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.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 03:06:36,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 03:06:36,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 03:06:36,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-08 03:06:36,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 03:06:36,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 03:06:36,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 03:06:36,704 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 [2019-09-08 03:06:36,721 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 03:06:36,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 03:06:36,723 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 03:06:36,723 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 03:06:36,723 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 03:06:36,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 03:06:36,723 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 03:06:36,724 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 03:06:36,724 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 03:06:36,724 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 03:06:36,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 03:06:36,725 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 03:06:36,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 03:06:36,725 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 03:06:36,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 03:06:36,725 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 03:06:36,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 03:06:36,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 03:06:36,727 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 03:06:36,727 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 03:06:36,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 03:06:36,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 03:06:36,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 03:06:36,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 03:06:36,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 03:06:36,728 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 03:06:36,728 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 03:06:36,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 03:06:36,729 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 03:06:36,760 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 03:06:36,771 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 03:06:36,775 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 03:06:36,776 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 03:06:36,776 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 03:06:36,777 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c [2019-09-08 03:06:36,834 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4ce4fda5/edc005402ead44fab00059209f5bb5b1/FLAG0d8bbf7b7 [2019-09-08 03:06:37,219 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 03:06:37,220 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c [2019-09-08 03:06:37,235 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4ce4fda5/edc005402ead44fab00059209f5bb5b1/FLAG0d8bbf7b7 [2019-09-08 03:06:37,597 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4ce4fda5/edc005402ead44fab00059209f5bb5b1 [2019-09-08 03:06:37,605 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 03:06:37,606 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 03:06:37,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 03:06:37,608 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 03:06:37,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 03:06:37,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 03:06:37" (1/1) ... [2019-09-08 03:06:37,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28334aa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:37, skipping insertion in model container [2019-09-08 03:06:37,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 03:06:37" (1/1) ... [2019-09-08 03:06:37,621 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 03:06:37,641 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 03:06:37,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 03:06:37,791 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 03:06:37,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 03:06:37,823 INFO L192 MainTranslator]: Completed translation [2019-09-08 03:06:37,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:37 WrapperNode [2019-09-08 03:06:37,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 03:06:37,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 03:06:37,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 03:06:37,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 03:06:37,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:37" (1/1) ... [2019-09-08 03:06:37,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:37" (1/1) ... [2019-09-08 03:06:37,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:37" (1/1) ... [2019-09-08 03:06:37,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:37" (1/1) ... [2019-09-08 03:06:37,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:37" (1/1) ... [2019-09-08 03:06:37,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:37" (1/1) ... [2019-09-08 03:06:37,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:37" (1/1) ... [2019-09-08 03:06:37,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 03:06:37,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 03:06:37,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 03:06:37,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 03:06:37,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:37" (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 [2019-09-08 03:06:37,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 03:06:37,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 03:06:37,998 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 03:06:37,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 03:06:37,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-08 03:06:37,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-08 03:06:37,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-08 03:06:37,999 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 03:06:37,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 03:06:37,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 03:06:38,219 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 03:06:38,220 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-08 03:06:38,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 03:06:38 BoogieIcfgContainer [2019-09-08 03:06:38,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 03:06:38,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 03:06:38,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 03:06:38,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 03:06:38,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 03:06:37" (1/3) ... [2019-09-08 03:06:38,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8957d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 03:06:38, skipping insertion in model container [2019-09-08 03:06:38,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:06:37" (2/3) ... [2019-09-08 03:06:38,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8957d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 03:06:38, skipping insertion in model container [2019-09-08 03:06:38,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 03:06:38" (3/3) ... [2019-09-08 03:06:38,231 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+lhb-reducer.c [2019-09-08 03:06:38,262 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 03:06:38,274 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 03:06:38,291 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 03:06:38,336 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 03:06:38,336 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 03:06:38,336 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 03:06:38,337 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 03:06:38,337 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 03:06:38,337 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 03:06:38,337 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 03:06:38,337 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 03:06:38,338 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 03:06:38,355 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-09-08 03:06:38,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-08 03:06:38,361 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:38,362 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:38,364 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:38,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:38,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1720236422, now seen corresponding path program 1 times [2019-09-08 03:06:38,372 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:38,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:38,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:38,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:38,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:38,459 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:38,460 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:38,460 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 [2019-09-08 03:06:38,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:06:38,509 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-08 03:06:38,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:38,680 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:38,711 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 03:06:38,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-09-08 03:06:38,716 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-08 03:06:38,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-08 03:06:38,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-09-08 03:06:38,733 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 9 states. [2019-09-08 03:06:38,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:38,956 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2019-09-08 03:06:38,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-08 03:06:38,958 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-09-08 03:06:38,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:38,971 INFO L225 Difference]: With dead ends: 41 [2019-09-08 03:06:38,971 INFO L226 Difference]: Without dead ends: 18 [2019-09-08 03:06:38,978 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-08 03:06:38,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-08 03:06:39,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-08 03:06:39,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-08 03:06:39,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-09-08 03:06:39,027 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2019-09-08 03:06:39,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:39,027 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-09-08 03:06:39,028 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-08 03:06:39,028 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-09-08 03:06:39,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-08 03:06:39,030 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:39,030 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:39,031 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:39,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:39,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1787659072, now seen corresponding path program 1 times [2019-09-08 03:06:39,032 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:39,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:39,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:39,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:39,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:39,059 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:39,059 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:39,059 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 [2019-09-08 03:06:39,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:06:39,105 WARN L254 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-08 03:06:39,108 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:39,226 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:39,260 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:39,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-08 03:06:39,262 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-08 03:06:39,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-08 03:06:39,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-09-08 03:06:39,266 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2019-09-08 03:06:39,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:39,380 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-09-08 03:06:39,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-08 03:06:39,381 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-09-08 03:06:39,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:39,383 INFO L225 Difference]: With dead ends: 22 [2019-09-08 03:06:39,383 INFO L226 Difference]: Without dead ends: 19 [2019-09-08 03:06:39,384 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-09-08 03:06:39,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-09-08 03:06:39,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-09-08 03:06:39,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-09-08 03:06:39,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-09-08 03:06:39,391 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2019-09-08 03:06:39,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:39,393 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-09-08 03:06:39,393 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-08 03:06:39,394 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-09-08 03:06:39,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-08 03:06:39,395 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:39,396 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:39,397 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:39,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:39,397 INFO L82 PathProgramCache]: Analyzing trace with hash -417206074, now seen corresponding path program 2 times [2019-09-08 03:06:39,397 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:39,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:39,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:39,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:39,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:39,431 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:39,431 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:39,431 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:39,449 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:06:39,474 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:06:39,475 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:39,476 WARN L254 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 39 conjunts are in the unsatisfiable core [2019-09-08 03:06:39,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:39,604 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:39,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:39,625 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:39,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-08 03:06:39,625 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-08 03:06:39,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-08 03:06:39,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-09-08 03:06:39,626 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2019-09-08 03:06:39,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:39,721 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-09-08 03:06:39,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 03:06:39,721 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2019-09-08 03:06:39,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:39,722 INFO L225 Difference]: With dead ends: 23 [2019-09-08 03:06:39,722 INFO L226 Difference]: Without dead ends: 20 [2019-09-08 03:06:39,723 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-09-08 03:06:39,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-09-08 03:06:39,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-09-08 03:06:39,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-08 03:06:39,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-09-08 03:06:39,728 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2019-09-08 03:06:39,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:39,728 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-09-08 03:06:39,728 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-08 03:06:39,728 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-09-08 03:06:39,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-08 03:06:39,729 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:39,729 INFO L399 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:39,730 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:39,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:39,730 INFO L82 PathProgramCache]: Analyzing trace with hash -48548864, now seen corresponding path program 3 times [2019-09-08 03:06:39,730 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:39,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:39,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:39,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:39,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:39,744 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:39,744 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:39,744 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:39,760 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:06:39,788 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-08 03:06:39,788 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:39,790 WARN L254 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 43 conjunts are in the unsatisfiable core [2019-09-08 03:06:39,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:39,916 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:39,936 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:39,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-09-08 03:06:39,937 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-08 03:06:39,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-08 03:06:39,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-09-08 03:06:39,938 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 12 states. [2019-09-08 03:06:40,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:40,078 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-09-08 03:06:40,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-08 03:06:40,079 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-09-08 03:06:40,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:40,080 INFO L225 Difference]: With dead ends: 24 [2019-09-08 03:06:40,080 INFO L226 Difference]: Without dead ends: 21 [2019-09-08 03:06:40,081 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2019-09-08 03:06:40,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-08 03:06:40,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-08 03:06:40,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-08 03:06:40,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-09-08 03:06:40,088 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2019-09-08 03:06:40,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:40,089 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-09-08 03:06:40,089 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-08 03:06:40,089 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-09-08 03:06:40,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-08 03:06:40,092 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:40,092 INFO L399 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:40,092 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:40,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:40,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1505077242, now seen corresponding path program 4 times [2019-09-08 03:06:40,093 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:40,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:40,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:40,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:40,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:40,118 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:40,118 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:40,119 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:40,136 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:06:40,237 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:06:40,238 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:40,239 WARN L254 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 47 conjunts are in the unsatisfiable core [2019-09-08 03:06:40,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:40,374 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:40,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:40,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-08 03:06:40,401 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 03:06:40,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 03:06:40,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-09-08 03:06:40,403 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 13 states. [2019-09-08 03:06:40,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:40,563 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-09-08 03:06:40,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-08 03:06:40,564 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2019-09-08 03:06:40,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:40,565 INFO L225 Difference]: With dead ends: 25 [2019-09-08 03:06:40,566 INFO L226 Difference]: Without dead ends: 22 [2019-09-08 03:06:40,566 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2019-09-08 03:06:40,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-08 03:06:40,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-09-08 03:06:40,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-08 03:06:40,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-09-08 03:06:40,571 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2019-09-08 03:06:40,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:40,572 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-09-08 03:06:40,572 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 03:06:40,572 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-09-08 03:06:40,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-08 03:06:40,573 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:40,573 INFO L399 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:40,573 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:40,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:40,574 INFO L82 PathProgramCache]: Analyzing trace with hash 587183296, now seen corresponding path program 5 times [2019-09-08 03:06:40,574 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:40,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:40,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:40,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:40,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:40,597 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:40,597 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:40,598 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 [2019-09-08 03:06:40,624 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:06:40,654 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-09-08 03:06:40,654 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:40,656 WARN L254 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 51 conjunts are in the unsatisfiable core [2019-09-08 03:06:40,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:40,798 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:40,820 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:40,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-08 03:06:40,821 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 03:06:40,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 03:06:40,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-09-08 03:06:40,822 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2019-09-08 03:06:40,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:40,966 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-09-08 03:06:40,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-08 03:06:40,967 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2019-09-08 03:06:40,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:40,968 INFO L225 Difference]: With dead ends: 26 [2019-09-08 03:06:40,968 INFO L226 Difference]: Without dead ends: 23 [2019-09-08 03:06:40,968 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-09-08 03:06:40,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-08 03:06:40,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-08 03:06:40,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-08 03:06:40,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-09-08 03:06:40,973 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2019-09-08 03:06:40,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:40,973 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-09-08 03:06:40,973 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 03:06:40,973 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-09-08 03:06:40,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-08 03:06:40,974 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:40,974 INFO L399 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:40,974 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:40,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:40,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1022750534, now seen corresponding path program 6 times [2019-09-08 03:06:40,975 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:40,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:40,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:40,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:40,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:40,986 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:40,986 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:40,986 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 [2019-09-08 03:06:41,010 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:06:41,037 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-09-08 03:06:41,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:41,039 WARN L254 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 55 conjunts are in the unsatisfiable core [2019-09-08 03:06:41,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:41,213 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:41,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:41,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-08 03:06:41,236 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-08 03:06:41,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-08 03:06:41,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-09-08 03:06:41,237 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 15 states. [2019-09-08 03:06:41,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:41,407 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-09-08 03:06:41,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-08 03:06:41,408 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2019-09-08 03:06:41,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:41,409 INFO L225 Difference]: With dead ends: 27 [2019-09-08 03:06:41,409 INFO L226 Difference]: Without dead ends: 24 [2019-09-08 03:06:41,409 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2019-09-08 03:06:41,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-08 03:06:41,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-08 03:06:41,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-08 03:06:41,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-09-08 03:06:41,414 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2019-09-08 03:06:41,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:41,414 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-09-08 03:06:41,414 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-08 03:06:41,415 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-09-08 03:06:41,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-08 03:06:41,415 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:41,415 INFO L399 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:41,416 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:41,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:41,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1640433024, now seen corresponding path program 7 times [2019-09-08 03:06:41,416 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:41,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:41,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:41,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:41,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:41,426 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:41,427 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:41,427 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 [2019-09-08 03:06:41,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:41,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:06:41,471 WARN L254 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2019-09-08 03:06:41,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:41,728 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:41,752 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:41,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:41,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-09-08 03:06:41,757 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-08 03:06:41,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-08 03:06:41,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2019-09-08 03:06:41,758 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 16 states. [2019-09-08 03:06:41,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:41,987 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-09-08 03:06:41,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 03:06:41,988 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2019-09-08 03:06:41,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:41,989 INFO L225 Difference]: With dead ends: 28 [2019-09-08 03:06:41,989 INFO L226 Difference]: Without dead ends: 25 [2019-09-08 03:06:41,990 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2019-09-08 03:06:41,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-08 03:06:41,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-09-08 03:06:42,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-09-08 03:06:42,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-09-08 03:06:42,000 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2019-09-08 03:06:42,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:42,001 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-09-08 03:06:42,001 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-08 03:06:42,001 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-09-08 03:06:42,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-08 03:06:42,002 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:42,002 INFO L399 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:42,002 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:42,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:42,002 INFO L82 PathProgramCache]: Analyzing trace with hash -686246266, now seen corresponding path program 8 times [2019-09-08 03:06:42,003 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:42,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:42,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:42,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:42,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:42,015 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:42,015 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:42,015 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) [2019-09-08 03:06:42,035 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:42,066 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:06:42,066 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:42,068 WARN L254 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 63 conjunts are in the unsatisfiable core [2019-09-08 03:06:42,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:42,297 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:42,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:42,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-09-08 03:06:42,319 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-08 03:06:42,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-08 03:06:42,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2019-09-08 03:06:42,320 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 17 states. [2019-09-08 03:06:42,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:42,530 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-09-08 03:06:42,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-08 03:06:42,531 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2019-09-08 03:06:42,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:42,531 INFO L225 Difference]: With dead ends: 29 [2019-09-08 03:06:42,531 INFO L226 Difference]: Without dead ends: 26 [2019-09-08 03:06:42,532 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-09-08 03:06:42,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-08 03:06:42,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-09-08 03:06:42,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-08 03:06:42,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-09-08 03:06:42,540 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2019-09-08 03:06:42,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:42,541 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-09-08 03:06:42,541 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-08 03:06:42,541 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-09-08 03:06:42,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-08 03:06:42,542 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:42,542 INFO L399 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:42,543 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:42,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:42,544 INFO L82 PathProgramCache]: Analyzing trace with hash 201139776, now seen corresponding path program 9 times [2019-09-08 03:06:42,544 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:42,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:42,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:42,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:42,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:42,567 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:42,568 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:42,568 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 [2019-09-08 03:06:42,581 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:06:42,616 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-08 03:06:42,616 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:42,617 WARN L254 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 67 conjunts are in the unsatisfiable core [2019-09-08 03:06:42,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:42,816 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:42,837 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:42,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:42,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-08 03:06:42,841 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-08 03:06:42,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-08 03:06:42,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2019-09-08 03:06:42,842 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2019-09-08 03:06:43,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:43,074 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-09-08 03:06:43,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-08 03:06:43,074 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2019-09-08 03:06:43,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:43,075 INFO L225 Difference]: With dead ends: 30 [2019-09-08 03:06:43,075 INFO L226 Difference]: Without dead ends: 27 [2019-09-08 03:06:43,076 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2019-09-08 03:06:43,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-08 03:06:43,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-09-08 03:06:43,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-08 03:06:43,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-09-08 03:06:43,082 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2019-09-08 03:06:43,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:43,082 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-09-08 03:06:43,082 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-08 03:06:43,082 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-09-08 03:06:43,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-08 03:06:43,084 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:43,084 INFO L399 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:43,085 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:43,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:43,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1940303302, now seen corresponding path program 10 times [2019-09-08 03:06:43,085 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:43,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:43,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:43,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:43,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:43,095 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:43,095 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:43,096 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:06:43,125 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:43,258 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:06:43,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:43,259 WARN L254 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 71 conjunts are in the unsatisfiable core [2019-09-08 03:06:43,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:43,495 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:43,514 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:43,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:43,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-08 03:06:43,518 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-08 03:06:43,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-08 03:06:43,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2019-09-08 03:06:43,519 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 19 states. [2019-09-08 03:06:43,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:43,758 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-09-08 03:06:43,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-08 03:06:43,759 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2019-09-08 03:06:43,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:43,760 INFO L225 Difference]: With dead ends: 31 [2019-09-08 03:06:43,760 INFO L226 Difference]: Without dead ends: 28 [2019-09-08 03:06:43,761 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2019-09-08 03:06:43,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-08 03:06:43,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-08 03:06:43,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-08 03:06:43,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-09-08 03:06:43,765 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2019-09-08 03:06:43,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:43,766 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-09-08 03:06:43,766 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-08 03:06:43,766 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-09-08 03:06:43,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-08 03:06:43,766 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:43,767 INFO L399 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:43,767 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:43,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:43,767 INFO L82 PathProgramCache]: Analyzing trace with hash 19797760, now seen corresponding path program 11 times [2019-09-08 03:06:43,767 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:43,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:43,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:43,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:43,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:43,776 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:43,777 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:43,777 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) [2019-09-08 03:06:43,802 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:43,832 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-09-08 03:06:43,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:43,834 WARN L254 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 75 conjunts are in the unsatisfiable core [2019-09-08 03:06:43,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:44,106 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:44,147 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:44,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:44,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-09-08 03:06:44,152 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-08 03:06:44,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-08 03:06:44,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2019-09-08 03:06:44,152 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 20 states. [2019-09-08 03:06:44,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:44,536 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-09-08 03:06:44,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-08 03:06:44,537 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2019-09-08 03:06:44,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:44,538 INFO L225 Difference]: With dead ends: 32 [2019-09-08 03:06:44,538 INFO L226 Difference]: Without dead ends: 29 [2019-09-08 03:06:44,539 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2019-09-08 03:06:44,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-08 03:06:44,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-09-08 03:06:44,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-08 03:06:44,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-09-08 03:06:44,548 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2019-09-08 03:06:44,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:44,548 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-09-08 03:06:44,548 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-08 03:06:44,549 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-09-08 03:06:44,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-08 03:06:44,552 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:44,553 INFO L399 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:44,554 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:44,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:44,555 INFO L82 PathProgramCache]: Analyzing trace with hash 613668102, now seen corresponding path program 12 times [2019-09-08 03:06:44,555 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:44,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:44,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:44,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:44,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:44,578 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:44,578 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:44,578 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 [2019-09-08 03:06:44,601 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:06:44,698 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-08 03:06:44,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:44,701 WARN L254 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 83 conjunts are in the unsatisfiable core [2019-09-08 03:06:44,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:45,190 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:45,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:45,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-09-08 03:06:45,224 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-08 03:06:45,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-08 03:06:45,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2019-09-08 03:06:45,225 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 22 states. [2019-09-08 03:06:45,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:45,552 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-09-08 03:06:45,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-08 03:06:45,552 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2019-09-08 03:06:45,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:45,553 INFO L225 Difference]: With dead ends: 33 [2019-09-08 03:06:45,553 INFO L226 Difference]: Without dead ends: 30 [2019-09-08 03:06:45,554 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2019-09-08 03:06:45,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-08 03:06:45,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-08 03:06:45,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-08 03:06:45,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-09-08 03:06:45,558 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2019-09-08 03:06:45,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:45,559 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-09-08 03:06:45,559 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-08 03:06:45,559 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-09-08 03:06:45,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-08 03:06:45,560 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:45,560 INFO L399 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:45,560 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:45,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:45,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1843779520, now seen corresponding path program 13 times [2019-09-08 03:06:45,560 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:45,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:45,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:45,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:45,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:45,569 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:45,570 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:45,570 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) [2019-09-08 03:06:45,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:45,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:06:45,615 WARN L254 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 83 conjunts are in the unsatisfiable core [2019-09-08 03:06:45,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:45,895 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:45,915 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:45,918 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:45,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-09-08 03:06:45,918 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-08 03:06:45,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-08 03:06:45,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2019-09-08 03:06:45,919 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 22 states. [2019-09-08 03:06:46,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:46,262 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-09-08 03:06:46,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-08 03:06:46,262 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2019-09-08 03:06:46,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:46,262 INFO L225 Difference]: With dead ends: 34 [2019-09-08 03:06:46,263 INFO L226 Difference]: Without dead ends: 31 [2019-09-08 03:06:46,263 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2019-09-08 03:06:46,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-08 03:06:46,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-09-08 03:06:46,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-08 03:06:46,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-09-08 03:06:46,268 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2019-09-08 03:06:46,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:46,268 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-09-08 03:06:46,268 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-08 03:06:46,268 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-09-08 03:06:46,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-08 03:06:46,269 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:46,269 INFO L399 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:46,269 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:46,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:46,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1322527814, now seen corresponding path program 14 times [2019-09-08 03:06:46,270 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:46,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:46,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:46,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:46,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:46,280 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:46,280 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:46,280 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 [2019-09-08 03:06:46,297 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:06:46,333 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:06:46,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:46,335 WARN L254 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 87 conjunts are in the unsatisfiable core [2019-09-08 03:06:46,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:46,632 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:46,658 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:46,661 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:46,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-09-08 03:06:46,661 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-08 03:06:46,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-08 03:06:46,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2019-09-08 03:06:46,662 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 23 states. [2019-09-08 03:06:47,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:47,019 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-09-08 03:06:47,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-08 03:06:47,019 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2019-09-08 03:06:47,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:47,020 INFO L225 Difference]: With dead ends: 35 [2019-09-08 03:06:47,020 INFO L226 Difference]: Without dead ends: 32 [2019-09-08 03:06:47,021 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2019-09-08 03:06:47,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-08 03:06:47,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-09-08 03:06:47,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-08 03:06:47,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-09-08 03:06:47,026 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2019-09-08 03:06:47,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:47,027 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-09-08 03:06:47,027 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-08 03:06:47,027 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-09-08 03:06:47,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-08 03:06:47,028 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:47,028 INFO L399 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:47,028 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:47,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:47,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1951373184, now seen corresponding path program 15 times [2019-09-08 03:06:47,028 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:47,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:47,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:47,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:47,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:47,038 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:47,038 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:47,038 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:06:47,061 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:47,195 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-08 03:06:47,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:47,197 WARN L254 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 91 conjunts are in the unsatisfiable core [2019-09-08 03:06:47,198 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:47,547 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:47,570 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:47,573 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:47,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-08 03:06:47,574 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-08 03:06:47,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-08 03:06:47,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2019-09-08 03:06:47,575 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 24 states. [2019-09-08 03:06:47,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:47,982 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-09-08 03:06:47,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-08 03:06:47,982 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2019-09-08 03:06:47,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:47,983 INFO L225 Difference]: With dead ends: 36 [2019-09-08 03:06:47,983 INFO L226 Difference]: Without dead ends: 33 [2019-09-08 03:06:47,984 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2019-09-08 03:06:47,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-08 03:06:47,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-09-08 03:06:47,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-08 03:06:47,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-09-08 03:06:47,991 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2019-09-08 03:06:47,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:47,991 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-09-08 03:06:47,991 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-08 03:06:47,991 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-09-08 03:06:47,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-08 03:06:47,995 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:47,995 INFO L399 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:47,996 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:47,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:47,996 INFO L82 PathProgramCache]: Analyzing trace with hash -363089018, now seen corresponding path program 16 times [2019-09-08 03:06:47,996 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:47,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:47,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:47,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:47,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:48,006 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:48,007 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:48,007 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-08 03:06:48,018 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:06:48,167 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:06:48,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:48,169 WARN L254 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 95 conjunts are in the unsatisfiable core [2019-09-08 03:06:48,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:48,564 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:48,589 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:48,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:48,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-09-08 03:06:48,592 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-08 03:06:48,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-08 03:06:48,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-09-08 03:06:48,593 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 25 states. [2019-09-08 03:06:49,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:49,018 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2019-09-08 03:06:49,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-08 03:06:49,019 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2019-09-08 03:06:49,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:49,020 INFO L225 Difference]: With dead ends: 37 [2019-09-08 03:06:49,020 INFO L226 Difference]: Without dead ends: 34 [2019-09-08 03:06:49,021 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2019-09-08 03:06:49,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-08 03:06:49,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-09-08 03:06:49,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-08 03:06:49,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-09-08 03:06:49,026 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2019-09-08 03:06:49,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:49,026 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-09-08 03:06:49,026 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-08 03:06:49,027 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-09-08 03:06:49,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-09-08 03:06:49,027 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:49,027 INFO L399 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:49,027 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:49,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:49,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1629079872, now seen corresponding path program 17 times [2019-09-08 03:06:49,028 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:49,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:49,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:49,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:49,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:49,036 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:49,036 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:49,036 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:06:49,057 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:49,097 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-09-08 03:06:49,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:49,100 WARN L254 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 99 conjunts are in the unsatisfiable core [2019-09-08 03:06:49,101 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:49,462 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:49,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:49,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-09-08 03:06:49,492 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-08 03:06:49,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-08 03:06:49,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2019-09-08 03:06:49,493 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 26 states. [2019-09-08 03:06:49,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:49,937 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2019-09-08 03:06:49,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-08 03:06:49,937 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 33 [2019-09-08 03:06:49,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:49,938 INFO L225 Difference]: With dead ends: 38 [2019-09-08 03:06:49,938 INFO L226 Difference]: Without dead ends: 35 [2019-09-08 03:06:49,939 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2019-09-08 03:06:49,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-08 03:06:49,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-09-08 03:06:49,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-08 03:06:49,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-09-08 03:06:49,943 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2019-09-08 03:06:49,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:49,943 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-09-08 03:06:49,943 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-08 03:06:49,944 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-09-08 03:06:49,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-08 03:06:49,944 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:49,944 INFO L399 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:49,945 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:49,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:49,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1038193978, now seen corresponding path program 18 times [2019-09-08 03:06:49,945 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:49,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:49,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:49,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:49,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:49,954 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:49,954 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:49,954 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) [2019-09-08 03:06:49,967 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:50,048 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-09-08 03:06:50,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:50,049 WARN L254 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 103 conjunts are in the unsatisfiable core [2019-09-08 03:06:50,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:50,421 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:50,451 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:50,454 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:50,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-09-08 03:06:50,455 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-08 03:06:50,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-08 03:06:50,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2019-09-08 03:06:50,456 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 27 states. [2019-09-08 03:06:50,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:50,956 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-09-08 03:06:50,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-08 03:06:50,957 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2019-09-08 03:06:50,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:50,957 INFO L225 Difference]: With dead ends: 39 [2019-09-08 03:06:50,957 INFO L226 Difference]: Without dead ends: 36 [2019-09-08 03:06:50,958 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2019-09-08 03:06:50,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-08 03:06:50,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-09-08 03:06:50,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-08 03:06:50,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-09-08 03:06:50,963 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2019-09-08 03:06:50,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:50,964 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-09-08 03:06:50,964 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-08 03:06:50,964 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-09-08 03:06:50,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-08 03:06:50,965 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:50,965 INFO L399 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:50,965 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:50,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:50,967 INFO L82 PathProgramCache]: Analyzing trace with hash -2119304704, now seen corresponding path program 19 times [2019-09-08 03:06:50,967 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:50,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:50,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:50,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:50,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:50,979 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:50,983 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:50,983 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-08 03:06:50,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:06:51,027 WARN L254 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 107 conjunts are in the unsatisfiable core [2019-09-08 03:06:51,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:51,461 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:51,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:51,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-09-08 03:06:51,493 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-08 03:06:51,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-08 03:06:51,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2019-09-08 03:06:51,494 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 28 states. [2019-09-08 03:06:52,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:52,014 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-09-08 03:06:52,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-08 03:06:52,014 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2019-09-08 03:06:52,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:52,015 INFO L225 Difference]: With dead ends: 40 [2019-09-08 03:06:52,015 INFO L226 Difference]: Without dead ends: 37 [2019-09-08 03:06:52,016 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2019-09-08 03:06:52,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-08 03:06:52,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-09-08 03:06:52,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-08 03:06:52,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-09-08 03:06:52,021 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2019-09-08 03:06:52,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:52,021 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-09-08 03:06:52,022 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-08 03:06:52,022 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-09-08 03:06:52,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-08 03:06:52,022 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:52,022 INFO L399 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:52,023 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:52,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:52,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1273998842, now seen corresponding path program 20 times [2019-09-08 03:06:52,023 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:52,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:52,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:52,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:52,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:52,031 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:52,031 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:52,031 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-08 03:06:52,050 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:06:52,088 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:06:52,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:52,090 WARN L254 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 111 conjunts are in the unsatisfiable core [2019-09-08 03:06:52,092 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:52,488 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:52,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:52,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-09-08 03:06:52,519 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-08 03:06:52,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-08 03:06:52,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2019-09-08 03:06:52,520 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 29 states. [2019-09-08 03:06:53,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:53,061 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2019-09-08 03:06:53,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-08 03:06:53,061 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 36 [2019-09-08 03:06:53,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:53,062 INFO L225 Difference]: With dead ends: 41 [2019-09-08 03:06:53,062 INFO L226 Difference]: Without dead ends: 38 [2019-09-08 03:06:53,063 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2019-09-08 03:06:53,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-08 03:06:53,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-09-08 03:06:53,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-08 03:06:53,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-09-08 03:06:53,068 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2019-09-08 03:06:53,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:53,068 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-09-08 03:06:53,068 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-08 03:06:53,068 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-09-08 03:06:53,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-08 03:06:53,069 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:53,069 INFO L399 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:53,069 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:53,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:53,070 INFO L82 PathProgramCache]: Analyzing trace with hash -839320896, now seen corresponding path program 21 times [2019-09-08 03:06:53,070 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:53,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:53,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:53,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:53,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:53,078 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:53,078 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:53,078 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:06:53,101 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:53,383 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-08 03:06:53,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:53,385 WARN L254 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 115 conjunts are in the unsatisfiable core [2019-09-08 03:06:53,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:53,836 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:53,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:53,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-09-08 03:06:53,869 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-08 03:06:53,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-08 03:06:53,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2019-09-08 03:06:53,870 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 30 states. [2019-09-08 03:06:54,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:54,441 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-09-08 03:06:54,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-08 03:06:54,444 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2019-09-08 03:06:54,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:54,445 INFO L225 Difference]: With dead ends: 42 [2019-09-08 03:06:54,445 INFO L226 Difference]: Without dead ends: 39 [2019-09-08 03:06:54,446 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2019-09-08 03:06:54,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-08 03:06:54,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-09-08 03:06:54,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-08 03:06:54,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-09-08 03:06:54,451 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2019-09-08 03:06:54,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:54,451 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-09-08 03:06:54,451 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-08 03:06:54,451 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-09-08 03:06:54,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-08 03:06:54,452 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:54,452 INFO L399 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:54,452 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:54,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:54,452 INFO L82 PathProgramCache]: Analyzing trace with hash -249206458, now seen corresponding path program 22 times [2019-09-08 03:06:54,453 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:54,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:54,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:54,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:54,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:54,460 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:54,461 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:54,461 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) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:54,484 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:06:54,686 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:06:54,687 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:54,689 WARN L254 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 119 conjunts are in the unsatisfiable core [2019-09-08 03:06:54,690 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:55,189 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:55,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:55,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-09-08 03:06:55,224 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-08 03:06:55,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-08 03:06:55,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2019-09-08 03:06:55,225 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 31 states. [2019-09-08 03:06:55,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:55,851 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-09-08 03:06:55,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-08 03:06:55,852 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2019-09-08 03:06:55,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:55,853 INFO L225 Difference]: With dead ends: 43 [2019-09-08 03:06:55,853 INFO L226 Difference]: Without dead ends: 40 [2019-09-08 03:06:55,854 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2019-09-08 03:06:55,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-08 03:06:55,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-09-08 03:06:55,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-08 03:06:55,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-09-08 03:06:55,859 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2019-09-08 03:06:55,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:55,859 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-09-08 03:06:55,859 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-08 03:06:55,859 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-09-08 03:06:55,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-08 03:06:55,860 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:55,860 INFO L399 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:55,860 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:55,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:55,861 INFO L82 PathProgramCache]: Analyzing trace with hash 864471936, now seen corresponding path program 23 times [2019-09-08 03:06:55,861 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:55,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:55,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:55,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:55,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:55,868 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:55,868 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:55,869 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 [2019-09-08 03:06:55,881 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:06:55,930 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-09-08 03:06:55,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:55,932 WARN L254 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 123 conjunts are in the unsatisfiable core [2019-09-08 03:06:55,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:56,419 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:56,450 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:56,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:56,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-09-08 03:06:56,454 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-08 03:06:56,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-08 03:06:56,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2019-09-08 03:06:56,455 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 32 states. [2019-09-08 03:06:57,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:57,130 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2019-09-08 03:06:57,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-08 03:06:57,131 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 39 [2019-09-08 03:06:57,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:57,131 INFO L225 Difference]: With dead ends: 44 [2019-09-08 03:06:57,131 INFO L226 Difference]: Without dead ends: 41 [2019-09-08 03:06:57,132 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2019-09-08 03:06:57,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-09-08 03:06:57,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-09-08 03:06:57,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-08 03:06:57,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-09-08 03:06:57,136 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2019-09-08 03:06:57,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:57,137 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-09-08 03:06:57,137 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-08 03:06:57,137 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-09-08 03:06:57,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-08 03:06:57,137 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:57,137 INFO L399 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:57,137 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:57,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:57,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1028763782, now seen corresponding path program 24 times [2019-09-08 03:06:57,138 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:57,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:57,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:57,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:57,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:57,145 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:57,145 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:57,146 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:06:57,163 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:57,257 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-08 03:06:57,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:57,260 WARN L254 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 127 conjunts are in the unsatisfiable core [2019-09-08 03:06:57,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:57,836 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:57,874 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:57,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-09-08 03:06:57,874 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-08 03:06:57,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-08 03:06:57,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2019-09-08 03:06:57,875 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 33 states. [2019-09-08 03:06:58,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:58,587 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-09-08 03:06:58,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-08 03:06:58,587 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2019-09-08 03:06:58,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:58,588 INFO L225 Difference]: With dead ends: 45 [2019-09-08 03:06:58,589 INFO L226 Difference]: Without dead ends: 42 [2019-09-08 03:06:58,590 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2019-09-08 03:06:58,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-08 03:06:58,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-09-08 03:06:58,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-08 03:06:58,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2019-09-08 03:06:58,594 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2019-09-08 03:06:58,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:58,594 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2019-09-08 03:06:58,594 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-08 03:06:58,594 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2019-09-08 03:06:58,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-08 03:06:58,595 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:58,595 INFO L399 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:58,595 INFO L418 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:58,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:58,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1826843712, now seen corresponding path program 25 times [2019-09-08 03:06:58,595 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:58,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:58,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:58,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:58,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:58,608 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:06:58,609 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:06:58,609 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) [2019-09-08 03:06:58,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:06:58,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:06:58,682 WARN L254 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 131 conjunts are in the unsatisfiable core [2019-09-08 03:06:58,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:59,269 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:06:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:59,305 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:06:59,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-09-08 03:06:59,306 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-08 03:06:59,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-08 03:06:59,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2019-09-08 03:06:59,307 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 34 states. [2019-09-08 03:07:00,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:00,057 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2019-09-08 03:07:00,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-08 03:07:00,058 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 41 [2019-09-08 03:07:00,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:00,059 INFO L225 Difference]: With dead ends: 46 [2019-09-08 03:07:00,059 INFO L226 Difference]: Without dead ends: 43 [2019-09-08 03:07:00,060 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2019-09-08 03:07:00,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-08 03:07:00,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-09-08 03:07:00,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-08 03:07:00,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-09-08 03:07:00,072 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2019-09-08 03:07:00,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:00,072 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-09-08 03:07:00,072 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-08 03:07:00,072 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-09-08 03:07:00,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-08 03:07:00,073 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:00,073 INFO L399 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:00,073 INFO L418 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:00,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:00,074 INFO L82 PathProgramCache]: Analyzing trace with hash 797517766, now seen corresponding path program 26 times [2019-09-08 03:07:00,074 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:00,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:00,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:00,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:07:00,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:00,085 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:00,085 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:00,085 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 [2019-09-08 03:07:00,098 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:07:00,171 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:07:00,172 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:00,175 WARN L254 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 135 conjunts are in the unsatisfiable core [2019-09-08 03:07:00,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:00,940 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:00,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:00,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-09-08 03:07:00,987 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-08 03:07:00,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-08 03:07:00,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2019-09-08 03:07:00,988 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 35 states. [2019-09-08 03:07:01,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:01,781 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-09-08 03:07:01,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-08 03:07:01,782 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 42 [2019-09-08 03:07:01,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:01,783 INFO L225 Difference]: With dead ends: 47 [2019-09-08 03:07:01,783 INFO L226 Difference]: Without dead ends: 44 [2019-09-08 03:07:01,784 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2019-09-08 03:07:01,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-08 03:07:01,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-09-08 03:07:01,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-08 03:07:01,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-09-08 03:07:01,788 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2019-09-08 03:07:01,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:01,788 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-09-08 03:07:01,788 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-08 03:07:01,788 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-09-08 03:07:01,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-08 03:07:01,788 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:01,789 INFO L399 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:01,789 INFO L418 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:01,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:01,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1046815488, now seen corresponding path program 27 times [2019-09-08 03:07:01,789 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:01,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:01,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:01,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:01,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:01,797 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:01,797 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:01,797 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 [2019-09-08 03:07:01,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:07:02,369 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-09-08 03:07:02,370 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:02,372 WARN L254 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 139 conjunts are in the unsatisfiable core [2019-09-08 03:07:02,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:02,986 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:03,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:03,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-09-08 03:07:03,025 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-08 03:07:03,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-08 03:07:03,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2019-09-08 03:07:03,026 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 36 states. [2019-09-08 03:07:03,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:03,863 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-09-08 03:07:03,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-08 03:07:03,863 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2019-09-08 03:07:03,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:03,864 INFO L225 Difference]: With dead ends: 48 [2019-09-08 03:07:03,864 INFO L226 Difference]: Without dead ends: 45 [2019-09-08 03:07:03,865 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2019-09-08 03:07:03,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-08 03:07:03,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-09-08 03:07:03,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-08 03:07:03,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-09-08 03:07:03,869 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2019-09-08 03:07:03,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:03,870 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-09-08 03:07:03,870 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-08 03:07:03,870 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-09-08 03:07:03,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-08 03:07:03,870 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:03,870 INFO L399 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:03,870 INFO L418 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:03,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:03,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1908395782, now seen corresponding path program 28 times [2019-09-08 03:07:03,871 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:03,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:03,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:03,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:03,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:03,877 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:03,877 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:03,877 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 [2019-09-08 03:07:03,892 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:07:04,151 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:07:04,152 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:04,154 WARN L254 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 143 conjunts are in the unsatisfiable core [2019-09-08 03:07:04,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:04,842 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:04,895 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:04,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:04,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2019-09-08 03:07:04,900 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-08 03:07:04,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-08 03:07:04,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2019-09-08 03:07:04,901 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 37 states. [2019-09-08 03:07:05,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:05,808 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-09-08 03:07:05,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-08 03:07:05,809 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2019-09-08 03:07:05,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:05,809 INFO L225 Difference]: With dead ends: 49 [2019-09-08 03:07:05,809 INFO L226 Difference]: Without dead ends: 46 [2019-09-08 03:07:05,810 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2019-09-08 03:07:05,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-09-08 03:07:05,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-09-08 03:07:05,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-09-08 03:07:05,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-09-08 03:07:05,815 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2019-09-08 03:07:05,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:05,815 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-09-08 03:07:05,815 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-08 03:07:05,816 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-09-08 03:07:05,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-09-08 03:07:05,816 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:05,816 INFO L399 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:05,816 INFO L418 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:05,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:05,817 INFO L82 PathProgramCache]: Analyzing trace with hash -969335360, now seen corresponding path program 29 times [2019-09-08 03:07:05,817 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:05,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:05,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:05,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:05,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:05,825 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:05,825 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:05,825 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:05,838 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:07:05,897 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-09-08 03:07:05,897 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:05,900 WARN L254 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 147 conjunts are in the unsatisfiable core [2019-09-08 03:07:05,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:06,605 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:06,649 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:06,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:06,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-09-08 03:07:06,653 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-08 03:07:06,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-08 03:07:06,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2019-09-08 03:07:06,654 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 38 states. [2019-09-08 03:07:07,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:07,598 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2019-09-08 03:07:07,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-08 03:07:07,598 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 45 [2019-09-08 03:07:07,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:07,599 INFO L225 Difference]: With dead ends: 50 [2019-09-08 03:07:07,599 INFO L226 Difference]: Without dead ends: 47 [2019-09-08 03:07:07,600 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2019-09-08 03:07:07,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-09-08 03:07:07,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-09-08 03:07:07,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-08 03:07:07,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2019-09-08 03:07:07,604 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2019-09-08 03:07:07,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:07,605 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2019-09-08 03:07:07,605 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-08 03:07:07,605 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2019-09-08 03:07:07,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-08 03:07:07,605 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:07,605 INFO L399 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:07,605 INFO L418 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:07,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:07,606 INFO L82 PathProgramCache]: Analyzing trace with hash 15312454, now seen corresponding path program 30 times [2019-09-08 03:07:07,606 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:07,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:07,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:07,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:07,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:07,613 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:07,613 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:07,613 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) [2019-09-08 03:07:07,630 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:07,879 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-09-08 03:07:07,880 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:07,883 WARN L254 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 151 conjunts are in the unsatisfiable core [2019-09-08 03:07:07,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:08,786 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:08,845 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:08,849 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:08,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2019-09-08 03:07:08,849 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-08 03:07:08,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-08 03:07:08,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2019-09-08 03:07:08,851 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 39 states. [2019-09-08 03:07:09,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:09,806 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-09-08 03:07:09,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-09-08 03:07:09,806 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 46 [2019-09-08 03:07:09,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:09,807 INFO L225 Difference]: With dead ends: 51 [2019-09-08 03:07:09,807 INFO L226 Difference]: Without dead ends: 48 [2019-09-08 03:07:09,808 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2019-09-08 03:07:09,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-08 03:07:09,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-09-08 03:07:09,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-08 03:07:09,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-09-08 03:07:09,817 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2019-09-08 03:07:09,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:09,817 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-09-08 03:07:09,817 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-08 03:07:09,817 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-09-08 03:07:09,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-08 03:07:09,818 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:09,818 INFO L399 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:09,818 INFO L418 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:09,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:09,819 INFO L82 PathProgramCache]: Analyzing trace with hash 474623616, now seen corresponding path program 31 times [2019-09-08 03:07:09,819 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:09,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:09,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:09,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:09,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:09,833 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:09,833 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:09,833 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:09,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:07:09,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:07:09,897 WARN L254 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 155 conjunts are in the unsatisfiable core [2019-09-08 03:07:09,899 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:10,668 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:10,709 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:10,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-09-08 03:07:10,710 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-09-08 03:07:10,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-09-08 03:07:10,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2019-09-08 03:07:10,711 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 40 states. [2019-09-08 03:07:11,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:11,755 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2019-09-08 03:07:11,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-09-08 03:07:11,756 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 47 [2019-09-08 03:07:11,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:11,757 INFO L225 Difference]: With dead ends: 52 [2019-09-08 03:07:11,757 INFO L226 Difference]: Without dead ends: 49 [2019-09-08 03:07:11,758 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2019-09-08 03:07:11,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-08 03:07:11,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-09-08 03:07:11,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-09-08 03:07:11,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-09-08 03:07:11,763 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2019-09-08 03:07:11,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:11,763 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-09-08 03:07:11,763 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-09-08 03:07:11,763 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-09-08 03:07:11,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-09-08 03:07:11,764 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:11,764 INFO L399 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:11,764 INFO L418 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:11,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:11,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1828367750, now seen corresponding path program 32 times [2019-09-08 03:07:11,765 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:11,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:11,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:11,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:07:11,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:11,772 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:11,772 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:11,772 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) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:11,793 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:07:11,851 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:07:11,851 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:11,854 WARN L254 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 159 conjunts are in the unsatisfiable core [2019-09-08 03:07:11,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:12,632 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:12,688 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 03:07:12,692 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:12,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2019-09-08 03:07:12,692 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-09-08 03:07:12,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-09-08 03:07:12,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2019-09-08 03:07:12,694 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 41 states. [2019-09-08 03:07:13,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:13,832 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2019-09-08 03:07:13,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-09-08 03:07:13,832 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 48 [2019-09-08 03:07:13,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:13,833 INFO L225 Difference]: With dead ends: 53 [2019-09-08 03:07:13,833 INFO L226 Difference]: Without dead ends: 50 [2019-09-08 03:07:13,834 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2019-09-08 03:07:13,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-08 03:07:13,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-09-08 03:07:13,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-09-08 03:07:13,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2019-09-08 03:07:13,838 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2019-09-08 03:07:13,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:13,838 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2019-09-08 03:07:13,838 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-09-08 03:07:13,838 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2019-09-08 03:07:13,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-08 03:07:13,839 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:13,839 INFO L399 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:13,839 INFO L418 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:13,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:13,840 INFO L82 PathProgramCache]: Analyzing trace with hash 844762944, now seen corresponding path program 33 times [2019-09-08 03:07:13,840 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:13,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:13,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:13,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:13,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:13,847 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:13,848 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:13,848 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:07:13,870 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:15,092 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-09-08 03:07:15,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:15,095 WARN L254 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 163 conjunts are in the unsatisfiable core [2019-09-08 03:07:15,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:15,904 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:15,945 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:15,948 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:15,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2019-09-08 03:07:15,948 INFO L454 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-09-08 03:07:15,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-09-08 03:07:15,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2019-09-08 03:07:15,950 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 42 states. [2019-09-08 03:07:17,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:17,095 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-09-08 03:07:17,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-09-08 03:07:17,095 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 49 [2019-09-08 03:07:17,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:17,096 INFO L225 Difference]: With dead ends: 54 [2019-09-08 03:07:17,096 INFO L226 Difference]: Without dead ends: 51 [2019-09-08 03:07:17,097 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2019-09-08 03:07:17,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-08 03:07:17,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-09-08 03:07:17,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-08 03:07:17,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2019-09-08 03:07:17,103 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2019-09-08 03:07:17,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:17,103 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2019-09-08 03:07:17,103 INFO L476 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-09-08 03:07:17,103 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2019-09-08 03:07:17,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-09-08 03:07:17,104 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:17,104 INFO L399 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:17,104 INFO L418 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:17,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:17,104 INFO L82 PathProgramCache]: Analyzing trace with hash 417785030, now seen corresponding path program 34 times [2019-09-08 03:07:17,104 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:17,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:17,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:17,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:17,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:17,112 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:17,112 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:17,112 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 [2019-09-08 03:07:17,134 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:07:17,466 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:07:17,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:17,470 WARN L254 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 167 conjunts are in the unsatisfiable core [2019-09-08 03:07:17,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:18,339 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:18,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:18,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2019-09-08 03:07:18,382 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-09-08 03:07:18,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-09-08 03:07:18,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2019-09-08 03:07:18,382 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 43 states. [2019-09-08 03:07:19,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:19,587 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2019-09-08 03:07:19,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-09-08 03:07:19,587 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 50 [2019-09-08 03:07:19,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:19,588 INFO L225 Difference]: With dead ends: 55 [2019-09-08 03:07:19,588 INFO L226 Difference]: Without dead ends: 52 [2019-09-08 03:07:19,589 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=1805, Unknown=0, NotChecked=0, Total=1892 [2019-09-08 03:07:19,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-08 03:07:19,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-09-08 03:07:19,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-08 03:07:19,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2019-09-08 03:07:19,595 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2019-09-08 03:07:19,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:19,595 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2019-09-08 03:07:19,595 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-09-08 03:07:19,596 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2019-09-08 03:07:19,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-08 03:07:19,596 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:19,596 INFO L399 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:19,596 INFO L418 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:19,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:19,597 INFO L82 PathProgramCache]: Analyzing trace with hash 66371584, now seen corresponding path program 35 times [2019-09-08 03:07:19,597 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:19,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:19,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:19,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:19,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:19,604 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:19,604 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:19,604 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 [2019-09-08 03:07:19,620 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:07:19,696 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-09-08 03:07:19,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:19,701 WARN L254 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 171 conjunts are in the unsatisfiable core [2019-09-08 03:07:19,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:20,598 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:20,642 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:20,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:20,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2019-09-08 03:07:20,646 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-09-08 03:07:20,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-09-08 03:07:20,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2019-09-08 03:07:20,647 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 44 states. [2019-09-08 03:07:21,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:21,911 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2019-09-08 03:07:21,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-08 03:07:21,911 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 51 [2019-09-08 03:07:21,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:21,912 INFO L225 Difference]: With dead ends: 56 [2019-09-08 03:07:21,912 INFO L226 Difference]: Without dead ends: 53 [2019-09-08 03:07:21,914 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2019-09-08 03:07:21,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-08 03:07:21,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-09-08 03:07:21,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-09-08 03:07:21,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2019-09-08 03:07:21,919 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2019-09-08 03:07:21,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:21,920 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2019-09-08 03:07:21,920 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-09-08 03:07:21,920 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2019-09-08 03:07:21,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-08 03:07:21,920 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:21,920 INFO L399 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:21,921 INFO L418 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:21,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:21,921 INFO L82 PathProgramCache]: Analyzing trace with hash 2057456646, now seen corresponding path program 36 times [2019-09-08 03:07:21,921 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:21,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:21,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:21,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:21,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:21,928 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:21,929 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:21,929 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 [2019-09-08 03:07:21,956 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:07:22,403 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-08 03:07:22,403 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:22,407 WARN L254 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 175 conjunts are in the unsatisfiable core [2019-09-08 03:07:22,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:23,346 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:23,410 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:23,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:23,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2019-09-08 03:07:23,414 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-09-08 03:07:23,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-09-08 03:07:23,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2019-09-08 03:07:23,415 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 45 states. [2019-09-08 03:07:24,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:24,741 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2019-09-08 03:07:24,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-09-08 03:07:24,741 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 52 [2019-09-08 03:07:24,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:24,742 INFO L225 Difference]: With dead ends: 57 [2019-09-08 03:07:24,743 INFO L226 Difference]: Without dead ends: 54 [2019-09-08 03:07:24,744 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2019-09-08 03:07:24,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-08 03:07:24,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-09-08 03:07:24,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-08 03:07:24,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2019-09-08 03:07:24,750 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2019-09-08 03:07:24,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:24,750 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2019-09-08 03:07:24,750 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-09-08 03:07:24,750 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2019-09-08 03:07:24,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-09-08 03:07:24,751 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:24,751 INFO L399 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:24,751 INFO L418 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:24,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:24,751 INFO L82 PathProgramCache]: Analyzing trace with hash -643415872, now seen corresponding path program 37 times [2019-09-08 03:07:24,752 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:24,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:24,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:24,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:24,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:24,759 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:24,759 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:24,760 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-08 03:07:24,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:07:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:07:24,842 WARN L254 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 179 conjunts are in the unsatisfiable core [2019-09-08 03:07:24,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:25,816 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:25,861 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:25,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2019-09-08 03:07:25,861 INFO L454 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-09-08 03:07:25,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-09-08 03:07:25,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2019-09-08 03:07:25,862 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 46 states. [2019-09-08 03:07:27,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:27,227 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2019-09-08 03:07:27,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-09-08 03:07:27,228 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 53 [2019-09-08 03:07:27,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:27,229 INFO L225 Difference]: With dead ends: 58 [2019-09-08 03:07:27,229 INFO L226 Difference]: Without dead ends: 55 [2019-09-08 03:07:27,230 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=2069, Unknown=0, NotChecked=0, Total=2162 [2019-09-08 03:07:27,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-08 03:07:27,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-09-08 03:07:27,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-09-08 03:07:27,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2019-09-08 03:07:27,235 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2019-09-08 03:07:27,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:27,236 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2019-09-08 03:07:27,236 INFO L476 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-09-08 03:07:27,236 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2019-09-08 03:07:27,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-08 03:07:27,236 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:27,236 INFO L399 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:27,237 INFO L418 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:27,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:27,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1528881990, now seen corresponding path program 38 times [2019-09-08 03:07:27,237 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:27,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:27,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:27,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:07:27,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:27,245 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:27,245 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:27,245 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 [2019-09-08 03:07:27,255 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:07:27,361 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:07:27,361 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:27,365 WARN L254 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 183 conjunts are in the unsatisfiable core [2019-09-08 03:07:27,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:28,429 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:28,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:28,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2019-09-08 03:07:28,479 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-09-08 03:07:28,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-09-08 03:07:28,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2019-09-08 03:07:28,480 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 47 states. [2019-09-08 03:07:29,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:29,960 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2019-09-08 03:07:29,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-09-08 03:07:29,961 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 54 [2019-09-08 03:07:29,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:29,962 INFO L225 Difference]: With dead ends: 59 [2019-09-08 03:07:29,962 INFO L226 Difference]: Without dead ends: 56 [2019-09-08 03:07:29,962 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2019-09-08 03:07:29,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-09-08 03:07:29,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-09-08 03:07:29,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-09-08 03:07:29,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2019-09-08 03:07:29,969 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2019-09-08 03:07:29,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:29,969 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2019-09-08 03:07:29,969 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-09-08 03:07:29,969 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2019-09-08 03:07:29,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-08 03:07:29,969 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:29,969 INFO L399 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:29,970 INFO L418 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:29,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:29,970 INFO L82 PathProgramCache]: Analyzing trace with hash 150638976, now seen corresponding path program 39 times [2019-09-08 03:07:29,970 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:29,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:29,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:29,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:29,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:29,978 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:29,978 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:29,978 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) [2019-09-08 03:07:29,999 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:31,811 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-09-08 03:07:31,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:31,814 WARN L254 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 187 conjunts are in the unsatisfiable core [2019-09-08 03:07:31,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:32,893 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:32,946 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:32,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2019-09-08 03:07:32,947 INFO L454 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-09-08 03:07:32,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-09-08 03:07:32,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2019-09-08 03:07:32,947 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 48 states. [2019-09-08 03:07:34,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:34,472 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2019-09-08 03:07:34,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-09-08 03:07:34,473 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 55 [2019-09-08 03:07:34,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:34,473 INFO L225 Difference]: With dead ends: 60 [2019-09-08 03:07:34,473 INFO L226 Difference]: Without dead ends: 57 [2019-09-08 03:07:34,474 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2019-09-08 03:07:34,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-08 03:07:34,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-09-08 03:07:34,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-08 03:07:34,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-09-08 03:07:34,478 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2019-09-08 03:07:34,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:34,479 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-09-08 03:07:34,479 INFO L476 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-09-08 03:07:34,479 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-09-08 03:07:34,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-08 03:07:34,479 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:34,479 INFO L399 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:34,479 INFO L418 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:34,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:34,480 INFO L82 PathProgramCache]: Analyzing trace with hash 374778502, now seen corresponding path program 40 times [2019-09-08 03:07:34,480 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:34,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:34,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:34,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:34,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:34,488 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:34,488 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:34,488 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) [2019-09-08 03:07:34,513 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:35,004 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:07:35,005 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:35,007 WARN L254 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 191 conjunts are in the unsatisfiable core [2019-09-08 03:07:35,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:36,337 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:36,385 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:36,388 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:36,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2019-09-08 03:07:36,389 INFO L454 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-09-08 03:07:36,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-09-08 03:07:36,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2019-09-08 03:07:36,389 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 49 states. [2019-09-08 03:07:37,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:37,957 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2019-09-08 03:07:37,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-09-08 03:07:37,958 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 56 [2019-09-08 03:07:37,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:37,959 INFO L225 Difference]: With dead ends: 61 [2019-09-08 03:07:37,959 INFO L226 Difference]: Without dead ends: 58 [2019-09-08 03:07:37,959 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2019-09-08 03:07:37,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-09-08 03:07:37,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-09-08 03:07:37,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-08 03:07:37,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2019-09-08 03:07:37,964 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2019-09-08 03:07:37,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:37,964 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2019-09-08 03:07:37,965 INFO L476 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-09-08 03:07:37,965 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2019-09-08 03:07:37,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-09-08 03:07:37,965 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:37,965 INFO L399 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:37,965 INFO L418 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:37,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:37,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1266830784, now seen corresponding path program 41 times [2019-09-08 03:07:37,966 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:37,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:37,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:37,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:37,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:37,977 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:37,977 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:37,977 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) [2019-09-08 03:07:37,990 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:38,147 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-09-08 03:07:38,148 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:38,154 WARN L254 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 195 conjunts are in the unsatisfiable core [2019-09-08 03:07:38,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:39,303 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:39,354 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:39,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2019-09-08 03:07:39,355 INFO L454 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-09-08 03:07:39,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-09-08 03:07:39,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2019-09-08 03:07:39,356 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 50 states. [2019-09-08 03:07:40,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:40,991 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2019-09-08 03:07:40,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-09-08 03:07:40,992 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 57 [2019-09-08 03:07:40,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:40,993 INFO L225 Difference]: With dead ends: 62 [2019-09-08 03:07:40,993 INFO L226 Difference]: Without dead ends: 59 [2019-09-08 03:07:40,994 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=101, Invalid=2449, Unknown=0, NotChecked=0, Total=2550 [2019-09-08 03:07:40,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-09-08 03:07:40,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-09-08 03:07:40,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-08 03:07:41,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2019-09-08 03:07:41,000 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2019-09-08 03:07:41,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:41,000 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2019-09-08 03:07:41,000 INFO L476 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-09-08 03:07:41,000 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2019-09-08 03:07:41,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-09-08 03:07:41,001 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:41,001 INFO L399 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:41,001 INFO L418 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:41,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:41,001 INFO L82 PathProgramCache]: Analyzing trace with hash -617111098, now seen corresponding path program 42 times [2019-09-08 03:07:41,002 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:41,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:41,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:41,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:41,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:41,009 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:41,009 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:41,009 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 [2019-09-08 03:07:41,027 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:07:41,582 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2019-09-08 03:07:41,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:41,586 WARN L254 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 199 conjunts are in the unsatisfiable core [2019-09-08 03:07:41,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:42,828 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:42,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:42,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2019-09-08 03:07:42,888 INFO L454 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-09-08 03:07:42,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-09-08 03:07:42,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2019-09-08 03:07:42,889 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 51 states. [2019-09-08 03:07:44,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:44,622 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2019-09-08 03:07:44,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-09-08 03:07:44,622 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 58 [2019-09-08 03:07:44,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:44,623 INFO L225 Difference]: With dead ends: 63 [2019-09-08 03:07:44,623 INFO L226 Difference]: Without dead ends: 60 [2019-09-08 03:07:44,624 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2019-09-08 03:07:44,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-08 03:07:44,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-09-08 03:07:44,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-08 03:07:44,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2019-09-08 03:07:44,631 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2019-09-08 03:07:44,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:44,631 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2019-09-08 03:07:44,631 INFO L476 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-09-08 03:07:44,631 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2019-09-08 03:07:44,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-08 03:07:44,632 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:44,632 INFO L399 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:44,632 INFO L418 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:44,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:44,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1950637312, now seen corresponding path program 43 times [2019-09-08 03:07:44,632 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:44,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:44,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:44,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:44,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:44,639 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:44,639 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:44,639 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 [2019-09-08 03:07:44,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:07:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:07:44,738 WARN L254 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 203 conjunts are in the unsatisfiable core [2019-09-08 03:07:44,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:45,985 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:46,043 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:46,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2019-09-08 03:07:46,043 INFO L454 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-09-08 03:07:46,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-09-08 03:07:46,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2019-09-08 03:07:46,044 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 52 states. [2019-09-08 03:07:47,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:47,834 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2019-09-08 03:07:47,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-09-08 03:07:47,834 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 59 [2019-09-08 03:07:47,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:47,835 INFO L225 Difference]: With dead ends: 64 [2019-09-08 03:07:47,835 INFO L226 Difference]: Without dead ends: 61 [2019-09-08 03:07:47,835 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2019-09-08 03:07:47,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-08 03:07:47,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-09-08 03:07:47,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-09-08 03:07:47,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2019-09-08 03:07:47,842 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2019-09-08 03:07:47,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:47,842 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2019-09-08 03:07:47,842 INFO L476 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-09-08 03:07:47,842 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2019-09-08 03:07:47,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-09-08 03:07:47,842 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:47,842 INFO L399 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:47,843 INFO L418 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:47,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:47,843 INFO L82 PathProgramCache]: Analyzing trace with hash -340276986, now seen corresponding path program 44 times [2019-09-08 03:07:47,843 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:47,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:47,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:47,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:07:47,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:47,851 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:47,851 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:47,851 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-08 03:07:47,861 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:07:47,949 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:07:47,950 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:47,953 WARN L254 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 207 conjunts are in the unsatisfiable core [2019-09-08 03:07:47,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:49,252 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:49,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:49,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2019-09-08 03:07:49,317 INFO L454 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-09-08 03:07:49,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-09-08 03:07:49,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2019-09-08 03:07:49,318 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 53 states. [2019-09-08 03:07:51,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:51,182 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2019-09-08 03:07:51,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-09-08 03:07:51,183 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 60 [2019-09-08 03:07:51,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:51,183 INFO L225 Difference]: With dead ends: 65 [2019-09-08 03:07:51,183 INFO L226 Difference]: Without dead ends: 62 [2019-09-08 03:07:51,184 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2019-09-08 03:07:51,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-09-08 03:07:51,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-09-08 03:07:51,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-09-08 03:07:51,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2019-09-08 03:07:51,190 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2019-09-08 03:07:51,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:51,190 INFO L475 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2019-09-08 03:07:51,190 INFO L476 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-09-08 03:07:51,190 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2019-09-08 03:07:51,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-08 03:07:51,190 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:51,191 INFO L399 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:51,191 INFO L418 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:51,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:51,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1958714432, now seen corresponding path program 45 times [2019-09-08 03:07:51,191 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:51,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:51,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:51,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:51,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:51,199 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:51,199 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:51,199 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:51,216 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:07:53,985 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-09-08 03:07:53,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:53,989 WARN L254 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 211 conjunts are in the unsatisfiable core [2019-09-08 03:07:53,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:55,313 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:55,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:55,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2019-09-08 03:07:55,371 INFO L454 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-09-08 03:07:55,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-09-08 03:07:55,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2019-09-08 03:07:55,372 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 54 states. [2019-09-08 03:07:57,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:57,251 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2019-09-08 03:07:57,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-09-08 03:07:57,252 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 61 [2019-09-08 03:07:57,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:57,253 INFO L225 Difference]: With dead ends: 66 [2019-09-08 03:07:57,253 INFO L226 Difference]: Without dead ends: 63 [2019-09-08 03:07:57,254 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2019-09-08 03:07:57,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-08 03:07:57,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-09-08 03:07:57,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-08 03:07:57,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2019-09-08 03:07:57,260 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2019-09-08 03:07:57,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:57,261 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2019-09-08 03:07:57,261 INFO L476 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-09-08 03:07:57,261 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2019-09-08 03:07:57,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-09-08 03:07:57,261 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:57,262 INFO L399 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:57,262 INFO L418 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:57,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:57,262 INFO L82 PathProgramCache]: Analyzing trace with hash -590667706, now seen corresponding path program 46 times [2019-09-08 03:07:57,262 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:57,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:57,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:57,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:57,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:57,270 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:07:57,270 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:07:57,270 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:07:57,288 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:07:57,788 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:07:57,788 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:57,792 WARN L254 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 215 conjunts are in the unsatisfiable core [2019-09-08 03:07:57,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:59,186 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:07:59,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:59,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:07:59,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2019-09-08 03:07:59,244 INFO L454 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-09-08 03:07:59,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-09-08 03:07:59,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2019-09-08 03:07:59,244 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 55 states. [2019-09-08 03:08:01,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:01,215 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2019-09-08 03:08:01,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-09-08 03:08:01,215 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 62 [2019-09-08 03:08:01,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:01,216 INFO L225 Difference]: With dead ends: 67 [2019-09-08 03:08:01,216 INFO L226 Difference]: Without dead ends: 64 [2019-09-08 03:08:01,217 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2019-09-08 03:08:01,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-09-08 03:08:01,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-09-08 03:08:01,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-09-08 03:08:01,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2019-09-08 03:08:01,223 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2019-09-08 03:08:01,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:01,223 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2019-09-08 03:08:01,223 INFO L476 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-09-08 03:08:01,224 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2019-09-08 03:08:01,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-09-08 03:08:01,224 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:01,224 INFO L399 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:01,224 INFO L418 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:01,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:01,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1130892160, now seen corresponding path program 47 times [2019-09-08 03:08:01,225 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:01,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:01,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:01,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:01,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:01,233 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:01,233 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:01,233 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) [2019-09-08 03:08:01,259 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:08:01,388 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-09-08 03:08:01,388 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:01,394 WARN L254 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 219 conjunts are in the unsatisfiable core [2019-09-08 03:08:01,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:02,865 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:02,935 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:02,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2019-09-08 03:08:02,935 INFO L454 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-09-08 03:08:02,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-09-08 03:08:02,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2019-09-08 03:08:02,936 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 56 states. [2019-09-08 03:08:05,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:05,000 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2019-09-08 03:08:05,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-09-08 03:08:05,001 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 63 [2019-09-08 03:08:05,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:05,002 INFO L225 Difference]: With dead ends: 68 [2019-09-08 03:08:05,002 INFO L226 Difference]: Without dead ends: 65 [2019-09-08 03:08:05,003 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2019-09-08 03:08:05,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-09-08 03:08:05,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-09-08 03:08:05,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-09-08 03:08:05,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2019-09-08 03:08:05,009 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2019-09-08 03:08:05,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:05,010 INFO L475 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2019-09-08 03:08:05,010 INFO L476 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-09-08 03:08:05,010 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2019-09-08 03:08:05,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-09-08 03:08:05,011 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:05,011 INFO L399 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:05,011 INFO L418 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:05,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:05,011 INFO L82 PathProgramCache]: Analyzing trace with hash -697981050, now seen corresponding path program 48 times [2019-09-08 03:08:05,011 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:05,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:05,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:05,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:05,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:05,019 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:05,020 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:05,020 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) [2019-09-08 03:08:05,036 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:08:05,640 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-09-08 03:08:05,640 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:05,646 WARN L254 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 223 conjunts are in the unsatisfiable core [2019-09-08 03:08:05,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:07,154 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:07,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:07,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:07,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2019-09-08 03:08:07,212 INFO L454 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-09-08 03:08:07,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-09-08 03:08:07,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2019-09-08 03:08:07,213 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 57 states. [2019-09-08 03:08:09,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:09,359 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2019-09-08 03:08:09,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-09-08 03:08:09,360 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 64 [2019-09-08 03:08:09,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:09,360 INFO L225 Difference]: With dead ends: 69 [2019-09-08 03:08:09,360 INFO L226 Difference]: Without dead ends: 66 [2019-09-08 03:08:09,361 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2019-09-08 03:08:09,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-08 03:08:09,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-09-08 03:08:09,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-08 03:08:09,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2019-09-08 03:08:09,366 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2019-09-08 03:08:09,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:09,366 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2019-09-08 03:08:09,366 INFO L476 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-09-08 03:08:09,366 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2019-09-08 03:08:09,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-08 03:08:09,367 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:09,367 INFO L399 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:09,367 INFO L418 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:09,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:09,368 INFO L82 PathProgramCache]: Analyzing trace with hash -162638528, now seen corresponding path program 49 times [2019-09-08 03:08:09,368 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:09,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:09,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:09,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:09,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:09,376 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:09,376 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:09,376 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) [2019-09-08 03:08:09,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:08:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:08:09,510 WARN L254 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 227 conjunts are in the unsatisfiable core [2019-09-08 03:08:09,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:10,987 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:11,045 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:11,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2019-09-08 03:08:11,046 INFO L454 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-09-08 03:08:11,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-09-08 03:08:11,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2019-09-08 03:08:11,047 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 58 states. [2019-09-08 03:08:13,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:13,248 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2019-09-08 03:08:13,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-09-08 03:08:13,248 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 65 [2019-09-08 03:08:13,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:13,249 INFO L225 Difference]: With dead ends: 70 [2019-09-08 03:08:13,249 INFO L226 Difference]: Without dead ends: 67 [2019-09-08 03:08:13,250 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=117, Invalid=3305, Unknown=0, NotChecked=0, Total=3422 [2019-09-08 03:08:13,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-09-08 03:08:13,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-09-08 03:08:13,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-09-08 03:08:13,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2019-09-08 03:08:13,257 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2019-09-08 03:08:13,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:13,257 INFO L475 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2019-09-08 03:08:13,257 INFO L476 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-09-08 03:08:13,257 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2019-09-08 03:08:13,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-09-08 03:08:13,258 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:13,258 INFO L399 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:13,258 INFO L418 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:13,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:13,259 INFO L82 PathProgramCache]: Analyzing trace with hash -746889530, now seen corresponding path program 50 times [2019-09-08 03:08:13,259 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:13,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:13,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:13,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:08:13,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:13,267 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:13,267 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:13,267 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-08 03:08:13,288 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:08:13,392 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:08:13,393 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:13,396 WARN L254 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 231 conjunts are in the unsatisfiable core [2019-09-08 03:08:13,398 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:14,989 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:15,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:15,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:15,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2019-09-08 03:08:15,048 INFO L454 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-09-08 03:08:15,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-09-08 03:08:15,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2019-09-08 03:08:15,049 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 59 states. [2019-09-08 03:08:17,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:17,348 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2019-09-08 03:08:17,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-09-08 03:08:17,348 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 66 [2019-09-08 03:08:17,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:17,350 INFO L225 Difference]: With dead ends: 71 [2019-09-08 03:08:17,350 INFO L226 Difference]: Without dead ends: 68 [2019-09-08 03:08:17,350 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=119, Invalid=3421, Unknown=0, NotChecked=0, Total=3540 [2019-09-08 03:08:17,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-08 03:08:17,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-09-08 03:08:17,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-08 03:08:17,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2019-09-08 03:08:17,356 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2019-09-08 03:08:17,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:17,356 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2019-09-08 03:08:17,356 INFO L476 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-09-08 03:08:17,357 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2019-09-08 03:08:17,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-08 03:08:17,357 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:17,357 INFO L399 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:17,357 INFO L418 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:17,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:17,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1678801408, now seen corresponding path program 51 times [2019-09-08 03:08:17,358 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:17,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:17,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:17,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:17,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:17,366 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:17,367 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:17,367 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:08:17,398 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:08:21,846 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2019-09-08 03:08:21,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:21,852 WARN L254 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 235 conjunts are in the unsatisfiable core [2019-09-08 03:08:21,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:23,717 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:23,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:23,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:23,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2019-09-08 03:08:23,782 INFO L454 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-09-08 03:08:23,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-09-08 03:08:23,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2019-09-08 03:08:23,783 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 60 states. [2019-09-08 03:08:26,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:26,150 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2019-09-08 03:08:26,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-09-08 03:08:26,150 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 67 [2019-09-08 03:08:26,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:26,151 INFO L225 Difference]: With dead ends: 72 [2019-09-08 03:08:26,152 INFO L226 Difference]: Without dead ends: 69 [2019-09-08 03:08:26,152 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2019-09-08 03:08:26,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-08 03:08:26,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-09-08 03:08:26,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-09-08 03:08:26,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2019-09-08 03:08:26,157 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2019-09-08 03:08:26,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:26,158 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2019-09-08 03:08:26,158 INFO L476 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-09-08 03:08:26,158 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2019-09-08 03:08:26,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-08 03:08:26,158 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:26,158 INFO L399 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:26,159 INFO L418 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:26,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:26,159 INFO L82 PathProgramCache]: Analyzing trace with hash -503298554, now seen corresponding path program 52 times [2019-09-08 03:08:26,159 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:26,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:26,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:26,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:26,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:26,167 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:26,167 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:26,168 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:08:26,192 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:08:26,789 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:08:26,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:26,793 WARN L254 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 239 conjunts are in the unsatisfiable core [2019-09-08 03:08:26,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:28,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:28,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:28,608 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:28,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2019-09-08 03:08:28,608 INFO L454 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-09-08 03:08:28,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-09-08 03:08:28,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2019-09-08 03:08:28,609 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 61 states. [2019-09-08 03:08:31,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:31,055 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2019-09-08 03:08:31,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-09-08 03:08:31,056 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 68 [2019-09-08 03:08:31,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:31,057 INFO L225 Difference]: With dead ends: 73 [2019-09-08 03:08:31,057 INFO L226 Difference]: Without dead ends: 70 [2019-09-08 03:08:31,057 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=123, Invalid=3659, Unknown=0, NotChecked=0, Total=3782 [2019-09-08 03:08:31,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-09-08 03:08:31,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-09-08 03:08:31,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-09-08 03:08:31,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2019-09-08 03:08:31,065 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2019-09-08 03:08:31,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:31,065 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2019-09-08 03:08:31,065 INFO L476 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-09-08 03:08:31,065 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2019-09-08 03:08:31,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-09-08 03:08:31,066 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:31,066 INFO L399 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:31,066 INFO L418 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:31,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:31,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1577551552, now seen corresponding path program 53 times [2019-09-08 03:08:31,066 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:31,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:31,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:31,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:31,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:31,074 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:31,074 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:31,074 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:08:31,099 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:08:31,264 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2019-09-08 03:08:31,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:31,271 WARN L254 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 243 conjunts are in the unsatisfiable core [2019-09-08 03:08:31,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:33,008 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:33,071 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:33,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2019-09-08 03:08:33,072 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-09-08 03:08:33,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-09-08 03:08:33,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2019-09-08 03:08:33,072 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 62 states. [2019-09-08 03:08:35,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:35,597 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2019-09-08 03:08:35,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-09-08 03:08:35,598 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 69 [2019-09-08 03:08:35,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:35,599 INFO L225 Difference]: With dead ends: 74 [2019-09-08 03:08:35,599 INFO L226 Difference]: Without dead ends: 71 [2019-09-08 03:08:35,599 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=125, Invalid=3781, Unknown=0, NotChecked=0, Total=3906 [2019-09-08 03:08:35,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-09-08 03:08:35,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-09-08 03:08:35,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-09-08 03:08:35,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2019-09-08 03:08:35,611 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2019-09-08 03:08:35,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:35,611 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2019-09-08 03:08:35,611 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-09-08 03:08:35,611 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2019-09-08 03:08:35,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-09-08 03:08:35,612 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:35,612 INFO L399 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:35,612 INFO L418 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:35,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:35,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1659395398, now seen corresponding path program 54 times [2019-09-08 03:08:35,613 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:35,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:35,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:35,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:35,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:35,620 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:35,620 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:35,620 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) [2019-09-08 03:08:35,633 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:08:37,746 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2019-09-08 03:08:37,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:37,753 WARN L254 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 247 conjunts are in the unsatisfiable core [2019-09-08 03:08:37,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:39,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:39,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:39,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:39,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2019-09-08 03:08:39,602 INFO L454 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-09-08 03:08:39,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-09-08 03:08:39,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2019-09-08 03:08:39,603 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 63 states. [2019-09-08 03:08:42,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:42,245 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2019-09-08 03:08:42,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-09-08 03:08:42,246 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 70 [2019-09-08 03:08:42,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:42,246 INFO L225 Difference]: With dead ends: 75 [2019-09-08 03:08:42,247 INFO L226 Difference]: Without dead ends: 72 [2019-09-08 03:08:42,247 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=127, Invalid=3905, Unknown=0, NotChecked=0, Total=4032 [2019-09-08 03:08:42,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-09-08 03:08:42,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-09-08 03:08:42,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-08 03:08:42,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2019-09-08 03:08:42,253 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2019-09-08 03:08:42,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:42,253 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2019-09-08 03:08:42,253 INFO L476 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-09-08 03:08:42,254 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2019-09-08 03:08:42,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-09-08 03:08:42,254 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:42,254 INFO L399 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:42,254 INFO L418 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:42,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:42,255 INFO L82 PathProgramCache]: Analyzing trace with hash -98412672, now seen corresponding path program 55 times [2019-09-08 03:08:42,255 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:42,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:42,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:42,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:42,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:42,262 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:42,262 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:42,263 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 [2019-09-08 03:08:42,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:08:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:08:42,437 WARN L254 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 251 conjunts are in the unsatisfiable core [2019-09-08 03:08:42,439 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:44,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:44,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:44,383 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:44,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2019-09-08 03:08:44,384 INFO L454 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-09-08 03:08:44,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-09-08 03:08:44,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2019-09-08 03:08:44,384 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 64 states. [2019-09-08 03:08:47,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:47,086 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2019-09-08 03:08:47,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-09-08 03:08:47,086 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 71 [2019-09-08 03:08:47,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:47,087 INFO L225 Difference]: With dead ends: 76 [2019-09-08 03:08:47,087 INFO L226 Difference]: Without dead ends: 73 [2019-09-08 03:08:47,088 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=129, Invalid=4031, Unknown=0, NotChecked=0, Total=4160 [2019-09-08 03:08:47,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-08 03:08:47,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-09-08 03:08:47,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-09-08 03:08:47,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2019-09-08 03:08:47,093 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2019-09-08 03:08:47,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:47,093 INFO L475 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2019-09-08 03:08:47,093 INFO L476 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-09-08 03:08:47,093 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2019-09-08 03:08:47,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-08 03:08:47,094 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:47,094 INFO L399 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:47,094 INFO L418 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:47,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:47,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1244112006, now seen corresponding path program 56 times [2019-09-08 03:08:47,094 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:47,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:47,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:47,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:08:47,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:47,102 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:47,102 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:47,102 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) [2019-09-08 03:08:47,133 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:08:47,285 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:08:47,286 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:47,289 WARN L254 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 255 conjunts are in the unsatisfiable core [2019-09-08 03:08:47,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:49,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:49,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:49,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2019-09-08 03:08:49,314 INFO L454 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-09-08 03:08:49,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-09-08 03:08:49,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2019-09-08 03:08:49,315 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 65 states. [2019-09-08 03:08:52,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:52,085 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2019-09-08 03:08:52,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-09-08 03:08:52,086 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 72 [2019-09-08 03:08:52,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:52,087 INFO L225 Difference]: With dead ends: 77 [2019-09-08 03:08:52,087 INFO L226 Difference]: Without dead ends: 74 [2019-09-08 03:08:52,087 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=131, Invalid=4159, Unknown=0, NotChecked=0, Total=4290 [2019-09-08 03:08:52,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-09-08 03:08:52,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-09-08 03:08:52,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-09-08 03:08:52,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2019-09-08 03:08:52,095 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2019-09-08 03:08:52,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:52,095 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2019-09-08 03:08:52,095 INFO L476 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-09-08 03:08:52,095 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2019-09-08 03:08:52,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-08 03:08:52,096 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:52,096 INFO L399 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:52,096 INFO L418 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:52,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:52,096 INFO L82 PathProgramCache]: Analyzing trace with hash -87295936, now seen corresponding path program 57 times [2019-09-08 03:08:52,097 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:52,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:52,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:52,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:52,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:52,104 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:08:52,105 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:08:52,105 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 [2019-09-08 03:08:52,131 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:08:56,881 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2019-09-08 03:08:56,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:56,887 WARN L254 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 259 conjunts are in the unsatisfiable core [2019-09-08 03:08:56,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:58,905 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:08:58,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:58,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:08:58,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2019-09-08 03:08:58,974 INFO L454 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-09-08 03:08:58,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-09-08 03:08:58,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2019-09-08 03:08:58,975 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 66 states. [2019-09-08 03:09:01,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:09:01,841 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2019-09-08 03:09:01,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-09-08 03:09:01,841 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 73 [2019-09-08 03:09:01,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:09:01,842 INFO L225 Difference]: With dead ends: 78 [2019-09-08 03:09:01,842 INFO L226 Difference]: Without dead ends: 75 [2019-09-08 03:09:01,842 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=133, Invalid=4289, Unknown=0, NotChecked=0, Total=4422 [2019-09-08 03:09:01,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-09-08 03:09:01,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-09-08 03:09:01,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-08 03:09:01,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2019-09-08 03:09:01,849 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2019-09-08 03:09:01,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:09:01,850 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2019-09-08 03:09:01,850 INFO L476 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-09-08 03:09:01,850 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2019-09-08 03:09:01,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-09-08 03:09:01,850 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:09:01,850 INFO L399 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:09:01,851 INFO L418 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:09:01,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:09:01,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1588730822, now seen corresponding path program 58 times [2019-09-08 03:09:01,851 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:09:01,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:09:01,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:01,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:09:01,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:01,861 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:09:01,861 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:09:01,861 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) [2019-09-08 03:09:01,880 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 [2019-09-08 03:09:02,667 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:09:02,667 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:09:02,672 WARN L254 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 263 conjunts are in the unsatisfiable core [2019-09-08 03:09:02,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:09:04,678 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:09:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:09:04,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:09:04,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2019-09-08 03:09:04,748 INFO L454 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-09-08 03:09:04,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-09-08 03:09:04,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2019-09-08 03:09:04,749 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 67 states. [2019-09-08 03:09:07,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:09:07,647 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2019-09-08 03:09:07,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-09-08 03:09:07,648 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 74 [2019-09-08 03:09:07,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:09:07,649 INFO L225 Difference]: With dead ends: 79 [2019-09-08 03:09:07,649 INFO L226 Difference]: Without dead ends: 76 [2019-09-08 03:09:07,649 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=135, Invalid=4421, Unknown=0, NotChecked=0, Total=4556 [2019-09-08 03:09:07,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-09-08 03:09:07,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-09-08 03:09:07,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-09-08 03:09:07,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2019-09-08 03:09:07,659 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2019-09-08 03:09:07,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:09:07,659 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2019-09-08 03:09:07,660 INFO L476 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-09-08 03:09:07,660 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2019-09-08 03:09:07,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-09-08 03:09:07,660 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:09:07,660 INFO L399 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:09:07,661 INFO L418 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:09:07,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:09:07,661 INFO L82 PathProgramCache]: Analyzing trace with hash 2005952768, now seen corresponding path program 59 times [2019-09-08 03:09:07,661 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:09:07,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:09:07,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:07,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:09:07,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:07,670 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:09:07,670 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:09:07,671 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) [2019-09-08 03:09:07,690 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:09:07,997 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2019-09-08 03:09:07,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:09:08,005 WARN L254 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 267 conjunts are in the unsatisfiable core [2019-09-08 03:09:08,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:09:10,061 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:09:10,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:09:10,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:09:10,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2019-09-08 03:09:10,136 INFO L454 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-09-08 03:09:10,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-09-08 03:09:10,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2019-09-08 03:09:10,137 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 68 states. [2019-09-08 03:09:13,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:09:13,190 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2019-09-08 03:09:13,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-09-08 03:09:13,191 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 75 [2019-09-08 03:09:13,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:09:13,191 INFO L225 Difference]: With dead ends: 80 [2019-09-08 03:09:13,191 INFO L226 Difference]: Without dead ends: 77 [2019-09-08 03:09:13,192 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2019-09-08 03:09:13,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-09-08 03:09:13,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-09-08 03:09:13,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-09-08 03:09:13,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2019-09-08 03:09:13,199 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2019-09-08 03:09:13,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:09:13,199 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2019-09-08 03:09:13,199 INFO L476 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-09-08 03:09:13,199 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2019-09-08 03:09:13,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-09-08 03:09:13,200 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:09:13,200 INFO L399 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:09:13,200 INFO L418 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:09:13,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:09:13,201 INFO L82 PathProgramCache]: Analyzing trace with hash 2054931206, now seen corresponding path program 60 times [2019-09-08 03:09:13,201 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:09:13,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:09:13,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:13,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:09:13,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:13,210 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:09:13,210 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:09:13,210 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 [2019-09-08 03:09:13,235 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:09:15,802 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-09-08 03:09:15,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:09:15,810 WARN L254 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 271 conjunts are in the unsatisfiable core [2019-09-08 03:09:15,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:09:17,950 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:09:18,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:09:18,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:09:18,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2019-09-08 03:09:18,022 INFO L454 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-09-08 03:09:18,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-09-08 03:09:18,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2019-09-08 03:09:18,023 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 69 states. [2019-09-08 03:09:21,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:09:21,216 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2019-09-08 03:09:21,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-09-08 03:09:21,217 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 76 [2019-09-08 03:09:21,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:09:21,218 INFO L225 Difference]: With dead ends: 81 [2019-09-08 03:09:21,218 INFO L226 Difference]: Without dead ends: 78 [2019-09-08 03:09:21,218 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2019-09-08 03:09:21,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-08 03:09:21,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-09-08 03:09:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-09-08 03:09:21,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2019-09-08 03:09:21,225 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2019-09-08 03:09:21,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:09:21,225 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2019-09-08 03:09:21,225 INFO L476 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-09-08 03:09:21,225 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2019-09-08 03:09:21,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-09-08 03:09:21,226 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:09:21,226 INFO L399 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:09:21,226 INFO L418 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:09:21,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:09:21,226 INFO L82 PathProgramCache]: Analyzing trace with hash -721704512, now seen corresponding path program 61 times [2019-09-08 03:09:21,226 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:09:21,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:09:21,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:21,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:09:21,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:21,234 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:09:21,234 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:09:21,234 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) [2019-09-08 03:09:21,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:09:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:09:21,655 WARN L254 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 275 conjunts are in the unsatisfiable core [2019-09-08 03:09:21,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:09:24,162 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:09:24,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:09:24,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:09:24,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2019-09-08 03:09:24,238 INFO L454 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-09-08 03:09:24,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-09-08 03:09:24,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2019-09-08 03:09:24,239 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 70 states. [2019-09-08 03:09:27,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:09:27,486 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2019-09-08 03:09:27,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-09-08 03:09:27,487 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 77 [2019-09-08 03:09:27,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:09:27,488 INFO L225 Difference]: With dead ends: 82 [2019-09-08 03:09:27,488 INFO L226 Difference]: Without dead ends: 79 [2019-09-08 03:09:27,488 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2019-09-08 03:09:27,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-08 03:09:27,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-09-08 03:09:27,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-08 03:09:27,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2019-09-08 03:09:27,496 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2019-09-08 03:09:27,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:09:27,496 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2019-09-08 03:09:27,496 INFO L476 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-09-08 03:09:27,497 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2019-09-08 03:09:27,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-09-08 03:09:27,497 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:09:27,497 INFO L399 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:09:27,497 INFO L418 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:09:27,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:09:27,498 INFO L82 PathProgramCache]: Analyzing trace with hash -898065850, now seen corresponding path program 62 times [2019-09-08 03:09:27,498 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:09:27,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:09:27,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:27,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:09:27,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:27,506 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:09:27,507 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:09:27,507 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:09:27,525 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:09:27,721 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:09:27,722 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:09:27,725 WARN L254 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 279 conjunts are in the unsatisfiable core [2019-09-08 03:09:27,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:09:30,055 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:09:30,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:09:30,127 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:09:30,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2019-09-08 03:09:30,127 INFO L454 AbstractCegarLoop]: Interpolant automaton has 71 states [2019-09-08 03:09:30,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2019-09-08 03:09:30,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2019-09-08 03:09:30,128 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 71 states. [2019-09-08 03:09:33,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:09:33,471 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2019-09-08 03:09:33,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-09-08 03:09:33,471 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 78 [2019-09-08 03:09:33,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:09:33,472 INFO L225 Difference]: With dead ends: 83 [2019-09-08 03:09:33,472 INFO L226 Difference]: Without dead ends: 80 [2019-09-08 03:09:33,473 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=143, Invalid=4969, Unknown=0, NotChecked=0, Total=5112 [2019-09-08 03:09:33,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-09-08 03:09:33,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-09-08 03:09:33,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-09-08 03:09:33,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2019-09-08 03:09:33,479 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2019-09-08 03:09:33,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:09:33,479 INFO L475 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2019-09-08 03:09:33,479 INFO L476 AbstractCegarLoop]: Interpolant automaton has 71 states. [2019-09-08 03:09:33,479 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2019-09-08 03:09:33,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-08 03:09:33,480 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:09:33,480 INFO L399 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:09:33,480 INFO L418 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:09:33,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:09:33,480 INFO L82 PathProgramCache]: Analyzing trace with hash -2070300032, now seen corresponding path program 63 times [2019-09-08 03:09:33,480 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:09:33,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:09:33,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:33,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:09:33,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:33,500 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:09:33,500 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:09:33,500 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) [2019-09-08 03:09:33,517 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:09:38,473 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2019-09-08 03:09:38,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:09:38,479 WARN L254 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 283 conjunts are in the unsatisfiable core [2019-09-08 03:09:38,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:09:40,865 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:09:40,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:09:40,941 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:09:40,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2019-09-08 03:09:40,942 INFO L454 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-09-08 03:09:40,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-09-08 03:09:40,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2019-09-08 03:09:40,943 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 72 states. [2019-09-08 03:09:44,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:09:44,390 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2019-09-08 03:09:44,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-09-08 03:09:44,391 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 79 [2019-09-08 03:09:44,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:09:44,392 INFO L225 Difference]: With dead ends: 84 [2019-09-08 03:09:44,392 INFO L226 Difference]: Without dead ends: 81 [2019-09-08 03:09:44,393 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=145, Invalid=5111, Unknown=0, NotChecked=0, Total=5256 [2019-09-08 03:09:44,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-08 03:09:44,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-09-08 03:09:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-09-08 03:09:44,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2019-09-08 03:09:44,399 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2019-09-08 03:09:44,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:09:44,400 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2019-09-08 03:09:44,400 INFO L476 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-09-08 03:09:44,400 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2019-09-08 03:09:44,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-09-08 03:09:44,400 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:09:44,401 INFO L399 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:09:44,401 INFO L418 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:09:44,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:09:44,401 INFO L82 PathProgramCache]: Analyzing trace with hash 245145990, now seen corresponding path program 64 times [2019-09-08 03:09:44,401 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:09:44,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:09:44,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:44,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:09:44,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:44,408 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:09:44,408 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:09:44,408 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 [2019-09-08 03:09:44,418 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:09:45,269 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:09:45,269 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:09:45,274 WARN L254 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 287 conjunts are in the unsatisfiable core [2019-09-08 03:09:45,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:09:47,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:09:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:09:47,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:09:47,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2019-09-08 03:09:47,830 INFO L454 AbstractCegarLoop]: Interpolant automaton has 73 states [2019-09-08 03:09:47,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2019-09-08 03:09:47,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2019-09-08 03:09:47,830 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 73 states. [2019-09-08 03:09:51,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:09:51,394 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2019-09-08 03:09:51,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-09-08 03:09:51,394 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 80 [2019-09-08 03:09:51,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:09:51,395 INFO L225 Difference]: With dead ends: 85 [2019-09-08 03:09:51,395 INFO L226 Difference]: Without dead ends: 82 [2019-09-08 03:09:51,395 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=147, Invalid=5255, Unknown=0, NotChecked=0, Total=5402 [2019-09-08 03:09:51,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-09-08 03:09:51,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-09-08 03:09:51,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-09-08 03:09:51,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2019-09-08 03:09:51,404 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2019-09-08 03:09:51,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:09:51,404 INFO L475 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2019-09-08 03:09:51,405 INFO L476 AbstractCegarLoop]: Interpolant automaton has 73 states. [2019-09-08 03:09:51,405 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2019-09-08 03:09:51,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-08 03:09:51,405 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:09:51,405 INFO L399 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:09:51,406 INFO L418 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:09:51,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:09:51,406 INFO L82 PathProgramCache]: Analyzing trace with hash -990471360, now seen corresponding path program 65 times [2019-09-08 03:09:51,406 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:09:51,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:09:51,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:51,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:09:51,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:51,414 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:09:51,414 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:09:51,414 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) [2019-09-08 03:09:51,439 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:09:51,740 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2019-09-08 03:09:51,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:09:51,749 WARN L254 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 291 conjunts are in the unsatisfiable core [2019-09-08 03:09:51,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:09:54,266 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:09:54,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:09:54,345 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:09:54,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2019-09-08 03:09:54,346 INFO L454 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-09-08 03:09:54,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-09-08 03:09:54,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2019-09-08 03:09:54,346 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 74 states. [2019-09-08 03:09:57,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:09:57,985 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2019-09-08 03:09:57,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2019-09-08 03:09:57,986 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 81 [2019-09-08 03:09:57,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:09:57,987 INFO L225 Difference]: With dead ends: 86 [2019-09-08 03:09:57,987 INFO L226 Difference]: Without dead ends: 83 [2019-09-08 03:09:57,987 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=149, Invalid=5401, Unknown=0, NotChecked=0, Total=5550 [2019-09-08 03:09:57,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-09-08 03:09:57,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-09-08 03:09:57,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-09-08 03:09:57,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2019-09-08 03:09:57,997 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2019-09-08 03:09:57,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:09:57,997 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2019-09-08 03:09:57,997 INFO L476 AbstractCegarLoop]: Interpolant automaton has 74 states. [2019-09-08 03:09:57,997 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2019-09-08 03:09:57,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-09-08 03:09:57,998 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:09:57,998 INFO L399 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:09:57,998 INFO L418 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:09:57,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:09:57,999 INFO L82 PathProgramCache]: Analyzing trace with hash -639903546, now seen corresponding path program 66 times [2019-09-08 03:09:57,999 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:09:57,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:09:57,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:57,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:09:58,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:58,007 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:09:58,007 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:09:58,007 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:09:58,029 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:10:01,686 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2019-09-08 03:10:01,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:10:01,692 WARN L254 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 295 conjunts are in the unsatisfiable core [2019-09-08 03:10:01,694 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:10:04,481 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:10:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:10:04,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:10:04,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2019-09-08 03:10:04,563 INFO L454 AbstractCegarLoop]: Interpolant automaton has 75 states [2019-09-08 03:10:04,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2019-09-08 03:10:04,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2019-09-08 03:10:04,564 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 75 states. [2019-09-08 03:10:08,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:10:08,451 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2019-09-08 03:10:08,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-09-08 03:10:08,451 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 82 [2019-09-08 03:10:08,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:10:08,452 INFO L225 Difference]: With dead ends: 87 [2019-09-08 03:10:08,452 INFO L226 Difference]: Without dead ends: 84 [2019-09-08 03:10:08,452 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=151, Invalid=5549, Unknown=0, NotChecked=0, Total=5700 [2019-09-08 03:10:08,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-08 03:10:08,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-09-08 03:10:08,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-09-08 03:10:08,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2019-09-08 03:10:08,458 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2019-09-08 03:10:08,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:10:08,459 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2019-09-08 03:10:08,459 INFO L476 AbstractCegarLoop]: Interpolant automaton has 75 states. [2019-09-08 03:10:08,459 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2019-09-08 03:10:08,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-08 03:10:08,459 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:10:08,459 INFO L399 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:10:08,460 INFO L418 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:10:08,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:10:08,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1637764096, now seen corresponding path program 67 times [2019-09-08 03:10:08,460 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:10:08,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:10:08,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:08,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:10:08,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:08,475 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:10:08,475 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:10:08,475 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) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:10:08,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:10:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:10:08,810 WARN L254 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 299 conjunts are in the unsatisfiable core [2019-09-08 03:10:08,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:10:11,958 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:10:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:10:12,034 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:10:12,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2019-09-08 03:10:12,035 INFO L454 AbstractCegarLoop]: Interpolant automaton has 76 states [2019-09-08 03:10:12,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2019-09-08 03:10:12,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2019-09-08 03:10:12,035 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 76 states. [2019-09-08 03:10:15,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:10:15,826 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2019-09-08 03:10:15,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2019-09-08 03:10:15,826 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 83 [2019-09-08 03:10:15,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:10:15,827 INFO L225 Difference]: With dead ends: 88 [2019-09-08 03:10:15,827 INFO L226 Difference]: Without dead ends: 85 [2019-09-08 03:10:15,828 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=153, Invalid=5699, Unknown=0, NotChecked=0, Total=5852 [2019-09-08 03:10:15,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-09-08 03:10:15,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2019-09-08 03:10:15,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-09-08 03:10:15,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2019-09-08 03:10:15,836 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2019-09-08 03:10:15,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:10:15,836 INFO L475 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2019-09-08 03:10:15,836 INFO L476 AbstractCegarLoop]: Interpolant automaton has 76 states. [2019-09-08 03:10:15,836 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2019-09-08 03:10:15,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-09-08 03:10:15,837 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:10:15,837 INFO L399 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:10:15,837 INFO L418 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:10:15,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:10:15,837 INFO L82 PathProgramCache]: Analyzing trace with hash -768983034, now seen corresponding path program 68 times [2019-09-08 03:10:15,837 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:10:15,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:10:15,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:15,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:10:15,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:15,843 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:10:15,843 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:10:15,844 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) [2019-09-08 03:10:15,860 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:10:16,090 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:10:16,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:10:16,095 WARN L254 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 303 conjunts are in the unsatisfiable core [2019-09-08 03:10:16,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:10:18,843 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:10:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:10:18,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:10:18,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2019-09-08 03:10:18,927 INFO L454 AbstractCegarLoop]: Interpolant automaton has 77 states [2019-09-08 03:10:18,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2019-09-08 03:10:18,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2019-09-08 03:10:18,927 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 77 states. [2019-09-08 03:10:22,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:10:22,913 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2019-09-08 03:10:22,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2019-09-08 03:10:22,913 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 84 [2019-09-08 03:10:22,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:10:22,914 INFO L225 Difference]: With dead ends: 89 [2019-09-08 03:10:22,914 INFO L226 Difference]: Without dead ends: 86 [2019-09-08 03:10:22,914 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=155, Invalid=5851, Unknown=0, NotChecked=0, Total=6006 [2019-09-08 03:10:22,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-09-08 03:10:22,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-09-08 03:10:22,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-09-08 03:10:22,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2019-09-08 03:10:22,921 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2019-09-08 03:10:22,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:10:22,921 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2019-09-08 03:10:22,921 INFO L476 AbstractCegarLoop]: Interpolant automaton has 77 states. [2019-09-08 03:10:22,921 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2019-09-08 03:10:22,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-09-08 03:10:22,922 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:10:22,922 INFO L399 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:10:22,922 INFO L418 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:10:22,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:10:22,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1931267264, now seen corresponding path program 69 times [2019-09-08 03:10:22,922 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:10:22,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:10:22,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:22,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:10:22,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:22,929 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:10:22,930 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:10:22,930 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:10:22,948 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:10:28,781 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2019-09-08 03:10:28,781 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:10:28,788 WARN L254 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 307 conjunts are in the unsatisfiable core [2019-09-08 03:10:28,789 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:10:31,502 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:10:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:10:31,586 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:10:31,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2019-09-08 03:10:31,586 INFO L454 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-09-08 03:10:31,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-09-08 03:10:31,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2019-09-08 03:10:31,587 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 78 states. [2019-09-08 03:10:35,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:10:35,597 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2019-09-08 03:10:35,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2019-09-08 03:10:35,597 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 85 [2019-09-08 03:10:35,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:10:35,598 INFO L225 Difference]: With dead ends: 90 [2019-09-08 03:10:35,598 INFO L226 Difference]: Without dead ends: 87 [2019-09-08 03:10:35,599 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=157, Invalid=6005, Unknown=0, NotChecked=0, Total=6162 [2019-09-08 03:10:35,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-09-08 03:10:35,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2019-09-08 03:10:35,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-09-08 03:10:35,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2019-09-08 03:10:35,605 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2019-09-08 03:10:35,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:10:35,605 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2019-09-08 03:10:35,606 INFO L476 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-09-08 03:10:35,606 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2019-09-08 03:10:35,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-09-08 03:10:35,606 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:10:35,606 INFO L399 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:10:35,606 INFO L418 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:10:35,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:10:35,607 INFO L82 PathProgramCache]: Analyzing trace with hash -260319418, now seen corresponding path program 70 times [2019-09-08 03:10:35,607 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:10:35,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:10:35,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:35,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:10:35,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:35,613 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:10:35,613 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:10:35,613 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 [2019-09-08 03:10:35,622 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:10:36,610 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:10:36,611 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:10:36,615 WARN L254 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 311 conjunts are in the unsatisfiable core [2019-09-08 03:10:36,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:10:39,422 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:10:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:10:39,510 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:10:39,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2019-09-08 03:10:39,511 INFO L454 AbstractCegarLoop]: Interpolant automaton has 79 states [2019-09-08 03:10:39,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2019-09-08 03:10:39,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2019-09-08 03:10:39,512 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 79 states. [2019-09-08 03:10:43,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:10:43,634 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2019-09-08 03:10:43,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-09-08 03:10:43,635 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 86 [2019-09-08 03:10:43,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:10:43,635 INFO L225 Difference]: With dead ends: 91 [2019-09-08 03:10:43,635 INFO L226 Difference]: Without dead ends: 88 [2019-09-08 03:10:43,636 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=159, Invalid=6161, Unknown=0, NotChecked=0, Total=6320 [2019-09-08 03:10:43,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-09-08 03:10:43,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-09-08 03:10:43,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-09-08 03:10:43,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2019-09-08 03:10:43,650 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2019-09-08 03:10:43,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:10:43,650 INFO L475 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2019-09-08 03:10:43,650 INFO L476 AbstractCegarLoop]: Interpolant automaton has 79 states. [2019-09-08 03:10:43,651 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2019-09-08 03:10:43,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-09-08 03:10:43,651 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:10:43,651 INFO L399 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:10:43,652 INFO L418 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:10:43,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:10:43,652 INFO L82 PathProgramCache]: Analyzing trace with hash 519970176, now seen corresponding path program 71 times [2019-09-08 03:10:43,652 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:10:43,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:10:43,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:43,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:10:43,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:43,658 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:10:43,658 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:10:43,658 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 [2019-09-08 03:10:43,669 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:10:44,022 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2019-09-08 03:10:44,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:10:44,027 WARN L254 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 315 conjunts are in the unsatisfiable core [2019-09-08 03:10:44,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:10:47,076 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:10:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:10:47,158 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:10:47,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2019-09-08 03:10:47,159 INFO L454 AbstractCegarLoop]: Interpolant automaton has 80 states [2019-09-08 03:10:47,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2019-09-08 03:10:47,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2019-09-08 03:10:47,159 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 80 states. [2019-09-08 03:10:51,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:10:51,401 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2019-09-08 03:10:51,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2019-09-08 03:10:51,402 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 87 [2019-09-08 03:10:51,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:10:51,403 INFO L225 Difference]: With dead ends: 92 [2019-09-08 03:10:51,403 INFO L226 Difference]: Without dead ends: 89 [2019-09-08 03:10:51,403 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=161, Invalid=6319, Unknown=0, NotChecked=0, Total=6480 [2019-09-08 03:10:51,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-09-08 03:10:51,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-09-08 03:10:51,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-09-08 03:10:51,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2019-09-08 03:10:51,410 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2019-09-08 03:10:51,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:10:51,410 INFO L475 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2019-09-08 03:10:51,410 INFO L476 AbstractCegarLoop]: Interpolant automaton has 80 states. [2019-09-08 03:10:51,411 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2019-09-08 03:10:51,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-08 03:10:51,411 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:10:51,411 INFO L399 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:10:51,411 INFO L418 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:10:51,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:10:51,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1060856186, now seen corresponding path program 72 times [2019-09-08 03:10:51,411 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:10:51,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:10:51,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:51,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:10:51,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:51,420 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:10:51,420 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:10:51,420 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) [2019-09-08 03:10:51,433 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:10:56,552 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2019-09-08 03:10:56,553 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:10:56,562 WARN L254 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 319 conjunts are in the unsatisfiable core [2019-09-08 03:10:56,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:10:59,492 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:10:59,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:10:59,578 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:10:59,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2019-09-08 03:10:59,579 INFO L454 AbstractCegarLoop]: Interpolant automaton has 81 states [2019-09-08 03:10:59,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2019-09-08 03:10:59,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2019-09-08 03:10:59,579 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 81 states. [2019-09-08 03:11:03,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:11:03,923 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2019-09-08 03:11:03,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-09-08 03:11:03,923 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 88 [2019-09-08 03:11:03,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:11:03,924 INFO L225 Difference]: With dead ends: 93 [2019-09-08 03:11:03,924 INFO L226 Difference]: Without dead ends: 90 [2019-09-08 03:11:03,925 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=163, Invalid=6479, Unknown=0, NotChecked=0, Total=6642 [2019-09-08 03:11:03,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-09-08 03:11:03,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-09-08 03:11:03,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-09-08 03:11:03,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2019-09-08 03:11:03,934 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2019-09-08 03:11:03,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:11:03,934 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2019-09-08 03:11:03,935 INFO L476 AbstractCegarLoop]: Interpolant automaton has 81 states. [2019-09-08 03:11:03,935 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2019-09-08 03:11:03,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-09-08 03:11:03,935 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:11:03,935 INFO L399 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:11:03,936 INFO L418 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:11:03,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:11:03,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1473134144, now seen corresponding path program 73 times [2019-09-08 03:11:03,936 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:11:03,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:11:03,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:03,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:11:03,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:03,944 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:11:03,944 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:11:03,944 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:11:03,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:11:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:11:04,231 WARN L254 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 323 conjunts are in the unsatisfiable core [2019-09-08 03:11:04,232 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:11:07,293 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:11:07,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:11:07,380 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:11:07,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2019-09-08 03:11:07,380 INFO L454 AbstractCegarLoop]: Interpolant automaton has 82 states [2019-09-08 03:11:07,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2019-09-08 03:11:07,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2019-09-08 03:11:07,381 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 82 states. [2019-09-08 03:11:11,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:11:11,911 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2019-09-08 03:11:11,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2019-09-08 03:11:11,911 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 89 [2019-09-08 03:11:11,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:11:11,912 INFO L225 Difference]: With dead ends: 94 [2019-09-08 03:11:11,912 INFO L226 Difference]: Without dead ends: 91 [2019-09-08 03:11:11,912 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=165, Invalid=6641, Unknown=0, NotChecked=0, Total=6806 [2019-09-08 03:11:11,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-09-08 03:11:11,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-09-08 03:11:11,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-09-08 03:11:11,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2019-09-08 03:11:11,920 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2019-09-08 03:11:11,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:11:11,920 INFO L475 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2019-09-08 03:11:11,920 INFO L476 AbstractCegarLoop]: Interpolant automaton has 82 states. [2019-09-08 03:11:11,920 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2019-09-08 03:11:11,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-09-08 03:11:11,921 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:11:11,921 INFO L399 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:11:11,921 INFO L418 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:11:11,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:11:11,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1577544250, now seen corresponding path program 74 times [2019-09-08 03:11:11,922 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:11:11,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:11:11,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:11,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:11:11,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:11,929 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:11:11,929 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:11:11,929 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 [2019-09-08 03:11:11,955 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:11:12,228 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:11:12,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:11:12,233 WARN L254 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 327 conjunts are in the unsatisfiable core [2019-09-08 03:11:12,235 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:11:15,617 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:11:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:11:15,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:11:15,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2019-09-08 03:11:15,703 INFO L454 AbstractCegarLoop]: Interpolant automaton has 83 states [2019-09-08 03:11:15,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2019-09-08 03:11:15,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2019-09-08 03:11:15,704 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 83 states. [2019-09-08 03:11:20,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:11:20,221 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2019-09-08 03:11:20,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-09-08 03:11:20,222 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 90 [2019-09-08 03:11:20,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:11:20,223 INFO L225 Difference]: With dead ends: 95 [2019-09-08 03:11:20,223 INFO L226 Difference]: Without dead ends: 92 [2019-09-08 03:11:20,223 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=167, Invalid=6805, Unknown=0, NotChecked=0, Total=6972 [2019-09-08 03:11:20,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-09-08 03:11:20,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-09-08 03:11:20,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-09-08 03:11:20,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2019-09-08 03:11:20,233 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2019-09-08 03:11:20,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:11:20,233 INFO L475 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2019-09-08 03:11:20,233 INFO L476 AbstractCegarLoop]: Interpolant automaton has 83 states. [2019-09-08 03:11:20,233 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2019-09-08 03:11:20,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-08 03:11:20,233 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:11:20,234 INFO L399 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:11:20,234 INFO L418 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:11:20,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:11:20,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1659293952, now seen corresponding path program 75 times [2019-09-08 03:11:20,234 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:11:20,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:11:20,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:20,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:11:20,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:20,240 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:11:20,241 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:11:20,241 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) [2019-09-08 03:11:20,268 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:11:26,586 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2019-09-08 03:11:26,586 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:11:26,593 WARN L254 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 331 conjunts are in the unsatisfiable core [2019-09-08 03:11:26,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:11:29,739 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:11:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:11:29,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:11:29,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2019-09-08 03:11:29,826 INFO L454 AbstractCegarLoop]: Interpolant automaton has 84 states [2019-09-08 03:11:29,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2019-09-08 03:11:29,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2019-09-08 03:11:29,827 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 84 states. [2019-09-08 03:11:34,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:11:34,472 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2019-09-08 03:11:34,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2019-09-08 03:11:34,472 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 91 [2019-09-08 03:11:34,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:11:34,473 INFO L225 Difference]: With dead ends: 96 [2019-09-08 03:11:34,473 INFO L226 Difference]: Without dead ends: 93 [2019-09-08 03:11:34,474 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=169, Invalid=6971, Unknown=0, NotChecked=0, Total=7140 [2019-09-08 03:11:34,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-09-08 03:11:34,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2019-09-08 03:11:34,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-09-08 03:11:34,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2019-09-08 03:11:34,481 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2019-09-08 03:11:34,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:11:34,481 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2019-09-08 03:11:34,481 INFO L476 AbstractCegarLoop]: Interpolant automaton has 84 states. [2019-09-08 03:11:34,481 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2019-09-08 03:11:34,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-09-08 03:11:34,482 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:11:34,482 INFO L399 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:11:34,482 INFO L418 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:11:34,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:11:34,482 INFO L82 PathProgramCache]: Analyzing trace with hash 101432582, now seen corresponding path program 76 times [2019-09-08 03:11:34,482 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:11:34,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:11:34,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:34,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:11:34,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:34,490 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:11:34,490 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:11:34,490 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 [2019-09-08 03:11:34,502 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:11:35,651 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:11:35,651 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:11:35,656 WARN L254 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 335 conjunts are in the unsatisfiable core [2019-09-08 03:11:35,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:11:38,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:11:38,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:11:38,939 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:11:38,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2019-09-08 03:11:38,940 INFO L454 AbstractCegarLoop]: Interpolant automaton has 85 states [2019-09-08 03:11:38,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2019-09-08 03:11:38,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2019-09-08 03:11:38,940 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 85 states. [2019-09-08 03:11:43,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:11:43,711 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2019-09-08 03:11:43,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2019-09-08 03:11:43,711 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 92 [2019-09-08 03:11:43,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:11:43,712 INFO L225 Difference]: With dead ends: 97 [2019-09-08 03:11:43,712 INFO L226 Difference]: Without dead ends: 94 [2019-09-08 03:11:43,713 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=171, Invalid=7139, Unknown=0, NotChecked=0, Total=7310 [2019-09-08 03:11:43,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-09-08 03:11:43,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-09-08 03:11:43,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-09-08 03:11:43,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2019-09-08 03:11:43,720 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2019-09-08 03:11:43,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:11:43,720 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2019-09-08 03:11:43,720 INFO L476 AbstractCegarLoop]: Interpolant automaton has 85 states. [2019-09-08 03:11:43,720 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2019-09-08 03:11:43,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-08 03:11:43,721 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:11:43,721 INFO L399 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:11:43,721 INFO L418 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:11:43,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:11:43,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1150619712, now seen corresponding path program 77 times [2019-09-08 03:11:43,722 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:11:43,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:11:43,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:43,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:11:43,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:43,728 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:11:43,728 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:11:43,728 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:11:43,741 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:11:44,178 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2019-09-08 03:11:44,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:11:44,187 WARN L254 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 339 conjunts are in the unsatisfiable core [2019-09-08 03:11:44,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:11:47,508 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:11:47,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:11:47,604 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:11:47,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2019-09-08 03:11:47,605 INFO L454 AbstractCegarLoop]: Interpolant automaton has 86 states [2019-09-08 03:11:47,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2019-09-08 03:11:47,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=7141, Unknown=0, NotChecked=0, Total=7310 [2019-09-08 03:11:47,606 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 86 states. [2019-09-08 03:11:52,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:11:52,490 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2019-09-08 03:11:52,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2019-09-08 03:11:52,490 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 93 [2019-09-08 03:11:52,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:11:52,491 INFO L225 Difference]: With dead ends: 98 [2019-09-08 03:11:52,491 INFO L226 Difference]: Without dead ends: 95 [2019-09-08 03:11:52,492 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=173, Invalid=7309, Unknown=0, NotChecked=0, Total=7482 [2019-09-08 03:11:52,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-09-08 03:11:52,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2019-09-08 03:11:52,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-09-08 03:11:52,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2019-09-08 03:11:52,499 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2019-09-08 03:11:52,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:11:52,500 INFO L475 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2019-09-08 03:11:52,500 INFO L476 AbstractCegarLoop]: Interpolant automaton has 86 states. [2019-09-08 03:11:52,500 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2019-09-08 03:11:52,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-09-08 03:11:52,500 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:11:52,500 INFO L399 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:11:52,501 INFO L418 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:11:52,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:11:52,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1309535162, now seen corresponding path program 78 times [2019-09-08 03:11:52,501 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:11:52,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:11:52,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:52,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:11:52,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:52,508 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:11:52,508 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:11:52,508 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:11:52,521 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:12:00,235 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2019-09-08 03:12:00,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:12:00,241 WARN L254 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 343 conjunts are in the unsatisfiable core [2019-09-08 03:12:00,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:12:03,663 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:12:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:12:03,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:12:03,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2019-09-08 03:12:03,758 INFO L454 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-09-08 03:12:03,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-09-08 03:12:03,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2019-09-08 03:12:03,758 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 87 states. [2019-09-08 03:12:08,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:12:08,805 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2019-09-08 03:12:08,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-09-08 03:12:08,806 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 94 [2019-09-08 03:12:08,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:12:08,807 INFO L225 Difference]: With dead ends: 99 [2019-09-08 03:12:08,807 INFO L226 Difference]: Without dead ends: 96 [2019-09-08 03:12:08,808 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=175, Invalid=7481, Unknown=0, NotChecked=0, Total=7656 [2019-09-08 03:12:08,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-09-08 03:12:08,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-09-08 03:12:08,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-09-08 03:12:08,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2019-09-08 03:12:08,815 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2019-09-08 03:12:08,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:12:08,815 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2019-09-08 03:12:08,815 INFO L476 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-09-08 03:12:08,815 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2019-09-08 03:12:08,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-09-08 03:12:08,816 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:12:08,816 INFO L399 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:12:08,816 INFO L418 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:12:08,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:12:08,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1940946816, now seen corresponding path program 79 times [2019-09-08 03:12:08,816 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:12:08,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:12:08,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:08,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:12:08,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:08,823 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:12:08,823 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:12:08,823 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:12:08,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:12:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:12:09,266 WARN L254 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 347 conjunts are in the unsatisfiable core [2019-09-08 03:12:09,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:12:12,718 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:12:12,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:12:12,810 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:12:12,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2019-09-08 03:12:12,810 INFO L454 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-09-08 03:12:12,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-09-08 03:12:12,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=7483, Unknown=0, NotChecked=0, Total=7656 [2019-09-08 03:12:12,811 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 88 states. [2019-09-08 03:12:17,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:12:17,917 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2019-09-08 03:12:17,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2019-09-08 03:12:17,917 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 95 [2019-09-08 03:12:17,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:12:17,918 INFO L225 Difference]: With dead ends: 100 [2019-09-08 03:12:17,918 INFO L226 Difference]: Without dead ends: 97 [2019-09-08 03:12:17,919 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=177, Invalid=7655, Unknown=0, NotChecked=0, Total=7832 [2019-09-08 03:12:17,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-09-08 03:12:17,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2019-09-08 03:12:17,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-09-08 03:12:17,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2019-09-08 03:12:17,927 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2019-09-08 03:12:17,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:12:17,927 INFO L475 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2019-09-08 03:12:17,927 INFO L476 AbstractCegarLoop]: Interpolant automaton has 88 states. [2019-09-08 03:12:17,927 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2019-09-08 03:12:17,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-08 03:12:17,927 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:12:17,927 INFO L399 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:12:17,928 INFO L418 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:12:17,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:12:17,928 INFO L82 PathProgramCache]: Analyzing trace with hash -39871610, now seen corresponding path program 80 times [2019-09-08 03:12:17,928 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:12:17,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:12:17,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:17,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:12:17,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:17,936 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:12:17,936 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:12:17,936 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:12:17,947 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:12:18,275 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:12:18,275 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:12:18,279 WARN L254 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 351 conjunts are in the unsatisfiable core [2019-09-08 03:12:18,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:12:21,816 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:12:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:12:21,918 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:12:21,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2019-09-08 03:12:21,919 INFO L454 AbstractCegarLoop]: Interpolant automaton has 89 states [2019-09-08 03:12:21,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2019-09-08 03:12:21,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2019-09-08 03:12:21,919 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 89 states. [2019-09-08 03:12:27,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:12:27,128 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2019-09-08 03:12:27,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-09-08 03:12:27,128 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 96 [2019-09-08 03:12:27,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:12:27,129 INFO L225 Difference]: With dead ends: 101 [2019-09-08 03:12:27,129 INFO L226 Difference]: Without dead ends: 98 [2019-09-08 03:12:27,130 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=179, Invalid=7831, Unknown=0, NotChecked=0, Total=8010 [2019-09-08 03:12:27,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-09-08 03:12:27,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-09-08 03:12:27,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-09-08 03:12:27,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2019-09-08 03:12:27,138 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2019-09-08 03:12:27,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:12:27,138 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2019-09-08 03:12:27,138 INFO L476 AbstractCegarLoop]: Interpolant automaton has 89 states. [2019-09-08 03:12:27,138 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2019-09-08 03:12:27,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-08 03:12:27,138 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:12:27,139 INFO L399 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:12:27,139 INFO L418 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:12:27,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:12:27,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1236082368, now seen corresponding path program 81 times [2019-09-08 03:12:27,139 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:12:27,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:12:27,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:27,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:12:27,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:27,146 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:12:27,146 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:12:27,146 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:12:27,178 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:12:34,677 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2019-09-08 03:12:34,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:12:34,685 WARN L254 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 355 conjunts are in the unsatisfiable core [2019-09-08 03:12:34,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:12:38,378 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:12:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:12:38,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:12:38,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2019-09-08 03:12:38,475 INFO L454 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-09-08 03:12:38,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-09-08 03:12:38,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=7833, Unknown=0, NotChecked=0, Total=8010 [2019-09-08 03:12:38,476 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 90 states. [2019-09-08 03:12:43,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:12:43,871 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2019-09-08 03:12:43,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2019-09-08 03:12:43,872 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 97 [2019-09-08 03:12:43,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:12:43,872 INFO L225 Difference]: With dead ends: 102 [2019-09-08 03:12:43,873 INFO L226 Difference]: Without dead ends: 99 [2019-09-08 03:12:43,873 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=181, Invalid=8009, Unknown=0, NotChecked=0, Total=8190 [2019-09-08 03:12:43,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-09-08 03:12:43,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2019-09-08 03:12:43,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-09-08 03:12:43,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2019-09-08 03:12:43,882 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2019-09-08 03:12:43,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:12:43,882 INFO L475 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2019-09-08 03:12:43,882 INFO L476 AbstractCegarLoop]: Interpolant automaton has 90 states. [2019-09-08 03:12:43,882 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2019-09-08 03:12:43,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-09-08 03:12:43,882 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:12:43,883 INFO L399 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:12:43,883 INFO L418 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:12:43,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:12:43,883 INFO L82 PathProgramCache]: Analyzing trace with hash 336089798, now seen corresponding path program 82 times [2019-09-08 03:12:43,883 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:12:43,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:12:43,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:43,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:12:43,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:43,891 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:12:43,891 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:12:43,891 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:12:43,907 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:12:45,218 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:12:45,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:12:45,223 WARN L254 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 359 conjunts are in the unsatisfiable core [2019-09-08 03:12:45,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:12:49,100 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:12:49,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:12:49,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:12:49,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2019-09-08 03:12:49,197 INFO L454 AbstractCegarLoop]: Interpolant automaton has 91 states [2019-09-08 03:12:49,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2019-09-08 03:12:49,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=8011, Unknown=0, NotChecked=0, Total=8190 [2019-09-08 03:12:49,198 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 91 states. [2019-09-08 03:12:54,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:12:54,673 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2019-09-08 03:12:54,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-09-08 03:12:54,673 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 98 [2019-09-08 03:12:54,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:12:54,673 INFO L225 Difference]: With dead ends: 103 [2019-09-08 03:12:54,674 INFO L226 Difference]: Without dead ends: 100 [2019-09-08 03:12:54,674 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=183, Invalid=8189, Unknown=0, NotChecked=0, Total=8372 [2019-09-08 03:12:54,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-09-08 03:12:54,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-09-08 03:12:54,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-09-08 03:12:54,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2019-09-08 03:12:54,681 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2019-09-08 03:12:54,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:12:54,682 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2019-09-08 03:12:54,682 INFO L476 AbstractCegarLoop]: Interpolant automaton has 91 states. [2019-09-08 03:12:54,682 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2019-09-08 03:12:54,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-09-08 03:12:54,682 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:12:54,682 INFO L399 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:12:54,682 INFO L418 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:12:54,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:12:54,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1828786688, now seen corresponding path program 83 times [2019-09-08 03:12:54,683 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:12:54,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:12:54,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:54,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:12:54,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:54,689 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:12:54,689 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:12:54,689 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:12:54,700 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:12:55,215 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2019-09-08 03:12:55,215 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:12:55,226 WARN L254 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 363 conjunts are in the unsatisfiable core [2019-09-08 03:12:55,227 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:12:58,967 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:12:59,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 03:12:59,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:12:59,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2019-09-08 03:12:59,063 INFO L454 AbstractCegarLoop]: Interpolant automaton has 92 states [2019-09-08 03:12:59,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2019-09-08 03:12:59,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=8191, Unknown=0, NotChecked=0, Total=8372 [2019-09-08 03:12:59,064 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 92 states. [2019-09-08 03:13:04,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:13:04,686 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2019-09-08 03:13:04,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-09-08 03:13:04,687 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 99 [2019-09-08 03:13:04,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:13:04,688 INFO L225 Difference]: With dead ends: 104 [2019-09-08 03:13:04,688 INFO L226 Difference]: Without dead ends: 101 [2019-09-08 03:13:04,688 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=185, Invalid=8371, Unknown=0, NotChecked=0, Total=8556 [2019-09-08 03:13:04,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-09-08 03:13:04,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2019-09-08 03:13:04,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-09-08 03:13:04,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2019-09-08 03:13:04,696 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2019-09-08 03:13:04,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:13:04,696 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2019-09-08 03:13:04,697 INFO L476 AbstractCegarLoop]: Interpolant automaton has 92 states. [2019-09-08 03:13:04,697 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2019-09-08 03:13:04,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-08 03:13:04,697 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:13:04,697 INFO L399 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:13:04,697 INFO L418 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:13:04,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:13:04,698 INFO L82 PathProgramCache]: Analyzing trace with hash 857750022, now seen corresponding path program 84 times [2019-09-08 03:13:04,698 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:13:04,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:13:04,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:04,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:13:04,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:04,706 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:13:04,706 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:13:04,706 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:13:04,739 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:13:13,507 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2019-09-08 03:13:13,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:13:13,513 WARN L254 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 367 conjunts are in the unsatisfiable core [2019-09-08 03:13:13,515 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:13:17,360 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:13:17,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:13:17,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:13:17,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2019-09-08 03:13:17,458 INFO L454 AbstractCegarLoop]: Interpolant automaton has 93 states [2019-09-08 03:13:17,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2019-09-08 03:13:17,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=8373, Unknown=0, NotChecked=0, Total=8556 [2019-09-08 03:13:17,458 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 93 states. [2019-09-08 03:13:23,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:13:23,166 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2019-09-08 03:13:23,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2019-09-08 03:13:23,167 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 100 [2019-09-08 03:13:23,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:13:23,168 INFO L225 Difference]: With dead ends: 105 [2019-09-08 03:13:23,168 INFO L226 Difference]: Without dead ends: 102 [2019-09-08 03:13:23,168 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=187, Invalid=8555, Unknown=0, NotChecked=0, Total=8742 [2019-09-08 03:13:23,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-09-08 03:13:23,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2019-09-08 03:13:23,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-09-08 03:13:23,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2019-09-08 03:13:23,176 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2019-09-08 03:13:23,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:13:23,176 INFO L475 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2019-09-08 03:13:23,177 INFO L476 AbstractCegarLoop]: Interpolant automaton has 93 states. [2019-09-08 03:13:23,177 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2019-09-08 03:13:23,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-08 03:13:23,177 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:13:23,177 INFO L399 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:13:23,178 INFO L418 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:13:23,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:13:23,178 INFO L82 PathProgramCache]: Analyzing trace with hash 820384448, now seen corresponding path program 85 times [2019-09-08 03:13:23,178 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:13:23,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:13:23,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:23,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:13:23,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:23,187 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:13:23,187 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:13:23,188 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:13:23,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:13:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:13:23,608 WARN L254 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 371 conjunts are in the unsatisfiable core [2019-09-08 03:13:23,610 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:13:27,727 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:13:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 03:13:27,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:13:27,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2019-09-08 03:13:27,836 INFO L454 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-09-08 03:13:27,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-09-08 03:13:27,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=8557, Unknown=0, NotChecked=0, Total=8742 [2019-09-08 03:13:27,837 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 94 states. [2019-09-08 03:13:33,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:13:33,777 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2019-09-08 03:13:33,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2019-09-08 03:13:33,778 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 101 [2019-09-08 03:13:33,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:13:33,779 INFO L225 Difference]: With dead ends: 106 [2019-09-08 03:13:33,780 INFO L226 Difference]: Without dead ends: 103 [2019-09-08 03:13:33,780 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=189, Invalid=8741, Unknown=0, NotChecked=0, Total=8930 [2019-09-08 03:13:33,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-09-08 03:13:33,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2019-09-08 03:13:33,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-09-08 03:13:33,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2019-09-08 03:13:33,789 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2019-09-08 03:13:33,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:13:33,789 INFO L475 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2019-09-08 03:13:33,790 INFO L476 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-09-08 03:13:33,790 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2019-09-08 03:13:33,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-09-08 03:13:33,790 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:13:33,790 INFO L399 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:13:33,790 INFO L418 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:13:33,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:13:33,791 INFO L82 PathProgramCache]: Analyzing trace with hash -337948346, now seen corresponding path program 86 times [2019-09-08 03:13:33,791 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:13:33,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:13:33,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:33,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:13:33,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:33,797 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:13:33,797 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:13:33,797 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:13:33,808 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:13:34,201 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:13:34,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:13:34,207 WARN L254 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 375 conjunts are in the unsatisfiable core [2019-09-08 03:13:34,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:13:38,229 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:13:38,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:13:38,346 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:13:38,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2019-09-08 03:13:38,347 INFO L454 AbstractCegarLoop]: Interpolant automaton has 95 states [2019-09-08 03:13:38,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2019-09-08 03:13:38,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=8743, Unknown=0, NotChecked=0, Total=8930 [2019-09-08 03:13:38,348 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 95 states. [2019-09-08 03:13:44,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:13:44,298 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2019-09-08 03:13:44,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-09-08 03:13:44,299 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 102 [2019-09-08 03:13:44,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:13:44,300 INFO L225 Difference]: With dead ends: 107 [2019-09-08 03:13:44,300 INFO L226 Difference]: Without dead ends: 104 [2019-09-08 03:13:44,300 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=191, Invalid=8929, Unknown=0, NotChecked=0, Total=9120 [2019-09-08 03:13:44,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-08 03:13:44,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2019-09-08 03:13:44,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-09-08 03:13:44,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2019-09-08 03:13:44,308 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2019-09-08 03:13:44,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:13:44,309 INFO L475 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2019-09-08 03:13:44,309 INFO L476 AbstractCegarLoop]: Interpolant automaton has 95 states. [2019-09-08 03:13:44,309 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2019-09-08 03:13:44,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-09-08 03:13:44,309 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:13:44,309 INFO L399 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:13:44,309 INFO L418 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:13:44,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:13:44,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1886526592, now seen corresponding path program 87 times [2019-09-08 03:13:44,310 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:13:44,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:13:44,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:44,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:13:44,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:44,316 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:13:44,316 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:13:44,316 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:13:44,330 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:13:52,824 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2019-09-08 03:13:52,824 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:13:52,830 WARN L254 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 379 conjunts are in the unsatisfiable core [2019-09-08 03:13:52,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:13:56,870 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:13:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:13:56,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:13:56,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2019-09-08 03:13:56,972 INFO L454 AbstractCegarLoop]: Interpolant automaton has 96 states [2019-09-08 03:13:56,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2019-09-08 03:13:56,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=8931, Unknown=0, NotChecked=0, Total=9120 [2019-09-08 03:13:56,973 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 96 states. [2019-09-08 03:14:03,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:14:03,025 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2019-09-08 03:14:03,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2019-09-08 03:14:03,026 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 103 [2019-09-08 03:14:03,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:14:03,027 INFO L225 Difference]: With dead ends: 108 [2019-09-08 03:14:03,027 INFO L226 Difference]: Without dead ends: 105 [2019-09-08 03:14:03,028 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=193, Invalid=9119, Unknown=0, NotChecked=0, Total=9312 [2019-09-08 03:14:03,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-09-08 03:14:03,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2019-09-08 03:14:03,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-09-08 03:14:03,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2019-09-08 03:14:03,038 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2019-09-08 03:14:03,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:14:03,039 INFO L475 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2019-09-08 03:14:03,039 INFO L476 AbstractCegarLoop]: Interpolant automaton has 96 states. [2019-09-08 03:14:03,039 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2019-09-08 03:14:03,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-09-08 03:14:03,040 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:14:03,040 INFO L399 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:14:03,040 INFO L418 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:14:03,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:14:03,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1647155334, now seen corresponding path program 88 times [2019-09-08 03:14:03,040 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:14:03,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:14:03,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:14:03,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:14:03,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:14:03,048 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:14:03,049 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:14:03,049 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:14:03,075 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:14:04,569 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:14:04,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:14:04,575 WARN L254 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 383 conjunts are in the unsatisfiable core [2019-09-08 03:14:04,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:14:08,685 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:14:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:14:08,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:14:08,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2019-09-08 03:14:08,784 INFO L454 AbstractCegarLoop]: Interpolant automaton has 97 states [2019-09-08 03:14:08,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2019-09-08 03:14:08,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=9121, Unknown=0, NotChecked=0, Total=9312 [2019-09-08 03:14:08,784 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 97 states. [2019-09-08 03:14:14,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:14:14,972 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2019-09-08 03:14:14,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2019-09-08 03:14:14,972 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 104 [2019-09-08 03:14:14,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:14:14,974 INFO L225 Difference]: With dead ends: 109 [2019-09-08 03:14:14,974 INFO L226 Difference]: Without dead ends: 106 [2019-09-08 03:14:14,975 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=195, Invalid=9311, Unknown=0, NotChecked=0, Total=9506 [2019-09-08 03:14:14,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-09-08 03:14:14,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2019-09-08 03:14:14,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-08 03:14:14,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2019-09-08 03:14:14,984 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2019-09-08 03:14:14,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:14:14,984 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2019-09-08 03:14:14,985 INFO L476 AbstractCegarLoop]: Interpolant automaton has 97 states. [2019-09-08 03:14:14,985 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2019-09-08 03:14:14,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-09-08 03:14:14,985 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:14:14,985 INFO L399 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:14:14,986 INFO L418 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:14:14,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:14:14,986 INFO L82 PathProgramCache]: Analyzing trace with hash -477854656, now seen corresponding path program 89 times [2019-09-08 03:14:14,986 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:14:14,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:14:14,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:14:14,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:14:14,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:14:14,995 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:14:14,995 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:14:14,995 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:14:15,011 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:14:15,583 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2019-09-08 03:14:15,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:14:15,594 WARN L254 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 387 conjunts are in the unsatisfiable core [2019-09-08 03:14:15,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:14:19,850 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:14:19,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:14:19,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:14:19,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2019-09-08 03:14:19,956 INFO L454 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-09-08 03:14:19,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-09-08 03:14:19,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=9313, Unknown=0, NotChecked=0, Total=9506 [2019-09-08 03:14:19,957 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 98 states. [2019-09-08 03:14:26,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:14:26,303 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2019-09-08 03:14:26,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2019-09-08 03:14:26,304 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 105 [2019-09-08 03:14:26,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:14:26,305 INFO L225 Difference]: With dead ends: 110 [2019-09-08 03:14:26,305 INFO L226 Difference]: Without dead ends: 107 [2019-09-08 03:14:26,306 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=197, Invalid=9505, Unknown=0, NotChecked=0, Total=9702 [2019-09-08 03:14:26,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-09-08 03:14:26,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2019-09-08 03:14:26,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-09-08 03:14:26,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2019-09-08 03:14:26,316 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2019-09-08 03:14:26,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:14:26,317 INFO L475 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2019-09-08 03:14:26,317 INFO L476 AbstractCegarLoop]: Interpolant automaton has 98 states. [2019-09-08 03:14:26,317 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2019-09-08 03:14:26,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-09-08 03:14:26,317 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:14:26,318 INFO L399 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:14:26,318 INFO L418 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:14:26,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:14:26,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1928654906, now seen corresponding path program 90 times [2019-09-08 03:14:26,318 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:14:26,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:14:26,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:14:26,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:14:26,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:14:26,326 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:14:26,327 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:14:26,327 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:14:26,346 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:14:37,868 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2019-09-08 03:14:37,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:14:37,880 WARN L254 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 391 conjunts are in the unsatisfiable core [2019-09-08 03:14:37,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:14:42,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:14:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:14:42,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:14:42,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2019-09-08 03:14:42,353 INFO L454 AbstractCegarLoop]: Interpolant automaton has 99 states [2019-09-08 03:14:42,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2019-09-08 03:14:42,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=9507, Unknown=0, NotChecked=0, Total=9702 [2019-09-08 03:14:42,354 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 99 states. [2019-09-08 03:14:48,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:14:48,808 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2019-09-08 03:14:48,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2019-09-08 03:14:48,808 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 106 [2019-09-08 03:14:48,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:14:48,809 INFO L225 Difference]: With dead ends: 111 [2019-09-08 03:14:48,810 INFO L226 Difference]: Without dead ends: 108 [2019-09-08 03:14:48,810 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=199, Invalid=9701, Unknown=0, NotChecked=0, Total=9900 [2019-09-08 03:14:48,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-09-08 03:14:48,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2019-09-08 03:14:48,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-09-08 03:14:48,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2019-09-08 03:14:48,821 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2019-09-08 03:14:48,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:14:48,821 INFO L475 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2019-09-08 03:14:48,821 INFO L476 AbstractCegarLoop]: Interpolant automaton has 99 states. [2019-09-08 03:14:48,821 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2019-09-08 03:14:48,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-08 03:14:48,822 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:14:48,822 INFO L399 BasicCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:14:48,822 INFO L418 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:14:48,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:14:48,823 INFO L82 PathProgramCache]: Analyzing trace with hash 341177600, now seen corresponding path program 91 times [2019-09-08 03:14:48,823 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:14:48,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:14:48,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:14:48,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:14:48,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:14:48,831 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:14:48,831 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:14:48,831 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:14:48,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:14:49,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:14:49,285 WARN L254 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 395 conjunts are in the unsatisfiable core [2019-09-08 03:14:49,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:14:53,699 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:14:53,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:14:53,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:14:53,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2019-09-08 03:14:53,802 INFO L454 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-09-08 03:14:53,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-09-08 03:14:53,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=9703, Unknown=0, NotChecked=0, Total=9900 [2019-09-08 03:14:53,803 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 100 states. [2019-09-08 03:15:00,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:15:00,419 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2019-09-08 03:15:00,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2019-09-08 03:15:00,420 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 107 [2019-09-08 03:15:00,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:15:00,421 INFO L225 Difference]: With dead ends: 112 [2019-09-08 03:15:00,421 INFO L226 Difference]: Without dead ends: 109 [2019-09-08 03:15:00,421 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=201, Invalid=9899, Unknown=0, NotChecked=0, Total=10100 [2019-09-08 03:15:00,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-09-08 03:15:00,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2019-09-08 03:15:00,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-09-08 03:15:00,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2019-09-08 03:15:00,432 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2019-09-08 03:15:00,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:15:00,433 INFO L475 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2019-09-08 03:15:00,433 INFO L476 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-09-08 03:15:00,433 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2019-09-08 03:15:00,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-09-08 03:15:00,434 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:15:00,434 INFO L399 BasicCegarLoop]: trace histogram [92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:15:00,434 INFO L418 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:15:00,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:15:00,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1986508550, now seen corresponding path program 92 times [2019-09-08 03:15:00,434 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:15:00,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:15:00,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:15:00,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:15:00,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:15:00,443 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:15:00,443 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:15:00,443 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:15:00,466 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:15:00,908 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:15:00,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:15:00,913 WARN L254 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 399 conjunts are in the unsatisfiable core [2019-09-08 03:15:00,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:15:05,600 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:15:05,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:15:05,707 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:15:05,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2019-09-08 03:15:05,707 INFO L454 AbstractCegarLoop]: Interpolant automaton has 101 states [2019-09-08 03:15:05,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2019-09-08 03:15:05,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=9901, Unknown=0, NotChecked=0, Total=10100 [2019-09-08 03:15:05,708 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 101 states. [2019-09-08 03:15:12,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:15:12,430 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2019-09-08 03:15:12,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2019-09-08 03:15:12,430 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 108 [2019-09-08 03:15:12,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:15:12,431 INFO L225 Difference]: With dead ends: 113 [2019-09-08 03:15:12,431 INFO L226 Difference]: Without dead ends: 110 [2019-09-08 03:15:12,432 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=203, Invalid=10099, Unknown=0, NotChecked=0, Total=10302 [2019-09-08 03:15:12,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-09-08 03:15:12,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2019-09-08 03:15:12,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-09-08 03:15:12,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2019-09-08 03:15:12,440 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2019-09-08 03:15:12,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:15:12,440 INFO L475 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2019-09-08 03:15:12,440 INFO L476 AbstractCegarLoop]: Interpolant automaton has 101 states. [2019-09-08 03:15:12,440 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2019-09-08 03:15:12,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-08 03:15:12,441 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:15:12,441 INFO L399 BasicCegarLoop]: trace histogram [93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:15:12,441 INFO L418 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:15:12,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:15:12,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1452160448, now seen corresponding path program 93 times [2019-09-08 03:15:12,441 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:15:12,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:15:12,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:15:12,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:15:12,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:15:12,447 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:15:12,447 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:15:12,447 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:15:12,459 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:15:40,750 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2019-09-08 03:15:40,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:15:40,766 WARN L254 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 403 conjunts are in the unsatisfiable core [2019-09-08 03:15:40,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:15:45,367 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:15:45,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:15:45,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:15:45,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2019-09-08 03:15:45,483 INFO L454 AbstractCegarLoop]: Interpolant automaton has 102 states [2019-09-08 03:15:45,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2019-09-08 03:15:45,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=10101, Unknown=0, NotChecked=0, Total=10302 [2019-09-08 03:15:45,484 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 102 states. [2019-09-08 03:15:52,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:15:52,337 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2019-09-08 03:15:52,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2019-09-08 03:15:52,338 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 109 [2019-09-08 03:15:52,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:15:52,339 INFO L225 Difference]: With dead ends: 114 [2019-09-08 03:15:52,339 INFO L226 Difference]: Without dead ends: 111 [2019-09-08 03:15:52,340 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=205, Invalid=10301, Unknown=0, NotChecked=0, Total=10506 [2019-09-08 03:15:52,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-09-08 03:15:52,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2019-09-08 03:15:52,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-09-08 03:15:52,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2019-09-08 03:15:52,348 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2019-09-08 03:15:52,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:15:52,349 INFO L475 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2019-09-08 03:15:52,349 INFO L476 AbstractCegarLoop]: Interpolant automaton has 102 states. [2019-09-08 03:15:52,349 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2019-09-08 03:15:52,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-09-08 03:15:52,349 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:15:52,349 INFO L399 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:15:52,349 INFO L418 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:15:52,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:15:52,350 INFO L82 PathProgramCache]: Analyzing trace with hash 2067238470, now seen corresponding path program 94 times [2019-09-08 03:15:52,350 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:15:52,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:15:52,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:15:52,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:15:52,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:15:52,358 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:15:52,358 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:15:52,358 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:15:52,377 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:15:54,035 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:15:54,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:15:54,042 WARN L254 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 407 conjunts are in the unsatisfiable core [2019-09-08 03:15:54,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:15:58,713 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:15:58,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:15:58,838 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:15:58,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103] total 103 [2019-09-08 03:15:58,838 INFO L454 AbstractCegarLoop]: Interpolant automaton has 103 states [2019-09-08 03:15:58,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2019-09-08 03:15:58,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=10303, Unknown=0, NotChecked=0, Total=10506 [2019-09-08 03:15:58,839 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 103 states. [2019-09-08 03:16:05,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:16:05,843 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2019-09-08 03:16:05,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2019-09-08 03:16:05,843 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 110 [2019-09-08 03:16:05,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:16:05,844 INFO L225 Difference]: With dead ends: 115 [2019-09-08 03:16:05,844 INFO L226 Difference]: Without dead ends: 112 [2019-09-08 03:16:05,845 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=207, Invalid=10505, Unknown=0, NotChecked=0, Total=10712 [2019-09-08 03:16:05,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-09-08 03:16:05,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2019-09-08 03:16:05,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-09-08 03:16:05,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2019-09-08 03:16:05,853 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2019-09-08 03:16:05,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:16:05,853 INFO L475 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2019-09-08 03:16:05,854 INFO L476 AbstractCegarLoop]: Interpolant automaton has 103 states. [2019-09-08 03:16:05,854 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2019-09-08 03:16:05,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-09-08 03:16:05,854 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:16:05,854 INFO L399 BasicCegarLoop]: trace histogram [95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:16:05,854 INFO L418 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:16:05,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:16:05,855 INFO L82 PathProgramCache]: Analyzing trace with hash -340179328, now seen corresponding path program 95 times [2019-09-08 03:16:05,855 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:16:05,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:16:05,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:16:05,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:16:05,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:16:05,862 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:16:05,862 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:16:05,862 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:16:05,872 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:16:06,543 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2019-09-08 03:16:06,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:16:06,556 WARN L254 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 411 conjunts are in the unsatisfiable core [2019-09-08 03:16:06,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:16:11,295 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:16:11,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:16:11,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:16:11,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2019-09-08 03:16:11,408 INFO L454 AbstractCegarLoop]: Interpolant automaton has 104 states [2019-09-08 03:16:11,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2019-09-08 03:16:11,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=10507, Unknown=0, NotChecked=0, Total=10712 [2019-09-08 03:16:11,408 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 104 states. [2019-09-08 03:16:18,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:16:18,474 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2019-09-08 03:16:18,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2019-09-08 03:16:18,475 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 111 [2019-09-08 03:16:18,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:16:18,476 INFO L225 Difference]: With dead ends: 116 [2019-09-08 03:16:18,476 INFO L226 Difference]: Without dead ends: 113 [2019-09-08 03:16:18,477 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=209, Invalid=10711, Unknown=0, NotChecked=0, Total=10920 [2019-09-08 03:16:18,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-09-08 03:16:18,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-09-08 03:16:18,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-09-08 03:16:18,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2019-09-08 03:16:18,485 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2019-09-08 03:16:18,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:16:18,486 INFO L475 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2019-09-08 03:16:18,486 INFO L476 AbstractCegarLoop]: Interpolant automaton has 104 states. [2019-09-08 03:16:18,486 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2019-09-08 03:16:18,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-08 03:16:18,487 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:16:18,487 INFO L399 BasicCegarLoop]: trace histogram [96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:16:18,487 INFO L418 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:16:18,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:16:18,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1955687034, now seen corresponding path program 96 times [2019-09-08 03:16:18,487 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:16:18,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:16:18,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:16:18,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:16:18,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:16:18,494 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:16:18,495 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:16:18,495 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:16:18,529 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:16:34,113 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2019-09-08 03:16:34,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:16:34,121 WARN L254 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 415 conjunts are in the unsatisfiable core [2019-09-08 03:16:34,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:16:38,932 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:16:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:16:39,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:16:39,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105] total 105 [2019-09-08 03:16:39,048 INFO L454 AbstractCegarLoop]: Interpolant automaton has 105 states [2019-09-08 03:16:39,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2019-09-08 03:16:39,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=10713, Unknown=0, NotChecked=0, Total=10920 [2019-09-08 03:16:39,049 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 105 states. [2019-09-08 03:16:46,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:16:46,320 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2019-09-08 03:16:46,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2019-09-08 03:16:46,321 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 112 [2019-09-08 03:16:46,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:16:46,322 INFO L225 Difference]: With dead ends: 117 [2019-09-08 03:16:46,322 INFO L226 Difference]: Without dead ends: 114 [2019-09-08 03:16:46,322 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=211, Invalid=10919, Unknown=0, NotChecked=0, Total=11130 [2019-09-08 03:16:46,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-09-08 03:16:46,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2019-09-08 03:16:46,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-09-08 03:16:46,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2019-09-08 03:16:46,331 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2019-09-08 03:16:46,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:16:46,331 INFO L475 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2019-09-08 03:16:46,331 INFO L476 AbstractCegarLoop]: Interpolant automaton has 105 states. [2019-09-08 03:16:46,331 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2019-09-08 03:16:46,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-09-08 03:16:46,332 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:16:46,332 INFO L399 BasicCegarLoop]: trace histogram [97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:16:46,332 INFO L418 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:16:46,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:16:46,332 INFO L82 PathProgramCache]: Analyzing trace with hash -496818368, now seen corresponding path program 97 times [2019-09-08 03:16:46,332 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:16:46,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:16:46,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:16:46,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:16:46,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:16:46,340 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:16:46,340 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:16:46,340 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:16:46,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:16:46,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:16:46,903 WARN L254 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 419 conjunts are in the unsatisfiable core [2019-09-08 03:16:46,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:16:51,859 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:16:51,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:16:51,970 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:16:51,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2019-09-08 03:16:51,971 INFO L454 AbstractCegarLoop]: Interpolant automaton has 106 states [2019-09-08 03:16:51,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2019-09-08 03:16:51,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=10921, Unknown=0, NotChecked=0, Total=11130 [2019-09-08 03:16:51,972 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 106 states. [2019-09-08 03:16:59,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:16:59,426 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2019-09-08 03:16:59,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2019-09-08 03:16:59,426 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 113 [2019-09-08 03:16:59,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:16:59,427 INFO L225 Difference]: With dead ends: 118 [2019-09-08 03:16:59,427 INFO L226 Difference]: Without dead ends: 115 [2019-09-08 03:16:59,427 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=213, Invalid=11129, Unknown=0, NotChecked=0, Total=11342 [2019-09-08 03:16:59,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-09-08 03:16:59,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2019-09-08 03:16:59,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-09-08 03:16:59,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2019-09-08 03:16:59,435 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2019-09-08 03:16:59,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:16:59,435 INFO L475 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2019-09-08 03:16:59,436 INFO L476 AbstractCegarLoop]: Interpolant automaton has 106 states. [2019-09-08 03:16:59,436 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2019-09-08 03:16:59,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-09-08 03:16:59,436 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:16:59,436 INFO L399 BasicCegarLoop]: trace histogram [98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:16:59,436 INFO L418 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:16:59,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:16:59,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1778437318, now seen corresponding path program 98 times [2019-09-08 03:16:59,437 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:16:59,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:16:59,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:16:59,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:16:59,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:16:59,444 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:16:59,445 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:16:59,445 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:16:59,457 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:16:59,976 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:16:59,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:16:59,984 WARN L254 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 423 conjunts are in the unsatisfiable core [2019-09-08 03:16:59,985 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:17:05,011 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:17:05,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:17:05,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:17:05,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107] total 107 [2019-09-08 03:17:05,122 INFO L454 AbstractCegarLoop]: Interpolant automaton has 107 states [2019-09-08 03:17:05,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2019-09-08 03:17:05,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=11131, Unknown=0, NotChecked=0, Total=11342 [2019-09-08 03:17:05,123 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 107 states. [2019-09-08 03:17:12,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:17:12,654 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2019-09-08 03:17:12,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2019-09-08 03:17:12,655 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 114 [2019-09-08 03:17:12,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:17:12,656 INFO L225 Difference]: With dead ends: 119 [2019-09-08 03:17:12,656 INFO L226 Difference]: Without dead ends: 116 [2019-09-08 03:17:12,656 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=215, Invalid=11341, Unknown=0, NotChecked=0, Total=11556 [2019-09-08 03:17:12,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-09-08 03:17:12,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2019-09-08 03:17:12,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-09-08 03:17:12,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2019-09-08 03:17:12,667 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2019-09-08 03:17:12,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:17:12,667 INFO L475 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2019-09-08 03:17:12,667 INFO L476 AbstractCegarLoop]: Interpolant automaton has 107 states. [2019-09-08 03:17:12,667 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2019-09-08 03:17:12,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-08 03:17:12,668 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:17:12,668 INFO L399 BasicCegarLoop]: trace histogram [99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:17:12,668 INFO L418 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:17:12,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:17:12,668 INFO L82 PathProgramCache]: Analyzing trace with hash -703080448, now seen corresponding path program 99 times [2019-09-08 03:17:12,668 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:17:12,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:17:12,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:12,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:17:12,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:12,677 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:17:12,677 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:17:12,677 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:17:12,687 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:17:35,775 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2019-09-08 03:17:35,775 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:17:35,784 WARN L254 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 427 conjunts are in the unsatisfiable core [2019-09-08 03:17:35,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:17:40,857 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:17:40,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:17:40,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:17:40,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2019-09-08 03:17:40,988 INFO L454 AbstractCegarLoop]: Interpolant automaton has 108 states [2019-09-08 03:17:40,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2019-09-08 03:17:40,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=11343, Unknown=0, NotChecked=0, Total=11556 [2019-09-08 03:17:40,989 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 108 states. [2019-09-08 03:17:48,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:17:48,650 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2019-09-08 03:17:48,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2019-09-08 03:17:48,651 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 115 [2019-09-08 03:17:48,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:17:48,652 INFO L225 Difference]: With dead ends: 120 [2019-09-08 03:17:48,652 INFO L226 Difference]: Without dead ends: 117 [2019-09-08 03:17:48,653 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=217, Invalid=11555, Unknown=0, NotChecked=0, Total=11772 [2019-09-08 03:17:48,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-09-08 03:17:48,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2019-09-08 03:17:48,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-09-08 03:17:48,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2019-09-08 03:17:48,665 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 115 [2019-09-08 03:17:48,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:17:48,665 INFO L475 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2019-09-08 03:17:48,665 INFO L476 AbstractCegarLoop]: Interpolant automaton has 108 states. [2019-09-08 03:17:48,666 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2019-09-08 03:17:48,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-09-08 03:17:48,666 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:17:48,666 INFO L399 BasicCegarLoop]: trace histogram [100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:17:48,667 INFO L418 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:17:48,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:17:48,667 INFO L82 PathProgramCache]: Analyzing trace with hash -320719866, now seen corresponding path program 100 times [2019-09-08 03:17:48,667 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:17:48,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:17:48,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:48,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:17:48,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:48,676 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:17:48,676 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:17:48,676 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:17:48,692 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:17:50,563 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:17:50,564 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:17:50,570 WARN L254 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 431 conjunts are in the unsatisfiable core [2019-09-08 03:17:50,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:17:55,802 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:17:55,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:17:55,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:17:55,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109] total 109 [2019-09-08 03:17:55,915 INFO L454 AbstractCegarLoop]: Interpolant automaton has 109 states [2019-09-08 03:17:55,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2019-09-08 03:17:55,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=11557, Unknown=0, NotChecked=0, Total=11772 [2019-09-08 03:17:55,916 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 109 states. [2019-09-08 03:18:03,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:18:03,763 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2019-09-08 03:18:03,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2019-09-08 03:18:03,764 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 116 [2019-09-08 03:18:03,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:18:03,765 INFO L225 Difference]: With dead ends: 121 [2019-09-08 03:18:03,765 INFO L226 Difference]: Without dead ends: 118 [2019-09-08 03:18:03,766 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=219, Invalid=11771, Unknown=0, NotChecked=0, Total=11990 [2019-09-08 03:18:03,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-09-08 03:18:03,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2019-09-08 03:18:03,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-09-08 03:18:03,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2019-09-08 03:18:03,775 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 116 [2019-09-08 03:18:03,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:18:03,775 INFO L475 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2019-09-08 03:18:03,775 INFO L476 AbstractCegarLoop]: Interpolant automaton has 109 states. [2019-09-08 03:18:03,775 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2019-09-08 03:18:03,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-09-08 03:18:03,776 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:18:03,776 INFO L399 BasicCegarLoop]: trace histogram [101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:18:03,776 INFO L418 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:18:03,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:18:03,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1352443712, now seen corresponding path program 101 times [2019-09-08 03:18:03,776 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:18:03,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:18:03,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:03,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:18:03,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:03,785 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:18:03,786 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:18:03,786 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:18:03,810 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:18:04,584 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2019-09-08 03:18:04,584 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:18:04,591 WARN L254 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 435 conjunts are in the unsatisfiable core [2019-09-08 03:18:04,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:18:10,010 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:18:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 03:18:10,129 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:18:10,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2019-09-08 03:18:10,130 INFO L454 AbstractCegarLoop]: Interpolant automaton has 110 states [2019-09-08 03:18:10,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2019-09-08 03:18:10,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=11773, Unknown=0, NotChecked=0, Total=11990 [2019-09-08 03:18:10,131 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 110 states. [2019-09-08 03:18:18,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:18:18,211 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2019-09-08 03:18:18,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2019-09-08 03:18:18,212 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 117 [2019-09-08 03:18:18,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:18:18,213 INFO L225 Difference]: With dead ends: 122 [2019-09-08 03:18:18,213 INFO L226 Difference]: Without dead ends: 119 [2019-09-08 03:18:18,213 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=221, Invalid=11989, Unknown=0, NotChecked=0, Total=12210 [2019-09-08 03:18:18,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-09-08 03:18:18,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2019-09-08 03:18:18,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-09-08 03:18:18,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2019-09-08 03:18:18,223 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 117 [2019-09-08 03:18:18,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:18:18,223 INFO L475 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2019-09-08 03:18:18,223 INFO L476 AbstractCegarLoop]: Interpolant automaton has 110 states. [2019-09-08 03:18:18,223 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2019-09-08 03:18:18,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-09-08 03:18:18,223 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:18:18,224 INFO L399 BasicCegarLoop]: trace histogram [102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:18:18,224 INFO L418 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:18:18,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:18:18,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1023855430, now seen corresponding path program 102 times [2019-09-08 03:18:18,224 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:18:18,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:18:18,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:18,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:18:18,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:18,231 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:18:18,231 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:18:18,231 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:18:18,241 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:18:39,476 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2019-09-08 03:18:39,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:18:39,485 WARN L254 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 439 conjunts are in the unsatisfiable core [2019-09-08 03:18:39,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:18:44,850 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:18:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:18:44,969 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:18:44,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111] total 111 [2019-09-08 03:18:44,970 INFO L454 AbstractCegarLoop]: Interpolant automaton has 111 states [2019-09-08 03:18:44,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2019-09-08 03:18:44,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=11991, Unknown=0, NotChecked=0, Total=12210 [2019-09-08 03:18:44,971 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 111 states. [2019-09-08 03:18:53,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:18:53,084 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2019-09-08 03:18:53,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2019-09-08 03:18:53,084 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 118 [2019-09-08 03:18:53,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:18:53,085 INFO L225 Difference]: With dead ends: 123 [2019-09-08 03:18:53,085 INFO L226 Difference]: Without dead ends: 120 [2019-09-08 03:18:53,086 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=223, Invalid=12209, Unknown=0, NotChecked=0, Total=12432 [2019-09-08 03:18:53,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-09-08 03:18:53,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2019-09-08 03:18:53,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-09-08 03:18:53,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2019-09-08 03:18:53,097 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 118 [2019-09-08 03:18:53,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:18:53,098 INFO L475 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2019-09-08 03:18:53,098 INFO L476 AbstractCegarLoop]: Interpolant automaton has 111 states. [2019-09-08 03:18:53,098 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2019-09-08 03:18:53,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-09-08 03:18:53,098 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:18:53,099 INFO L399 BasicCegarLoop]: trace histogram [103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:18:53,099 INFO L418 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:18:53,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:18:53,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1674684800, now seen corresponding path program 103 times [2019-09-08 03:18:53,099 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:18:53,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:18:53,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:53,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:18:53,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:53,108 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:18:53,108 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:18:53,108 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:18:53,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:18:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:18:53,724 WARN L254 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 443 conjunts are in the unsatisfiable core [2019-09-08 03:18:53,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:18:59,226 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:18:59,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:18:59,346 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:18:59,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2019-09-08 03:18:59,346 INFO L454 AbstractCegarLoop]: Interpolant automaton has 112 states [2019-09-08 03:18:59,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2019-09-08 03:18:59,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=12211, Unknown=0, NotChecked=0, Total=12432 [2019-09-08 03:18:59,347 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 112 states. [2019-09-08 03:19:07,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:19:07,670 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2019-09-08 03:19:07,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2019-09-08 03:19:07,671 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 119 [2019-09-08 03:19:07,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:19:07,671 INFO L225 Difference]: With dead ends: 124 [2019-09-08 03:19:07,672 INFO L226 Difference]: Without dead ends: 121 [2019-09-08 03:19:07,672 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=225, Invalid=12431, Unknown=0, NotChecked=0, Total=12656 [2019-09-08 03:19:07,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-09-08 03:19:07,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2019-09-08 03:19:07,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-09-08 03:19:07,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2019-09-08 03:19:07,683 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 119 [2019-09-08 03:19:07,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:19:07,683 INFO L475 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2019-09-08 03:19:07,683 INFO L476 AbstractCegarLoop]: Interpolant automaton has 112 states. [2019-09-08 03:19:07,683 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2019-09-08 03:19:07,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-09-08 03:19:07,683 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:19:07,683 INFO L399 BasicCegarLoop]: trace histogram [104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:19:07,684 INFO L418 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:19:07,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:19:07,684 INFO L82 PathProgramCache]: Analyzing trace with hash 375558790, now seen corresponding path program 104 times [2019-09-08 03:19:07,684 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:19:07,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:19:07,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:19:07,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:19:07,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:19:07,690 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:19:07,690 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:19:07,690 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:19:07,699 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:19:08,298 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:19:08,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:19:08,304 WARN L254 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 447 conjunts are in the unsatisfiable core [2019-09-08 03:19:08,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:19:13,813 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:19:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:19:13,938 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:19:13,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113] total 113 [2019-09-08 03:19:13,939 INFO L454 AbstractCegarLoop]: Interpolant automaton has 113 states [2019-09-08 03:19:13,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2019-09-08 03:19:13,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=12433, Unknown=0, NotChecked=0, Total=12656 [2019-09-08 03:19:13,940 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 113 states. [2019-09-08 03:19:22,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:19:22,348 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2019-09-08 03:19:22,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2019-09-08 03:19:22,348 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 120 [2019-09-08 03:19:22,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:19:22,349 INFO L225 Difference]: With dead ends: 125 [2019-09-08 03:19:22,349 INFO L226 Difference]: Without dead ends: 122 [2019-09-08 03:19:22,350 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=227, Invalid=12655, Unknown=0, NotChecked=0, Total=12882 [2019-09-08 03:19:22,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-09-08 03:19:22,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2019-09-08 03:19:22,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-09-08 03:19:22,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2019-09-08 03:19:22,359 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 120 [2019-09-08 03:19:22,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:19:22,359 INFO L475 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2019-09-08 03:19:22,359 INFO L476 AbstractCegarLoop]: Interpolant automaton has 113 states. [2019-09-08 03:19:22,359 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2019-09-08 03:19:22,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-08 03:19:22,359 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:19:22,359 INFO L399 BasicCegarLoop]: trace histogram [105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:19:22,360 INFO L418 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:19:22,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:19:22,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1242641856, now seen corresponding path program 105 times [2019-09-08 03:19:22,360 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:19:22,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:19:22,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:19:22,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:19:22,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:19:22,368 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-08 03:19:22,368 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-08 03:19:22,369 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-08 03:19:22,401 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-08 03:19:54,355 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2019-09-08 03:19:54,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:19:54,363 WARN L254 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 451 conjunts are in the unsatisfiable core [2019-09-08 03:19:54,365 INFO L279 TraceCheckSpWp]: Computing forward predicates...