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/array-tiling/poly2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:50:10,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:50:10,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:50:10,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:50:10,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:50:10,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:50:10,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:50:10,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:50:10,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:50:10,268 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:50:10,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:50:10,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:50:10,270 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:50:10,271 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:50:10,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:50:10,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:50:10,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:50:10,275 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:50:10,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:50:10,279 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:50:10,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:50:10,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:50:10,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:50:10,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:50:10,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:50:10,286 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:50:10,286 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:50:10,287 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:50:10,288 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:50:10,288 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:50:10,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:50:10,289 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:50:10,292 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:50:10,293 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:50:10,294 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:50:10,294 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:50:10,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:50:10,298 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:50:10,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:50:10,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:50:10,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:50:10,304 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 21:50:10,327 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:50:10,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:50:10,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:50:10,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:50:10,329 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:50:10,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:50:10,330 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:50:10,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:50:10,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:50:10,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:50:10,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:50:10,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:50:10,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:50:10,332 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:50:10,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:50:10,333 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:50:10,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:50:10,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:50:10,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:50:10,333 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:50:10,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:50:10,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:50:10,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:50:10,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:50:10,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:50:10,335 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:50:10,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:50:10,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:50:10,335 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:50:10,605 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:50:10,621 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:50:10,625 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:50:10,626 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:50:10,626 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:50:10,627 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/poly2.c [2019-10-14 21:50:10,701 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46021328f/c8d3e1bd00a64a8793dc1174673f8f29/FLAGd1ed28da3 [2019-10-14 21:50:11,163 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:50:11,163 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/poly2.c [2019-10-14 21:50:11,169 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46021328f/c8d3e1bd00a64a8793dc1174673f8f29/FLAGd1ed28da3 [2019-10-14 21:50:11,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46021328f/c8d3e1bd00a64a8793dc1174673f8f29 [2019-10-14 21:50:11,601 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:50:11,603 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:50:11,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:50:11,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:50:11,609 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:50:11,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:50:11" (1/1) ... [2019-10-14 21:50:11,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3675282d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:11, skipping insertion in model container [2019-10-14 21:50:11,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:50:11" (1/1) ... [2019-10-14 21:50:11,621 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:50:11,638 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:50:11,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:50:11,896 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:50:11,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:50:12,042 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:50:12,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:12 WrapperNode [2019-10-14 21:50:12,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:50:12,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:50:12,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:50:12,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:50:12,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:12" (1/1) ... [2019-10-14 21:50:12,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:12" (1/1) ... [2019-10-14 21:50:12,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:12" (1/1) ... [2019-10-14 21:50:12,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:12" (1/1) ... [2019-10-14 21:50:12,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:12" (1/1) ... [2019-10-14 21:50:12,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:12" (1/1) ... [2019-10-14 21:50:12,110 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:12" (1/1) ... [2019-10-14 21:50:12,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:50:12,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:50:12,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:50:12,114 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:50:12,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:12" (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 21:50:12,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:50:12,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:50:12,189 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:50:12,189 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:50:12,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:50:12,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 21:50:12,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:50:12,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:50:12,189 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 21:50:12,190 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:50:12,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-14 21:50:12,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:50:12,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:50:12,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:50:12,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:50:12,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:50:12,519 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:50:12,520 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 21:50:12,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:50:12 BoogieIcfgContainer [2019-10-14 21:50:12,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:50:12,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:50:12,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:50:12,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:50:12,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:50:11" (1/3) ... [2019-10-14 21:50:12,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10985714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:50:12, skipping insertion in model container [2019-10-14 21:50:12,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:12" (2/3) ... [2019-10-14 21:50:12,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10985714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:50:12, skipping insertion in model container [2019-10-14 21:50:12,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:50:12" (3/3) ... [2019-10-14 21:50:12,529 INFO L109 eAbstractionObserver]: Analyzing ICFG poly2.c [2019-10-14 21:50:12,538 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:50:12,545 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:50:12,556 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:50:12,579 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:50:12,579 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:50:12,579 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:50:12,580 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:50:12,580 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:50:12,580 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:50:12,580 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:50:12,580 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:50:12,597 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-10-14 21:50:12,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:50:12,604 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:12,605 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:12,607 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:12,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:12,612 INFO L82 PathProgramCache]: Analyzing trace with hash -718269197, now seen corresponding path program 1 times [2019-10-14 21:50:12,620 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:12,620 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457175419] [2019-10-14 21:50:12,621 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:12,621 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:12,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:12,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:12,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:12,813 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 21:50:12,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457175419] [2019-10-14 21:50:12,815 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:50:12,815 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:50:12,815 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022125974] [2019-10-14 21:50:12,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:50:12,819 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:12,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:50:12,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:50:12,833 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2019-10-14 21:50:12,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:12,946 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2019-10-14 21:50:12,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:50:12,948 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-14 21:50:12,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:12,957 INFO L225 Difference]: With dead ends: 47 [2019-10-14 21:50:12,958 INFO L226 Difference]: Without dead ends: 23 [2019-10-14 21:50:12,962 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:50:12,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-14 21:50:12,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-14 21:50:13,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 21:50:13,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-14 21:50:13,004 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 16 [2019-10-14 21:50:13,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:13,005 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-14 21:50:13,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:50:13,005 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-14 21:50:13,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:50:13,006 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:13,006 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:13,007 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:13,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:13,008 INFO L82 PathProgramCache]: Analyzing trace with hash 506468199, now seen corresponding path program 1 times [2019-10-14 21:50:13,008 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:13,008 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130936048] [2019-10-14 21:50:13,009 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:13,009 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:13,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:13,033 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:50:13,033 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200228676] [2019-10-14 21:50:13,034 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 21:50:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:13,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:50:13,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:13,133 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 21:50:13,134 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130936048] [2019-10-14 21:50:13,134 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:50:13,134 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200228676] [2019-10-14 21:50:13,135 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:50:13,135 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:50:13,135 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877768064] [2019-10-14 21:50:13,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:50:13,137 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:13,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:50:13,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:50:13,138 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 3 states. [2019-10-14 21:50:13,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:13,203 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2019-10-14 21:50:13,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:50:13,204 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-14 21:50:13,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:13,205 INFO L225 Difference]: With dead ends: 39 [2019-10-14 21:50:13,205 INFO L226 Difference]: Without dead ends: 25 [2019-10-14 21:50:13,206 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:50:13,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-14 21:50:13,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-10-14 21:50:13,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 21:50:13,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-14 21:50:13,214 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2019-10-14 21:50:13,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:13,214 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-14 21:50:13,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:50:13,214 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-14 21:50:13,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 21:50:13,215 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:13,216 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:13,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:13,421 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:13,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:13,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1419313573, now seen corresponding path program 1 times [2019-10-14 21:50:13,422 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:13,422 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609322391] [2019-10-14 21:50:13,423 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:13,423 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:13,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:13,435 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:50:13,435 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077917372] [2019-10-14 21:50:13,436 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 21:50:13,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:13,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:50:13,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:13,622 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 21:50:13,622 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609322391] [2019-10-14 21:50:13,622 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:50:13,622 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077917372] [2019-10-14 21:50:13,623 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:50:13,623 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-14 21:50:13,623 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964704904] [2019-10-14 21:50:13,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:50:13,624 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:13,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:50:13,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:50:13,625 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2019-10-14 21:50:13,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:13,750 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2019-10-14 21:50:13,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:50:13,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-14 21:50:13,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:13,752 INFO L225 Difference]: With dead ends: 41 [2019-10-14 21:50:13,752 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 21:50:13,753 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:50:13,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 21:50:13,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-10-14 21:50:13,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:50:13,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-10-14 21:50:13,759 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2019-10-14 21:50:13,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:13,760 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-10-14 21:50:13,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:50:13,760 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-10-14 21:50:13,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:50:13,761 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:13,761 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:13,965 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:13,966 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:13,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:13,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1804577693, now seen corresponding path program 2 times [2019-10-14 21:50:13,966 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:13,967 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987553931] [2019-10-14 21:50:13,967 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:13,967 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:13,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:13,985 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:50:13,986 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1124084868] [2019-10-14 21:50:13,986 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 21:50:14,029 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 21:50:14,029 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:50:14,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:50:14,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:14,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:50:14,061 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987553931] [2019-10-14 21:50:14,062 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:50:14,062 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124084868] [2019-10-14 21:50:14,062 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:50:14,062 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:50:14,063 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968548348] [2019-10-14 21:50:14,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:50:14,063 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:14,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:50:14,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:50:14,064 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 4 states. [2019-10-14 21:50:14,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:14,159 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2019-10-14 21:50:14,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:50:14,160 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-10-14 21:50:14,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:14,162 INFO L225 Difference]: With dead ends: 43 [2019-10-14 21:50:14,163 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 21:50:14,163 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 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 21:50:14,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 21:50:14,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2019-10-14 21:50:14,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 21:50:14,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-10-14 21:50:14,174 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2019-10-14 21:50:14,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:14,174 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-10-14 21:50:14,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:50:14,174 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-10-14 21:50:14,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 21:50:14,175 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:14,175 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:14,378 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:14,379 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:14,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:14,380 INFO L82 PathProgramCache]: Analyzing trace with hash 908918625, now seen corresponding path program 1 times [2019-10-14 21:50:14,380 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:14,381 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486177555] [2019-10-14 21:50:14,382 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:14,382 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:14,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:14,394 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:50:14,394 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1198550752] [2019-10-14 21:50:14,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:50:14,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:14,438 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:50:14,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:50:14,477 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486177555] [2019-10-14 21:50:14,477 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:50:14,477 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198550752] [2019-10-14 21:50:14,478 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:50:14,478 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 21:50:14,478 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213426075] [2019-10-14 21:50:14,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:50:14,479 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:14,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:50:14,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:50:14,481 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 5 states. [2019-10-14 21:50:14,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:14,567 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2019-10-14 21:50:14,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:50:14,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-10-14 21:50:14,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:14,569 INFO L225 Difference]: With dead ends: 50 [2019-10-14 21:50:14,569 INFO L226 Difference]: Without dead ends: 39 [2019-10-14 21:50:14,570 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:50:14,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-14 21:50:14,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2019-10-14 21:50:14,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:50:14,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-10-14 21:50:14,577 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2019-10-14 21:50:14,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:14,577 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-10-14 21:50:14,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:50:14,577 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-10-14 21:50:14,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:50:14,578 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:14,578 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:14,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:14,780 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:14,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:14,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1533731551, now seen corresponding path program 2 times [2019-10-14 21:50:14,781 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:14,781 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702885916] [2019-10-14 21:50:14,782 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:14,782 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:14,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:14,792 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:50:14,792 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128619302] [2019-10-14 21:50:14,792 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 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 21:50:14,841 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:50:14,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:50:14,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 21:50:14,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:14,882 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:14,883 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:15,071 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-10-14 21:50:15,072 INFO L567 ElimStorePlain]: treesize reduction 5, result has 83.3 percent of original size [2019-10-14 21:50:15,084 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2019-10-14 21:50:15,085 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:15,154 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:15,155 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:15,155 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:21 [2019-10-14 21:50:15,301 INFO L341 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2019-10-14 21:50:15,302 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2019-10-14 21:50:15,303 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:15,310 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:15,310 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:15,311 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-10-14 21:50:15,342 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:15,353 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:15,354 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:15,438 INFO L341 Elim1Store]: treesize reduction 10, result has 91.9 percent of original size [2019-10-14 21:50:15,439 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 142 [2019-10-14 21:50:15,441 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:15,469 INFO L567 ElimStorePlain]: treesize reduction 133, result has 17.4 percent of original size [2019-10-14 21:50:15,470 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:15,470 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:112, output treesize:28 [2019-10-14 21:50:15,526 INFO L341 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2019-10-14 21:50:15,527 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 25 [2019-10-14 21:50:15,528 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:15,534 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:15,534 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:15,535 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2019-10-14 21:50:15,579 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:15,593 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:50:15,594 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:15,596 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:50:15,601 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2019-10-14 21:50:15,602 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:15,605 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:15,606 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:15,614 INFO L567 ElimStorePlain]: treesize reduction 5, result has 58.3 percent of original size [2019-10-14 21:50:15,614 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:15,615 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2019-10-14 21:50:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:15,681 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702885916] [2019-10-14 21:50:15,681 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:50:15,681 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128619302] [2019-10-14 21:50:15,682 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:50:15,682 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-14 21:50:15,683 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579096221] [2019-10-14 21:50:15,683 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:50:15,684 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:15,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:50:15,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:50:15,687 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 14 states. [2019-10-14 21:50:16,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:16,405 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2019-10-14 21:50:16,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:50:16,406 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2019-10-14 21:50:16,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:16,408 INFO L225 Difference]: With dead ends: 56 [2019-10-14 21:50:16,408 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 21:50:16,408 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:50:16,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 21:50:16,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2019-10-14 21:50:16,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:50:16,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-10-14 21:50:16,418 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 24 [2019-10-14 21:50:16,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:16,418 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-10-14 21:50:16,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:50:16,418 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-10-14 21:50:16,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 21:50:16,419 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:16,420 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:16,622 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:16,626 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:16,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:16,627 INFO L82 PathProgramCache]: Analyzing trace with hash 534556445, now seen corresponding path program 3 times [2019-10-14 21:50:16,627 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:16,627 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585687729] [2019-10-14 21:50:16,627 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:16,627 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:16,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:16,642 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:50:16,642 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150570305] [2019-10-14 21:50:16,642 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 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 21:50:16,717 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 21:50:16,717 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:50:16,718 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:50:16,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:16,782 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585687729] [2019-10-14 21:50:16,782 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:50:16,782 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150570305] [2019-10-14 21:50:16,782 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:50:16,783 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 21:50:16,783 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32595720] [2019-10-14 21:50:16,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:50:16,784 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:16,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:50:16,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:50:16,784 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 9 states. [2019-10-14 21:50:16,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:16,994 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2019-10-14 21:50:16,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:50:16,995 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2019-10-14 21:50:16,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:16,996 INFO L225 Difference]: With dead ends: 83 [2019-10-14 21:50:16,996 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 21:50:16,996 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:50:16,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 21:50:17,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2019-10-14 21:50:17,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 21:50:17,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2019-10-14 21:50:17,007 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 26 [2019-10-14 21:50:17,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:17,007 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2019-10-14 21:50:17,007 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:50:17,007 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2019-10-14 21:50:17,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 21:50:17,008 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:17,008 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:17,219 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:17,220 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:17,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:17,220 INFO L82 PathProgramCache]: Analyzing trace with hash 683531997, now seen corresponding path program 4 times [2019-10-14 21:50:17,221 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:17,221 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109302696] [2019-10-14 21:50:17,221 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:17,221 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:17,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:17,230 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:50:17,230 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347566561] [2019-10-14 21:50:17,230 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 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 21:50:17,294 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:50:17,294 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:50:17,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:50:17,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:17,356 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109302696] [2019-10-14 21:50:17,356 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:50:17,356 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347566561] [2019-10-14 21:50:17,356 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:50:17,356 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 21:50:17,357 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957460008] [2019-10-14 21:50:17,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:50:17,357 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:17,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:50:17,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:50:17,358 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 9 states. [2019-10-14 21:50:17,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:17,518 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2019-10-14 21:50:17,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:50:17,519 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2019-10-14 21:50:17,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:17,520 INFO L225 Difference]: With dead ends: 86 [2019-10-14 21:50:17,520 INFO L226 Difference]: Without dead ends: 68 [2019-10-14 21:50:17,521 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:50:17,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-14 21:50:17,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 52. [2019-10-14 21:50:17,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 21:50:17,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2019-10-14 21:50:17,530 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 26 [2019-10-14 21:50:17,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:17,531 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2019-10-14 21:50:17,531 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:50:17,531 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2019-10-14 21:50:17,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 21:50:17,532 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:17,532 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:17,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:17,745 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:17,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:17,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1746037861, now seen corresponding path program 5 times [2019-10-14 21:50:17,746 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:17,746 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080404404] [2019-10-14 21:50:17,746 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:17,746 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:17,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:17,755 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:50:17,755 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166542095] [2019-10-14 21:50:17,755 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 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