56,981 WARN L254 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 191 conjunts are in the unsatisfiable core [2019-09-03 20:04:56,985 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:01,052 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:05:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:05:01,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:05:01,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2019-09-03 20:05:01,238 INFO L454 AbstractCegarLoop]: Interpolant automaton has 96 states [2019-09-03 20:05:01,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2019-09-03 20:05:01,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=8930, Unknown=0, NotChecked=0, Total=9120 [2019-09-03 20:05:01,239 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 96 states. [2019-09-03 20:05:06,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:06,680 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2019-09-03 20:05:06,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2019-09-03 20:05:06,681 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 101 [2019-09-03 20:05:06,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:06,682 INFO L225 Difference]: With dead ends: 109 [2019-09-03 20:05:06,682 INFO L226 Difference]: Without dead ends: 104 [2019-09-03 20:05:06,683 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=198, Invalid=9308, Unknown=0, NotChecked=0, Total=9506 [2019-09-03 20:05:06,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-03 20:05:06,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2019-09-03 20:05:06,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-09-03 20:05:06,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2019-09-03 20:05:06,689 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2019-09-03 20:05:06,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:06,690 INFO L475 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2019-09-03 20:05:06,690 INFO L476 AbstractCegarLoop]: Interpolant automaton has 96 states. [2019-09-03 20:05:06,690 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2019-09-03 20:05:06,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-09-03 20:05:06,690 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:06,691 INFO L399 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:06,691 INFO L418 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:06,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:06,691 INFO L82 PathProgramCache]: Analyzing trace with hash 919923107, now seen corresponding path program 46 times [2019-09-03 20:05:06,691 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:06,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:06,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:06,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:05:06,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:06,699 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:05:06,699 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:05:06,699 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) [2019-09-03 20:05:06,726 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:05:06,842 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:05:06,843 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:06,846 WARN L254 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 195 conjunts are in the unsatisfiable core [2019-09-03 20:05:06,848 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:11,090 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:05:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:05:11,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:05:11,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2019-09-03 20:05:11,281 INFO L454 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-09-03 20:05:11,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-09-03 20:05:11,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=9312, Unknown=0, NotChecked=0, Total=9506 [2019-09-03 20:05:11,282 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 98 states. [2019-09-03 20:05:16,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:16,652 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2019-09-03 20:05:16,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2019-09-03 20:05:16,652 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 103 [2019-09-03 20:05:16,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:16,653 INFO L225 Difference]: With dead ends: 111 [2019-09-03 20:05:16,653 INFO L226 Difference]: Without dead ends: 106 [2019-09-03 20:05:16,653 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=202, Invalid=9698, Unknown=0, NotChecked=0, Total=9900 [2019-09-03 20:05:16,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-09-03 20:05:16,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2019-09-03 20:05:16,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-03 20:05:16,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2019-09-03 20:05:16,659 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2019-09-03 20:05:16,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:16,660 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2019-09-03 20:05:16,660 INFO L476 AbstractCegarLoop]: Interpolant automaton has 98 states. [2019-09-03 20:05:16,660 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2019-09-03 20:05:16,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-09-03 20:05:16,660 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:16,660 INFO L399 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:16,661 INFO L418 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:16,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:16,661 INFO L82 PathProgramCache]: Analyzing trace with hash 418203745, now seen corresponding path program 47 times [2019-09-03 20:05:16,661 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:16,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:16,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:16,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:05:16,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:16,669 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:05:16,669 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:05:16,669 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 [2019-09-03 20:05:16,696 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:05:16,811 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2019-09-03 20:05:16,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:16,814 WARN L254 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 199 conjunts are in the unsatisfiable core [2019-09-03 20:05:16,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:21,277 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:05:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:05:21,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:05:21,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2019-09-03 20:05:21,467 INFO L454 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-09-03 20:05:21,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-09-03 20:05:21,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=9702, Unknown=0, NotChecked=0, Total=9900 [2019-09-03 20:05:21,468 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 100 states. [2019-09-03 20:05:27,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:27,086 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2019-09-03 20:05:27,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2019-09-03 20:05:27,086 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 105 [2019-09-03 20:05:27,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:27,088 INFO L225 Difference]: With dead ends: 113 [2019-09-03 20:05:27,088 INFO L226 Difference]: Without dead ends: 108 [2019-09-03 20:05:27,089 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=206, Invalid=10096, Unknown=0, NotChecked=0, Total=10302 [2019-09-03 20:05:27,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-09-03 20:05:27,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2019-09-03 20:05:27,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-09-03 20:05:27,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2019-09-03 20:05:27,095 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2019-09-03 20:05:27,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:27,096 INFO L475 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2019-09-03 20:05:27,096 INFO L476 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-09-03 20:05:27,096 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2019-09-03 20:05:27,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-03 20:05:27,097 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:27,097 INFO L399 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:27,097 INFO L418 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:27,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:27,098 INFO L82 PathProgramCache]: Analyzing trace with hash -697765985, now seen corresponding path program 48 times [2019-09-03 20:05:27,098 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:27,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:27,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:27,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:05:27,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:27,106 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:05:27,106 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:05:27,106 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) [2019-09-03 20:05:27,128 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:05:28,078 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2019-09-03 20:05:28,078 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:28,082 WARN L254 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 203 conjunts are in the unsatisfiable core [2019-09-03 20:05:28,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:32,659 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:05:32,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:05:32,855 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:05:32,856 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2019-09-03 20:05:32,856 INFO L454 AbstractCegarLoop]: Interpolant automaton has 102 states [2019-09-03 20:05:32,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2019-09-03 20:05:32,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=10100, Unknown=0, NotChecked=0, Total=10302 [2019-09-03 20:05:32,857 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 102 states. [2019-09-03 20:05:38,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:38,873 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2019-09-03 20:05:38,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2019-09-03 20:05:38,874 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 107 [2019-09-03 20:05:38,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:38,875 INFO L225 Difference]: With dead ends: 115 [2019-09-03 20:05:38,875 INFO L226 Difference]: Without dead ends: 110 [2019-09-03 20:05:38,876 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=210, Invalid=10502, Unknown=0, NotChecked=0, Total=10712 [2019-09-03 20:05:38,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-09-03 20:05:38,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2019-09-03 20:05:38,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-09-03 20:05:38,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2019-09-03 20:05:38,883 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2019-09-03 20:05:38,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:38,883 INFO L475 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2019-09-03 20:05:38,883 INFO L476 AbstractCegarLoop]: Interpolant automaton has 102 states. [2019-09-03 20:05:38,883 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2019-09-03 20:05:38,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-03 20:05:38,884 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:38,884 INFO L399 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:38,884 INFO L418 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:38,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:38,884 INFO L82 PathProgramCache]: Analyzing trace with hash 597147485, now seen corresponding path program 49 times [2019-09-03 20:05:38,885 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:38,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:38,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:38,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:05:38,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:38,893 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:05:38,893 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:05:38,894 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 [2019-09-03 20:05:38,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:05:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:39,019 WARN L254 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 207 conjunts are in the unsatisfiable core [2019-09-03 20:05:39,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:43,803 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:05:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:05:44,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:05:44,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2019-09-03 20:05:44,006 INFO L454 AbstractCegarLoop]: Interpolant automaton has 104 states [2019-09-03 20:05:44,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2019-09-03 20:05:44,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=10506, Unknown=0, NotChecked=0, Total=10712 [2019-09-03 20:05:44,007 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 104 states. [2019-09-03 20:05:50,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:50,056 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2019-09-03 20:05:50,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2019-09-03 20:05:50,057 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 109 [2019-09-03 20:05:50,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:50,059 INFO L225 Difference]: With dead ends: 117 [2019-09-03 20:05:50,059 INFO L226 Difference]: Without dead ends: 112 [2019-09-03 20:05:50,060 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=214, Invalid=10916, Unknown=0, NotChecked=0, Total=11130 [2019-09-03 20:05:50,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-09-03 20:05:50,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2019-09-03 20:05:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-09-03 20:05:50,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2019-09-03 20:05:50,066 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2019-09-03 20:05:50,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:50,066 INFO L475 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2019-09-03 20:05:50,066 INFO L476 AbstractCegarLoop]: Interpolant automaton has 104 states. [2019-09-03 20:05:50,067 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2019-09-03 20:05:50,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-09-03 20:05:50,067 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:50,067 INFO L399 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:50,068 INFO L418 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:50,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:50,068 INFO L82 PathProgramCache]: Analyzing trace with hash -531523685, now seen corresponding path program 50 times [2019-09-03 20:05:50,068 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:50,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:50,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:50,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:05:50,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:50,076 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:05:50,076 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:05:50,076 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 [2019-09-03 20:05:50,089 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:05:50,187 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:05:50,188 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:50,191 WARN L254 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 211 conjunts are in the unsatisfiable core [2019-09-03 20:05:50,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:55,140 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:05:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:05:55,354 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:05:55,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2019-09-03 20:05:55,355 INFO L454 AbstractCegarLoop]: Interpolant automaton has 106 states [2019-09-03 20:05:55,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2019-09-03 20:05:55,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=10920, Unknown=0, NotChecked=0, Total=11130 [2019-09-03 20:05:55,356 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 106 states. [2019-09-03 20:06:01,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:06:01,911 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2019-09-03 20:06:01,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2019-09-03 20:06:01,912 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 111 [2019-09-03 20:06:01,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:06:01,913 INFO L225 Difference]: With dead ends: 119 [2019-09-03 20:06:01,913 INFO L226 Difference]: Without dead ends: 114 [2019-09-03 20:06:01,914 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=218, Invalid=11338, Unknown=0, NotChecked=0, Total=11556 [2019-09-03 20:06:01,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-09-03 20:06:01,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2019-09-03 20:06:01,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-09-03 20:06:01,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2019-09-03 20:06:01,921 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2019-09-03 20:06:01,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:06:01,921 INFO L475 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2019-09-03 20:06:01,921 INFO L476 AbstractCegarLoop]: Interpolant automaton has 106 states. [2019-09-03 20:06:01,921 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2019-09-03 20:06:01,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-09-03 20:06:01,922 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:06:01,922 INFO L399 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:06:01,922 INFO L418 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:06:01,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:06:01,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207833, now seen corresponding path program 51 times [2019-09-03 20:06:01,923 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:06:01,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:06:01,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:01,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:06:01,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:01,931 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:06:01,931 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:06:01,931 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) [2019-09-03 20:06:01,948 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:06:05,740 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2019-09-03 20:06:05,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:06:05,744 WARN L254 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 215 conjunts are in the unsatisfiable core [2019-09-03 20:06:05,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:06:10,973 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:06:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:06:11,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:06:11,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2019-09-03 20:06:11,176 INFO L454 AbstractCegarLoop]: Interpolant automaton has 108 states [2019-09-03 20:06:11,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2019-09-03 20:06:11,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=11342, Unknown=0, NotChecked=0, Total=11556 [2019-09-03 20:06:11,176 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 108 states. [2019-09-03 20:06:18,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:06:18,172 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2019-09-03 20:06:18,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2019-09-03 20:06:18,173 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 113 [2019-09-03 20:06:18,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:06:18,174 INFO L225 Difference]: With dead ends: 121 [2019-09-03 20:06:18,174 INFO L226 Difference]: Without dead ends: 116 [2019-09-03 20:06:18,175 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=222, Invalid=11768, Unknown=0, NotChecked=0, Total=11990 [2019-09-03 20:06:18,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-09-03 20:06:18,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2019-09-03 20:06:18,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-09-03 20:06:18,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2019-09-03 20:06:18,183 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2019-09-03 20:06:18,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:06:18,183 INFO L475 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2019-09-03 20:06:18,183 INFO L476 AbstractCegarLoop]: Interpolant automaton has 108 states. [2019-09-03 20:06:18,183 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2019-09-03 20:06:18,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-03 20:06:18,184 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:06:18,184 INFO L399 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:06:18,184 INFO L418 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:06:18,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:06:18,185 INFO L82 PathProgramCache]: Analyzing trace with hash -177348201, now seen corresponding path program 52 times [2019-09-03 20:06:18,185 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:06:18,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:06:18,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:18,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:06:18,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:18,192 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:06:18,192 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:06:18,192 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:06:18,205 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:06:18,303 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:06:18,303 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:06:18,306 WARN L254 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 219 conjunts are in the unsatisfiable core [2019-09-03 20:06:18,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:06:23,590 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:06:23,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:06:23,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:06:23,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2019-09-03 20:06:23,806 INFO L454 AbstractCegarLoop]: Interpolant automaton has 110 states [2019-09-03 20:06:23,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2019-09-03 20:06:23,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=11772, Unknown=0, NotChecked=0, Total=11990 [2019-09-03 20:06:23,807 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 110 states. [2019-09-03 20:06:30,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:06:30,628 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2019-09-03 20:06:30,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2019-09-03 20:06:30,629 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 115 [2019-09-03 20:06:30,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:06:30,630 INFO L225 Difference]: With dead ends: 123 [2019-09-03 20:06:30,630 INFO L226 Difference]: Without dead ends: 118 [2019-09-03 20:06:30,631 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=226, Invalid=12206, Unknown=0, NotChecked=0, Total=12432 [2019-09-03 20:06:30,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-09-03 20:06:30,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2019-09-03 20:06:30,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-09-03 20:06:30,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2019-09-03 20:06:30,638 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2019-09-03 20:06:30,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:06:30,638 INFO L475 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2019-09-03 20:06:30,638 INFO L476 AbstractCegarLoop]: Interpolant automaton has 110 states. [2019-09-03 20:06:30,638 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2019-09-03 20:06:30,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-09-03 20:06:30,639 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:06:30,639 INFO L399 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:06:30,639 INFO L418 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:06:30,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:06:30,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1792535723, now seen corresponding path program 53 times [2019-09-03 20:06:30,640 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:06:30,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:06:30,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:30,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:06:30,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:30,648 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:06:30,648 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:06:30,648 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) [2019-09-03 20:06:30,668 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:06:30,818 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2019-09-03 20:06:30,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:06:30,822 WARN L254 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 223 conjunts are in the unsatisfiable core [2019-09-03 20:06:30,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:06:36,504 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:06:36,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:06:36,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:06:36,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2019-09-03 20:06:36,719 INFO L454 AbstractCegarLoop]: Interpolant automaton has 112 states [2019-09-03 20:06:36,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2019-09-03 20:06:36,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=12210, Unknown=0, NotChecked=0, Total=12432 [2019-09-03 20:06:36,720 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 112 states. [2019-09-03 20:06:44,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:06:44,013 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2019-09-03 20:06:44,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2019-09-03 20:06:44,013 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 117 [2019-09-03 20:06:44,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:06:44,014 INFO L225 Difference]: With dead ends: 125 [2019-09-03 20:06:44,014 INFO L226 Difference]: Without dead ends: 120 [2019-09-03 20:06:44,015 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=230, Invalid=12652, Unknown=0, NotChecked=0, Total=12882 [2019-09-03 20:06:44,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-09-03 20:06:44,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2019-09-03 20:06:44,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-09-03 20:06:44,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2019-09-03 20:06:44,021 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2019-09-03 20:06:44,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:06:44,021 INFO L475 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2019-09-03 20:06:44,022 INFO L476 AbstractCegarLoop]: Interpolant automaton has 112 states. [2019-09-03 20:06:44,022 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2019-09-03 20:06:44,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-09-03 20:06:44,022 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:06:44,023 INFO L399 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:06:44,023 INFO L418 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:06:44,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:06:44,023 INFO L82 PathProgramCache]: Analyzing trace with hash 790416787, now seen corresponding path program 54 times [2019-09-03 20:06:44,023 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:06:44,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:06:44,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:44,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:06:44,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:44,031 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:06:44,031 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:06:44,031 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 [2019-09-03 20:06:44,054 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:06:45,391 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2019-09-03 20:06:45,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:06:45,395 WARN L254 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 227 conjunts are in the unsatisfiable core [2019-09-03 20:06:45,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:06:51,326 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:06:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:06:51,542 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:06:51,542 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114] total 114 [2019-09-03 20:06:51,542 INFO L454 AbstractCegarLoop]: Interpolant automaton has 114 states [2019-09-03 20:06:51,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2019-09-03 20:06:51,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=12656, Unknown=0, NotChecked=0, Total=12882 [2019-09-03 20:06:51,543 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 114 states. [2019-09-03 20:06:58,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:06:58,904 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2019-09-03 20:06:58,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2019-09-03 20:06:58,905 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 119 [2019-09-03 20:06:58,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:06:58,905 INFO L225 Difference]: With dead ends: 127 [2019-09-03 20:06:58,906 INFO L226 Difference]: Without dead ends: 122 [2019-09-03 20:06:58,906 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=234, Invalid=13106, Unknown=0, NotChecked=0, Total=13340 [2019-09-03 20:06:58,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-09-03 20:06:58,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2019-09-03 20:06:58,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-09-03 20:06:58,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2019-09-03 20:06:58,912 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2019-09-03 20:06:58,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:06:58,912 INFO L475 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2019-09-03 20:06:58,912 INFO L476 AbstractCegarLoop]: Interpolant automaton has 114 states. [2019-09-03 20:06:58,912 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2019-09-03 20:06:58,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-03 20:06:58,913 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:06:58,913 INFO L399 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:06:58,913 INFO L418 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:06:58,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:06:58,914 INFO L82 PathProgramCache]: Analyzing trace with hash 516681809, now seen corresponding path program 55 times [2019-09-03 20:06:58,914 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:06:58,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:06:58,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:58,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:06:58,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:58,922 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:06:58,922 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:06:58,922 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 [2019-09-03 20:06:58,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:06:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:06:59,045 WARN L254 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 231 conjunts are in the unsatisfiable core [2019-09-03 20:06:59,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:07:05,139 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:07:05,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:07:05,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:07:05,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116] total 116 [2019-09-03 20:07:05,367 INFO L454 AbstractCegarLoop]: Interpolant automaton has 116 states [2019-09-03 20:07:05,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2019-09-03 20:07:05,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=13110, Unknown=0, NotChecked=0, Total=13340 [2019-09-03 20:07:05,368 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 116 states. [2019-09-03 20:07:13,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:07:13,073 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2019-09-03 20:07:13,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2019-09-03 20:07:13,073 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 121 [2019-09-03 20:07:13,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:07:13,074 INFO L225 Difference]: With dead ends: 129 [2019-09-03 20:07:13,074 INFO L226 Difference]: Without dead ends: 124 [2019-09-03 20:07:13,075 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=238, Invalid=13568, Unknown=0, NotChecked=0, Total=13806 [2019-09-03 20:07:13,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-09-03 20:07:13,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2019-09-03 20:07:13,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-09-03 20:07:13,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2019-09-03 20:07:13,080 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2019-09-03 20:07:13,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:07:13,080 INFO L475 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2019-09-03 20:07:13,080 INFO L476 AbstractCegarLoop]: Interpolant automaton has 116 states. [2019-09-03 20:07:13,081 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2019-09-03 20:07:13,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-09-03 20:07:13,081 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:07:13,081 INFO L399 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:07:13,081 INFO L418 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:07:13,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:07:13,082 INFO L82 PathProgramCache]: Analyzing trace with hash -549626993, now seen corresponding path program 56 times [2019-09-03 20:07:13,082 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:07:13,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:07:13,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:13,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:07:13,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:13,089 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:07:13,090 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:07:13,090 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 [2019-09-03 20:07:13,121 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:07:13,350 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:07:13,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:07:13,357 WARN L254 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 235 conjunts are in the unsatisfiable core [2019-09-03 20:07:13,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:07:19,564 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:07:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:07:19,798 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:07:19,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118] total 118 [2019-09-03 20:07:19,798 INFO L454 AbstractCegarLoop]: Interpolant automaton has 118 states [2019-09-03 20:07:19,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2019-09-03 20:07:19,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=13572, Unknown=0, NotChecked=0, Total=13806 [2019-09-03 20:07:19,799 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 118 states. [2019-09-03 20:07:28,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:07:28,088 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2019-09-03 20:07:28,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2019-09-03 20:07:28,093 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 123 [2019-09-03 20:07:28,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:07:28,093 INFO L225 Difference]: With dead ends: 131 [2019-09-03 20:07:28,093 INFO L226 Difference]: Without dead ends: 126 [2019-09-03 20:07:28,094 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=242, Invalid=14038, Unknown=0, NotChecked=0, Total=14280 [2019-09-03 20:07:28,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-09-03 20:07:28,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2019-09-03 20:07:28,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-09-03 20:07:28,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2019-09-03 20:07:28,099 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2019-09-03 20:07:28,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:07:28,099 INFO L475 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2019-09-03 20:07:28,099 INFO L476 AbstractCegarLoop]: Interpolant automaton has 118 states. [2019-09-03 20:07:28,099 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2019-09-03 20:07:28,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-09-03 20:07:28,099 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:07:28,099 INFO L399 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:07:28,100 INFO L418 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:07:28,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:07:28,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1224798029, now seen corresponding path program 57 times [2019-09-03 20:07:28,100 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:07:28,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:07:28,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:28,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:07:28,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:28,108 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:07:28,108 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:07:28,108 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 [2019-09-03 20:07:28,137 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:07:34,586 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2019-09-03 20:07:34,586 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:07:34,590 WARN L254 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 239 conjunts are in the unsatisfiable core [2019-09-03 20:07:34,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:07:41,116 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:07:41,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:07:41,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:07:41,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120] total 120 [2019-09-03 20:07:41,358 INFO L454 AbstractCegarLoop]: Interpolant automaton has 120 states [2019-09-03 20:07:41,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2019-09-03 20:07:41,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=14042, Unknown=0, NotChecked=0, Total=14280 [2019-09-03 20:07:41,359 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 120 states. [2019-09-03 20:07:50,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:07:50,137 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2019-09-03 20:07:50,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2019-09-03 20:07:50,138 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 125 [2019-09-03 20:07:50,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:07:50,139 INFO L225 Difference]: With dead ends: 133 [2019-09-03 20:07:50,139 INFO L226 Difference]: Without dead ends: 128 [2019-09-03 20:07:50,140 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=246, Invalid=14516, Unknown=0, NotChecked=0, Total=14762 [2019-09-03 20:07:50,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-09-03 20:07:50,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2019-09-03 20:07:50,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-09-03 20:07:50,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2019-09-03 20:07:50,145 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2019-09-03 20:07:50,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:07:50,145 INFO L475 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2019-09-03 20:07:50,145 INFO L476 AbstractCegarLoop]: Interpolant automaton has 120 states. [2019-09-03 20:07:50,146 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2019-09-03 20:07:50,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-09-03 20:07:50,146 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:07:50,146 INFO L399 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:07:50,146 INFO L418 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:07:50,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:07:50,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1345227659, now seen corresponding path program 58 times [2019-09-03 20:07:50,147 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:07:50,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:07:50,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:50,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:07:50,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:50,154 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:07:50,154 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:07:50,154 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) [2019-09-03 20:07:50,174 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:07:50,297 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:07:50,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:07:50,301 WARN L254 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 243 conjunts are in the unsatisfiable core [2019-09-03 20:07:50,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:07:56,844 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:07:57,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:07:57,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:07:57,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122] total 122 [2019-09-03 20:07:57,088 INFO L454 AbstractCegarLoop]: Interpolant automaton has 122 states [2019-09-03 20:07:57,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2019-09-03 20:07:57,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=14520, Unknown=0, NotChecked=0, Total=14762 [2019-09-03 20:07:57,089 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 122 states. [2019-09-03 20:08:05,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:08:05,652 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2019-09-03 20:08:05,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2019-09-03 20:08:05,652 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 127 [2019-09-03 20:08:05,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:08:05,654 INFO L225 Difference]: With dead ends: 135 [2019-09-03 20:08:05,654 INFO L226 Difference]: Without dead ends: 130 [2019-09-03 20:08:05,655 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=250, Invalid=15002, Unknown=0, NotChecked=0, Total=15252 [2019-09-03 20:08:05,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-09-03 20:08:05,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2019-09-03 20:08:05,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-09-03 20:08:05,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2019-09-03 20:08:05,661 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2019-09-03 20:08:05,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:08:05,661 INFO L475 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2019-09-03 20:08:05,662 INFO L476 AbstractCegarLoop]: Interpolant automaton has 122 states. [2019-09-03 20:08:05,662 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2019-09-03 20:08:05,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-09-03 20:08:05,662 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:08:05,663 INFO L399 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:08:05,663 INFO L418 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:08:05,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:08:05,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1113985097, now seen corresponding path program 59 times [2019-09-03 20:08:05,663 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:08:05,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:08:05,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:05,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:08:05,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:05,671 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:08:05,671 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:08:05,671 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:08:05,697 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:08:05,876 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2019-09-03 20:08:05,876 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:08:05,880 WARN L254 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 247 conjunts are in the unsatisfiable core [2019-09-03 20:08:05,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:08:12,744 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:08:12,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:08:12,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:08:12,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124] total 124 [2019-09-03 20:08:12,981 INFO L454 AbstractCegarLoop]: Interpolant automaton has 124 states [2019-09-03 20:08:12,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2019-09-03 20:08:12,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=15006, Unknown=0, NotChecked=0, Total=15252 [2019-09-03 20:08:12,981 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 124 states. [2019-09-03 20:08:21,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:08:21,679 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2019-09-03 20:08:21,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2019-09-03 20:08:21,680 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 129 [2019-09-03 20:08:21,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:08:21,682 INFO L225 Difference]: With dead ends: 137 [2019-09-03 20:08:21,682 INFO L226 Difference]: Without dead ends: 132 [2019-09-03 20:08:21,683 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=254, Invalid=15496, Unknown=0, NotChecked=0, Total=15750 [2019-09-03 20:08:21,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-09-03 20:08:21,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2019-09-03 20:08:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-09-03 20:08:21,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2019-09-03 20:08:21,689 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2019-09-03 20:08:21,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:08:21,690 INFO L475 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2019-09-03 20:08:21,690 INFO L476 AbstractCegarLoop]: Interpolant automaton has 124 states. [2019-09-03 20:08:21,690 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2019-09-03 20:08:21,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-09-03 20:08:21,691 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:08:21,691 INFO L399 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:08:21,691 INFO L418 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:08:21,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:08:21,691 INFO L82 PathProgramCache]: Analyzing trace with hash -2066784889, now seen corresponding path program 60 times [2019-09-03 20:08:21,691 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:08:21,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:08:21,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:21,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:08:21,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:21,699 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:08:21,699 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:08:21,699 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 [2019-09-03 20:08:21,716 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:08:23,593 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2019-09-03 20:08:23,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:08:23,601 WARN L254 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 251 conjunts are in the unsatisfiable core [2019-09-03 20:08:23,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:08:30,667 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:08:30,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:08:30,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:08:30,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126] total 126 [2019-09-03 20:08:30,928 INFO L454 AbstractCegarLoop]: Interpolant automaton has 126 states [2019-09-03 20:08:30,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2019-09-03 20:08:30,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=15500, Unknown=0, NotChecked=0, Total=15750 [2019-09-03 20:08:30,929 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 126 states. [2019-09-03 20:08:39,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:08:39,947 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2019-09-03 20:08:39,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2019-09-03 20:08:39,948 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 131 [2019-09-03 20:08:39,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:08:39,948 INFO L225 Difference]: With dead ends: 139 [2019-09-03 20:08:39,949 INFO L226 Difference]: Without dead ends: 134 [2019-09-03 20:08:39,949 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=258, Invalid=15998, Unknown=0, NotChecked=0, Total=16256 [2019-09-03 20:08:39,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-09-03 20:08:39,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2019-09-03 20:08:39,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-09-03 20:08:39,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2019-09-03 20:08:39,955 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2019-09-03 20:08:39,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:08:39,955 INFO L475 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2019-09-03 20:08:39,955 INFO L476 AbstractCegarLoop]: Interpolant automaton has 126 states. [2019-09-03 20:08:39,955 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2019-09-03 20:08:39,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-09-03 20:08:39,956 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:08:39,956 INFO L399 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:08:39,956 INFO L418 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:08:39,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:08:39,956 INFO L82 PathProgramCache]: Analyzing trace with hash -770026683, now seen corresponding path program 61 times [2019-09-03 20:08:39,956 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:08:39,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:08:39,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:39,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:08:39,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:39,964 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:08:39,964 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:08:39,964 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 [2019-09-03 20:08:40,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:08:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:08:40,147 WARN L254 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 255 conjunts are in the unsatisfiable core [2019-09-03 20:08:40,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:08:47,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:08:47,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:08:47,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:08:47,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128] total 128 [2019-09-03 20:08:47,492 INFO L454 AbstractCegarLoop]: Interpolant automaton has 128 states [2019-09-03 20:08:47,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2019-09-03 20:08:47,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=16002, Unknown=0, NotChecked=0, Total=16256 [2019-09-03 20:08:47,493 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 128 states. [2019-09-03 20:08:56,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:08:56,779 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2019-09-03 20:08:56,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2019-09-03 20:08:56,779 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 133 [2019-09-03 20:08:56,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:08:56,780 INFO L225 Difference]: With dead ends: 141 [2019-09-03 20:08:56,781 INFO L226 Difference]: Without dead ends: 136 [2019-09-03 20:08:56,781 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=262, Invalid=16508, Unknown=0, NotChecked=0, Total=16770 [2019-09-03 20:08:56,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-09-03 20:08:56,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2019-09-03 20:08:56,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-09-03 20:08:56,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2019-09-03 20:08:56,789 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2019-09-03 20:08:56,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:08:56,789 INFO L475 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2019-09-03 20:08:56,789 INFO L476 AbstractCegarLoop]: Interpolant automaton has 128 states. [2019-09-03 20:08:56,789 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2019-09-03 20:08:56,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-09-03 20:08:56,790 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:08:56,790 INFO L399 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:08:56,791 INFO L418 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:08:56,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:08:56,791 INFO L82 PathProgramCache]: Analyzing trace with hash -125906557, now seen corresponding path program 62 times [2019-09-03 20:08:56,791 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:08:56,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:08:56,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:56,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:08:56,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:56,799 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:08:56,799 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:08:56,799 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 [2019-09-03 20:08:56,822 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:08:56,961 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:08:56,962 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:08:56,965 WARN L254 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 259 conjunts are in the unsatisfiable core [2019-09-03 20:08:56,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:09:04,335 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:09:04,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:09:04,590 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:09:04,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130] total 130 [2019-09-03 20:09:04,591 INFO L454 AbstractCegarLoop]: Interpolant automaton has 130 states [2019-09-03 20:09:04,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2019-09-03 20:09:04,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=16512, Unknown=0, NotChecked=0, Total=16770 [2019-09-03 20:09:04,592 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 130 states. [2019-09-03 20:09:14,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:09:14,608 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2019-09-03 20:09:14,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2019-09-03 20:09:14,608 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 135 [2019-09-03 20:09:14,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:09:14,609 INFO L225 Difference]: With dead ends: 143 [2019-09-03 20:09:14,609 INFO L226 Difference]: Without dead ends: 138 [2019-09-03 20:09:14,610 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=266, Invalid=17026, Unknown=0, NotChecked=0, Total=17292 [2019-09-03 20:09:14,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-09-03 20:09:14,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2019-09-03 20:09:14,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-09-03 20:09:14,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2019-09-03 20:09:14,615 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2019-09-03 20:09:14,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:09:14,616 INFO L475 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2019-09-03 20:09:14,616 INFO L476 AbstractCegarLoop]: Interpolant automaton has 130 states. [2019-09-03 20:09:14,616 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2019-09-03 20:09:14,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-09-03 20:09:14,617 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:09:14,617 INFO L399 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:09:14,617 INFO L418 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:09:14,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:09:14,617 INFO L82 PathProgramCache]: Analyzing trace with hash 398243905, now seen corresponding path program 63 times [2019-09-03 20:09:14,617 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:09:14,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:09:14,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:09:14,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:09:14,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:09:14,625 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:09:14,626 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:09:14,626 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) [2019-09-03 20:09:14,652 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:09:25,541 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2019-09-03 20:09:25,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:09:25,546 WARN L254 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 263 conjunts are in the unsatisfiable core [2019-09-03 20:09:25,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:09:33,119 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:09:33,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:09:33,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:09:33,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132] total 132 [2019-09-03 20:09:33,386 INFO L454 AbstractCegarLoop]: Interpolant automaton has 132 states [2019-09-03 20:09:33,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2019-09-03 20:09:33,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=17030, Unknown=0, NotChecked=0, Total=17292 [2019-09-03 20:09:33,387 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 132 states. [2019-09-03 20:09:43,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:09:43,486 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2019-09-03 20:09:43,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2019-09-03 20:09:43,486 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 137 [2019-09-03 20:09:43,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:09:43,487 INFO L225 Difference]: With dead ends: 145 [2019-09-03 20:09:43,487 INFO L226 Difference]: Without dead ends: 140 [2019-09-03 20:09:43,488 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=270, Invalid=17552, Unknown=0, NotChecked=0, Total=17822 [2019-09-03 20:09:43,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-09-03 20:09:43,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2019-09-03 20:09:43,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-09-03 20:09:43,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2019-09-03 20:09:43,495 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2019-09-03 20:09:43,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:09:43,495 INFO L475 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2019-09-03 20:09:43,495 INFO L476 AbstractCegarLoop]: Interpolant automaton has 132 states. [2019-09-03 20:09:43,495 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2019-09-03 20:09:43,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-09-03 20:09:43,496 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:09:43,496 INFO L399 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:09:43,496 INFO L418 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:09:43,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:09:43,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1595664255, now seen corresponding path program 64 times [2019-09-03 20:09:43,497 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:09:43,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:09:43,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:09:43,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:09:43,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:09:43,505 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:09:43,506 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:09:43,506 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 [2019-09-03 20:09:43,516 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:09:43,695 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:09:43,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:09:43,699 WARN L254 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 267 conjunts are in the unsatisfiable core [2019-09-03 20:09:43,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:09:51,535 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:09:51,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:09:51,808 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:09:51,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134] total 134 [2019-09-03 20:09:51,809 INFO L454 AbstractCegarLoop]: Interpolant automaton has 134 states [2019-09-03 20:09:51,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2019-09-03 20:09:51,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=17556, Unknown=0, NotChecked=0, Total=17822 [2019-09-03 20:09:51,810 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 134 states. [2019-09-03 20:10:02,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:10:02,082 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2019-09-03 20:10:02,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2019-09-03 20:10:02,082 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 139 [2019-09-03 20:10:02,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:10:02,083 INFO L225 Difference]: With dead ends: 147 [2019-09-03 20:10:02,083 INFO L226 Difference]: Without dead ends: 142 [2019-09-03 20:10:02,084 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=274, Invalid=18086, Unknown=0, NotChecked=0, Total=18360 [2019-09-03 20:10:02,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-09-03 20:10:02,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2019-09-03 20:10:02,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-09-03 20:10:02,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2019-09-03 20:10:02,091 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2019-09-03 20:10:02,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:10:02,091 INFO L475 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2019-09-03 20:10:02,091 INFO L476 AbstractCegarLoop]: Interpolant automaton has 134 states. [2019-09-03 20:10:02,091 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2019-09-03 20:10:02,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-09-03 20:10:02,092 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:10:02,092 INFO L399 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:10:02,092 INFO L418 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:10:02,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:10:02,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1265385277, now seen corresponding path program 65 times [2019-09-03 20:10:02,092 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:10:02,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:10:02,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:02,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:10:02,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:02,098 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:10:02,098 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:10:02,098 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 [2019-09-03 20:10:02,108 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:10:02,462 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2019-09-03 20:10:02,462 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:10:02,467 WARN L254 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 271 conjunts are in the unsatisfiable core [2019-09-03 20:10:02,469 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:10:10,449 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:10:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:10:10,709 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:10:10,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136] total 136 [2019-09-03 20:10:10,710 INFO L454 AbstractCegarLoop]: Interpolant automaton has 136 states [2019-09-03 20:10:10,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2019-09-03 20:10:10,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=18090, Unknown=0, NotChecked=0, Total=18360 [2019-09-03 20:10:10,711 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 136 states. [2019-09-03 20:10:20,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:10:20,969 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2019-09-03 20:10:20,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2019-09-03 20:10:20,969 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 141 [2019-09-03 20:10:20,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:10:20,970 INFO L225 Difference]: With dead ends: 149 [2019-09-03 20:10:20,971 INFO L226 Difference]: Without dead ends: 144 [2019-09-03 20:10:20,971 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=278, Invalid=18628, Unknown=0, NotChecked=0, Total=18906 [2019-09-03 20:10:20,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-09-03 20:10:20,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2019-09-03 20:10:20,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-09-03 20:10:20,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2019-09-03 20:10:20,978 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2019-09-03 20:10:20,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:10:20,978 INFO L475 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2019-09-03 20:10:20,978 INFO L476 AbstractCegarLoop]: Interpolant automaton has 136 states. [2019-09-03 20:10:20,978 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2019-09-03 20:10:20,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-09-03 20:10:20,979 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:10:20,979 INFO L399 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:10:20,979 INFO L418 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:10:20,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:10:20,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1694867323, now seen corresponding path program 66 times [2019-09-03 20:10:20,979 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:10:20,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:10:20,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:20,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:10:20,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:20,987 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:10:20,988 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:10:20,988 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) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:10:21,017 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:10:27,632 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2019-09-03 20:10:27,633 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:10:27,637 WARN L254 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 275 conjunts are in the unsatisfiable core [2019-09-03 20:10:27,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:10:35,966 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:10:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:10:36,237 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:10:36,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138] total 138 [2019-09-03 20:10:36,237 INFO L454 AbstractCegarLoop]: Interpolant automaton has 138 states [2019-09-03 20:10:36,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2019-09-03 20:10:36,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=18632, Unknown=0, NotChecked=0, Total=18906 [2019-09-03 20:10:36,239 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 138 states. [2019-09-03 20:10:46,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:10:46,845 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2019-09-03 20:10:46,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2019-09-03 20:10:46,845 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 143 [2019-09-03 20:10:46,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:10:46,846 INFO L225 Difference]: With dead ends: 151 [2019-09-03 20:10:46,846 INFO L226 Difference]: Without dead ends: 146 [2019-09-03 20:10:46,847 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=282, Invalid=19178, Unknown=0, NotChecked=0, Total=19460 [2019-09-03 20:10:46,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-09-03 20:10:46,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2019-09-03 20:10:46,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-09-03 20:10:46,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2019-09-03 20:10:46,852 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2019-09-03 20:10:46,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:10:46,853 INFO L475 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2019-09-03 20:10:46,853 INFO L476 AbstractCegarLoop]: Interpolant automaton has 138 states. [2019-09-03 20:10:46,853 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2019-09-03 20:10:46,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-09-03 20:10:46,853 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:10:46,853 INFO L399 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:10:46,854 INFO L418 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:10:46,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:10:46,854 INFO L82 PathProgramCache]: Analyzing trace with hash 2110253113, now seen corresponding path program 67 times [2019-09-03 20:10:46,854 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:10:46,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:10:46,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:46,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:10:46,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:46,862 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:10:46,862 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:10:46,862 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) [2019-09-03 20:10:46,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:10:47,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:10:47,082 WARN L254 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 279 conjunts are in the unsatisfiable core [2019-09-03 20:10:47,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:10:55,512 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:10:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:10:55,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:10:55,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [140] total 140 [2019-09-03 20:10:55,781 INFO L454 AbstractCegarLoop]: Interpolant automaton has 140 states [2019-09-03 20:10:55,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2019-09-03 20:10:55,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=19182, Unknown=0, NotChecked=0, Total=19460 [2019-09-03 20:10:55,782 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 140 states. [2019-09-03 20:11:06,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:11:06,695 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2019-09-03 20:11:06,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2019-09-03 20:11:06,695 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 145 [2019-09-03 20:11:06,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:11:06,697 INFO L225 Difference]: With dead ends: 153 [2019-09-03 20:11:06,697 INFO L226 Difference]: Without dead ends: 148 [2019-09-03 20:11:06,698 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=286, Invalid=19736, Unknown=0, NotChecked=0, Total=20022 [2019-09-03 20:11:06,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-09-03 20:11:06,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2019-09-03 20:11:06,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-09-03 20:11:06,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2019-09-03 20:11:06,706 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2019-09-03 20:11:06,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:11:06,706 INFO L475 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2019-09-03 20:11:06,706 INFO L476 AbstractCegarLoop]: Interpolant automaton has 140 states. [2019-09-03 20:11:06,707 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2019-09-03 20:11:06,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-09-03 20:11:06,707 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:11:06,708 INFO L399 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:11:06,708 INFO L418 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:11:06,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:11:06,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1864038775, now seen corresponding path program 68 times [2019-09-03 20:11:06,708 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:11:06,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:11:06,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:11:06,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:11:06,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:11:06,716 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:11:06,716 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:11:06,716 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 [2019-09-03 20:11:06,728 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:11:06,930 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:11:06,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:11:06,935 WARN L254 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 283 conjunts are in the unsatisfiable core [2019-09-03 20:11:06,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:11:15,900 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:11:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:11:16,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:11:16,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [142] total 142 [2019-09-03 20:11:16,183 INFO L454 AbstractCegarLoop]: Interpolant automaton has 142 states [2019-09-03 20:11:16,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2019-09-03 20:11:16,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=19740, Unknown=0, NotChecked=0, Total=20022 [2019-09-03 20:11:16,184 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 142 states. [2019-09-03 20:11:28,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:11:28,218 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2019-09-03 20:11:28,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2019-09-03 20:11:28,219 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 147 [2019-09-03 20:11:28,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:11:28,221 INFO L225 Difference]: With dead ends: 155 [2019-09-03 20:11:28,221 INFO L226 Difference]: Without dead ends: 150 [2019-09-03 20:11:28,222 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=290, Invalid=20302, Unknown=0, NotChecked=0, Total=20592 [2019-09-03 20:11:28,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-09-03 20:11:28,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2019-09-03 20:11:28,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-09-03 20:11:28,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2019-09-03 20:11:28,231 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2019-09-03 20:11:28,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:11:28,232 INFO L475 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2019-09-03 20:11:28,232 INFO L476 AbstractCegarLoop]: Interpolant automaton has 142 states. [2019-09-03 20:11:28,232 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2019-09-03 20:11:28,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-09-03 20:11:28,233 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:11:28,233 INFO L399 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:11:28,234 INFO L418 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:11:28,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:11:28,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1475261237, now seen corresponding path program 69 times [2019-09-03 20:11:28,234 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:11:28,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:11:28,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:11:28,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:11:28,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:11:28,246 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:11:28,246 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:11:28,246 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) [2019-09-03 20:11:28,279 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:11:44,512 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2019-09-03 20:11:44,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:11:44,518 WARN L254 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 287 conjunts are in the unsatisfiable core [2019-09-03 20:11:44,520 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:11:53,620 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:11:53,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:11:53,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:11:53,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [144] total 144 [2019-09-03 20:11:53,907 INFO L454 AbstractCegarLoop]: Interpolant automaton has 144 states [2019-09-03 20:11:53,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2019-09-03 20:11:53,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=20306, Unknown=0, NotChecked=0, Total=20592 [2019-09-03 20:11:53,908 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 144 states. [2019-09-03 20:12:06,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:06,158 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2019-09-03 20:12:06,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2019-09-03 20:12:06,158 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 149 [2019-09-03 20:12:06,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:06,159 INFO L225 Difference]: With dead ends: 157 [2019-09-03 20:12:06,160 INFO L226 Difference]: Without dead ends: 152 [2019-09-03 20:12:06,161 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=294, Invalid=20876, Unknown=0, NotChecked=0, Total=21170 [2019-09-03 20:12:06,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-09-03 20:12:06,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2019-09-03 20:12:06,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-09-03 20:12:06,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2019-09-03 20:12:06,168 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2019-09-03 20:12:06,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:06,168 INFO L475 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2019-09-03 20:12:06,169 INFO L476 AbstractCegarLoop]: Interpolant automaton has 144 states. [2019-09-03 20:12:06,169 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2019-09-03 20:12:06,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-09-03 20:12:06,169 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:06,170 INFO L399 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:06,170 INFO L418 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:06,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:06,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1522201971, now seen corresponding path program 70 times [2019-09-03 20:12:06,170 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:06,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:06,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:06,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:12:06,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:06,178 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:12:06,178 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:12:06,179 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) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:12:06,204 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:12:06,420 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:12:06,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:12:06,425 WARN L254 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 291 conjunts are in the unsatisfiable core [2019-09-03 20:12:06,426 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:15,779 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:12:16,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:12:16,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:12:16,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [146] total 146 [2019-09-03 20:12:16,081 INFO L454 AbstractCegarLoop]: Interpolant automaton has 146 states [2019-09-03 20:12:16,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2019-09-03 20:12:16,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=20880, Unknown=0, NotChecked=0, Total=21170 [2019-09-03 20:12:16,083 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 146 states. [2019-09-03 20:12:28,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:28,333 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2019-09-03 20:12:28,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2019-09-03 20:12:28,334 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 151 [2019-09-03 20:12:28,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:28,335 INFO L225 Difference]: With dead ends: 159 [2019-09-03 20:12:28,335 INFO L226 Difference]: Without dead ends: 154 [2019-09-03 20:12:28,336 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=298, Invalid=21458, Unknown=0, NotChecked=0, Total=21756 [2019-09-03 20:12:28,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-09-03 20:12:28,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2019-09-03 20:12:28,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-09-03 20:12:28,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2019-09-03 20:12:28,342 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2019-09-03 20:12:28,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:28,342 INFO L475 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2019-09-03 20:12:28,342 INFO L476 AbstractCegarLoop]: Interpolant automaton has 146 states. [2019-09-03 20:12:28,342 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2019-09-03 20:12:28,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-09-03 20:12:28,342 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:28,343 INFO L399 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:28,343 INFO L418 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:28,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:28,343 INFO L82 PathProgramCache]: Analyzing trace with hash -612392911, now seen corresponding path program 71 times [2019-09-03 20:12:28,343 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:28,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:28,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:28,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:12:28,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:28,350 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:12:28,350 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:12:28,350 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 [2019-09-03 20:12:28,363 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:12:28,668 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2019-09-03 20:12:28,669 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:12:28,674 WARN L254 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 295 conjunts are in the unsatisfiable core [2019-09-03 20:12:28,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:38,313 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:12:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:12:38,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:12:38,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [148] total 148 [2019-09-03 20:12:38,600 INFO L454 AbstractCegarLoop]: Interpolant automaton has 148 states [2019-09-03 20:12:38,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2019-09-03 20:12:38,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=21462, Unknown=0, NotChecked=0, Total=21756 [2019-09-03 20:12:38,601 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 148 states. [2019-09-03 20:12:51,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:51,381 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2019-09-03 20:12:51,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2019-09-03 20:12:51,382 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 153 [2019-09-03 20:12:51,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:51,383 INFO L225 Difference]: With dead ends: 161 [2019-09-03 20:12:51,383 INFO L226 Difference]: Without dead ends: 156 [2019-09-03 20:12:51,384 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=302, Invalid=22048, Unknown=0, NotChecked=0, Total=22350 [2019-09-03 20:12:51,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-09-03 20:12:51,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2019-09-03 20:12:51,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-09-03 20:12:51,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2019-09-03 20:12:51,391 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2019-09-03 20:12:51,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:51,391 INFO L475 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2019-09-03 20:12:51,391 INFO L476 AbstractCegarLoop]: Interpolant automaton has 148 states. [2019-09-03 20:12:51,391 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2019-09-03 20:12:51,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-09-03 20:12:51,392 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:51,392 INFO L399 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:51,392 INFO L418 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:51,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:51,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1036292975, now seen corresponding path program 72 times [2019-09-03 20:12:51,393 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:51,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:51,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:51,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:12:51,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:51,400 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:12:51,400 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:12:51,401 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 [2019-09-03 20:12:51,414 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:12:55,683 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2019-09-03 20:12:55,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:12:55,694 WARN L254 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 299 conjunts are in the unsatisfiable core [2019-09-03 20:12:55,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:13:05,518 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:13:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:13:05,810 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:13:05,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [150] total 150 [2019-09-03 20:13:05,811 INFO L454 AbstractCegarLoop]: Interpolant automaton has 150 states [2019-09-03 20:13:05,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2019-09-03 20:13:05,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=22052, Unknown=0, NotChecked=0, Total=22350 [2019-09-03 20:13:05,812 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 150 states. [2019-09-03 20:13:18,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:13:18,527 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2019-09-03 20:13:18,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2019-09-03 20:13:18,527 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 155 [2019-09-03 20:13:18,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:13:18,528 INFO L225 Difference]: With dead ends: 163 [2019-09-03 20:13:18,528 INFO L226 Difference]: Without dead ends: 158 [2019-09-03 20:13:18,529 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=306, Invalid=22646, Unknown=0, NotChecked=0, Total=22952 [2019-09-03 20:13:18,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-09-03 20:13:18,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2019-09-03 20:13:18,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-09-03 20:13:18,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2019-09-03 20:13:18,536 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2019-09-03 20:13:18,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:13:18,537 INFO L475 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2019-09-03 20:13:18,537 INFO L476 AbstractCegarLoop]: Interpolant automaton has 150 states. [2019-09-03 20:13:18,537 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2019-09-03 20:13:18,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-09-03 20:13:18,538 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:13:18,538 INFO L399 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:13:18,538 INFO L418 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:13:18,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:13:18,538 INFO L82 PathProgramCache]: Analyzing trace with hash 580497197, now seen corresponding path program 73 times [2019-09-03 20:13:18,538 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:13:18,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:13:18,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:13:18,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:13:18,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:13:18,546 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:13:18,546 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:13:18,547 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 [2019-09-03 20:13:18,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:13:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:13:18,818 WARN L254 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 303 conjunts are in the unsatisfiable core [2019-09-03 20:13:18,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:13:28,811 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:13:29,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:13:29,120 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:13:29,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [152] total 152 [2019-09-03 20:13:29,120 INFO L454 AbstractCegarLoop]: Interpolant automaton has 152 states [2019-09-03 20:13:29,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2019-09-03 20:13:29,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=22650, Unknown=0, NotChecked=0, Total=22952 [2019-09-03 20:13:29,121 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 152 states. [2019-09-03 20:13:42,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:13:42,247 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2019-09-03 20:13:42,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2019-09-03 20:13:42,248 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 157 [2019-09-03 20:13:42,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:13:42,249 INFO L225 Difference]: With dead ends: 165 [2019-09-03 20:13:42,249 INFO L226 Difference]: Without dead ends: 160 [2019-09-03 20:13:42,250 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=310, Invalid=23252, Unknown=0, NotChecked=0, Total=23562 [2019-09-03 20:13:42,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-09-03 20:13:42,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2019-09-03 20:13:42,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-09-03 20:13:42,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2019-09-03 20:13:42,258 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2019-09-03 20:13:42,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:13:42,258 INFO L475 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2019-09-03 20:13:42,259 INFO L476 AbstractCegarLoop]: Interpolant automaton has 152 states. [2019-09-03 20:13:42,259 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2019-09-03 20:13:42,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-09-03 20:13:42,259 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:13:42,260 INFO L399 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:13:42,260 INFO L418 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:13:42,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:13:42,260 INFO L82 PathProgramCache]: Analyzing trace with hash 647418731, now seen corresponding path program 74 times [2019-09-03 20:13:42,260 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:13:42,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:13:42,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:13:42,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:13:42,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:13:42,269 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:13:42,269 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:13:42,269 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 [2019-09-03 20:13:42,293 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:13:42,801 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:13:42,801 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:13:42,807 WARN L254 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 307 conjunts are in the unsatisfiable core [2019-09-03 20:13:42,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:13:53,068 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:13:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:13:53,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:13:53,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [154] total 154 [2019-09-03 20:13:53,368 INFO L454 AbstractCegarLoop]: Interpolant automaton has 154 states [2019-09-03 20:13:53,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2019-09-03 20:13:53,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=23256, Unknown=0, NotChecked=0, Total=23562 [2019-09-03 20:13:53,369 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 154 states. [2019-09-03 20:14:07,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:14:07,164 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2019-09-03 20:14:07,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2019-09-03 20:14:07,165 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 159 [2019-09-03 20:14:07,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:14:07,166 INFO L225 Difference]: With dead ends: 167 [2019-09-03 20:14:07,166 INFO L226 Difference]: Without dead ends: 162 [2019-09-03 20:14:07,167 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=314, Invalid=23866, Unknown=0, NotChecked=0, Total=24180 [2019-09-03 20:14:07,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-09-03 20:14:07,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2019-09-03 20:14:07,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-09-03 20:14:07,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2019-09-03 20:14:07,176 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2019-09-03 20:14:07,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:14:07,176 INFO L475 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2019-09-03 20:14:07,176 INFO L476 AbstractCegarLoop]: Interpolant automaton has 154 states. [2019-09-03 20:14:07,176 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2019-09-03 20:14:07,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-09-03 20:14:07,177 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:14:07,177 INFO L399 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:14:07,177 INFO L418 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:14:07,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:14:07,178 INFO L82 PathProgramCache]: Analyzing trace with hash 534503465, now seen corresponding path program 75 times [2019-09-03 20:14:07,178 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:14:07,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:14:07,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:14:07,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:14:07,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:14:07,186 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:14:07,186 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:14:07,186 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 [2019-09-03 20:14:07,199 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:14:31,711 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2019-09-03 20:14:31,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:14:31,716 WARN L254 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 311 conjunts are in the unsatisfiable core [2019-09-03 20:14:31,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:14:42,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:14:42,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:14:42,575 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:14:42,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [156] total 156 [2019-09-03 20:14:42,576 INFO L454 AbstractCegarLoop]: Interpolant automaton has 156 states [2019-09-03 20:14:42,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2019-09-03 20:14:42,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=23870, Unknown=0, NotChecked=0, Total=24180 [2019-09-03 20:14:42,577 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 156 states. [2019-09-03 20:14:56,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:14:56,691 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2019-09-03 20:14:56,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2019-09-03 20:14:56,692 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 161 [2019-09-03 20:14:56,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:14:56,693 INFO L225 Difference]: With dead ends: 169 [2019-09-03 20:14:56,693 INFO L226 Difference]: Without dead ends: 164 [2019-09-03 20:14:56,694 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=318, Invalid=24488, Unknown=0, NotChecked=0, Total=24806 [2019-09-03 20:14:56,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-09-03 20:14:56,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2019-09-03 20:14:56,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-09-03 20:14:56,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2019-09-03 20:14:56,703 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2019-09-03 20:14:56,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:14:56,703 INFO L475 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2019-09-03 20:14:56,703 INFO L476 AbstractCegarLoop]: Interpolant automaton has 156 states. [2019-09-03 20:14:56,703 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2019-09-03 20:14:56,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-09-03 20:14:56,704 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:14:56,704 INFO L399 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:14:56,704 INFO L418 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:14:56,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:14:56,705 INFO L82 PathProgramCache]: Analyzing trace with hash -602884761, now seen corresponding path program 76 times [2019-09-03 20:14:56,705 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:14:56,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:14:56,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:14:56,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:14:56,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:14:56,712 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:14:56,713 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:14:56,713 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 [2019-09-03 20:14:56,729 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:14:56,990 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:14:56,990 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:14:56,995 WARN L254 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 315 conjunts are in the unsatisfiable core [2019-09-03 20:14:56,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:15:07,871 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:15:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:15:08,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:15:08,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [158] total 158 [2019-09-03 20:15:08,180 INFO L454 AbstractCegarLoop]: Interpolant automaton has 158 states [2019-09-03 20:15:08,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2019-09-03 20:15:08,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=24492, Unknown=0, NotChecked=0, Total=24806 [2019-09-03 20:15:08,182 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 158 states.