java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/ps4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 12:29:45,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 12:29:45,695 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 12:29:45,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-05 12:29:45,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 12:29:45,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 12:29:45,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 12:29:45,743 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-05 12:29:45,757 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 12:29:45,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 12:29:45,758 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-05 12:29:45,759 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-05 12:29:45,759 INFO L138 SettingsManager]: * Use SBE=true [2019-09-05 12:29:45,759 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 12:29:45,759 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 12:29:45,759 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-05 12:29:45,760 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 12:29:45,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 12:29:45,760 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 12:29:45,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 12:29:45,760 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 12:29:45,761 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 12:29:45,761 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 12:29:45,761 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-05 12:29:45,761 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 12:29:45,761 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 12:29:45,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 12:29:45,762 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-05 12:29:45,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-05 12:29:45,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 12:29:45,762 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 12:29:45,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 12:29:45,763 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-05 12:29:45,763 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-05 12:29:45,763 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 12:29:45,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 12:29:45,764 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-05 12:29:45,790 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 12:29:45,809 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 12:29:45,815 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 12:29:45,819 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 12:29:45,820 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 12:29:45,821 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps4.c [2019-09-05 12:29:45,891 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdaa5e984/4068d3df564b48a19dcc134d0b563140/FLAG8bd7de207 [2019-09-05 12:29:46,311 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 12:29:46,313 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps4.c [2019-09-05 12:29:46,320 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdaa5e984/4068d3df564b48a19dcc134d0b563140/FLAG8bd7de207 [2019-09-05 12:29:46,712 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdaa5e984/4068d3df564b48a19dcc134d0b563140 [2019-09-05 12:29:46,722 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 12:29:46,723 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 12:29:46,725 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 12:29:46,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 12:29:46,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 12:29:46,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:29:46" (1/1) ... [2019-09-05 12:29:46,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35f89b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:29:46, skipping insertion in model container [2019-09-05 12:29:46,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:29:46" (1/1) ... [2019-09-05 12:29:46,739 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 12:29:46,757 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 12:29:46,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:29:46,911 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 12:29:46,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:29:46,942 INFO L192 MainTranslator]: Completed translation [2019-09-05 12:29:46,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:29:46 WrapperNode [2019-09-05 12:29:46,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 12:29:46,943 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 12:29:46,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 12:29:46,944 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 12:29:47,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:29:46" (1/1) ... [2019-09-05 12:29:47,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:29:46" (1/1) ... [2019-09-05 12:29:47,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:29:46" (1/1) ... [2019-09-05 12:29:47,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:29:46" (1/1) ... [2019-09-05 12:29:47,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:29:46" (1/1) ... [2019-09-05 12:29:47,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:29:46" (1/1) ... [2019-09-05 12:29:47,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:29:46" (1/1) ... [2019-09-05 12:29:47,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 12:29:47,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 12:29:47,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 12:29:47,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 12:29:47,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:29:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 12:29:47,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 12:29:47,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 12:29:47,119 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-05 12:29:47,119 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 12:29:47,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 12:29:47,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-05 12:29:47,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-05 12:29:47,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 12:29:47,119 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 12:29:47,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 12:29:47,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 12:29:47,303 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 12:29:47,303 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-05 12:29:47,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:29:47 BoogieIcfgContainer [2019-09-05 12:29:47,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 12:29:47,307 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 12:29:47,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 12:29:47,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 12:29:47,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 12:29:46" (1/3) ... [2019-09-05 12:29:47,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@228fe7a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:29:47, skipping insertion in model container [2019-09-05 12:29:47,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:29:46" (2/3) ... [2019-09-05 12:29:47,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@228fe7a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:29:47, skipping insertion in model container [2019-09-05 12:29:47,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:29:47" (3/3) ... [2019-09-05 12:29:47,323 INFO L109 eAbstractionObserver]: Analyzing ICFG ps4.c [2019-09-05 12:29:47,345 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 12:29:47,359 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 12:29:47,380 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 12:29:47,415 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-05 12:29:47,415 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 12:29:47,416 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-05 12:29:47,416 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 12:29:47,416 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 12:29:47,416 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 12:29:47,416 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 12:29:47,416 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 12:29:47,417 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 12:29:47,436 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-09-05 12:29:47,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-05 12:29:47,442 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:47,443 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:47,445 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:47,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:47,451 INFO L82 PathProgramCache]: Analyzing trace with hash -148746498, now seen corresponding path program 1 times [2019-09-05 12:29:47,453 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:47,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:47,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:47,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:29:47,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:47,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:29:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:29:47,554 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:29:47,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-05 12:29:47,557 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-05 12:29:47,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-05 12:29:47,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:29:47,569 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-09-05 12:29:47,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:47,590 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2019-09-05 12:29:47,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-05 12:29:47,591 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-05 12:29:47,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:47,601 INFO L225 Difference]: With dead ends: 37 [2019-09-05 12:29:47,602 INFO L226 Difference]: Without dead ends: 16 [2019-09-05 12:29:47,606 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:29:47,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-05 12:29:47,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-05 12:29:47,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-05 12:29:47,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-09-05 12:29:47,668 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-09-05 12:29:47,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:47,669 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-09-05 12:29:47,669 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-05 12:29:47,670 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-09-05 12:29:47,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-05 12:29:47,673 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:47,673 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:47,673 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:47,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:47,675 INFO L82 PathProgramCache]: Analyzing trace with hash -156194248, now seen corresponding path program 1 times [2019-09-05 12:29:47,676 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:47,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:47,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:47,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:29:47,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:47,691 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:47,691 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:47,691 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:29:47,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:29:47,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-05 12:29:47,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:47,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:29:47,788 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:29:47,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-05 12:29:47,790 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 12:29:47,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 12:29:47,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-05 12:29:47,791 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-09-05 12:29:47,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:47,874 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-09-05 12:29:47,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-05 12:29:47,874 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-05 12:29:47,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:47,875 INFO L225 Difference]: With dead ends: 27 [2019-09-05 12:29:47,876 INFO L226 Difference]: Without dead ends: 23 [2019-09-05 12:29:47,877 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:29:47,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-05 12:29:47,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-05 12:29:47,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-05 12:29:47,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-09-05 12:29:47,886 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2019-09-05 12:29:47,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:47,887 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-09-05 12:29:47,887 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 12:29:47,887 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-09-05 12:29:47,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-05 12:29:47,888 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:47,888 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:47,888 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:47,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:47,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1425845280, now seen corresponding path program 1 times [2019-09-05 12:29:47,889 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:47,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:47,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:47,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:29:47,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:47,895 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:47,895 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:47,895 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) [2019-09-05 12:29:47,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:29:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:29:47,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:47,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:48,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:29:48,037 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:48,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-05 12:29:48,038 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-05 12:29:48,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-05 12:29:48,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:29:48,039 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 8 states. [2019-09-05 12:29:48,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:48,231 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-09-05 12:29:48,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-05 12:29:48,231 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-09-05 12:29:48,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:48,233 INFO L225 Difference]: With dead ends: 34 [2019-09-05 12:29:48,233 INFO L226 Difference]: Without dead ends: 31 [2019-09-05 12:29:48,234 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:29:48,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-05 12:29:48,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-09-05 12:29:48,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-05 12:29:48,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2019-09-05 12:29:48,245 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 17 [2019-09-05 12:29:48,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:48,246 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2019-09-05 12:29:48,246 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-05 12:29:48,246 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-09-05 12:29:48,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-05 12:29:48,247 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:48,247 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:48,248 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:48,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:48,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1323071607, now seen corresponding path program 1 times [2019-09-05 12:29:48,248 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:48,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:48,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:48,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:29:48,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:48,254 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:48,254 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:48,255 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:29:48,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:29:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:48,296 WARN L254 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-05 12:29:48,299 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:48,430 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-05 12:29:48,470 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:48,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-05 12:29:48,470 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 12:29:48,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 12:29:48,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:29:48,471 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 10 states. [2019-09-05 12:29:48,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:48,772 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2019-09-05 12:29:48,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-05 12:29:48,772 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-09-05 12:29:48,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:48,774 INFO L225 Difference]: With dead ends: 37 [2019-09-05 12:29:48,774 INFO L226 Difference]: Without dead ends: 30 [2019-09-05 12:29:48,774 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-09-05 12:29:48,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-05 12:29:48,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-05 12:29:48,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-05 12:29:48,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-09-05 12:29:48,783 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2019-09-05 12:29:48,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:48,783 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-09-05 12:29:48,783 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 12:29:48,783 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-09-05 12:29:48,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-05 12:29:48,785 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:48,786 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:48,786 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:48,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:48,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1905380040, now seen corresponding path program 2 times [2019-09-05 12:29:48,787 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:48,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:48,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:48,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:29:48,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:48,796 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:48,796 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:48,796 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:29:48,812 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:29:48,828 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:29:48,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:48,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-05 12:29:48,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-05 12:29:48,932 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:48,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-05 12:29:48,932 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-05 12:29:48,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-05 12:29:48,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-05 12:29:48,934 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 9 states. [2019-09-05 12:29:49,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:49,086 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2019-09-05 12:29:49,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-05 12:29:49,087 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-09-05 12:29:49,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:49,088 INFO L225 Difference]: With dead ends: 41 [2019-09-05 12:29:49,088 INFO L226 Difference]: Without dead ends: 38 [2019-09-05 12:29:49,089 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:29:49,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-05 12:29:49,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-09-05 12:29:49,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-05 12:29:49,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2019-09-05 12:29:49,104 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 24 [2019-09-05 12:29:49,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:49,105 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2019-09-05 12:29:49,105 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-05 12:29:49,105 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2019-09-05 12:29:49,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-05 12:29:49,109 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:49,109 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:49,110 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:49,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:49,110 INFO L82 PathProgramCache]: Analyzing trace with hash 450416527, now seen corresponding path program 2 times [2019-09-05 12:29:49,111 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:49,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:49,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:49,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:29:49,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:49,120 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:49,120 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:49,120 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:49,143 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:29:49,157 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:29:49,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:29:49,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-05 12:29:49,161 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:49,244 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-05 12:29:49,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:49,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-05 12:29:49,273 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 12:29:49,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 12:29:49,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:29:49,274 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 10 states. [2019-09-05 12:29:49,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:49,603 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2019-09-05 12:29:49,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-05 12:29:49,604 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-09-05 12:29:49,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:49,605 INFO L225 Difference]: With dead ends: 44 [2019-09-05 12:29:49,605 INFO L226 Difference]: Without dead ends: 37 [2019-09-05 12:29:49,606 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-05 12:29:49,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-05 12:29:49,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-09-05 12:29:49,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-05 12:29:49,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-09-05 12:29:49,612 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 30 [2019-09-05 12:29:49,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:49,613 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-09-05 12:29:49,613 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 12:29:49,613 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-09-05 12:29:49,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-05 12:29:49,614 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:49,614 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:49,614 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:49,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:49,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1107083552, now seen corresponding path program 3 times [2019-09-05 12:29:49,615 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:49,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:49,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:49,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:29:49,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:49,619 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:49,619 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:49,620 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-05 12:29:49,638 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:29:49,649 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-05 12:29:49,650 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:29:49,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-05 12:29:49,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:49,698 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-09-05 12:29:49,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:49,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-05 12:29:49,767 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-05 12:29:49,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-05 12:29:49,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-09-05 12:29:49,768 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 7 states. [2019-09-05 12:29:49,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:49,895 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2019-09-05 12:29:49,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-05 12:29:49,896 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2019-09-05 12:29:49,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:49,897 INFO L225 Difference]: With dead ends: 43 [2019-09-05 12:29:49,897 INFO L226 Difference]: Without dead ends: 38 [2019-09-05 12:29:49,898 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-09-05 12:29:49,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-05 12:29:49,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-09-05 12:29:49,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-05 12:29:49,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-09-05 12:29:49,906 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 31 [2019-09-05 12:29:49,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:49,907 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-09-05 12:29:49,907 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-05 12:29:49,907 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-09-05 12:29:49,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-05 12:29:49,908 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:49,909 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:49,909 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:49,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:49,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1589169527, now seen corresponding path program 3 times [2019-09-05 12:29:49,910 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:49,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:49,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:49,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:29:49,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:49,915 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:49,915 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:49,915 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:49,934 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:29:49,966 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-05 12:29:49,966 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:29:49,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-05 12:29:49,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:50,079 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-05 12:29:50,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:50,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-09-05 12:29:50,117 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-05 12:29:50,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-05 12:29:50,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-09-05 12:29:50,118 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 12 states. [2019-09-05 12:29:50,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:50,294 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2019-09-05 12:29:50,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-05 12:29:50,295 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2019-09-05 12:29:50,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:50,296 INFO L225 Difference]: With dead ends: 46 [2019-09-05 12:29:50,296 INFO L226 Difference]: Without dead ends: 41 [2019-09-05 12:29:50,297 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-09-05 12:29:50,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-09-05 12:29:50,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-09-05 12:29:50,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-05 12:29:50,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-09-05 12:29:50,308 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 37 [2019-09-05 12:29:50,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:50,310 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-09-05 12:29:50,310 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-05 12:29:50,311 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-09-05 12:29:50,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-05 12:29:50,313 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:50,313 INFO L399 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:50,314 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:50,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:50,314 INFO L82 PathProgramCache]: Analyzing trace with hash 2137184911, now seen corresponding path program 4 times [2019-09-05 12:29:50,314 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:50,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:50,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:50,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:29:50,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:50,319 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:50,319 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:50,320 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 [2019-09-05 12:29:50,336 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:29:50,359 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:29:50,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:29:50,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 52 conjunts are in the unsatisfiable core [2019-09-05 12:29:50,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:50,531 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 12:29:50,569 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:50,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-05 12:29:50,569 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-05 12:29:50,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-05 12:29:50,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2019-09-05 12:29:50,572 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 13 states. [2019-09-05 12:29:50,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:50,779 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2019-09-05 12:29:50,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-05 12:29:50,780 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2019-09-05 12:29:50,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:50,781 INFO L225 Difference]: With dead ends: 53 [2019-09-05 12:29:50,781 INFO L226 Difference]: Without dead ends: 48 [2019-09-05 12:29:50,781 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-09-05 12:29:50,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-05 12:29:50,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-09-05 12:29:50,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-05 12:29:50,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2019-09-05 12:29:50,790 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2019-09-05 12:29:50,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:50,790 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2019-09-05 12:29:50,791 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-05 12:29:50,791 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2019-09-05 12:29:50,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-05 12:29:50,792 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:50,792 INFO L399 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:50,793 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:50,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:50,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1474060919, now seen corresponding path program 5 times [2019-09-05 12:29:50,793 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:50,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:50,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:50,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:29:50,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:50,798 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:50,798 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:50,798 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) [2019-09-05 12:29:50,815 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:50,850 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-05 12:29:50,851 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:29:50,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-05 12:29:50,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:50,967 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:50,993 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 58 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-09-05 12:29:50,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:50,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-05 12:29:50,997 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-05 12:29:50,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-05 12:29:50,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2019-09-05 12:29:50,998 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 13 states. [2019-09-05 12:29:51,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:51,205 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2019-09-05 12:29:51,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-05 12:29:51,206 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2019-09-05 12:29:51,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:51,207 INFO L225 Difference]: With dead ends: 56 [2019-09-05 12:29:51,207 INFO L226 Difference]: Without dead ends: 51 [2019-09-05 12:29:51,208 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-09-05 12:29:51,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-05 12:29:51,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-09-05 12:29:51,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-05 12:29:51,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2019-09-05 12:29:51,217 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 51 [2019-09-05 12:29:51,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:51,217 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2019-09-05 12:29:51,217 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-05 12:29:51,217 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2019-09-05 12:29:51,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-09-05 12:29:51,219 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:51,219 INFO L399 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:51,219 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:51,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:51,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1744984689, now seen corresponding path program 6 times [2019-09-05 12:29:51,220 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:51,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:51,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:51,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:29:51,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:51,225 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:51,225 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:51,225 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 [2019-09-05 12:29:51,278 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:29:51,378 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-05 12:29:51,378 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:29:51,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2019-09-05 12:29:51,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:51,533 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:51,564 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-09-05 12:29:51,568 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:51,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-05 12:29:51,569 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-05 12:29:51,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-05 12:29:51,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-09-05 12:29:51,570 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 15 states. [2019-09-05 12:29:51,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:51,804 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2019-09-05 12:29:51,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-05 12:29:51,804 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2019-09-05 12:29:51,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:51,806 INFO L225 Difference]: With dead ends: 59 [2019-09-05 12:29:51,806 INFO L226 Difference]: Without dead ends: 54 [2019-09-05 12:29:51,806 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-09-05 12:29:51,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-05 12:29:51,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-09-05 12:29:51,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-05 12:29:51,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2019-09-05 12:29:51,815 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 58 [2019-09-05 12:29:51,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:51,816 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2019-09-05 12:29:51,816 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-05 12:29:51,816 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2019-09-05 12:29:51,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-05 12:29:51,817 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:51,817 INFO L399 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:51,817 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:51,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:51,818 INFO L82 PathProgramCache]: Analyzing trace with hash -862505097, now seen corresponding path program 7 times [2019-09-05 12:29:51,818 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:51,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:51,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:51,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:29:51,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:51,824 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:51,825 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:51,825 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:51,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:29:51,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:29:51,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 65 conjunts are in the unsatisfiable core [2019-09-05 12:29:51,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:52,102 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:52,139 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 32 proven. 104 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-09-05 12:29:52,142 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:52,142 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-09-05 12:29:52,142 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-05 12:29:52,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-05 12:29:52,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2019-09-05 12:29:52,143 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 16 states. [2019-09-05 12:29:52,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:52,464 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2019-09-05 12:29:52,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-05 12:29:52,464 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2019-09-05 12:29:52,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:52,466 INFO L225 Difference]: With dead ends: 66 [2019-09-05 12:29:52,466 INFO L226 Difference]: Without dead ends: 61 [2019-09-05 12:29:52,467 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2019-09-05 12:29:52,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-05 12:29:52,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-09-05 12:29:52,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-09-05 12:29:52,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2019-09-05 12:29:52,476 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 65 [2019-09-05 12:29:52,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:52,476 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2019-09-05 12:29:52,477 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-05 12:29:52,477 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2019-09-05 12:29:52,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-05 12:29:52,478 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:52,478 INFO L399 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:52,478 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:52,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:52,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1738985329, now seen corresponding path program 8 times [2019-09-05 12:29:52,479 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:52,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:52,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:52,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:29:52,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:52,483 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:52,483 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:52,483 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:52,495 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:29:52,520 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:29:52,521 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:29:52,522 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 66 conjunts are in the unsatisfiable core [2019-09-05 12:29:52,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:52,750 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 41 proven. 109 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-09-05 12:29:52,795 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:52,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-09-05 12:29:52,795 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-05 12:29:52,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-05 12:29:52,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2019-09-05 12:29:52,796 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 17 states. [2019-09-05 12:29:53,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:53,164 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2019-09-05 12:29:53,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-05 12:29:53,165 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2019-09-05 12:29:53,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:53,167 INFO L225 Difference]: With dead ends: 73 [2019-09-05 12:29:53,167 INFO L226 Difference]: Without dead ends: 68 [2019-09-05 12:29:53,168 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2019-09-05 12:29:53,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-05 12:29:53,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-09-05 12:29:53,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-05 12:29:53,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2019-09-05 12:29:53,180 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 72 [2019-09-05 12:29:53,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:53,181 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2019-09-05 12:29:53,181 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-05 12:29:53,181 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2019-09-05 12:29:53,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-05 12:29:53,183 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:53,183 INFO L399 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:53,183 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:53,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:53,183 INFO L82 PathProgramCache]: Analyzing trace with hash 54086775, now seen corresponding path program 9 times [2019-09-05 12:29:53,184 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:53,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:53,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:53,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:29:53,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:53,189 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:53,189 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:53,189 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 [2019-09-05 12:29:53,202 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:29:53,264 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-05 12:29:53,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:29:53,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 54 conjunts are in the unsatisfiable core [2019-09-05 12:29:53,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:53,538 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 19 proven. 163 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-09-05 12:29:53,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:53,618 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-05 12:29:53,620 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-05 12:29:53,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-05 12:29:53,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-09-05 12:29:53,622 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 18 states. [2019-09-05 12:29:54,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:54,122 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2019-09-05 12:29:54,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-05 12:29:54,122 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2019-09-05 12:29:54,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:54,124 INFO L225 Difference]: With dead ends: 76 [2019-09-05 12:29:54,124 INFO L226 Difference]: Without dead ends: 71 [2019-09-05 12:29:54,125 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2019-09-05 12:29:54,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-09-05 12:29:54,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-09-05 12:29:54,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-09-05 12:29:54,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-09-05 12:29:54,149 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 79 [2019-09-05 12:29:54,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:54,150 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-09-05 12:29:54,150 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-05 12:29:54,150 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-09-05 12:29:54,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-09-05 12:29:54,154 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:54,154 INFO L399 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:54,154 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:54,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:54,155 INFO L82 PathProgramCache]: Analyzing trace with hash -2145027185, now seen corresponding path program 10 times [2019-09-05 12:29:54,155 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:54,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:54,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:54,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:29:54,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:54,167 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:54,167 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:54,167 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:54,196 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:29:54,265 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:29:54,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:29:54,268 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 78 conjunts are in the unsatisfiable core [2019-09-05 12:29:54,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:54,701 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 52 proven. 207 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 12:29:54,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:54,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-09-05 12:29:54,789 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-05 12:29:54,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-05 12:29:54,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2019-09-05 12:29:54,790 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 20 states. [2019-09-05 12:29:55,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:55,198 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2019-09-05 12:29:55,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-05 12:29:55,199 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 86 [2019-09-05 12:29:55,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:55,200 INFO L225 Difference]: With dead ends: 83 [2019-09-05 12:29:55,200 INFO L226 Difference]: Without dead ends: 78 [2019-09-05 12:29:55,201 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2019-09-05 12:29:55,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-05 12:29:55,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-09-05 12:29:55,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-09-05 12:29:55,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2019-09-05 12:29:55,211 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 86 [2019-09-05 12:29:55,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:55,211 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2019-09-05 12:29:55,212 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-05 12:29:55,212 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2019-09-05 12:29:55,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-05 12:29:55,213 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:55,213 INFO L399 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:55,213 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:55,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:55,213 INFO L82 PathProgramCache]: Analyzing trace with hash -166551177, now seen corresponding path program 11 times [2019-09-05 12:29:55,214 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:55,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:55,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:55,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:29:55,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:55,218 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:55,218 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:55,218 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:55,238 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:29:55,312 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-09-05 12:29:55,313 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:29:55,315 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 60 conjunts are in the unsatisfiable core [2019-09-05 12:29:55,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:55,513 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 29 proven. 226 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-09-05 12:29:55,566 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:55,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-05 12:29:55,567 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-05 12:29:55,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-05 12:29:55,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2019-09-05 12:29:55,567 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 19 states. [2019-09-05 12:29:55,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:55,975 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2019-09-05 12:29:55,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-05 12:29:55,976 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 93 [2019-09-05 12:29:55,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:55,977 INFO L225 Difference]: With dead ends: 86 [2019-09-05 12:29:55,977 INFO L226 Difference]: Without dead ends: 81 [2019-09-05 12:29:55,978 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2019-09-05 12:29:55,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-05 12:29:55,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-09-05 12:29:55,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-09-05 12:29:55,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2019-09-05 12:29:55,995 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 93 [2019-09-05 12:29:55,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:55,996 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2019-09-05 12:29:55,996 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-05 12:29:55,996 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2019-09-05 12:29:55,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-05 12:29:55,999 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:55,999 INFO L399 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:55,999 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:56,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:56,000 INFO L82 PathProgramCache]: Analyzing trace with hash 454198927, now seen corresponding path program 12 times [2019-09-05 12:29:56,000 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:56,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:56,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:56,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:29:56,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:56,008 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:56,008 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:56,008 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:56,024 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:29:56,134 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-05 12:29:56,135 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:29:56,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 66 conjunts are in the unsatisfiable core [2019-09-05 12:29:56,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:56,366 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:56,414 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 25 proven. 271 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 12:29:56,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:56,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-09-05 12:29:56,418 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-05 12:29:56,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-05 12:29:56,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2019-09-05 12:29:56,419 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand 21 states. [2019-09-05 12:29:56,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:56,899 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2019-09-05 12:29:56,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-05 12:29:56,899 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 100 [2019-09-05 12:29:56,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:56,901 INFO L225 Difference]: With dead ends: 89 [2019-09-05 12:29:56,901 INFO L226 Difference]: Without dead ends: 84 [2019-09-05 12:29:56,902 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2019-09-05 12:29:56,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-05 12:29:56,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-09-05 12:29:56,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-09-05 12:29:56,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2019-09-05 12:29:56,912 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 100 [2019-09-05 12:29:56,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:56,913 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2019-09-05 12:29:56,913 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-05 12:29:56,913 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2019-09-05 12:29:56,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-05 12:29:56,914 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:56,914 INFO L399 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:56,915 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:56,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:56,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1400059511, now seen corresponding path program 13 times [2019-09-05 12:29:56,915 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:56,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:56,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:56,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:29:56,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:56,919 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:56,920 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:56,920 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:56,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:29:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:29:56,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 101 conjunts are in the unsatisfiable core [2019-09-05 12:29:56,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:57,376 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:57,449 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 62 proven. 311 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2019-09-05 12:29:57,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:57,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-09-05 12:29:57,453 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-05 12:29:57,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-05 12:29:57,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2019-09-05 12:29:57,453 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 22 states. [2019-09-05 12:29:58,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:58,061 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2019-09-05 12:29:58,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-05 12:29:58,062 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2019-09-05 12:29:58,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:58,063 INFO L225 Difference]: With dead ends: 96 [2019-09-05 12:29:58,063 INFO L226 Difference]: Without dead ends: 91 [2019-09-05 12:29:58,064 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2019-09-05 12:29:58,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-09-05 12:29:58,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-09-05 12:29:58,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-09-05 12:29:58,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2019-09-05 12:29:58,073 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 107 [2019-09-05 12:29:58,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:58,074 INFO L475 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2019-09-05 12:29:58,074 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-05 12:29:58,074 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2019-09-05 12:29:58,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-09-05 12:29:58,075 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:58,076 INFO L399 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:58,076 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:58,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:58,076 INFO L82 PathProgramCache]: Analyzing trace with hash 13652367, now seen corresponding path program 14 times [2019-09-05 12:29:58,076 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:58,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:58,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:58,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:29:58,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:58,081 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:58,081 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:58,081 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:58,094 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:29:58,132 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:29:58,132 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:29:58,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 102 conjunts are in the unsatisfiable core [2019-09-05 12:29:58,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:58,522 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 71 proven. 316 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2019-09-05 12:29:58,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:58,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-09-05 12:29:58,607 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-05 12:29:58,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-05 12:29:58,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2019-09-05 12:29:58,608 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand 23 states. [2019-09-05 12:29:59,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:59,301 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2019-09-05 12:29:59,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-05 12:29:59,302 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 114 [2019-09-05 12:29:59,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:59,304 INFO L225 Difference]: With dead ends: 103 [2019-09-05 12:29:59,304 INFO L226 Difference]: Without dead ends: 98 [2019-09-05 12:29:59,305 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2019-09-05 12:29:59,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-09-05 12:29:59,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-09-05 12:29:59,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-09-05 12:29:59,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2019-09-05 12:29:59,316 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 114 [2019-09-05 12:29:59,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:59,317 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2019-09-05 12:29:59,317 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-05 12:29:59,317 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2019-09-05 12:29:59,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-05 12:29:59,318 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:59,318 INFO L399 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:59,319 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:59,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:59,319 INFO L82 PathProgramCache]: Analyzing trace with hash 2108361591, now seen corresponding path program 15 times [2019-09-05 12:29:59,319 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:59,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:59,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:59,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:29:59,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:59,324 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:59,324 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:59,324 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:59,338 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:29:59,474 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-09-05 12:29:59,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:29:59,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 78 conjunts are in the unsatisfiable core [2019-09-05 12:29:59,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:59,732 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:59,780 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 31 proven. 406 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2019-09-05 12:29:59,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:59,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-05 12:29:59,784 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-05 12:29:59,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-05 12:29:59,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2019-09-05 12:29:59,785 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand 24 states. [2019-09-05 12:30:00,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:00,475 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2019-09-05 12:30:00,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-05 12:30:00,476 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 121 [2019-09-05 12:30:00,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:00,478 INFO L225 Difference]: With dead ends: 106 [2019-09-05 12:30:00,478 INFO L226 Difference]: Without dead ends: 101 [2019-09-05 12:30:00,479 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2019-09-05 12:30:00,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-09-05 12:30:00,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2019-09-05 12:30:00,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-09-05 12:30:00,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2019-09-05 12:30:00,490 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 121 [2019-09-05 12:30:00,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:00,491 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2019-09-05 12:30:00,491 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-05 12:30:00,491 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2019-09-05 12:30:00,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-09-05 12:30:00,492 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:00,492 INFO L399 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:00,493 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:00,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:00,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1794188145, now seen corresponding path program 16 times [2019-09-05 12:30:00,493 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:00,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:00,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:00,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:30:00,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:00,498 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:00,498 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:00,498 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:30:00,534 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:30:00,593 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:30:00,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:30:00,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 110 conjunts are in the unsatisfiable core [2019-09-05 12:30:00,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:01,111 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 88 proven. 480 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2019-09-05 12:30:01,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:01,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-09-05 12:30:01,200 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-05 12:30:01,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-05 12:30:01,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=598, Unknown=0, NotChecked=0, Total=650 [2019-09-05 12:30:01,201 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand 26 states. [2019-09-05 12:30:02,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:02,067 INFO L93 Difference]: Finished difference Result 117 states and 123 transitions. [2019-09-05 12:30:02,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-05 12:30:02,067 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 128 [2019-09-05 12:30:02,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:02,069 INFO L225 Difference]: With dead ends: 117 [2019-09-05 12:30:02,069 INFO L226 Difference]: Without dead ends: 112 [2019-09-05 12:30:02,070 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2019-09-05 12:30:02,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-09-05 12:30:02,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2019-09-05 12:30:02,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-09-05 12:30:02,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2019-09-05 12:30:02,086 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 128 [2019-09-05 12:30:02,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:02,087 INFO L475 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2019-09-05 12:30:02,087 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-05 12:30:02,087 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2019-09-05 12:30:02,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-09-05 12:30:02,088 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:02,089 INFO L399 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:02,089 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:02,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:02,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1962270601, now seen corresponding path program 17 times [2019-09-05 12:30:02,090 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:02,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:02,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:02,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:30:02,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:02,095 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:02,096 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:02,096 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:30:02,124 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:30:02,505 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-09-05 12:30:02,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:30:02,507 INFO L256 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 84 conjunts are in the unsatisfiable core [2019-09-05 12:30:02,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:02,782 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:02,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 41 proven. 505 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2019-09-05 12:30:02,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:02,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-09-05 12:30:02,836 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-05 12:30:02,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-05 12:30:02,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2019-09-05 12:30:02,837 INFO L87 Difference]: Start difference. First operand 112 states and 118 transitions. Second operand 25 states. [2019-09-05 12:30:03,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:03,562 INFO L93 Difference]: Finished difference Result 120 states and 127 transitions. [2019-09-05 12:30:03,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-05 12:30:03,565 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 135 [2019-09-05 12:30:03,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:03,567 INFO L225 Difference]: With dead ends: 120 [2019-09-05 12:30:03,567 INFO L226 Difference]: Without dead ends: 115 [2019-09-05 12:30:03,568 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2019-09-05 12:30:03,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-09-05 12:30:03,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2019-09-05 12:30:03,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-09-05 12:30:03,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 122 transitions. [2019-09-05 12:30:03,579 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 122 transitions. Word has length 135 [2019-09-05 12:30:03,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:03,580 INFO L475 AbstractCegarLoop]: Abstraction has 115 states and 122 transitions. [2019-09-05 12:30:03,580 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-05 12:30:03,580 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 122 transitions. [2019-09-05 12:30:03,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-09-05 12:30:03,581 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:03,581 INFO L399 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:03,582 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:03,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:03,582 INFO L82 PathProgramCache]: Analyzing trace with hash 125708175, now seen corresponding path program 18 times [2019-09-05 12:30:03,582 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:03,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:03,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:03,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:30:03,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:03,586 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:03,587 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:03,587 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:30:03,602 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:30:03,776 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-05 12:30:03,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:30:03,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 90 conjunts are in the unsatisfiable core [2019-09-05 12:30:03,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:04,114 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 37 proven. 568 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-09-05 12:30:04,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:04,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-09-05 12:30:04,192 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-05 12:30:04,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-05 12:30:04,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2019-09-05 12:30:04,193 INFO L87 Difference]: Start difference. First operand 115 states and 122 transitions. Second operand 27 states. [2019-09-05 12:30:04,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:04,998 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2019-09-05 12:30:04,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-05 12:30:04,998 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 142 [2019-09-05 12:30:04,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:05,000 INFO L225 Difference]: With dead ends: 123 [2019-09-05 12:30:05,000 INFO L226 Difference]: Without dead ends: 118 [2019-09-05 12:30:05,002 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=802, Unknown=0, NotChecked=0, Total=870 [2019-09-05 12:30:05,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-09-05 12:30:05,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2019-09-05 12:30:05,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-09-05 12:30:05,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 126 transitions. [2019-09-05 12:30:05,017 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 126 transitions. Word has length 142 [2019-09-05 12:30:05,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:05,018 INFO L475 AbstractCegarLoop]: Abstraction has 118 states and 126 transitions. [2019-09-05 12:30:05,018 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-05 12:30:05,018 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 126 transitions. [2019-09-05 12:30:05,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-09-05 12:30:05,019 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:05,020 INFO L399 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:05,020 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:05,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:05,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1172338039, now seen corresponding path program 19 times [2019-09-05 12:30:05,020 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:05,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:05,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:05,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:30:05,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:05,025 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:05,025 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:05,025 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 [2019-09-05 12:30:05,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:30:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:30:05,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 137 conjunts are in the unsatisfiable core [2019-09-05 12:30:05,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:05,627 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 92 proven. 626 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2019-09-05 12:30:05,710 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:05,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-09-05 12:30:05,710 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-05 12:30:05,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-05 12:30:05,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2019-09-05 12:30:05,711 INFO L87 Difference]: Start difference. First operand 118 states and 126 transitions. Second operand 28 states. [2019-09-05 12:30:06,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:06,779 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2019-09-05 12:30:06,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-05 12:30:06,779 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 149 [2019-09-05 12:30:06,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:06,781 INFO L225 Difference]: With dead ends: 130 [2019-09-05 12:30:06,781 INFO L226 Difference]: Without dead ends: 125 [2019-09-05 12:30:06,782 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2019-09-05 12:30:06,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-09-05 12:30:06,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2019-09-05 12:30:06,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-09-05 12:30:06,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 133 transitions. [2019-09-05 12:30:06,794 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 133 transitions. Word has length 149 [2019-09-05 12:30:06,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:06,795 INFO L475 AbstractCegarLoop]: Abstraction has 125 states and 133 transitions. [2019-09-05 12:30:06,795 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-05 12:30:06,795 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 133 transitions. [2019-09-05 12:30:06,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-09-05 12:30:06,796 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:06,796 INFO L399 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:06,797 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:06,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:06,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1406022287, now seen corresponding path program 20 times [2019-09-05 12:30:06,797 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:06,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:06,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:06,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:30:06,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:06,802 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:06,802 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:06,802 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 [2019-09-05 12:30:06,823 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:30:06,875 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:30:06,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:30:06,878 INFO L256 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 138 conjunts are in the unsatisfiable core [2019-09-05 12:30:06,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:07,471 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:07,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 101 proven. 631 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-09-05 12:30:07,566 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:07,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-09-05 12:30:07,567 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-05 12:30:07,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-05 12:30:07,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2019-09-05 12:30:07,567 INFO L87 Difference]: Start difference. First operand 125 states and 133 transitions. Second operand 29 states. [2019-09-05 12:30:08,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:08,714 INFO L93 Difference]: Finished difference Result 137 states and 145 transitions. [2019-09-05 12:30:08,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-05 12:30:08,715 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 156 [2019-09-05 12:30:08,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:08,716 INFO L225 Difference]: With dead ends: 137 [2019-09-05 12:30:08,717 INFO L226 Difference]: Without dead ends: 132 [2019-09-05 12:30:08,718 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=919, Unknown=0, NotChecked=0, Total=992 [2019-09-05 12:30:08,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-09-05 12:30:08,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2019-09-05 12:30:08,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-09-05 12:30:08,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 140 transitions. [2019-09-05 12:30:08,732 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 140 transitions. Word has length 156 [2019-09-05 12:30:08,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:08,732 INFO L475 AbstractCegarLoop]: Abstraction has 132 states and 140 transitions. [2019-09-05 12:30:08,732 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-05 12:30:08,733 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 140 transitions. [2019-09-05 12:30:08,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-09-05 12:30:08,734 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:08,734 INFO L399 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:08,734 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:08,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:08,734 INFO L82 PathProgramCache]: Analyzing trace with hash 746457719, now seen corresponding path program 21 times [2019-09-05 12:30:08,734 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:08,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:08,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:08,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:30:08,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:08,739 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:08,739 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:08,739 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:30:08,750 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:30:09,175 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-09-05 12:30:09,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:30:09,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 102 conjunts are in the unsatisfiable core [2019-09-05 12:30:09,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:09,623 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 43 proven. 757 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2019-09-05 12:30:09,690 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:09,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-09-05 12:30:09,691 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-05 12:30:09,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-05 12:30:09,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2019-09-05 12:30:09,692 INFO L87 Difference]: Start difference. First operand 132 states and 140 transitions. Second operand 30 states. [2019-09-05 12:30:10,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:10,743 INFO L93 Difference]: Finished difference Result 140 states and 149 transitions. [2019-09-05 12:30:10,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-05 12:30:10,743 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 163 [2019-09-05 12:30:10,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:10,744 INFO L225 Difference]: With dead ends: 140 [2019-09-05 12:30:10,745 INFO L226 Difference]: Without dead ends: 135 [2019-09-05 12:30:10,745 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=982, Unknown=0, NotChecked=0, Total=1056 [2019-09-05 12:30:10,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-09-05 12:30:10,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2019-09-05 12:30:10,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-09-05 12:30:10,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 144 transitions. [2019-09-05 12:30:10,759 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 144 transitions. Word has length 163 [2019-09-05 12:30:10,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:10,760 INFO L475 AbstractCegarLoop]: Abstraction has 135 states and 144 transitions. [2019-09-05 12:30:10,760 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-05 12:30:10,760 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 144 transitions. [2019-09-05 12:30:10,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-09-05 12:30:10,764 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:10,764 INFO L399 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:10,764 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:10,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:10,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1101987215, now seen corresponding path program 22 times [2019-09-05 12:30:10,764 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:10,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:10,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:10,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:30:10,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:10,772 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:10,772 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:10,772 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:30:10,788 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:30:10,895 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:30:10,895 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:30:10,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 104 conjunts are in the unsatisfiable core [2019-09-05 12:30:10,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:11,323 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 45 proven. 826 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2019-09-05 12:30:11,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:11,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-09-05 12:30:11,414 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-05 12:30:11,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-05 12:30:11,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2019-09-05 12:30:11,415 INFO L87 Difference]: Start difference. First operand 135 states and 144 transitions. Second operand 30 states. [2019-09-05 12:30:12,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:12,502 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2019-09-05 12:30:12,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-05 12:30:12,503 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 170 [2019-09-05 12:30:12,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:12,505 INFO L225 Difference]: With dead ends: 143 [2019-09-05 12:30:12,505 INFO L226 Difference]: Without dead ends: 138 [2019-09-05 12:30:12,506 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=983, Unknown=0, NotChecked=0, Total=1056 [2019-09-05 12:30:12,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-09-05 12:30:12,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2019-09-05 12:30:12,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-09-05 12:30:12,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2019-09-05 12:30:12,520 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 170 [2019-09-05 12:30:12,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:12,520 INFO L475 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2019-09-05 12:30:12,520 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-05 12:30:12,521 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2019-09-05 12:30:12,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-09-05 12:30:12,522 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:12,522 INFO L399 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:12,522 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:12,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:12,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1899159415, now seen corresponding path program 23 times [2019-09-05 12:30:12,522 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:12,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:12,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:12,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:30:12,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:12,527 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:12,527 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:12,527 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:30:12,543 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:30:13,036 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-09-05 12:30:13,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:30:13,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 108 conjunts are in the unsatisfiable core [2019-09-05 12:30:13,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:13,446 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:13,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 56 proven. 889 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2019-09-05 12:30:13,520 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:13,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-09-05 12:30:13,521 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-05 12:30:13,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-05 12:30:13,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2019-09-05 12:30:13,522 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand 31 states. [2019-09-05 12:30:14,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:14,599 INFO L93 Difference]: Finished difference Result 146 states and 157 transitions. [2019-09-05 12:30:14,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-05 12:30:14,599 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 177 [2019-09-05 12:30:14,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:14,601 INFO L225 Difference]: With dead ends: 146 [2019-09-05 12:30:14,602 INFO L226 Difference]: Without dead ends: 141 [2019-09-05 12:30:14,603 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=1047, Unknown=0, NotChecked=0, Total=1122 [2019-09-05 12:30:14,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-09-05 12:30:14,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2019-09-05 12:30:14,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-09-05 12:30:14,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 152 transitions. [2019-09-05 12:30:14,617 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 152 transitions. Word has length 177 [2019-09-05 12:30:14,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:14,617 INFO L475 AbstractCegarLoop]: Abstraction has 141 states and 152 transitions. [2019-09-05 12:30:14,617 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-05 12:30:14,617 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 152 transitions. [2019-09-05 12:30:14,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-09-05 12:30:14,618 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:14,619 INFO L399 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:14,619 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:14,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:14,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1691388047, now seen corresponding path program 24 times [2019-09-05 12:30:14,619 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:14,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:14,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:14,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:30:14,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:14,625 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:14,625 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:14,625 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-05 12:30:14,640 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:30:14,965 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-09-05 12:30:14,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:30:14,967 INFO L256 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 114 conjunts are in the unsatisfiable core [2019-09-05 12:30:14,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:15,758 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:15,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 49 proven. 973 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2019-09-05 12:30:15,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:15,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-09-05 12:30:15,913 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-05 12:30:15,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-05 12:30:15,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2019-09-05 12:30:15,914 INFO L87 Difference]: Start difference. First operand 141 states and 152 transitions. Second operand 33 states. [2019-09-05 12:30:17,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:17,139 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2019-09-05 12:30:17,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-05 12:30:17,140 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 184 [2019-09-05 12:30:17,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:17,141 INFO L225 Difference]: With dead ends: 149 [2019-09-05 12:30:17,142 INFO L226 Difference]: Without dead ends: 144 [2019-09-05 12:30:17,143 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=80, Invalid=1180, Unknown=0, NotChecked=0, Total=1260 [2019-09-05 12:30:17,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-09-05 12:30:17,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2019-09-05 12:30:17,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-09-05 12:30:17,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 156 transitions. [2019-09-05 12:30:17,158 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 156 transitions. Word has length 184 [2019-09-05 12:30:17,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:17,159 INFO L475 AbstractCegarLoop]: Abstraction has 144 states and 156 transitions. [2019-09-05 12:30:17,159 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-05 12:30:17,159 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 156 transitions. [2019-09-05 12:30:17,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-09-05 12:30:17,160 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:17,160 INFO L399 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:17,160 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:17,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:17,161 INFO L82 PathProgramCache]: Analyzing trace with hash -95488905, now seen corresponding path program 25 times [2019-09-05 12:30:17,161 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:17,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:17,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:17,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:30:17,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:17,166 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:17,166 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:17,166 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 [2019-09-05 12:30:17,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:30:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:30:17,253 INFO L256 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 173 conjunts are in the unsatisfiable core [2019-09-05 12:30:17,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:18,154 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 122 proven. 1049 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2019-09-05 12:30:18,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:18,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-09-05 12:30:18,295 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-05 12:30:18,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-05 12:30:18,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2019-09-05 12:30:18,296 INFO L87 Difference]: Start difference. First operand 144 states and 156 transitions. Second operand 34 states. [2019-09-05 12:30:19,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:19,967 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2019-09-05 12:30:19,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-05 12:30:19,968 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 191 [2019-09-05 12:30:19,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:19,970 INFO L225 Difference]: With dead ends: 156 [2019-09-05 12:30:19,970 INFO L226 Difference]: Without dead ends: 151 [2019-09-05 12:30:19,971 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2019-09-05 12:30:19,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-09-05 12:30:19,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2019-09-05 12:30:19,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-09-05 12:30:19,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 163 transitions. [2019-09-05 12:30:19,986 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 163 transitions. Word has length 191 [2019-09-05 12:30:19,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:19,986 INFO L475 AbstractCegarLoop]: Abstraction has 151 states and 163 transitions. [2019-09-05 12:30:19,987 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-05 12:30:19,987 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 163 transitions. [2019-09-05 12:30:19,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-09-05 12:30:19,988 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:19,988 INFO L399 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:19,988 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:19,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:19,989 INFO L82 PathProgramCache]: Analyzing trace with hash 484627343, now seen corresponding path program 26 times [2019-09-05 12:30:19,989 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:19,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:19,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:19,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:30:19,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:19,994 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:19,994 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:19,994 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 [2019-09-05 12:30:20,008 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:30:20,080 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:30:20,081 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:30:20,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 174 conjunts are in the unsatisfiable core [2019-09-05 12:30:20,093 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:20,947 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 131 proven. 1054 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2019-09-05 12:30:21,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:21,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-09-05 12:30:21,075 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-05 12:30:21,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-05 12:30:21,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2019-09-05 12:30:21,075 INFO L87 Difference]: Start difference. First operand 151 states and 163 transitions. Second operand 35 states. [2019-09-05 12:30:23,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:23,018 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2019-09-05 12:30:23,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-05 12:30:23,018 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 198 [2019-09-05 12:30:23,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:23,020 INFO L225 Difference]: With dead ends: 163 [2019-09-05 12:30:23,020 INFO L226 Difference]: Without dead ends: 158 [2019-09-05 12:30:23,021 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=1321, Unknown=0, NotChecked=0, Total=1406 [2019-09-05 12:30:23,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-09-05 12:30:23,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2019-09-05 12:30:23,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-09-05 12:30:23,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 170 transitions. [2019-09-05 12:30:23,036 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 170 transitions. Word has length 198 [2019-09-05 12:30:23,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:23,037 INFO L475 AbstractCegarLoop]: Abstraction has 158 states and 170 transitions. [2019-09-05 12:30:23,037 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-05 12:30:23,037 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 170 transitions. [2019-09-05 12:30:23,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-09-05 12:30:23,038 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:23,039 INFO L399 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:23,039 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:23,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:23,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1646414199, now seen corresponding path program 27 times [2019-09-05 12:30:23,039 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:23,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:23,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:23,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:30:23,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:23,044 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:23,045 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:23,045 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:30:23,072 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:30:24,274 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2019-09-05 12:30:24,274 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:30:24,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 126 conjunts are in the unsatisfiable core [2019-09-05 12:30:24,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:24,816 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2702 backedges. 55 proven. 1216 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Exception during sending of exit command (exit): Stream closed [2019-09-05 12:30:25,097 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:25,097 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-09-05 12:30:25,097 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-05 12:30:25,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-05 12:30:25,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2019-09-05 12:30:25,099 INFO L87 Difference]: Start difference. First operand 158 states and 170 transitions. Second operand 36 states. [2019-09-05 12:30:26,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:26,607 INFO L93 Difference]: Finished difference Result 166 states and 179 transitions. [2019-09-05 12:30:26,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-05 12:30:26,607 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 205 [2019-09-05 12:30:26,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:26,609 INFO L225 Difference]: With dead ends: 166 [2019-09-05 12:30:26,609 INFO L226 Difference]: Without dead ends: 161 [2019-09-05 12:30:26,611 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=1396, Unknown=0, NotChecked=0, Total=1482 [2019-09-05 12:30:26,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-09-05 12:30:26,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2019-09-05 12:30:26,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-09-05 12:30:26,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 174 transitions. [2019-09-05 12:30:26,627 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 174 transitions. Word has length 205 [2019-09-05 12:30:26,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:26,627 INFO L475 AbstractCegarLoop]: Abstraction has 161 states and 174 transitions. [2019-09-05 12:30:26,627 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-05 12:30:26,628 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 174 transitions. [2019-09-05 12:30:26,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2019-09-05 12:30:26,629 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:26,629 INFO L399 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:26,629 INFO L418 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:26,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:26,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1785340273, now seen corresponding path program 28 times [2019-09-05 12:30:26,630 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:26,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:26,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:26,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:30:26,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:26,635 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:26,635 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:26,635 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:30:26,650 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:30:39,851 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:30:39,851 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:30:39,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 128 conjunts are in the unsatisfiable core [2019-09-05 12:30:39,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:40,450 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 57 proven. 1303 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2019-09-05 12:30:40,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:40,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-09-05 12:30:40,547 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-05 12:30:40,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-05 12:30:40,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2019-09-05 12:30:40,548 INFO L87 Difference]: Start difference. First operand 161 states and 174 transitions. Second operand 36 states. [2019-09-05 12:30:42,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:42,110 INFO L93 Difference]: Finished difference Result 169 states and 183 transitions. [2019-09-05 12:30:42,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-05 12:30:42,111 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 212 [2019-09-05 12:30:42,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:42,113 INFO L225 Difference]: With dead ends: 169 [2019-09-05 12:30:42,113 INFO L226 Difference]: Without dead ends: 164 [2019-09-05 12:30:42,114 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=1397, Unknown=0, NotChecked=0, Total=1482 [2019-09-05 12:30:42,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-09-05 12:30:42,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2019-09-05 12:30:42,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-09-05 12:30:42,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 178 transitions. [2019-09-05 12:30:42,130 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 178 transitions. Word has length 212 [2019-09-05 12:30:42,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:42,131 INFO L475 AbstractCegarLoop]: Abstraction has 164 states and 178 transitions. [2019-09-05 12:30:42,131 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-05 12:30:42,131 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 178 transitions. [2019-09-05 12:30:42,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-09-05 12:30:42,132 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:42,133 INFO L399 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:42,133 INFO L418 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:42,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:42,133 INFO L82 PathProgramCache]: Analyzing trace with hash -151200137, now seen corresponding path program 29 times [2019-09-05 12:30:42,133 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:42,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:42,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:42,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:30:42,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:42,138 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:42,139 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:42,139 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 [2019-09-05 12:30:42,171 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:30:48,396 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-09-05 12:30:48,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:30:48,399 INFO L256 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 132 conjunts are in the unsatisfiable core [2019-09-05 12:30:48,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:49,041 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:49,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 71 proven. 1381 refuted. 0 times theorem prover too weak. 1653 trivial. 0 not checked. [2019-09-05 12:30:49,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:49,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2019-09-05 12:30:49,133 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-05 12:30:49,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-05 12:30:49,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2019-09-05 12:30:49,134 INFO L87 Difference]: Start difference. First operand 164 states and 178 transitions. Second operand 37 states. [2019-09-05 12:30:50,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:50,686 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2019-09-05 12:30:50,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-05 12:30:50,686 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 219 [2019-09-05 12:30:50,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:50,689 INFO L225 Difference]: With dead ends: 172 [2019-09-05 12:30:50,689 INFO L226 Difference]: Without dead ends: 167 [2019-09-05 12:30:50,690 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=1473, Unknown=0, NotChecked=0, Total=1560 [2019-09-05 12:30:50,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-09-05 12:30:50,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2019-09-05 12:30:50,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-09-05 12:30:50,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 182 transitions. [2019-09-05 12:30:50,704 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 182 transitions. Word has length 219 [2019-09-05 12:30:50,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:50,705 INFO L475 AbstractCegarLoop]: Abstraction has 167 states and 182 transitions. [2019-09-05 12:30:50,705 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-05 12:30:50,705 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 182 transitions. [2019-09-05 12:30:50,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-09-05 12:30:50,706 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:50,707 INFO L399 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:50,707 INFO L418 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:50,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:50,707 INFO L82 PathProgramCache]: Analyzing trace with hash -963008113, now seen corresponding path program 30 times [2019-09-05 12:30:50,707 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:50,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:50,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:50,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:30:50,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:50,712 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:50,712 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:50,712 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:30:50,733 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:30:51,468 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-09-05 12:30:51,468 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:30:51,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 138 conjunts are in the unsatisfiable core [2019-09-05 12:30:51,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:52,090 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:52,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3317 backedges. 61 proven. 1486 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2019-09-05 12:30:52,188 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:52,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2019-09-05 12:30:52,188 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-05 12:30:52,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-05 12:30:52,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2019-09-05 12:30:52,189 INFO L87 Difference]: Start difference. First operand 167 states and 182 transitions. Second operand 39 states. [2019-09-05 12:30:53,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:53,994 INFO L93 Difference]: Finished difference Result 175 states and 191 transitions. [2019-09-05 12:30:53,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-05 12:30:53,994 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 226 [2019-09-05 12:30:53,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:53,996 INFO L225 Difference]: With dead ends: 175 [2019-09-05 12:30:53,996 INFO L226 Difference]: Without dead ends: 170 [2019-09-05 12:30:53,997 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=92, Invalid=1630, Unknown=0, NotChecked=0, Total=1722 [2019-09-05 12:30:53,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-09-05 12:30:54,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2019-09-05 12:30:54,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-09-05 12:30:54,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 186 transitions. [2019-09-05 12:30:54,013 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 186 transitions. Word has length 226 [2019-09-05 12:30:54,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:54,014 INFO L475 AbstractCegarLoop]: Abstraction has 170 states and 186 transitions. [2019-09-05 12:30:54,014 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-05 12:30:54,014 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 186 transitions. [2019-09-05 12:30:54,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2019-09-05 12:30:54,015 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:54,015 INFO L399 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:54,016 INFO L418 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:54,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:54,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1154567305, now seen corresponding path program 31 times [2019-09-05 12:30:54,016 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:54,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:54,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:54,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:30:54,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:54,021 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:54,022 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:54,022 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:30:54,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:30:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:30:54,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 209 conjunts are in the unsatisfiable core [2019-09-05 12:30:54,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:55,300 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 152 proven. 1580 refuted. 0 times theorem prover too weak. 1804 trivial. 0 not checked. [2019-09-05 12:30:55,476 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:55,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-09-05 12:30:55,477 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-09-05 12:30:55,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-09-05 12:30:55,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2019-09-05 12:30:55,478 INFO L87 Difference]: Start difference. First operand 170 states and 186 transitions. Second operand 40 states. [2019-09-05 12:30:58,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:58,359 INFO L93 Difference]: Finished difference Result 182 states and 198 transitions. [2019-09-05 12:30:58,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-09-05 12:30:58,360 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 233 [2019-09-05 12:30:58,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:58,362 INFO L225 Difference]: With dead ends: 182 [2019-09-05 12:30:58,362 INFO L226 Difference]: Without dead ends: 177 [2019-09-05 12:30:58,363 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=95, Invalid=1711, Unknown=0, NotChecked=0, Total=1806 [2019-09-05 12:30:58,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-09-05 12:30:58,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2019-09-05 12:30:58,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-09-05 12:30:58,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 193 transitions. [2019-09-05 12:30:58,380 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 193 transitions. Word has length 233 [2019-09-05 12:30:58,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:58,381 INFO L475 AbstractCegarLoop]: Abstraction has 177 states and 193 transitions. [2019-09-05 12:30:58,381 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-09-05 12:30:58,381 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 193 transitions. [2019-09-05 12:30:58,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-09-05 12:30:58,382 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:58,382 INFO L399 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:58,383 INFO L418 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:58,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:58,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1939747983, now seen corresponding path program 32 times [2019-09-05 12:30:58,383 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:58,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:58,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:58,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:30:58,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:58,388 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:58,388 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:58,388 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 [2019-09-05 12:30:58,398 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:30:58,490 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:30:58,490 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:30:58,495 INFO L256 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 144 conjunts are in the unsatisfiable core [2019-09-05 12:30:58,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:59,283 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3762 backedges. 161 proven. 1585 refuted. 0 times theorem prover too weak. 2016 trivial. 0 not checked. [2019-09-05 12:30:59,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:59,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-09-05 12:30:59,383 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-09-05 12:30:59,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-09-05 12:30:59,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2019-09-05 12:30:59,384 INFO L87 Difference]: Start difference. First operand 177 states and 193 transitions. Second operand 40 states. [2019-09-05 12:31:01,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:31:01,317 INFO L93 Difference]: Finished difference Result 185 states and 202 transitions. [2019-09-05 12:31:01,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-09-05 12:31:01,318 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 240 [2019-09-05 12:31:01,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:31:01,320 INFO L225 Difference]: With dead ends: 185 [2019-09-05 12:31:01,320 INFO L226 Difference]: Without dead ends: 180 [2019-09-05 12:31:01,322 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=1713, Unknown=0, NotChecked=0, Total=1806 [2019-09-05 12:31:01,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-09-05 12:31:01,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2019-09-05 12:31:01,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-09-05 12:31:01,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 197 transitions. [2019-09-05 12:31:01,335 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 197 transitions. Word has length 240 [2019-09-05 12:31:01,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:31:01,336 INFO L475 AbstractCegarLoop]: Abstraction has 180 states and 197 transitions. [2019-09-05 12:31:01,336 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-09-05 12:31:01,336 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 197 transitions. [2019-09-05 12:31:01,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2019-09-05 12:31:01,337 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:31:01,338 INFO L399 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:31:01,338 INFO L418 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:31:01,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:31:01,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1695008887, now seen corresponding path program 33 times [2019-09-05 12:31:01,338 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:31:01,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:31:01,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:31:01,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:31:01,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:31:01,343 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:31:01,343 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:31:01,343 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) [2019-09-05 12:31:01,365 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:31:27,182 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2019-09-05 12:31:27,182 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:31:27,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 150 conjunts are in the unsatisfiable core [2019-09-05 12:31:27,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:31:27,919 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:31:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 67 proven. 1783 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2019-09-05 12:31:28,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:31:28,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2019-09-05 12:31:28,029 INFO L454 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-09-05 12:31:28,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-09-05 12:31:28,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2019-09-05 12:31:28,030 INFO L87 Difference]: Start difference. First operand 180 states and 197 transitions. Second operand 42 states. [2019-09-05 12:31:30,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:31:30,122 INFO L93 Difference]: Finished difference Result 188 states and 206 transitions. [2019-09-05 12:31:30,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-09-05 12:31:30,123 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 247 [2019-09-05 12:31:30,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:31:30,124 INFO L225 Difference]: With dead ends: 188 [2019-09-05 12:31:30,125 INFO L226 Difference]: Without dead ends: 183 [2019-09-05 12:31:30,126 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=98, Invalid=1882, Unknown=0, NotChecked=0, Total=1980 [2019-09-05 12:31:30,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-09-05 12:31:30,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2019-09-05 12:31:30,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2019-09-05 12:31:30,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 201 transitions. [2019-09-05 12:31:30,140 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 201 transitions. Word has length 247 [2019-09-05 12:31:30,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:31:30,141 INFO L475 AbstractCegarLoop]: Abstraction has 183 states and 201 transitions. [2019-09-05 12:31:30,141 INFO L476 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-09-05 12:31:30,141 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 201 transitions. [2019-09-05 12:31:30,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2019-09-05 12:31:30,142 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:31:30,143 INFO L399 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:31:30,143 INFO L418 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:31:30,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:31:30,143 INFO L82 PathProgramCache]: Analyzing trace with hash 743669647, now seen corresponding path program 34 times [2019-09-05 12:31:30,143 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:31:30,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:31:30,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:31:30,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:31:30,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:31:30,148 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:31:30,148 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:31:30,148 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 [2019-09-05 12:31:30,167 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST