java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:15:51,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:15:51,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:15:51,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:15:51,571 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:15:51,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:15:51,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:15:51,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:15:51,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:15:51,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:15:51,588 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:15:51,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:15:51,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:15:51,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:15:51,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:15:51,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:15:51,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:15:51,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:15:51,604 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:15:51,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:15:51,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:15:51,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:15:51,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:15:51,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:15:51,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:15:51,628 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:15:51,629 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:15:51,630 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:15:51,631 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:15:51,635 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:15:51,636 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:15:51,637 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:15:51,637 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:15:51,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:15:51,638 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:15:51,639 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:15:51,640 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 [2019-10-14 23:15:51,654 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:15:51,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:15:51,659 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:15:51,659 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:15:51,659 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:15:51,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:15:51,660 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:15:51,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:15:51,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:15:51,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:15:51,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:15:51,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:15:51,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:15:51,663 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:15:51,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:15:51,663 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:15:51,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:15:51,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:15:51,664 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:15:51,664 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:15:51,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:15:51,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:15:51,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:15:51,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:15:51,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:15:51,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:15:51,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:15:51,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:15:51,666 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:15:52,010 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:15:52,032 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:15:52,036 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:15:52,037 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:15:52,037 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:15:52,038 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2019-10-14 23:15:52,115 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d025a8a5c/48622667dd0642dca22bcbc91a450028/FLAG53fd90cf4 [2019-10-14 23:15:52,607 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:15:52,607 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2019-10-14 23:15:52,616 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d025a8a5c/48622667dd0642dca22bcbc91a450028/FLAG53fd90cf4 [2019-10-14 23:15:52,935 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d025a8a5c/48622667dd0642dca22bcbc91a450028 [2019-10-14 23:15:52,944 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:15:52,946 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:15:52,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:15:52,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:15:52,950 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:15:52,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:15:52" (1/1) ... [2019-10-14 23:15:52,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5420840d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:52, skipping insertion in model container [2019-10-14 23:15:52,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:15:52" (1/1) ... [2019-10-14 23:15:52,962 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:15:52,979 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:15:53,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:15:53,126 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:15:53,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:15:53,154 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:15:53,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:53 WrapperNode [2019-10-14 23:15:53,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:15:53,155 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:15:53,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:15:53,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:15:53,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:53" (1/1) ... [2019-10-14 23:15:53,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:53" (1/1) ... [2019-10-14 23:15:53,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:53" (1/1) ... [2019-10-14 23:15:53,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:53" (1/1) ... [2019-10-14 23:15:53,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:53" (1/1) ... [2019-10-14 23:15:53,260 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:53" (1/1) ... [2019-10-14 23:15:53,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:53" (1/1) ... [2019-10-14 23:15:53,262 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:15:53,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:15:53,263 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:15:53,263 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:15:53,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:53" (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 [2019-10-14 23:15:53,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:15:53,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:15:53,314 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:15:53,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:15:53,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:15:53,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:15:53,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:15:53,314 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:15:53,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:15:53,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:15:53,484 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:15:53,484 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-14 23:15:53,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:15:53 BoogieIcfgContainer [2019-10-14 23:15:53,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:15:53,489 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:15:53,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:15:53,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:15:53,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:15:52" (1/3) ... [2019-10-14 23:15:53,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1790e222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:15:53, skipping insertion in model container [2019-10-14 23:15:53,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:53" (2/3) ... [2019-10-14 23:15:53,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1790e222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:15:53, skipping insertion in model container [2019-10-14 23:15:53,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:15:53" (3/3) ... [2019-10-14 23:15:53,496 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.v+cfa-reducer.c [2019-10-14 23:15:53,503 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:15:53,510 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:15:53,518 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:15:53,543 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:15:53,543 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:15:53,543 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:15:53,543 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:15:53,544 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:15:53,544 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:15:53,544 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:15:53,544 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:15:53,562 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-10-14 23:15:53,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-14 23:15:53,568 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:53,569 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:53,571 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:53,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:53,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1277702393, now seen corresponding path program 1 times [2019-10-14 23:15:53,586 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:53,586 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080631768] [2019-10-14 23:15:53,587 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:53,587 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:53,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:53,662 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:53,663 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23108284] [2019-10-14 23:15:53,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:53,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:53,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:15:53,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:53,787 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080631768] [2019-10-14 23:15:53,788 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:53,788 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23108284] [2019-10-14 23:15:53,788 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:15:53,789 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:15:53,790 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295638047] [2019-10-14 23:15:53,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:15:53,795 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:53,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:15:53,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:15:53,817 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2019-10-14 23:15:53,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:53,958 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-10-14 23:15:53,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:15:53,961 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-14 23:15:53,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:53,974 INFO L225 Difference]: With dead ends: 26 [2019-10-14 23:15:53,975 INFO L226 Difference]: Without dead ends: 13 [2019-10-14 23:15:53,982 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:15:54,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-14 23:15:54,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-14 23:15:54,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-14 23:15:54,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-10-14 23:15:54,031 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-10-14 23:15:54,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:54,032 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-10-14 23:15:54,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:15:54,033 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-10-14 23:15:54,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-14 23:15:54,034 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:54,035 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:54,238 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:54,239 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:54,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:54,239 INFO L82 PathProgramCache]: Analyzing trace with hash -954130992, now seen corresponding path program 1 times [2019-10-14 23:15:54,240 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:54,241 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637895170] [2019-10-14 23:15:54,241 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:54,242 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:54,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:54,257 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:54,257 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168647387] [2019-10-14 23:15:54,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:54,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:15:54,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:54,361 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:54,377 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637895170] [2019-10-14 23:15:54,378 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:54,378 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168647387] [2019-10-14 23:15:54,378 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:54,379 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 23:15:54,379 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836574502] [2019-10-14 23:15:54,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:15:54,381 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:54,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:15:54,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:15:54,382 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2019-10-14 23:15:54,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:54,447 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2019-10-14 23:15:54,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:15:54,448 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-10-14 23:15:54,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:54,449 INFO L225 Difference]: With dead ends: 17 [2019-10-14 23:15:54,449 INFO L226 Difference]: Without dead ends: 14 [2019-10-14 23:15:54,450 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:15:54,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-14 23:15:54,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-14 23:15:54,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-14 23:15:54,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-10-14 23:15:54,455 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-10-14 23:15:54,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:54,456 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-10-14 23:15:54,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:15:54,456 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-10-14 23:15:54,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-14 23:15:54,456 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:54,457 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:54,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:54,669 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:54,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:54,669 INFO L82 PathProgramCache]: Analyzing trace with hash 486647847, now seen corresponding path program 2 times [2019-10-14 23:15:54,670 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:54,670 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895682729] [2019-10-14 23:15:54,670 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:54,670 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:54,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:54,693 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:54,694 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [51053417] [2019-10-14 23:15:54,694 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:54,760 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:15:54,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:54,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 23:15:54,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:54,809 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:54,830 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895682729] [2019-10-14 23:15:54,830 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:54,831 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51053417] [2019-10-14 23:15:54,831 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:54,832 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 23:15:54,832 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305375569] [2019-10-14 23:15:54,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:15:54,833 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:54,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:15:54,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:15:54,833 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2019-10-14 23:15:54,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:54,902 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-10-14 23:15:54,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:15:54,903 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-10-14 23:15:54,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:54,904 INFO L225 Difference]: With dead ends: 18 [2019-10-14 23:15:54,904 INFO L226 Difference]: Without dead ends: 15 [2019-10-14 23:15:54,905 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:15:54,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-14 23:15:54,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-14 23:15:54,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-14 23:15:54,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-14 23:15:54,911 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-10-14 23:15:54,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:54,912 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-14 23:15:54,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:15:54,912 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-14 23:15:54,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 23:15:54,913 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:54,913 INFO L380 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:55,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:55,117 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:55,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:55,118 INFO L82 PathProgramCache]: Analyzing trace with hash -2093848400, now seen corresponding path program 3 times [2019-10-14 23:15:55,118 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:55,119 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844301890] [2019-10-14 23:15:55,119 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:55,119 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:55,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:55,130 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:55,131 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954224088] [2019-10-14 23:15:55,131 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:55,171 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 23:15:55,172 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:55,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:15:55,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:55,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:55,260 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844301890] [2019-10-14 23:15:55,262 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:55,263 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954224088] [2019-10-14 23:15:55,263 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:55,263 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:15:55,265 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467474947] [2019-10-14 23:15:55,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:15:55,266 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:55,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:15:55,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:15:55,267 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2019-10-14 23:15:55,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:55,343 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-10-14 23:15:55,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:15:55,343 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-10-14 23:15:55,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:55,344 INFO L225 Difference]: With dead ends: 19 [2019-10-14 23:15:55,344 INFO L226 Difference]: Without dead ends: 16 [2019-10-14 23:15:55,344 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:15:55,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-14 23:15:55,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-14 23:15:55,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-14 23:15:55,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-10-14 23:15:55,349 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-10-14 23:15:55,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:55,350 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-10-14 23:15:55,350 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:15:55,350 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-10-14 23:15:55,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 23:15:55,350 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:55,351 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:55,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:55,559 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:55,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:55,560 INFO L82 PathProgramCache]: Analyzing trace with hash -484853433, now seen corresponding path program 4 times [2019-10-14 23:15:55,560 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:55,560 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846905338] [2019-10-14 23:15:55,560 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:55,560 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:55,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:55,571 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:55,572 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978017969] [2019-10-14 23:15:55,572 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-10-14 23:15:55,662 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:15:55,662 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:55,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 23:15:55,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:55,731 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:55,745 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:55,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846905338] [2019-10-14 23:15:55,746 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:55,746 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978017969] [2019-10-14 23:15:55,746 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:55,746 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 23:15:55,747 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78630556] [2019-10-14 23:15:55,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:15:55,747 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:55,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:15:55,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:15:55,748 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2019-10-14 23:15:55,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:55,828 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-10-14 23:15:55,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:15:55,828 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-10-14 23:15:55,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:55,829 INFO L225 Difference]: With dead ends: 20 [2019-10-14 23:15:55,829 INFO L226 Difference]: Without dead ends: 17 [2019-10-14 23:15:55,830 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:15:55,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-14 23:15:55,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-14 23:15:55,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-14 23:15:55,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-10-14 23:15:55,839 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-10-14 23:15:55,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:55,840 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-10-14 23:15:55,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:15:55,842 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-10-14 23:15:55,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 23:15:55,843 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:55,843 INFO L380 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:56,053 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:56,054 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:56,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:56,055 INFO L82 PathProgramCache]: Analyzing trace with hash -2145617008, now seen corresponding path program 5 times [2019-10-14 23:15:56,055 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:56,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311574396] [2019-10-14 23:15:56,056 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:56,056 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:56,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:56,074 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:56,074 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351082493] [2019-10-14 23:15:56,074 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-10-14 23:15:56,112 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-14 23:15:56,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:56,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-14 23:15:56,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:56,183 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:56,201 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311574396] [2019-10-14 23:15:56,201 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:56,202 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351082493] [2019-10-14 23:15:56,202 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:56,202 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:15:56,202 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302372858] [2019-10-14 23:15:56,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:15:56,203 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:56,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:15:56,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:15:56,204 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2019-10-14 23:15:56,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:56,289 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-10-14 23:15:56,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:15:56,291 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-10-14 23:15:56,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:56,292 INFO L225 Difference]: With dead ends: 21 [2019-10-14 23:15:56,292 INFO L226 Difference]: Without dead ends: 18 [2019-10-14 23:15:56,293 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:15:56,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-14 23:15:56,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-14 23:15:56,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-14 23:15:56,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-10-14 23:15:56,301 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2019-10-14 23:15:56,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:56,302 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-10-14 23:15:56,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:15:56,302 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-10-14 23:15:56,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 23:15:56,303 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:56,303 INFO L380 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:56,506 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:56,507 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:56,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:56,507 INFO L82 PathProgramCache]: Analyzing trace with hash -2089680281, now seen corresponding path program 6 times [2019-10-14 23:15:56,508 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:56,508 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167687915] [2019-10-14 23:15:56,508 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:56,509 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:56,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:56,520 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:56,520 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397036503] [2019-10-14 23:15:56,520 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-10-14 23:15:56,555 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-14 23:15:56,556 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:56,561 WARN L254 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-14 23:15:56,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:56,649 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:56,675 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167687915] [2019-10-14 23:15:56,675 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:56,675 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397036503] [2019-10-14 23:15:56,675 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:56,676 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:15:56,676 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404595682] [2019-10-14 23:15:56,676 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:15:56,677 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:56,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:15:56,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:15:56,677 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2019-10-14 23:15:56,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:56,764 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-10-14 23:15:56,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:15:56,764 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-10-14 23:15:56,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:56,765 INFO L225 Difference]: With dead ends: 22 [2019-10-14 23:15:56,765 INFO L226 Difference]: Without dead ends: 19 [2019-10-14 23:15:56,766 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:15:56,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-14 23:15:56,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-14 23:15:56,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-14 23:15:56,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-10-14 23:15:56,770 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2019-10-14 23:15:56,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:56,771 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-10-14 23:15:56,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:15:56,771 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-10-14 23:15:56,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:15:56,772 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:56,772 INFO L380 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:56,981 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:56,982 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:56,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:56,982 INFO L82 PathProgramCache]: Analyzing trace with hash -355641744, now seen corresponding path program 7 times [2019-10-14 23:15:56,983 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:56,983 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477358802] [2019-10-14 23:15:56,984 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:56,984 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:56,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:56,995 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:56,996 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964492004] [2019-10-14 23:15:56,996 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-10-14 23:15:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:57,027 WARN L254 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 39 conjunts are in the unsatisfiable core [2019-10-14 23:15:57,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:57,136 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:57,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477358802] [2019-10-14 23:15:57,152 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:57,152 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964492004] [2019-10-14 23:15:57,152 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:57,152 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-14 23:15:57,153 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777189314] [2019-10-14 23:15:57,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:15:57,153 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:57,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:15:57,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:15:57,154 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2019-10-14 23:15:57,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:57,256 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-10-14 23:15:57,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:15:57,257 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2019-10-14 23:15:57,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:57,266 INFO L225 Difference]: With dead ends: 23 [2019-10-14 23:15:57,266 INFO L226 Difference]: Without dead ends: 20 [2019-10-14 23:15:57,267 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:15:57,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-14 23:15:57,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-14 23:15:57,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-14 23:15:57,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-10-14 23:15:57,278 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2019-10-14 23:15:57,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:57,278 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-10-14 23:15:57,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:15:57,278 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-10-14 23:15:57,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 23:15:57,279 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:57,279 INFO L380 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:57,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:57,481 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:57,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:57,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1859945351, now seen corresponding path program 8 times [2019-10-14 23:15:57,481 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:57,482 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185311184] [2019-10-14 23:15:57,482 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:57,482 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:57,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:57,494 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:57,497 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1268722289] [2019-10-14 23:15:57,497 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:57,529 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:15:57,530 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:57,531 WARN L254 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 43 conjunts are in the unsatisfiable core [2019-10-14 23:15:57,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:57,669 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:57,687 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185311184] [2019-10-14 23:15:57,688 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:57,688 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268722289] [2019-10-14 23:15:57,688 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:57,688 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-14 23:15:57,688 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635315430] [2019-10-14 23:15:57,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:15:57,689 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:57,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:15:57,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:15:57,690 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 12 states. [2019-10-14 23:15:57,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:57,811 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-10-14 23:15:57,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:15:57,812 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-10-14 23:15:57,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:57,813 INFO L225 Difference]: With dead ends: 24 [2019-10-14 23:15:57,813 INFO L226 Difference]: Without dead ends: 21 [2019-10-14 23:15:57,813 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:15:57,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-14 23:15:57,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-14 23:15:57,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-14 23:15:57,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-10-14 23:15:57,818 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2019-10-14 23:15:57,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:57,818 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-10-14 23:15:57,818 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:15:57,818 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-10-14 23:15:57,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 23:15:57,819 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:57,819 INFO L380 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:58,021 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:58,023 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:58,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:58,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1823668560, now seen corresponding path program 9 times [2019-10-14 23:15:58,024 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:58,025 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067459111] [2019-10-14 23:15:58,025 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:58,025 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:58,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:58,037 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:58,038 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434866345] [2019-10-14 23:15:58,038 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:58,073 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 23:15:58,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:58,074 WARN L254 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 47 conjunts are in the unsatisfiable core [2019-10-14 23:15:58,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:58,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:58,202 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067459111] [2019-10-14 23:15:58,202 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:58,202 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434866345] [2019-10-14 23:15:58,202 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:58,202 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-14 23:15:58,203 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020147200] [2019-10-14 23:15:58,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:15:58,203 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:58,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:15:58,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:15:58,204 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 13 states. [2019-10-14 23:15:58,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:58,387 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-10-14 23:15:58,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:15:58,387 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2019-10-14 23:15:58,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:58,388 INFO L225 Difference]: With dead ends: 25 [2019-10-14 23:15:58,388 INFO L226 Difference]: Without dead ends: 22 [2019-10-14 23:15:58,389 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:15:58,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-14 23:15:58,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-14 23:15:58,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-14 23:15:58,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-10-14 23:15:58,393 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2019-10-14 23:15:58,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:58,394 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-10-14 23:15:58,394 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:15:58,394 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-10-14 23:15:58,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 23:15:58,394 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:58,395 INFO L380 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:58,603 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:58,604 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:58,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:58,604 INFO L82 PathProgramCache]: Analyzing trace with hash 699088039, now seen corresponding path program 10 times [2019-10-14 23:15:58,604 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:58,605 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938176588] [2019-10-14 23:15:58,605 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:58,606 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:58,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:58,617 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:58,617 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431829990] [2019-10-14 23:15:58,617 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-10-14 23:15:58,705 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:15:58,705 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:58,707 WARN L254 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 51 conjunts are in the unsatisfiable core [2019-10-14 23:15:58,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:58,849 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:58,870 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:58,870 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938176588] [2019-10-14 23:15:58,870 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:58,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431829990] [2019-10-14 23:15:58,871 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:58,871 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-14 23:15:58,871 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548952206] [2019-10-14 23:15:58,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 23:15:58,872 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:58,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 23:15:58,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:15:58,873 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2019-10-14 23:15:59,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:59,008 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-10-14 23:15:59,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:15:59,009 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2019-10-14 23:15:59,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:59,010 INFO L225 Difference]: With dead ends: 26 [2019-10-14 23:15:59,010 INFO L226 Difference]: Without dead ends: 23 [2019-10-14 23:15:59,010 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:15:59,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-14 23:15:59,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-14 23:15:59,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 23:15:59,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-10-14 23:15:59,015 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2019-10-14 23:15:59,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:59,015 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-10-14 23:15:59,015 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 23:15:59,016 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-10-14 23:15:59,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 23:15:59,016 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:59,016 INFO L380 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:59,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:59,226 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:59,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:59,226 INFO L82 PathProgramCache]: Analyzing trace with hash 196830256, now seen corresponding path program 11 times [2019-10-14 23:15:59,226 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:59,227 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805290973] [2019-10-14 23:15:59,227 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:59,228 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:59,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:59,242 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:59,242 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877433575] [2019-10-14 23:15:59,242 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-10-14 23:15:59,291 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-14 23:15:59,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:59,293 WARN L254 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 55 conjunts are in the unsatisfiable core [2019-10-14 23:15:59,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:59,434 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:59,463 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:59,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805290973] [2019-10-14 23:15:59,464 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:59,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877433575] [2019-10-14 23:15:59,464 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:59,464 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-10-14 23:15:59,465 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601421613] [2019-10-14 23:15:59,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:15:59,465 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:59,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:15:59,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:15:59,466 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 15 states. [2019-10-14 23:15:59,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:59,627 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-10-14 23:15:59,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 23:15:59,628 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2019-10-14 23:15:59,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:59,629 INFO L225 Difference]: With dead ends: 27 [2019-10-14 23:15:59,629 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 23:15:59,630 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:15:59,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 23:15:59,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-14 23:15:59,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 23:15:59,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-10-14 23:15:59,634 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2019-10-14 23:15:59,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:59,635 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-10-14 23:15:59,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:15:59,635 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-10-14 23:15:59,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 23:15:59,636 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:59,636 INFO L380 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:59,839 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:59,840 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:59,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:59,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1806708167, now seen corresponding path program 12 times [2019-10-14 23:15:59,841 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:59,841 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040348412] [2019-10-14 23:15:59,841 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:59,841 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:59,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:59,853 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:59,854 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [165971749] [2019-10-14 23:15:59,854 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-10-14 23:15:59,895 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 23:15:59,895 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:59,897 WARN L254 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2019-10-14 23:15:59,899 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:00,047 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:00,124 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040348412] [2019-10-14 23:16:00,124 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:00,125 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165971749] [2019-10-14 23:16:00,125 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:00,125 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-10-14 23:16:00,125 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038777834] [2019-10-14 23:16:00,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:16:00,126 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:00,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:16:00,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:16:00,126 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 16 states. [2019-10-14 23:16:00,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:00,336 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-10-14 23:16:00,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 23:16:00,336 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2019-10-14 23:16:00,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:00,337 INFO L225 Difference]: With dead ends: 28 [2019-10-14 23:16:00,337 INFO L226 Difference]: Without dead ends: 25 [2019-10-14 23:16:00,337 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:16:00,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-14 23:16:00,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-14 23:16:00,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-14 23:16:00,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-10-14 23:16:00,342 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2019-10-14 23:16:00,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:00,343 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-10-14 23:16:00,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:16:00,343 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-10-14 23:16:00,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 23:16:00,344 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:00,344 INFO L380 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:00,546 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:00,551 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:00,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:00,552 INFO L82 PathProgramCache]: Analyzing trace with hash 173315856, now seen corresponding path program 13 times [2019-10-14 23:16:00,552 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:00,552 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767942375] [2019-10-14 23:16:00,553 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:00,553 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:00,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:00,568 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:00,568 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1666016832] [2019-10-14 23:16:00,568 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-10-14 23:16:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:00,618 WARN L254 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 63 conjunts are in the unsatisfiable core [2019-10-14 23:16:00,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:00,847 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:00,865 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:00,866 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767942375] [2019-10-14 23:16:00,866 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:00,866 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666016832] [2019-10-14 23:16:00,866 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:00,866 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-10-14 23:16:00,866 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056595209] [2019-10-14 23:16:00,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 23:16:00,867 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:00,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 23:16:00,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:16:00,868 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 17 states. [2019-10-14 23:16:01,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:01,069 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-10-14 23:16:01,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:16:01,069 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2019-10-14 23:16:01,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:01,070 INFO L225 Difference]: With dead ends: 29 [2019-10-14 23:16:01,071 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 23:16:01,072 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:16:01,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 23:16:01,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-14 23:16:01,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 23:16:01,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-10-14 23:16:01,079 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2019-10-14 23:16:01,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:01,079 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-10-14 23:16:01,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 23:16:01,079 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-10-14 23:16:01,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 23:16:01,080 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:01,080 INFO L380 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:01,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:01,284 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:01,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:01,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1077761767, now seen corresponding path program 14 times [2019-10-14 23:16:01,285 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:01,285 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653565317] [2019-10-14 23:16:01,285 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:01,285 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:01,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:01,297 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:01,298 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322650555] [2019-10-14 23:16:01,298 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-14 23:16:01,340 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:01,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:01,342 WARN L254 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 67 conjunts are in the unsatisfiable core [2019-10-14 23:16:01,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:01,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:01,574 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653565317] [2019-10-14 23:16:01,574 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:01,574 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322650555] [2019-10-14 23:16:01,574 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:01,574 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-10-14 23:16:01,574 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98284063] [2019-10-14 23:16:01,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 23:16:01,575 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:01,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 23:16:01,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:16:01,576 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2019-10-14 23:16:01,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:01,845 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-10-14 23:16:01,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 23:16:01,851 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2019-10-14 23:16:01,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:01,851 INFO L225 Difference]: With dead ends: 30 [2019-10-14 23:16:01,852 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 23:16:01,852 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:16:01,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 23:16:01,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-14 23:16:01,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 23:16:01,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-10-14 23:16:01,857 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2019-10-14 23:16:01,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:01,858 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-10-14 23:16:01,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 23:16:01,858 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-10-14 23:16:01,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 23:16:01,859 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:01,859 INFO L380 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:02,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:02,068 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:02,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:02,069 INFO L82 PathProgramCache]: Analyzing trace with hash -949186064, now seen corresponding path program 15 times [2019-10-14 23:16:02,069 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:02,069 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828725666] [2019-10-14 23:16:02,069 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:02,070 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:02,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:02,086 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:02,086 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487998879] [2019-10-14 23:16:02,087 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-14 23:16:02,160 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-14 23:16:02,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:02,162 WARN L254 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 71 conjunts are in the unsatisfiable core [2019-10-14 23:16:02,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:02,406 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:02,428 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828725666] [2019-10-14 23:16:02,428 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:02,428 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487998879] [2019-10-14 23:16:02,428 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:02,429 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-10-14 23:16:02,429 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251986778] [2019-10-14 23:16:02,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:16:02,429 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:02,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:16:02,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:16:02,430 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 19 states. [2019-10-14 23:16:02,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:02,728 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-10-14 23:16:02,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 23:16:02,732 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2019-10-14 23:16:02,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:02,733 INFO L225 Difference]: With dead ends: 31 [2019-10-14 23:16:02,733 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 23:16:02,734 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:16:02,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 23:16:02,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-14 23:16:02,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 23:16:02,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-10-14 23:16:02,738 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2019-10-14 23:16:02,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:02,739 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-10-14 23:16:02,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:16:02,739 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-10-14 23:16:02,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 23:16:02,740 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:02,740 INFO L380 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:02,943 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:02,943 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:02,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:02,944 INFO L82 PathProgramCache]: Analyzing trace with hash 639940615, now seen corresponding path program 16 times [2019-10-14 23:16:02,944 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:02,944 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087648325] [2019-10-14 23:16:02,945 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:02,945 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:02,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:02,955 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:02,955 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917802096] [2019-10-14 23:16:02,955 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-10-14 23:16:03,084 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:16:03,085 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:03,086 WARN L254 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 75 conjunts are in the unsatisfiable core [2019-10-14 23:16:03,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:03,304 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:03,325 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:03,325 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087648325] [2019-10-14 23:16:03,325 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:03,325 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917802096] [2019-10-14 23:16:03,326 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:03,326 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-10-14 23:16:03,326 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023206312] [2019-10-14 23:16:03,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:16:03,327 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:03,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:16:03,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:16:03,327 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 20 states. [2019-10-14 23:16:03,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:03,620 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-10-14 23:16:03,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:16:03,621 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2019-10-14 23:16:03,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:03,621 INFO L225 Difference]: With dead ends: 32 [2019-10-14 23:16:03,622 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 23:16:03,622 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:16:03,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 23:16:03,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-14 23:16:03,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:16:03,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-10-14 23:16:03,628 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2019-10-14 23:16:03,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:03,629 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-10-14 23:16:03,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:16:03,629 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-10-14 23:16:03,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 23:16:03,630 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:03,630 INFO L380 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:03,833 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:03,833 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:03,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:03,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1636739888, now seen corresponding path program 17 times [2019-10-14 23:16:03,834 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:03,834 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805160538] [2019-10-14 23:16:03,834 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:03,834 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:03,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:03,852 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:03,852 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898788405] [2019-10-14 23:16:03,852 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-10-14 23:16:03,911 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-10-14 23:16:03,911 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:03,913 WARN L254 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 79 conjunts are in the unsatisfiable core [2019-10-14 23:16:03,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:04,161 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:04,183 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:04,184 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805160538] [2019-10-14 23:16:04,184 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:04,184 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898788405] [2019-10-14 23:16:04,185 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:04,185 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-10-14 23:16:04,185 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619711936] [2019-10-14 23:16:04,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 23:16:04,186 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:04,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 23:16:04,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:16:04,186 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 21 states. [2019-10-14 23:16:04,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:04,502 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-10-14 23:16:04,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 23:16:04,502 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 28 [2019-10-14 23:16:04,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:04,503 INFO L225 Difference]: With dead ends: 33 [2019-10-14 23:16:04,503 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 23:16:04,504 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2019-10-14 23:16:04,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 23:16:04,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-10-14 23:16:04,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 23:16:04,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-10-14 23:16:04,509 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2019-10-14 23:16:04,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:04,510 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-10-14 23:16:04,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 23:16:04,510 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-10-14 23:16:04,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 23:16:04,510 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:04,510 INFO L380 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:04,713 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:04,714 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:04,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:04,714 INFO L82 PathProgramCache]: Analyzing trace with hash 800608551, now seen corresponding path program 18 times [2019-10-14 23:16:04,715 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:04,715 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083211278] [2019-10-14 23:16:04,715 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:04,715 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:04,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:04,726 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:04,727 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [611964257] [2019-10-14 23:16:04,727 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-10-14 23:16:04,801 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-10-14 23:16:04,801 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:04,803 WARN L254 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 83 conjunts are in the unsatisfiable core [2019-10-14 23:16:04,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:05,211 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:05,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083211278] [2019-10-14 23:16:05,242 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:05,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611964257] [2019-10-14 23:16:05,242 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:05,243 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-10-14 23:16:05,243 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486984069] [2019-10-14 23:16:05,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 23:16:05,243 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:05,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 23:16:05,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2019-10-14 23:16:05,244 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 22 states. [2019-10-14 23:16:05,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:05,626 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-10-14 23:16:05,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 23:16:05,626 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2019-10-14 23:16:05,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:05,627 INFO L225 Difference]: With dead ends: 34 [2019-10-14 23:16:05,627 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 23:16:05,628 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:16:05,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 23:16:05,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-14 23:16:05,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 23:16:05,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-10-14 23:16:05,640 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2019-10-14 23:16:05,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:05,640 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-10-14 23:16:05,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 23:16:05,640 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-10-14 23:16:05,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 23:16:05,642 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:05,642 INFO L380 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:05,845 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:05,846 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:05,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:05,846 INFO L82 PathProgramCache]: Analyzing trace with hash -951001168, now seen corresponding path program 19 times [2019-10-14 23:16:05,846 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:05,846 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875493235] [2019-10-14 23:16:05,846 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:05,847 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:05,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:05,861 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:05,861 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789078113] [2019-10-14 23:16:05,862 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-10-14 23:16:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:05,922 WARN L254 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 87 conjunts are in the unsatisfiable core [2019-10-14 23:16:05,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:06,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:06,296 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875493235] [2019-10-14 23:16:06,296 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:06,296 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789078113] [2019-10-14 23:16:06,296 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:06,296 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-10-14 23:16:06,296 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030885024] [2019-10-14 23:16:06,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 23:16:06,297 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:06,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 23:16:06,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:16:06,298 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 23 states. [2019-10-14 23:16:06,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:06,696 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-10-14 23:16:06,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 23:16:06,696 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2019-10-14 23:16:06,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:06,697 INFO L225 Difference]: With dead ends: 35 [2019-10-14 23:16:06,697 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 23:16:06,697 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:16:06,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 23:16:06,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-14 23:16:06,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 23:16:06,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-10-14 23:16:06,705 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2019-10-14 23:16:06,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:06,705 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-10-14 23:16:06,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 23:16:06,705 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-10-14 23:16:06,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 23:16:06,707 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:06,707 INFO L380 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:06,915 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:06,915 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:06,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:06,916 INFO L82 PathProgramCache]: Analyzing trace with hash 583672391, now seen corresponding path program 20 times [2019-10-14 23:16:06,916 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:06,916 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581436867] [2019-10-14 23:16:06,916 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:06,916 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:06,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:06,942 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:06,943 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248544425] [2019-10-14 23:16:06,943 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:07,038 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:07,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:07,040 WARN L254 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 91 conjunts are in the unsatisfiable core [2019-10-14 23:16:07,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:07,423 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:07,446 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:07,447 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581436867] [2019-10-14 23:16:07,447 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:07,447 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248544425] [2019-10-14 23:16:07,447 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:07,447 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-10-14 23:16:07,447 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058244717] [2019-10-14 23:16:07,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 23:16:07,448 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:07,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 23:16:07,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:16:07,449 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 24 states. [2019-10-14 23:16:07,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:07,867 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-10-14 23:16:07,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 23:16:07,867 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2019-10-14 23:16:07,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:07,868 INFO L225 Difference]: With dead ends: 36 [2019-10-14 23:16:07,868 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 23:16:07,869 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:16:07,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 23:16:07,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-14 23:16:07,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 23:16:07,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-10-14 23:16:07,873 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2019-10-14 23:16:07,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:07,874 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-10-14 23:16:07,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 23:16:07,874 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-10-14 23:16:07,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:16:07,874 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:07,875 INFO L380 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:08,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:08,078 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:08,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:08,079 INFO L82 PathProgramCache]: Analyzing trace with hash 913912464, now seen corresponding path program 21 times [2019-10-14 23:16:08,079 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:08,079 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482020363] [2019-10-14 23:16:08,079 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:08,080 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:08,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:08,092 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:08,092 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1921022915] [2019-10-14 23:16:08,092 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-14 23:16:08,245 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-10-14 23:16:08,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:08,247 WARN L254 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 95 conjunts are in the unsatisfiable core [2019-10-14 23:16:08,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:08,595 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:08,619 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:08,619 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482020363] [2019-10-14 23:16:08,619 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:08,619 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921022915] [2019-10-14 23:16:08,619 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:08,619 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-10-14 23:16:08,620 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281340506] [2019-10-14 23:16:08,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 23:16:08,620 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:08,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 23:16:08,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:16:08,623 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 25 states. [2019-10-14 23:16:09,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:09,073 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2019-10-14 23:16:09,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 23:16:09,076 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2019-10-14 23:16:09,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:09,077 INFO L225 Difference]: With dead ends: 37 [2019-10-14 23:16:09,077 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 23:16:09,078 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2019-10-14 23:16:09,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 23:16:09,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-14 23:16:09,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 23:16:09,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-10-14 23:16:09,082 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2019-10-14 23:16:09,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:09,083 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-10-14 23:16:09,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 23:16:09,083 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-10-14 23:16:09,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-14 23:16:09,083 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:09,084 INFO L380 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:09,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:09,287 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:09,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:09,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1733547161, now seen corresponding path program 22 times [2019-10-14 23:16:09,288 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:09,288 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990933103] [2019-10-14 23:16:09,288 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:09,289 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:09,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:09,297 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:09,298 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757704450] [2019-10-14 23:16:09,298 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-10-14 23:16:09,519 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:16:09,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:09,521 WARN L254 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 99 conjunts are in the unsatisfiable core [2019-10-14 23:16:09,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:09,868 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:09,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990933103] [2019-10-14 23:16:09,893 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:09,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757704450] [2019-10-14 23:16:09,893 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:09,893 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-10-14 23:16:09,893 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278793634] [2019-10-14 23:16:09,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 23:16:09,894 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:09,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 23:16:09,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2019-10-14 23:16:09,895 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 26 states. [2019-10-14 23:16:10,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:10,396 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2019-10-14 23:16:10,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 23:16:10,396 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 33 [2019-10-14 23:16:10,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:10,397 INFO L225 Difference]: With dead ends: 38 [2019-10-14 23:16:10,397 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 23:16:10,398 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:16:10,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 23:16:10,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-10-14 23:16:10,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 23:16:10,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-10-14 23:16:10,402 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2019-10-14 23:16:10,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:10,403 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-10-14 23:16:10,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-14 23:16:10,403 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-10-14 23:16:10,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:16:10,403 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:10,404 INFO L380 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:10,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:10,607 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:10,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:10,608 INFO L82 PathProgramCache]: Analyzing trace with hash 2094550384, now seen corresponding path program 23 times [2019-10-14 23:16:10,608 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:10,608 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745586279] [2019-10-14 23:16:10,608 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:10,609 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:10,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:10,623 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:10,623 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [149976899] [2019-10-14 23:16:10,623 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-10-14 23:16:10,689 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-10-14 23:16:10,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:10,691 WARN L254 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 103 conjunts are in the unsatisfiable core [2019-10-14 23:16:10,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:11,097 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:11,123 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:11,124 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745586279] [2019-10-14 23:16:11,124 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:11,124 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149976899] [2019-10-14 23:16:11,124 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:11,124 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-10-14 23:16:11,124 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250499874] [2019-10-14 23:16:11,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 23:16:11,125 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:11,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 23:16:11,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:16:11,126 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 27 states. [2019-10-14 23:16:11,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:11,643 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-10-14 23:16:11,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 23:16:11,644 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2019-10-14 23:16:11,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:11,645 INFO L225 Difference]: With dead ends: 39 [2019-10-14 23:16:11,645 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 23:16:11,646 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:16:11,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 23:16:11,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-14 23:16:11,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 23:16:11,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-10-14 23:16:11,650 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2019-10-14 23:16:11,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:11,651 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-10-14 23:16:11,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 23:16:11,651 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-10-14 23:16:11,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 23:16:11,651 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:11,651 INFO L380 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:11,855 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:11,855 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:11,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:11,856 INFO L82 PathProgramCache]: Analyzing trace with hash 506489991, now seen corresponding path program 24 times [2019-10-14 23:16:11,856 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:11,856 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493783620] [2019-10-14 23:16:11,856 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:11,857 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:11,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:11,870 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:11,871 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204422745] [2019-10-14 23:16:11,871 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-10-14 23:16:11,956 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 23:16:11,956 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:11,959 WARN L254 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 107 conjunts are in the unsatisfiable core [2019-10-14 23:16:11,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:12,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:12,442 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493783620] [2019-10-14 23:16:12,442 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:12,442 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204422745] [2019-10-14 23:16:12,442 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:12,442 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-10-14 23:16:12,442 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371707801] [2019-10-14 23:16:12,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 23:16:12,443 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:12,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 23:16:12,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:16:12,444 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 28 states. [2019-10-14 23:16:12,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:12,995 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-10-14 23:16:12,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 23:16:12,996 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2019-10-14 23:16:12,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:12,996 INFO L225 Difference]: With dead ends: 40 [2019-10-14 23:16:12,997 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 23:16:12,997 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2019-10-14 23:16:12,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 23:16:13,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-10-14 23:16:13,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 23:16:13,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-10-14 23:16:13,002 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2019-10-14 23:16:13,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:13,002 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-10-14 23:16:13,002 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 23:16:13,002 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-10-14 23:16:13,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 23:16:13,003 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:13,003 INFO L380 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:13,203 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:13,204 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:13,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:13,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1478741936, now seen corresponding path program 25 times [2019-10-14 23:16:13,205 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:13,205 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700762910] [2019-10-14 23:16:13,205 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:13,205 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:13,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:13,214 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:13,214 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750685980] [2019-10-14 23:16:13,214 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-10-14 23:16:13,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:13,282 WARN L254 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 111 conjunts are in the unsatisfiable core [2019-10-14 23:16:13,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:13,695 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:13,723 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700762910] [2019-10-14 23:16:13,723 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:13,723 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750685980] [2019-10-14 23:16:13,723 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:13,723 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-10-14 23:16:13,723 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754531441] [2019-10-14 23:16:13,724 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-14 23:16:13,724 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:13,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-14 23:16:13,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2019-10-14 23:16:13,725 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 29 states. [2019-10-14 23:16:14,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:14,315 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2019-10-14 23:16:14,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 23:16:14,315 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 36 [2019-10-14 23:16:14,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:14,316 INFO L225 Difference]: With dead ends: 41 [2019-10-14 23:16:14,316 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 23:16:14,317 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2019-10-14 23:16:14,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 23:16:14,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-14 23:16:14,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 23:16:14,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-10-14 23:16:14,322 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2019-10-14 23:16:14,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:14,322 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-10-14 23:16:14,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-14 23:16:14,323 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-10-14 23:16:14,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 23:16:14,323 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:14,323 INFO L380 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:14,526 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:14,527 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:14,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:14,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1403577767, now seen corresponding path program 26 times [2019-10-14 23:16:14,527 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:14,528 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603255712] [2019-10-14 23:16:14,528 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:14,528 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:14,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:14,536 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:14,537 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770572041] [2019-10-14 23:16:14,537 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-14 23:16:14,609 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:14,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:14,612 WARN L254 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 115 conjunts are in the unsatisfiable core [2019-10-14 23:16:14,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:15,062 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:15,102 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603255712] [2019-10-14 23:16:15,102 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:15,103 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770572041] [2019-10-14 23:16:15,103 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:15,103 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-10-14 23:16:15,103 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395290410] [2019-10-14 23:16:15,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 23:16:15,103 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:15,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 23:16:15,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2019-10-14 23:16:15,104 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 30 states. [2019-10-14 23:16:15,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:15,749 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-10-14 23:16:15,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 23:16:15,750 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2019-10-14 23:16:15,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:15,750 INFO L225 Difference]: With dead ends: 42 [2019-10-14 23:16:15,751 INFO L226 Difference]: Without dead ends: 39 [2019-10-14 23:16:15,751 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:16:15,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-14 23:16:15,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-10-14 23:16:15,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 23:16:15,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-10-14 23:16:15,755 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2019-10-14 23:16:15,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:15,755 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-10-14 23:16:15,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 23:16:15,756 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-10-14 23:16:15,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 23:16:15,756 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:15,756 INFO L380 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:15,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:15,957 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:15,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:15,957 INFO L82 PathProgramCache]: Analyzing trace with hash 561175344, now seen corresponding path program 27 times [2019-10-14 23:16:15,957 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:15,957 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939729414] [2019-10-14 23:16:15,958 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:15,958 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:15,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:15,966 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:15,967 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1866009602] [2019-10-14 23:16:15,967 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-14 23:16:16,303 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-10-14 23:16:16,303 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:16,306 WARN L254 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 119 conjunts are in the unsatisfiable core [2019-10-14 23:16:16,307 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:16,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:16,830 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:16,831 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939729414] [2019-10-14 23:16:16,831 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:16,831 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866009602] [2019-10-14 23:16:16,831 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:16,831 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-10-14 23:16:16,831 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124528135] [2019-10-14 23:16:16,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 23:16:16,832 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:16,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 23:16:16,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:16:16,833 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 31 states. [2019-10-14 23:16:17,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:17,497 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-10-14 23:16:17,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-14 23:16:17,498 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2019-10-14 23:16:17,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:17,499 INFO L225 Difference]: With dead ends: 43 [2019-10-14 23:16:17,499 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 23:16:17,499 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2019-10-14 23:16:17,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 23:16:17,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-14 23:16:17,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 23:16:17,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-10-14 23:16:17,505 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2019-10-14 23:16:17,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:17,506 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-10-14 23:16:17,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 23:16:17,506 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-10-14 23:16:17,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 23:16:17,506 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:17,506 INFO L380 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:17,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:17,710 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:17,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:17,711 INFO L82 PathProgramCache]: Analyzing trace with hash 216504007, now seen corresponding path program 28 times [2019-10-14 23:16:17,711 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:17,711 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126338723] [2019-10-14 23:16:17,712 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:17,712 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:17,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:17,720 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:17,721 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966761240] [2019-10-14 23:16:17,721 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-10-14 23:16:17,964 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:16:17,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:17,967 WARN L254 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 123 conjunts are in the unsatisfiable core [2019-10-14 23:16:17,968 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:18,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:18,563 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126338723] [2019-10-14 23:16:18,563 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:18,563 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966761240] [2019-10-14 23:16:18,563 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:18,564 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-10-14 23:16:18,564 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582455648] [2019-10-14 23:16:18,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-14 23:16:18,564 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:18,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-14 23:16:18,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2019-10-14 23:16:18,565 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 32 states. [2019-10-14 23:16:19,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:19,297 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2019-10-14 23:16:19,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 23:16:19,298 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 39 [2019-10-14 23:16:19,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:19,298 INFO L225 Difference]: With dead ends: 44 [2019-10-14 23:16:19,299 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 23:16:19,300 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:16:19,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 23:16:19,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-14 23:16:19,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 23:16:19,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-10-14 23:16:19,306 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2019-10-14 23:16:19,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:19,306 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-10-14 23:16:19,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-14 23:16:19,306 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-10-14 23:16:19,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 23:16:19,307 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:19,307 INFO L380 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:19,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:19,511 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:19,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:19,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1878372848, now seen corresponding path program 29 times [2019-10-14 23:16:19,512 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:19,512 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067612610] [2019-10-14 23:16:19,512 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:19,512 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:19,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:19,520 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:19,520 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779509725] [2019-10-14 23:16:19,520 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-10-14 23:16:19,617 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-10-14 23:16:19,618 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:19,620 WARN L254 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 127 conjunts are in the unsatisfiable core [2019-10-14 23:16:19,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:20,205 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:20,237 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:20,238 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067612610] [2019-10-14 23:16:20,238 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:20,238 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779509725] [2019-10-14 23:16:20,238 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:20,238 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-10-14 23:16:20,238 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624575651] [2019-10-14 23:16:20,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-14 23:16:20,239 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:20,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-14 23:16:20,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:16:20,239 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 33 states. [2019-10-14 23:16:21,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:21,007 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-10-14 23:16:21,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-14 23:16:21,008 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2019-10-14 23:16:21,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:21,008 INFO L225 Difference]: With dead ends: 45 [2019-10-14 23:16:21,009 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 23:16:21,010 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 23:16:21,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 23:16:21,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-10-14 23:16:21,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-14 23:16:21,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2019-10-14 23:16:21,014 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2019-10-14 23:16:21,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:21,014 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2019-10-14 23:16:21,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-14 23:16:21,014 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2019-10-14 23:16:21,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 23:16:21,014 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:21,014 INFO L380 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:21,215 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:21,215 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:21,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:21,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1899921383, now seen corresponding path program 30 times [2019-10-14 23:16:21,216 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:21,216 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236073694] [2019-10-14 23:16:21,217 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:21,217 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:21,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:21,225 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:21,225 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [497622387] [2019-10-14 23:16:21,226 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-10-14 23:16:21,398 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-10-14 23:16:21,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:21,401 WARN L254 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 131 conjunts are in the unsatisfiable core [2019-10-14 23:16:21,402 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:21,977 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:22,012 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:22,013 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236073694] [2019-10-14 23:16:22,013 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:22,013 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497622387] [2019-10-14 23:16:22,013 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:22,013 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-10-14 23:16:22,013 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766707124] [2019-10-14 23:16:22,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-14 23:16:22,014 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:22,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-14 23:16:22,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 23:16:22,014 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 34 states. [2019-10-14 23:16:22,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:22,828 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2019-10-14 23:16:22,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-14 23:16:22,833 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 41 [2019-10-14 23:16:22,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:22,834 INFO L225 Difference]: With dead ends: 46 [2019-10-14 23:16:22,834 INFO L226 Difference]: Without dead ends: 43 [2019-10-14 23:16:22,835 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 23:16:22,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-14 23:16:22,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-14 23:16:22,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 23:16:22,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-10-14 23:16:22,842 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2019-10-14 23:16:22,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:22,842 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-10-14 23:16:22,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-14 23:16:22,843 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-10-14 23:16:22,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 23:16:22,843 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:22,843 INFO L380 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:23,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:23,047 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:23,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:23,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1232041744, now seen corresponding path program 31 times [2019-10-14 23:16:23,048 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:23,048 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105849454] [2019-10-14 23:16:23,049 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:23,049 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:23,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:23,057 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:23,058 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326046070] [2019-10-14 23:16:23,058 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-10-14 23:16:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:23,155 WARN L254 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 135 conjunts are in the unsatisfiable core [2019-10-14 23:16:23,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:23,778 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:23,813 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105849454] [2019-10-14 23:16:23,813 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:23,813 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326046070] [2019-10-14 23:16:23,813 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:23,813 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-10-14 23:16:23,813 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956775656] [2019-10-14 23:16:23,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-14 23:16:23,814 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:23,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-14 23:16:23,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 23:16:23,815 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 35 states. [2019-10-14 23:16:24,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:24,653 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-10-14 23:16:24,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-14 23:16:24,654 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 42 [2019-10-14 23:16:24,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:24,655 INFO L225 Difference]: With dead ends: 47 [2019-10-14 23:16:24,655 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 23:16:24,656 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 23:16:24,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 23:16:24,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-14 23:16:24,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 23:16:24,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-10-14 23:16:24,660 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2019-10-14 23:16:24,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:24,660 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-10-14 23:16:24,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-14 23:16:24,660 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-10-14 23:16:24,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 23:16:24,661 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:24,661 INFO L380 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:24,861 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:24,862 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:24,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:24,863 INFO L82 PathProgramCache]: Analyzing trace with hash 461349127, now seen corresponding path program 32 times [2019-10-14 23:16:24,863 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:24,863 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324929414] [2019-10-14 23:16:24,864 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:24,864 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:24,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:24,872 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:24,873 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406879028] [2019-10-14 23:16:24,873 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-14 23:16:24,961 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:24,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:24,963 WARN L254 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 139 conjunts are in the unsatisfiable core [2019-10-14 23:16:24,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:25,631 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:25,676 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324929414] [2019-10-14 23:16:25,676 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:25,676 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406879028] [2019-10-14 23:16:25,676 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:25,676 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-10-14 23:16:25,676 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503676454] [2019-10-14 23:16:25,676 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-14 23:16:25,677 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:25,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-14 23:16:25,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 23:16:25,677 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 36 states. [2019-10-14 23:16:26,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:26,917 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-10-14 23:16:26,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-14 23:16:26,917 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2019-10-14 23:16:26,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:26,918 INFO L225 Difference]: With dead ends: 48 [2019-10-14 23:16:26,918 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 23:16:26,919 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 23:16:26,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 23:16:26,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-10-14 23:16:26,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-14 23:16:26,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-10-14 23:16:26,924 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2019-10-14 23:16:26,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:26,924 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-10-14 23:16:26,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-14 23:16:26,925 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-10-14 23:16:26,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-14 23:16:26,925 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:26,925 INFO L380 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:27,126 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:27,126 INFO L410 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:27,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:27,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1416858576, now seen corresponding path program 33 times [2019-10-14 23:16:27,127 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:27,127 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160561349] [2019-10-14 23:16:27,127 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:27,128 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:27,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:27,136 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:27,137 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638599321] [2019-10-14 23:16:27,137 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-14 23:16:27,826 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-10-14 23:16:27,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:27,829 WARN L254 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 143 conjunts are in the unsatisfiable core [2019-10-14 23:16:27,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:28,529 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:28,562 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160561349] [2019-10-14 23:16:28,562 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:28,563 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638599321] [2019-10-14 23:16:28,563 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:28,563 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2019-10-14 23:16:28,563 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933978337] [2019-10-14 23:16:28,563 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-14 23:16:28,563 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:28,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-14 23:16:28,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 23:16:28,564 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 37 states. [2019-10-14 23:16:29,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:29,508 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-10-14 23:16:29,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-10-14 23:16:29,508 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2019-10-14 23:16:29,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:29,509 INFO L225 Difference]: With dead ends: 49 [2019-10-14 23:16:29,510 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 23:16:29,511 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 23:16:29,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 23:16:29,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-14 23:16:29,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 23:16:29,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-10-14 23:16:29,516 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2019-10-14 23:16:29,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:29,516 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-10-14 23:16:29,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-14 23:16:29,516 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-10-14 23:16:29,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 23:16:29,517 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:29,517 INFO L380 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:29,720 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:29,721 INFO L410 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:29,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:29,721 INFO L82 PathProgramCache]: Analyzing trace with hash 972880423, now seen corresponding path program 34 times [2019-10-14 23:16:29,722 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:29,722 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744531799] [2019-10-14 23:16:29,722 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:29,722 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:29,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:29,730 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:29,730 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [452167908] [2019-10-14 23:16:29,730 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:30,044 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:16:30,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:30,046 WARN L254 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 147 conjunts are in the unsatisfiable core [2019-10-14 23:16:30,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:30,753 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:30,787 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744531799] [2019-10-14 23:16:30,787 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:30,787 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452167908] [2019-10-14 23:16:30,787 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:30,787 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-10-14 23:16:30,788 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110269402] [2019-10-14 23:16:30,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-14 23:16:30,788 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:30,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-14 23:16:30,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 23:16:30,789 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 38 states. [2019-10-14 23:16:31,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:31,782 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2019-10-14 23:16:31,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-14 23:16:31,783 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 45 [2019-10-14 23:16:31,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:31,783 INFO L225 Difference]: With dead ends: 50 [2019-10-14 23:16:31,783 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 23:16:31,784 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 23:16:31,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 23:16:31,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-10-14 23:16:31,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 23:16:31,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2019-10-14 23:16:31,790 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2019-10-14 23:16:31,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:31,790 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2019-10-14 23:16:31,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-14 23:16:31,790 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2019-10-14 23:16:31,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 23:16:31,791 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:31,791 INFO L380 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:31,994 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:31,995 INFO L410 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:31,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:31,995 INFO L82 PathProgramCache]: Analyzing trace with hash 94459568, now seen corresponding path program 35 times [2019-10-14 23:16:31,995 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:31,996 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524877439] [2019-10-14 23:16:31,996 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:31,996 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:31,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:32,004 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:32,005 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341565445] [2019-10-14 23:16:32,005 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-10-14 23:16:32,126 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-10-14 23:16:32,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:32,129 WARN L254 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 151 conjunts are in the unsatisfiable core [2019-10-14 23:16:32,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:33,073 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:33,111 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524877439] [2019-10-14 23:16:33,111 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:33,111 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341565445] [2019-10-14 23:16:33,111 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:33,111 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2019-10-14 23:16:33,111 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372278449] [2019-10-14 23:16:33,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-14 23:16:33,112 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:33,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-14 23:16:33,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 23:16:33,112 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 39 states. [2019-10-14 23:16:34,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:34,180 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-10-14 23:16:34,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-14 23:16:34,181 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 46 [2019-10-14 23:16:34,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:34,181 INFO L225 Difference]: With dead ends: 51 [2019-10-14 23:16:34,181 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 23:16:34,182 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2019-10-14 23:16:34,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 23:16:34,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-10-14 23:16:34,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-14 23:16:34,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-10-14 23:16:34,186 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2019-10-14 23:16:34,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:34,186 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-10-14 23:16:34,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-14 23:16:34,186 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-10-14 23:16:34,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 23:16:34,186 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:34,186 INFO L380 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:34,387 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:34,387 INFO L410 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:34,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:34,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1366783161, now seen corresponding path program 36 times [2019-10-14 23:16:34,388 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:34,388 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954751724] [2019-10-14 23:16:34,388 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:34,389 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:34,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:34,399 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:34,400 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381678732] [2019-10-14 23:16:34,400 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:34,639 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-14 23:16:34,639 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:34,642 WARN L254 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 155 conjunts are in the unsatisfiable core [2019-10-14 23:16:34,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:35,409 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:35,447 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954751724] [2019-10-14 23:16:35,447 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:35,447 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381678732] [2019-10-14 23:16:35,447 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:35,447 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-10-14 23:16:35,447 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847087901] [2019-10-14 23:16:35,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-14 23:16:35,448 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:35,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-14 23:16:35,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2019-10-14 23:16:35,449 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 40 states. [2019-10-14 23:16:36,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:36,553 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2019-10-14 23:16:36,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-14 23:16:36,554 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 47 [2019-10-14 23:16:36,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:36,555 INFO L225 Difference]: With dead ends: 52 [2019-10-14 23:16:36,555 INFO L226 Difference]: Without dead ends: 49 [2019-10-14 23:16:36,556 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2019-10-14 23:16:36,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-14 23:16:36,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-10-14 23:16:36,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 23:16:36,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-10-14 23:16:36,561 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2019-10-14 23:16:36,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:36,561 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-10-14 23:16:36,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-14 23:16:36,561 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-10-14 23:16:36,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-14 23:16:36,562 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:36,562 INFO L380 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:36,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:36,766 INFO L410 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:36,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:36,766 INFO L82 PathProgramCache]: Analyzing trace with hash 579332496, now seen corresponding path program 37 times [2019-10-14 23:16:36,767 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:36,767 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719467882] [2019-10-14 23:16:36,767 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:36,767 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:36,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:36,776 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:36,776 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964468228] [2019-10-14 23:16:36,776 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-10-14 23:16:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:36,921 WARN L254 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 159 conjunts are in the unsatisfiable core [2019-10-14 23:16:36,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:37,966 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:38,008 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719467882] [2019-10-14 23:16:38,008 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:38,008 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964468228] [2019-10-14 23:16:38,008 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:38,008 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2019-10-14 23:16:38,009 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717369144] [2019-10-14 23:16:38,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-14 23:16:38,009 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:38,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-14 23:16:38,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2019-10-14 23:16:38,010 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 41 states. [2019-10-14 23:16:39,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:39,181 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2019-10-14 23:16:39,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-10-14 23:16:39,182 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 48 [2019-10-14 23:16:39,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:39,183 INFO L225 Difference]: With dead ends: 53 [2019-10-14 23:16:39,183 INFO L226 Difference]: Without dead ends: 50 [2019-10-14 23:16:39,184 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 23:16:39,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-14 23:16:39,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-14 23:16:39,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-14 23:16:39,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2019-10-14 23:16:39,190 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2019-10-14 23:16:39,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:39,190 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2019-10-14 23:16:39,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-14 23:16:39,190 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2019-10-14 23:16:39,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-14 23:16:39,191 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:39,191 INFO L380 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:39,394 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:39,395 INFO L410 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:39,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:39,395 INFO L82 PathProgramCache]: Analyzing trace with hash 779375719, now seen corresponding path program 38 times [2019-10-14 23:16:39,395 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:39,395 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554879130] [2019-10-14 23:16:39,395 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:39,395 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:39,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:39,403 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:39,403 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [530544296] [2019-10-14 23:16:39,403 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:39,508 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:39,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:39,511 WARN L254 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 163 conjunts are in the unsatisfiable core [2019-10-14 23:16:39,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:40,382 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:40,426 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:40,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554879130] [2019-10-14 23:16:40,426 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:40,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530544296] [2019-10-14 23:16:40,427 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:40,427 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2019-10-14 23:16:40,427 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84707537] [2019-10-14 23:16:40,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-10-14 23:16:40,427 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:40,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-10-14 23:16:40,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 23:16:40,428 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 42 states. [2019-10-14 23:16:41,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:41,659 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-10-14 23:16:41,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-10-14 23:16:41,660 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 49 [2019-10-14 23:16:41,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:41,661 INFO L225 Difference]: With dead ends: 54 [2019-10-14 23:16:41,661 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 23:16:41,662 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2019-10-14 23:16:41,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 23:16:41,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-10-14 23:16:41,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 23:16:41,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2019-10-14 23:16:41,667 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2019-10-14 23:16:41,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:41,668 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2019-10-14 23:16:41,668 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-10-14 23:16:41,668 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2019-10-14 23:16:41,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 23:16:41,668 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:41,668 INFO L380 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:41,869 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:41,869 INFO L410 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:41,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:41,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1609218960, now seen corresponding path program 39 times [2019-10-14 23:16:41,870 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:41,870 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807020965] [2019-10-14 23:16:41,871 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:41,871 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:41,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:41,879 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:41,879 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998822044] [2019-10-14 23:16:41,880 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true