/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:12:14,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:12:14,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:12:14,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:12:14,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:12:14,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:12:14,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:12:14,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:12:14,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:12:14,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:12:14,241 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:12:14,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:12:14,244 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:12:14,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:12:14,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:12:14,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:12:14,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:12:14,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:12:14,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:12:14,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:12:14,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:12:14,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:12:14,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:12:14,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:12:14,262 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:12:14,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:12:14,270 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:12:14,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:12:14,272 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 [2019-11-23 22:12:14,294 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:12:14,295 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:12:14,296 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:12:14,297 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:12:14,297 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:12:14,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:12:14,297 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:12:14,298 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:12:14,298 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:12:14,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:12:14,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:12:14,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:12:14,299 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:12:14,299 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:12:14,299 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:12:14,299 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:12:14,299 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:12:14,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:12:14,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:12:14,300 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:12:14,300 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:12:14,300 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:12:14,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:12:14,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:12:14,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:12:14,301 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:12:14,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:12:14,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:12:14,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:12:14,302 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:12:14,551 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:12:14,568 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:12:14,572 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:12:14,573 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:12:14,573 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:12:14,574 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c [2019-11-23 22:12:14,635 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3ff2b1e8/4fb4a52b24fa40fabcadcf327feb1a22/FLAGf1fc8b9bf [2019-11-23 22:12:15,088 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:12:15,089 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c [2019-11-23 22:12:15,096 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3ff2b1e8/4fb4a52b24fa40fabcadcf327feb1a22/FLAGf1fc8b9bf [2019-11-23 22:12:15,472 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3ff2b1e8/4fb4a52b24fa40fabcadcf327feb1a22 [2019-11-23 22:12:15,484 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:12:15,486 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:12:15,488 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:12:15,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:12:15,492 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:12:15,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:12:15" (1/1) ... [2019-11-23 22:12:15,496 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70d5a3a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:15, skipping insertion in model container [2019-11-23 22:12:15,496 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:12:15" (1/1) ... [2019-11-23 22:12:15,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:12:15,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:12:15,710 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:12:15,714 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:12:15,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:12:15,747 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:12:15,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:15 WrapperNode [2019-11-23 22:12:15,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:12:15,748 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:12:15,748 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:12:15,749 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:12:15,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:15" (1/1) ... [2019-11-23 22:12:15,763 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:15" (1/1) ... [2019-11-23 22:12:15,854 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:12:15,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:12:15,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:12:15,854 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:12:15,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:15" (1/1) ... [2019-11-23 22:12:15,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:15" (1/1) ... [2019-11-23 22:12:15,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:15" (1/1) ... [2019-11-23 22:12:15,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:15" (1/1) ... [2019-11-23 22:12:15,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:15" (1/1) ... [2019-11-23 22:12:15,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:15" (1/1) ... [2019-11-23 22:12:15,872 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:15" (1/1) ... [2019-11-23 22:12:15,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:12:15,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:12:15,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:12:15,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:12:15,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:15" (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 [2019-11-23 22:12:15,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:12:15,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:12:16,177 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:12:16,177 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-23 22:12:16,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:12:16 BoogieIcfgContainer [2019-11-23 22:12:16,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:12:16,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:12:16,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:12:16,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:12:16,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:12:15" (1/3) ... [2019-11-23 22:12:16,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55eb7777 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:12:16, skipping insertion in model container [2019-11-23 22:12:16,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:15" (2/3) ... [2019-11-23 22:12:16,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55eb7777 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:12:16, skipping insertion in model container [2019-11-23 22:12:16,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:12:16" (3/3) ... [2019-11-23 22:12:16,190 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+lhb-reducer.c [2019-11-23 22:12:16,221 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:12:16,237 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:12:16,255 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:12:16,281 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:12:16,281 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:12:16,282 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:12:16,282 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:12:16,282 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:12:16,282 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:12:16,282 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:12:16,282 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:12:16,294 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-23 22:12:16,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 22:12:16,299 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:16,300 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:16,301 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:16,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:16,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1390787819, now seen corresponding path program 1 times [2019-11-23 22:12:16,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:16,313 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998784854] [2019-11-23 22:12:16,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:16,394 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:16,395 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129617397] [2019-11-23 22:12:16,395 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 [2019-11-23 22:12:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:16,447 WARN L253 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 22:12:16,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:16,654 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:16,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998784854] [2019-11-23 22:12:16,693 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:16,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129617397] [2019-11-23 22:12:16,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:12:16,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-23 22:12:16,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065308263] [2019-11-23 22:12:16,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:12:16,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:16,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:12:16,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:12:16,722 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 9 states. [2019-11-23 22:12:16,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:16,932 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2019-11-23 22:12:16,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:12:16,934 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-11-23 22:12:16,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:16,943 INFO L225 Difference]: With dead ends: 41 [2019-11-23 22:12:16,944 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 22:12:16,948 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:12:16,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 22:12:16,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-23 22:12:16,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 22:12:16,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-11-23 22:12:16,979 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-11-23 22:12:16,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:16,980 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-11-23 22:12:16,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:12:16,980 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-11-23 22:12:16,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 22:12:16,981 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:16,981 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:17,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:17,185 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:17,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:17,186 INFO L82 PathProgramCache]: Analyzing trace with hash -164811888, now seen corresponding path program 1 times [2019-11-23 22:12:17,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:17,187 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555370214] [2019-11-23 22:12:17,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:17,200 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:17,201 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [192690192] [2019-11-23 22:12:17,201 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 [2019-11-23 22:12:17,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:17,236 WARN L253 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 22:12:17,237 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:17,384 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:17,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:17,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555370214] [2019-11-23 22:12:17,409 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:17,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192690192] [2019-11-23 22:12:17,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:17,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-23 22:12:17,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550883490] [2019-11-23 22:12:17,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:12:17,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:17,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:12:17,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:12:17,414 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2019-11-23 22:12:17,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:17,542 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-11-23 22:12:17,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:12:17,552 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-11-23 22:12:17,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:17,555 INFO L225 Difference]: With dead ends: 18 [2019-11-23 22:12:17,555 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 22:12:17,557 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:12:17,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 22:12:17,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-23 22:12:17,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 22:12:17,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-11-23 22:12:17,563 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-11-23 22:12:17,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:17,563 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-11-23 22:12:17,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:12:17,564 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-11-23 22:12:17,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:12:17,564 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:17,564 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:17,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:17,765 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:17,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:17,766 INFO L82 PathProgramCache]: Analyzing trace with hash -814263691, now seen corresponding path program 2 times [2019-11-23 22:12:17,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:17,767 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214635665] [2019-11-23 22:12:17,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:17,784 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:17,785 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158844882] [2019-11-23 22:12:17,785 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 [2019-11-23 22:12:17,818 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:17,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:17,820 WARN L253 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 22:12:17,821 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:17,947 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:17,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:17,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214635665] [2019-11-23 22:12:17,972 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:17,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158844882] [2019-11-23 22:12:17,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:17,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-23 22:12:17,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557679372] [2019-11-23 22:12:17,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:12:17,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:17,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:12:17,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:12:17,975 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 11 states. [2019-11-23 22:12:18,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:18,092 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-11-23 22:12:18,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:12:18,093 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-11-23 22:12:18,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:18,094 INFO L225 Difference]: With dead ends: 19 [2019-11-23 22:12:18,094 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 22:12:18,095 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:12:18,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 22:12:18,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-23 22:12:18,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 22:12:18,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-11-23 22:12:18,102 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-11-23 22:12:18,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:18,104 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-11-23 22:12:18,104 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:12:18,104 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-11-23 22:12:18,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:12:18,105 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:18,105 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:18,306 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:18,306 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:18,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:18,307 INFO L82 PathProgramCache]: Analyzing trace with hash 527566896, now seen corresponding path program 3 times [2019-11-23 22:12:18,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:18,308 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923398590] [2019-11-23 22:12:18,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:18,325 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:18,326 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139580853] [2019-11-23 22:12:18,326 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 [2019-11-23 22:12:18,366 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 22:12:18,366 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:18,367 WARN L253 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-23 22:12:18,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:18,498 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:18,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:18,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923398590] [2019-11-23 22:12:18,517 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:18,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139580853] [2019-11-23 22:12:18,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:18,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-23 22:12:18,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562654330] [2019-11-23 22:12:18,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:12:18,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:18,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:12:18,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:12:18,520 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 12 states. [2019-11-23 22:12:18,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:18,627 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-11-23 22:12:18,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:12:18,628 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-11-23 22:12:18,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:18,628 INFO L225 Difference]: With dead ends: 20 [2019-11-23 22:12:18,629 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 22:12:18,629 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:12:18,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 22:12:18,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-23 22:12:18,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 22:12:18,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-11-23 22:12:18,633 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-11-23 22:12:18,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:18,634 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-11-23 22:12:18,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:12:18,634 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-11-23 22:12:18,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 22:12:18,635 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:18,635 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:18,837 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:18,839 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:18,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:18,840 INFO L82 PathProgramCache]: Analyzing trace with hash -825357867, now seen corresponding path program 4 times [2019-11-23 22:12:18,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:18,841 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264782418] [2019-11-23 22:12:18,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:18,865 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:18,865 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623271556] [2019-11-23 22:12:18,865 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 [2019-11-23 22:12:18,944 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:18,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:18,946 WARN L253 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 47 conjunts are in the unsatisfiable core [2019-11-23 22:12:18,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:19,082 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:19,105 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264782418] [2019-11-23 22:12:19,105 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:19,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623271556] [2019-11-23 22:12:19,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:19,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-23 22:12:19,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030798445] [2019-11-23 22:12:19,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:12:19,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:19,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:12:19,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:12:19,109 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 13 states. [2019-11-23 22:12:19,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:19,275 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-11-23 22:12:19,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:12:19,276 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-11-23 22:12:19,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:19,277 INFO L225 Difference]: With dead ends: 21 [2019-11-23 22:12:19,277 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 22:12:19,278 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:12:19,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 22:12:19,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-23 22:12:19,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 22:12:19,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-11-23 22:12:19,284 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2019-11-23 22:12:19,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:19,284 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-11-23 22:12:19,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:12:19,284 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-11-23 22:12:19,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:12:19,285 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:19,285 INFO L410 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:19,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:19,492 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:19,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:19,493 INFO L82 PathProgramCache]: Analyzing trace with hash 183647440, now seen corresponding path program 5 times [2019-11-23 22:12:19,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:19,494 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515408107] [2019-11-23 22:12:19,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:19,508 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:19,509 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505669661] [2019-11-23 22:12:19,509 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 [2019-11-23 22:12:19,548 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 22:12:19,548 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:19,550 WARN L253 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 51 conjunts are in the unsatisfiable core [2019-11-23 22:12:19,551 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:19,708 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:19,728 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:19,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515408107] [2019-11-23 22:12:19,730 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:19,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505669661] [2019-11-23 22:12:19,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:19,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-23 22:12:19,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491477119] [2019-11-23 22:12:19,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:12:19,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:19,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:12:19,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:12:19,733 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 14 states. [2019-11-23 22:12:19,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:19,865 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-11-23 22:12:19,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 22:12:19,868 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-11-23 22:12:19,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:19,869 INFO L225 Difference]: With dead ends: 22 [2019-11-23 22:12:19,869 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 22:12:19,870 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:12:19,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 22:12:19,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-23 22:12:19,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 22:12:19,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-11-23 22:12:19,874 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2019-11-23 22:12:19,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:19,874 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-11-23 22:12:19,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:12:19,874 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-11-23 22:12:19,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 22:12:19,875 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:19,875 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:20,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:20,079 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:20,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:20,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1398040885, now seen corresponding path program 6 times [2019-11-23 22:12:20,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:20,080 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959647480] [2019-11-23 22:12:20,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:20,093 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:20,094 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1144945743] [2019-11-23 22:12:20,094 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 [2019-11-23 22:12:20,138 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 22:12:20,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:20,140 WARN L253 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 55 conjunts are in the unsatisfiable core [2019-11-23 22:12:20,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:20,321 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:20,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959647480] [2019-11-23 22:12:20,340 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:20,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144945743] [2019-11-23 22:12:20,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:20,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-11-23 22:12:20,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448288149] [2019-11-23 22:12:20,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:12:20,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:20,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:12:20,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:12:20,342 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 15 states. [2019-11-23 22:12:20,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:20,549 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-11-23 22:12:20,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 22:12:20,550 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-11-23 22:12:20,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:20,551 INFO L225 Difference]: With dead ends: 23 [2019-11-23 22:12:20,551 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 22:12:20,552 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:12:20,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 22:12:20,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-23 22:12:20,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 22:12:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-11-23 22:12:20,557 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2019-11-23 22:12:20,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:20,558 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-11-23 22:12:20,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:12:20,558 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-11-23 22:12:20,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:12:20,559 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:20,559 INFO L410 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:20,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:20,760 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:20,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:20,761 INFO L82 PathProgramCache]: Analyzing trace with hash 389532016, now seen corresponding path program 7 times [2019-11-23 22:12:20,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:20,762 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168531018] [2019-11-23 22:12:20,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:20,774 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:20,774 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811102224] [2019-11-23 22:12:20,775 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 [2019-11-23 22:12:20,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:20,810 WARN L253 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 59 conjunts are in the unsatisfiable core [2019-11-23 22:12:20,812 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:21,000 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:21,021 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:21,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168531018] [2019-11-23 22:12:21,022 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:21,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811102224] [2019-11-23 22:12:21,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:21,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-11-23 22:12:21,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863889062] [2019-11-23 22:12:21,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:12:21,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:21,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:12:21,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:12:21,025 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 16 states. [2019-11-23 22:12:21,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:21,226 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-11-23 22:12:21,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:12:21,226 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-11-23 22:12:21,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:21,227 INFO L225 Difference]: With dead ends: 24 [2019-11-23 22:12:21,227 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 22:12:21,228 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:12:21,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 22:12:21,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-23 22:12:21,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 22:12:21,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-11-23 22:12:21,232 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2019-11-23 22:12:21,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:21,232 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-11-23 22:12:21,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:12:21,233 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-11-23 22:12:21,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 22:12:21,233 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:21,233 INFO L410 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:21,434 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:21,434 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:21,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:21,434 INFO L82 PathProgramCache]: Analyzing trace with hash -809471851, now seen corresponding path program 8 times [2019-11-23 22:12:21,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:21,435 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068569499] [2019-11-23 22:12:21,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:21,449 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:21,450 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920116240] [2019-11-23 22:12:21,450 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 [2019-11-23 22:12:21,487 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:21,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:21,489 WARN L253 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 63 conjunts are in the unsatisfiable core [2019-11-23 22:12:21,490 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:21,738 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:21,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068569499] [2019-11-23 22:12:21,762 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:21,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920116240] [2019-11-23 22:12:21,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:21,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-11-23 22:12:21,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795840935] [2019-11-23 22:12:21,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:12:21,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:21,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:12:21,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:12:21,764 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 17 states. [2019-11-23 22:12:21,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:21,959 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-11-23 22:12:21,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:12:21,959 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-11-23 22:12:21,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:21,960 INFO L225 Difference]: With dead ends: 25 [2019-11-23 22:12:21,960 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 22:12:21,961 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:12:21,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 22:12:21,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-23 22:12:21,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 22:12:21,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-11-23 22:12:21,965 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2019-11-23 22:12:21,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:21,966 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-11-23 22:12:21,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:12:21,966 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-11-23 22:12:21,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 22:12:21,967 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:21,967 INFO L410 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:22,170 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:22,170 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:22,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:22,171 INFO L82 PathProgramCache]: Analyzing trace with hash 676113936, now seen corresponding path program 9 times [2019-11-23 22:12:22,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:22,172 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643171561] [2019-11-23 22:12:22,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:22,190 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:22,190 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1587686888] [2019-11-23 22:12:22,190 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 [2019-11-23 22:12:22,235 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 22:12:22,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:22,236 WARN L253 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 67 conjunts are in the unsatisfiable core [2019-11-23 22:12:22,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:22,451 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:22,476 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:22,476 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643171561] [2019-11-23 22:12:22,477 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:22,477 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587686888] [2019-11-23 22:12:22,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:22,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-11-23 22:12:22,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027368477] [2019-11-23 22:12:22,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:12:22,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:22,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:12:22,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:12:22,478 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 18 states. [2019-11-23 22:12:22,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:22,730 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-11-23 22:12:22,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 22:12:22,730 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2019-11-23 22:12:22,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:22,731 INFO L225 Difference]: With dead ends: 26 [2019-11-23 22:12:22,732 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 22:12:22,733 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:12:22,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 22:12:22,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-23 22:12:22,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 22:12:22,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-11-23 22:12:22,736 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2019-11-23 22:12:22,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:22,736 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-11-23 22:12:22,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:12:22,737 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-11-23 22:12:22,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 22:12:22,737 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:22,737 INFO L410 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:22,938 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:22,938 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:22,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:22,939 INFO L82 PathProgramCache]: Analyzing trace with hash -515366923, now seen corresponding path program 10 times [2019-11-23 22:12:22,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:22,940 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060646521] [2019-11-23 22:12:22,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:22,951 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:22,951 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166173851] [2019-11-23 22:12:22,951 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 [2019-11-23 22:12:23,079 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:23,079 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:23,081 WARN L253 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 71 conjunts are in the unsatisfiable core [2019-11-23 22:12:23,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:23,320 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:23,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060646521] [2019-11-23 22:12:23,343 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:23,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166173851] [2019-11-23 22:12:23,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:23,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-11-23 22:12:23,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149858168] [2019-11-23 22:12:23,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 22:12:23,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:23,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 22:12:23,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:12:23,347 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 19 states. [2019-11-23 22:12:23,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:23,593 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-11-23 22:12:23,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:12:23,594 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2019-11-23 22:12:23,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:23,594 INFO L225 Difference]: With dead ends: 27 [2019-11-23 22:12:23,595 INFO L226 Difference]: Without dead ends: 24 [2019-11-23 22:12:23,596 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:12:23,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-23 22:12:23,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-23 22:12:23,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 22:12:23,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-11-23 22:12:23,601 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2019-11-23 22:12:23,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:23,601 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-11-23 22:12:23,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 22:12:23,601 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-11-23 22:12:23,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 22:12:23,602 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:23,602 INFO L410 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:23,802 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:23,803 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:23,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:23,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1203432112, now seen corresponding path program 11 times [2019-11-23 22:12:23,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:23,805 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137605910] [2019-11-23 22:12:23,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:23,823 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:23,824 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258238948] [2019-11-23 22:12:23,824 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 [2019-11-23 22:12:23,867 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-23 22:12:23,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:23,869 WARN L253 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 75 conjunts are in the unsatisfiable core [2019-11-23 22:12:23,871 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:24,124 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:24,147 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137605910] [2019-11-23 22:12:24,148 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:24,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258238948] [2019-11-23 22:12:24,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:24,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-11-23 22:12:24,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312975045] [2019-11-23 22:12:24,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:12:24,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:24,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:12:24,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:12:24,150 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 20 states. [2019-11-23 22:12:24,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:24,478 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-11-23 22:12:24,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:12:24,478 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2019-11-23 22:12:24,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:24,479 INFO L225 Difference]: With dead ends: 28 [2019-11-23 22:12:24,479 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 22:12:24,480 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:12:24,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 22:12:24,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-23 22:12:24,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 22:12:24,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-11-23 22:12:24,486 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2019-11-23 22:12:24,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:24,486 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-11-23 22:12:24,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:12:24,487 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-11-23 22:12:24,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 22:12:24,487 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:24,487 INFO L410 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:24,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:24,691 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:24,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:24,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1348372651, now seen corresponding path program 12 times [2019-11-23 22:12:24,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:24,692 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617497837] [2019-11-23 22:12:24,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:24,710 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:24,710 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2088025586] [2019-11-23 22:12:24,710 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 [2019-11-23 22:12:24,774 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 22:12:24,774 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:24,776 WARN L253 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 83 conjunts are in the unsatisfiable core [2019-11-23 22:12:24,777 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:25,082 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:25,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617497837] [2019-11-23 22:12:25,098 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:25,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088025586] [2019-11-23 22:12:25,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:25,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-11-23 22:12:25,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811160088] [2019-11-23 22:12:25,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 22:12:25,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:25,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 22:12:25,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:12:25,099 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 22 states. [2019-11-23 22:12:25,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:25,469 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-11-23 22:12:25,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 22:12:25,469 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2019-11-23 22:12:25,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:25,470 INFO L225 Difference]: With dead ends: 29 [2019-11-23 22:12:25,470 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 22:12:25,470 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:12:25,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 22:12:25,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-23 22:12:25,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 22:12:25,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-11-23 22:12:25,475 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2019-11-23 22:12:25,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:25,475 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-11-23 22:12:25,475 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 22:12:25,475 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-11-23 22:12:25,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 22:12:25,476 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:25,476 INFO L410 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:25,679 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:25,679 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:25,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:25,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1150058320, now seen corresponding path program 13 times [2019-11-23 22:12:25,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:25,681 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456406950] [2019-11-23 22:12:25,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:25,705 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:25,706 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [480360584] [2019-11-23 22:12:25,706 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 [2019-11-23 22:12:25,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:25,758 WARN L253 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 83 conjunts are in the unsatisfiable core [2019-11-23 22:12:25,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:26,018 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:26,042 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:26,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456406950] [2019-11-23 22:12:26,043 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:26,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480360584] [2019-11-23 22:12:26,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:26,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-11-23 22:12:26,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809644016] [2019-11-23 22:12:26,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 22:12:26,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:26,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 22:12:26,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:12:26,045 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 22 states. [2019-11-23 22:12:26,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:26,405 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-11-23 22:12:26,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 22:12:26,405 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2019-11-23 22:12:26,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:26,406 INFO L225 Difference]: With dead ends: 30 [2019-11-23 22:12:26,406 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 22:12:26,407 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:12:26,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 22:12:26,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-23 22:12:26,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:12:26,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-11-23 22:12:26,412 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2019-11-23 22:12:26,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:26,412 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-11-23 22:12:26,412 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 22:12:26,412 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-11-23 22:12:26,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 22:12:26,413 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:26,413 INFO L410 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:26,616 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:26,617 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:26,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:26,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1292007093, now seen corresponding path program 14 times [2019-11-23 22:12:26,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:26,618 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886676707] [2019-11-23 22:12:26,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:26,628 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:26,628 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596550617] [2019-11-23 22:12:26,628 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 [2019-11-23 22:12:26,675 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:26,675 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:26,677 WARN L253 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 87 conjunts are in the unsatisfiable core [2019-11-23 22:12:26,678 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:27,035 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:27,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886676707] [2019-11-23 22:12:27,065 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:27,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596550617] [2019-11-23 22:12:27,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:27,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-11-23 22:12:27,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224308825] [2019-11-23 22:12:27,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 22:12:27,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:27,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 22:12:27,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:12:27,067 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 23 states. [2019-11-23 22:12:27,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:27,410 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-11-23 22:12:27,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 22:12:27,414 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2019-11-23 22:12:27,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:27,414 INFO L225 Difference]: With dead ends: 31 [2019-11-23 22:12:27,414 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 22:12:27,415 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:12:27,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 22:12:27,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-23 22:12:27,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 22:12:27,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-11-23 22:12:27,420 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2019-11-23 22:12:27,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:27,420 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-11-23 22:12:27,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 22:12:27,420 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-11-23 22:12:27,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 22:12:27,421 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:27,421 INFO L410 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:27,624 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:27,625 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:27,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:27,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1397451760, now seen corresponding path program 15 times [2019-11-23 22:12:27,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:27,626 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592868097] [2019-11-23 22:12:27,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:27,636 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:27,636 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539218953] [2019-11-23 22:12:27,637 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 [2019-11-23 22:12:27,726 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 22:12:27,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:27,728 WARN L253 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 91 conjunts are in the unsatisfiable core [2019-11-23 22:12:27,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:28,015 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:28,038 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592868097] [2019-11-23 22:12:28,039 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:28,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539218953] [2019-11-23 22:12:28,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:28,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-11-23 22:12:28,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716095622] [2019-11-23 22:12:28,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 22:12:28,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:28,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 22:12:28,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:12:28,041 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 24 states. [2019-11-23 22:12:28,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:28,444 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-11-23 22:12:28,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 22:12:28,445 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2019-11-23 22:12:28,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:28,445 INFO L225 Difference]: With dead ends: 32 [2019-11-23 22:12:28,446 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 22:12:28,446 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:12:28,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 22:12:28,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-23 22:12:28,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 22:12:28,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-11-23 22:12:28,451 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2019-11-23 22:12:28,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:28,451 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-11-23 22:12:28,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 22:12:28,451 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-11-23 22:12:28,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 22:12:28,452 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:28,452 INFO L410 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:28,653 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:28,653 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:28,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:28,653 INFO L82 PathProgramCache]: Analyzing trace with hash 371269141, now seen corresponding path program 16 times [2019-11-23 22:12:28,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:28,653 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659150258] [2019-11-23 22:12:28,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:28,662 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:28,662 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091989608] [2019-11-23 22:12:28,662 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 [2019-11-23 22:12:28,824 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:28,824 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:28,826 WARN L253 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 95 conjunts are in the unsatisfiable core [2019-11-23 22:12:28,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:29,171 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:29,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659150258] [2019-11-23 22:12:29,194 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:29,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091989608] [2019-11-23 22:12:29,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:29,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-11-23 22:12:29,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937727193] [2019-11-23 22:12:29,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 22:12:29,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:29,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 22:12:29,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:12:29,197 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 25 states. [2019-11-23 22:12:29,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:29,604 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-11-23 22:12:29,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 22:12:29,604 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2019-11-23 22:12:29,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:29,605 INFO L225 Difference]: With dead ends: 33 [2019-11-23 22:12:29,605 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 22:12:29,606 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2019-11-23 22:12:29,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 22:12:29,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-11-23 22:12:29,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 22:12:29,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-11-23 22:12:29,611 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2019-11-23 22:12:29,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:29,611 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-11-23 22:12:29,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 22:12:29,611 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-11-23 22:12:29,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 22:12:29,612 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:29,612 INFO L410 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:29,820 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:29,821 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:29,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:29,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1375620976, now seen corresponding path program 17 times [2019-11-23 22:12:29,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:29,821 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224978426] [2019-11-23 22:12:29,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:29,829 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:29,830 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [24600083] [2019-11-23 22:12:29,830 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 [2019-11-23 22:12:29,882 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-23 22:12:29,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:29,884 WARN L253 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 99 conjunts are in the unsatisfiable core [2019-11-23 22:12:29,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:30,293 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:30,345 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:30,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224978426] [2019-11-23 22:12:30,345 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:30,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24600083] [2019-11-23 22:12:30,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:30,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-11-23 22:12:30,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823331582] [2019-11-23 22:12:30,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 22:12:30,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:30,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 22:12:30,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2019-11-23 22:12:30,347 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 26 states. [2019-11-23 22:12:30,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:30,894 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-11-23 22:12:30,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 22:12:30,895 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2019-11-23 22:12:30,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:30,895 INFO L225 Difference]: With dead ends: 34 [2019-11-23 22:12:30,895 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 22:12:30,896 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:12:30,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 22:12:30,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-11-23 22:12:30,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 22:12:30,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-11-23 22:12:30,901 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2019-11-23 22:12:30,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:30,901 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-11-23 22:12:30,901 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 22:12:30,901 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-11-23 22:12:30,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 22:12:30,902 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:30,902 INFO L410 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:31,105 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:31,105 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:31,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:31,106 INFO L82 PathProgramCache]: Analyzing trace with hash 305360245, now seen corresponding path program 18 times [2019-11-23 22:12:31,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:31,107 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002346573] [2019-11-23 22:12:31,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:31,115 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:31,115 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221896776] [2019-11-23 22:12:31,115 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 [2019-11-23 22:12:31,206 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-11-23 22:12:31,206 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:31,208 WARN L253 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 107 conjunts are in the unsatisfiable core [2019-11-23 22:12:31,209 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:31,730 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:31,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002346573] [2019-11-23 22:12:31,747 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:31,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221896776] [2019-11-23 22:12:31,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:31,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-11-23 22:12:31,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682111023] [2019-11-23 22:12:31,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 22:12:31,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:31,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 22:12:31,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:12:31,749 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 28 states. [2019-11-23 22:12:32,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:32,295 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-11-23 22:12:32,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 22:12:32,296 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 30 [2019-11-23 22:12:32,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:32,296 INFO L225 Difference]: With dead ends: 35 [2019-11-23 22:12:32,297 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 22:12:32,297 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:12:32,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 22:12:32,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-23 22:12:32,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 22:12:32,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-11-23 22:12:32,302 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2019-11-23 22:12:32,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:32,302 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-11-23 22:12:32,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 22:12:32,303 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-11-23 22:12:32,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 22:12:32,303 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:32,303 INFO L410 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:32,507 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:32,507 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:32,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:32,507 INFO L82 PathProgramCache]: Analyzing trace with hash 876170544, now seen corresponding path program 19 times [2019-11-23 22:12:32,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:32,508 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661759460] [2019-11-23 22:12:32,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:32,516 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:32,516 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [679249833] [2019-11-23 22:12:32,517 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 [2019-11-23 22:12:32,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:32,581 WARN L253 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 107 conjunts are in the unsatisfiable core [2019-11-23 22:12:32,582 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:32,975 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:33,004 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:33,004 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661759460] [2019-11-23 22:12:33,005 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:33,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679249833] [2019-11-23 22:12:33,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:33,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-11-23 22:12:33,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163865955] [2019-11-23 22:12:33,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 22:12:33,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:33,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 22:12:33,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:12:33,007 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 28 states. [2019-11-23 22:12:33,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:33,540 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-11-23 22:12:33,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 22:12:33,541 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2019-11-23 22:12:33,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:33,541 INFO L225 Difference]: With dead ends: 36 [2019-11-23 22:12:33,541 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 22:12:33,542 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:12:33,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 22:12:33,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-23 22:12:33,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 22:12:33,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-11-23 22:12:33,547 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2019-11-23 22:12:33,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:33,548 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-11-23 22:12:33,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 22:12:33,548 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-11-23 22:12:33,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 22:12:33,548 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:33,549 INFO L410 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:33,752 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:33,752 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:33,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:33,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1391420629, now seen corresponding path program 20 times [2019-11-23 22:12:33,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:33,753 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296967701] [2019-11-23 22:12:33,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:33,767 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:33,767 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757828549] [2019-11-23 22:12:33,767 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 [2019-11-23 22:12:33,818 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:33,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:33,820 WARN L253 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 111 conjunts are in the unsatisfiable core [2019-11-23 22:12:33,821 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:34,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:34,275 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:34,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296967701] [2019-11-23 22:12:34,276 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:34,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757828549] [2019-11-23 22:12:34,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:34,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-11-23 22:12:34,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151794023] [2019-11-23 22:12:34,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 22:12:34,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:34,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 22:12:34,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:12:34,277 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 29 states. [2019-11-23 22:12:34,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:34,858 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2019-11-23 22:12:34,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 22:12:34,859 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2019-11-23 22:12:34,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:34,859 INFO L225 Difference]: With dead ends: 37 [2019-11-23 22:12:34,859 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 22:12:34,860 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:12:34,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 22:12:34,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-11-23 22:12:34,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 22:12:34,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-11-23 22:12:34,867 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2019-11-23 22:12:34,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:34,867 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-11-23 22:12:34,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 22:12:34,867 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-11-23 22:12:34,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 22:12:34,868 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:34,868 INFO L410 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:35,071 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:35,071 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:35,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:35,072 INFO L82 PathProgramCache]: Analyzing trace with hash 184304080, now seen corresponding path program 21 times [2019-11-23 22:12:35,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:35,073 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990006715] [2019-11-23 22:12:35,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:35,094 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:35,094 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218060474] [2019-11-23 22:12:35,094 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 [2019-11-23 22:12:35,201 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 22:12:35,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:35,203 WARN L253 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 115 conjunts are in the unsatisfiable core [2019-11-23 22:12:35,204 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:35,648 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:35,677 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:35,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990006715] [2019-11-23 22:12:35,678 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:35,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218060474] [2019-11-23 22:12:35,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:35,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-11-23 22:12:35,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458860661] [2019-11-23 22:12:35,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 22:12:35,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:35,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 22:12:35,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:12:35,680 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 30 states. [2019-11-23 22:12:36,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:36,296 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2019-11-23 22:12:36,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 22:12:36,298 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2019-11-23 22:12:36,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:36,299 INFO L225 Difference]: With dead ends: 38 [2019-11-23 22:12:36,299 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 22:12:36,299 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:12:36,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 22:12:36,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-23 22:12:36,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 22:12:36,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-11-23 22:12:36,305 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2019-11-23 22:12:36,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:36,305 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-11-23 22:12:36,305 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 22:12:36,305 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-11-23 22:12:36,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 22:12:36,306 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:36,306 INFO L410 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:36,509 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:36,509 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:36,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:36,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1418396725, now seen corresponding path program 22 times [2019-11-23 22:12:36,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:36,510 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204826311] [2019-11-23 22:12:36,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:36,519 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:36,519 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602749311] [2019-11-23 22:12:36,519 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 [2019-11-23 22:12:36,734 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:36,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:36,736 WARN L253 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 119 conjunts are in the unsatisfiable core [2019-11-23 22:12:36,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:37,207 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:37,248 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:37,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204826311] [2019-11-23 22:12:37,249 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:37,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602749311] [2019-11-23 22:12:37,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:37,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-11-23 22:12:37,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831036975] [2019-11-23 22:12:37,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 22:12:37,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:37,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 22:12:37,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:12:37,251 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 31 states. [2019-11-23 22:12:37,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:37,883 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-11-23 22:12:37,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 22:12:37,883 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2019-11-23 22:12:37,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:37,884 INFO L225 Difference]: With dead ends: 39 [2019-11-23 22:12:37,884 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 22:12:37,885 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:12:37,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 22:12:37,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-23 22:12:37,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 22:12:37,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-11-23 22:12:37,890 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2019-11-23 22:12:37,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:37,891 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-11-23 22:12:37,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 22:12:37,891 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-11-23 22:12:37,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 22:12:37,891 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:37,891 INFO L410 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:38,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:38,095 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:38,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:38,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1020563056, now seen corresponding path program 23 times [2019-11-23 22:12:38,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:38,096 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116898154] [2019-11-23 22:12:38,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:38,104 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:38,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194547828] [2019-11-23 22:12:38,105 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 [2019-11-23 22:12:38,157 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-11-23 22:12:38,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:38,160 WARN L253 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 123 conjunts are in the unsatisfiable core [2019-11-23 22:12:38,161 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:38,707 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:38,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116898154] [2019-11-23 22:12:38,739 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:38,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194547828] [2019-11-23 22:12:38,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:38,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-11-23 22:12:38,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406417209] [2019-11-23 22:12:38,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 22:12:38,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:38,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 22:12:38,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:12:38,741 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 32 states. [2019-11-23 22:12:39,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:39,448 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-11-23 22:12:39,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 22:12:39,449 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2019-11-23 22:12:39,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:39,449 INFO L225 Difference]: With dead ends: 40 [2019-11-23 22:12:39,449 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 22:12:39,450 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:12:39,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 22:12:39,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-23 22:12:39,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 22:12:39,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-11-23 22:12:39,454 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2019-11-23 22:12:39,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:39,454 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-11-23 22:12:39,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 22:12:39,455 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-11-23 22:12:39,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 22:12:39,455 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:39,455 INFO L410 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:39,658 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:39,659 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:39,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:39,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1572621205, now seen corresponding path program 24 times [2019-11-23 22:12:39,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:39,659 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201677114] [2019-11-23 22:12:39,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:39,668 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:39,668 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1956748323] [2019-11-23 22:12:39,668 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 [2019-11-23 22:12:39,777 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 22:12:39,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:39,780 WARN L253 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 127 conjunts are in the unsatisfiable core [2019-11-23 22:12:39,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:40,329 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:40,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201677114] [2019-11-23 22:12:40,364 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:40,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956748323] [2019-11-23 22:12:40,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:40,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-11-23 22:12:40,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637362177] [2019-11-23 22:12:40,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 22:12:40,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:40,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 22:12:40,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:12:40,366 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 33 states. [2019-11-23 22:12:41,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:41,091 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2019-11-23 22:12:41,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 22:12:41,092 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2019-11-23 22:12:41,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:41,093 INFO L225 Difference]: With dead ends: 41 [2019-11-23 22:12:41,093 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 22:12:41,094 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:12:41,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 22:12:41,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-23 22:12:41,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 22:12:41,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-11-23 22:12:41,100 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2019-11-23 22:12:41,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:41,100 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-11-23 22:12:41,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 22:12:41,100 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-11-23 22:12:41,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 22:12:41,101 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:41,101 INFO L410 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:41,304 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:41,304 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:41,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:41,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1506554640, now seen corresponding path program 25 times [2019-11-23 22:12:41,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:41,305 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108358842] [2019-11-23 22:12:41,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:41,321 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:41,321 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741589766] [2019-11-23 22:12:41,321 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 [2019-11-23 22:12:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:41,385 WARN L253 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 131 conjunts are in the unsatisfiable core [2019-11-23 22:12:41,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:41,976 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:42,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108358842] [2019-11-23 22:12:42,009 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:42,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741589766] [2019-11-23 22:12:42,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:42,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-11-23 22:12:42,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617275167] [2019-11-23 22:12:42,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 22:12:42,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:42,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 22:12:42,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:12:42,010 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 34 states. [2019-11-23 22:12:42,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:42,783 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-11-23 22:12:42,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 22:12:42,784 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2019-11-23 22:12:42,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:42,784 INFO L225 Difference]: With dead ends: 42 [2019-11-23 22:12:42,784 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 22:12:42,785 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:12:42,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 22:12:42,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-23 22:12:42,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 22:12:42,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-11-23 22:12:42,791 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2019-11-23 22:12:42,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:42,791 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-11-23 22:12:42,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 22:12:42,792 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-11-23 22:12:42,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 22:12:42,792 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:42,792 INFO L410 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:42,993 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:42,993 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:42,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:42,994 INFO L82 PathProgramCache]: Analyzing trace with hash -541508875, now seen corresponding path program 26 times [2019-11-23 22:12:42,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:42,995 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384916847] [2019-11-23 22:12:42,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:43,003 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:43,003 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112731942] [2019-11-23 22:12:43,003 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 [2019-11-23 22:12:43,075 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:43,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:43,078 WARN L253 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 135 conjunts are in the unsatisfiable core [2019-11-23 22:12:43,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:43,712 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:43,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384916847] [2019-11-23 22:12:43,769 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:43,770 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112731942] [2019-11-23 22:12:43,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:43,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-11-23 22:12:43,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596034266] [2019-11-23 22:12:43,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 22:12:43,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:43,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 22:12:43,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:12:43,772 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 35 states. [2019-11-23 22:12:44,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:44,684 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-11-23 22:12:44,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 22:12:44,684 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2019-11-23 22:12:44,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:44,685 INFO L225 Difference]: With dead ends: 43 [2019-11-23 22:12:44,685 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 22:12:44,686 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:12:44,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 22:12:44,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-11-23 22:12:44,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 22:12:44,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-11-23 22:12:44,691 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2019-11-23 22:12:44,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:44,691 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-11-23 22:12:44,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 22:12:44,691 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-11-23 22:12:44,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 22:12:44,691 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:44,691 INFO L410 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:44,894 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:44,894 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:44,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:44,895 INFO L82 PathProgramCache]: Analyzing trace with hash 393031600, now seen corresponding path program 27 times [2019-11-23 22:12:44,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:44,896 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034781304] [2019-11-23 22:12:44,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:44,905 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:44,905 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142351562] [2019-11-23 22:12:44,906 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 [2019-11-23 22:12:45,228 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-11-23 22:12:45,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:45,230 WARN L253 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 139 conjunts are in the unsatisfiable core [2019-11-23 22:12:45,231 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:45,866 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:45,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034781304] [2019-11-23 22:12:45,900 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:45,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142351562] [2019-11-23 22:12:45,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:45,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-11-23 22:12:45,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962490046] [2019-11-23 22:12:45,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 22:12:45,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:45,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 22:12:45,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:12:45,902 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 36 states. [2019-11-23 22:12:46,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:46,823 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2019-11-23 22:12:46,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 22:12:46,823 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2019-11-23 22:12:46,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:46,824 INFO L225 Difference]: With dead ends: 44 [2019-11-23 22:12:46,824 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 22:12:46,824 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:12:46,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 22:12:46,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-23 22:12:46,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 22:12:46,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-11-23 22:12:46,829 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2019-11-23 22:12:46,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:46,829 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-11-23 22:12:46,829 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 22:12:46,829 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-11-23 22:12:46,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 22:12:46,830 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:46,830 INFO L410 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:47,033 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:47,034 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:47,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:47,034 INFO L82 PathProgramCache]: Analyzing trace with hash -700984747, now seen corresponding path program 28 times [2019-11-23 22:12:47,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:47,035 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093347538] [2019-11-23 22:12:47,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:47,043 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:47,043 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471314030] [2019-11-23 22:12:47,044 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 [2019-11-23 22:12:47,335 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:47,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:47,337 WARN L253 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 143 conjunts are in the unsatisfiable core [2019-11-23 22:12:47,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:48,145 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:48,183 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:48,183 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093347538] [2019-11-23 22:12:48,184 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:48,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471314030] [2019-11-23 22:12:48,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:48,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2019-11-23 22:12:48,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963073053] [2019-11-23 22:12:48,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 22:12:48,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:48,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 22:12:48,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:12:48,185 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 37 states. [2019-11-23 22:12:49,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:49,124 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-11-23 22:12:49,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 22:12:49,124 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2019-11-23 22:12:49,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:49,125 INFO L225 Difference]: With dead ends: 45 [2019-11-23 22:12:49,125 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 22:12:49,126 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 22:12:49,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 22:12:49,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-11-23 22:12:49,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 22:12:49,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2019-11-23 22:12:49,131 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2019-11-23 22:12:49,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:49,131 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2019-11-23 22:12:49,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 22:12:49,131 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2019-11-23 22:12:49,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 22:12:49,132 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:49,132 INFO L410 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:49,332 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:49,332 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:49,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:49,333 INFO L82 PathProgramCache]: Analyzing trace with hash -255753136, now seen corresponding path program 29 times [2019-11-23 22:12:49,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:49,334 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460011425] [2019-11-23 22:12:49,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:49,342 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:49,343 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946092526] [2019-11-23 22:12:49,343 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 [2019-11-23 22:12:49,440 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-11-23 22:12:49,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:49,444 WARN L253 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 147 conjunts are in the unsatisfiable core [2019-11-23 22:12:49,446 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:50,195 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:50,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460011425] [2019-11-23 22:12:50,234 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:50,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946092526] [2019-11-23 22:12:50,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:50,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-11-23 22:12:50,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970097131] [2019-11-23 22:12:50,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 22:12:50,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:50,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 22:12:50,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 22:12:50,236 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 38 states. [2019-11-23 22:12:51,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:51,245 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2019-11-23 22:12:51,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 22:12:51,245 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2019-11-23 22:12:51,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:51,246 INFO L225 Difference]: With dead ends: 46 [2019-11-23 22:12:51,246 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 22:12:51,247 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:12:51,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 22:12:51,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-11-23 22:12:51,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-23 22:12:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-11-23 22:12:51,252 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2019-11-23 22:12:51,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:51,253 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-11-23 22:12:51,253 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 22:12:51,253 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-11-23 22:12:51,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-23 22:12:51,253 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:51,253 INFO L410 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:51,456 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:51,457 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:51,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:51,457 INFO L82 PathProgramCache]: Analyzing trace with hash 661524917, now seen corresponding path program 30 times [2019-11-23 22:12:51,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:51,458 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333558481] [2019-11-23 22:12:51,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:51,466 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:51,466 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1235580290] [2019-11-23 22:12:51,467 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 [2019-11-23 22:12:51,927 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-11-23 22:12:51,928 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:51,931 WARN L253 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 151 conjunts are in the unsatisfiable core [2019-11-23 22:12:51,933 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:52,760 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:52,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333558481] [2019-11-23 22:12:52,795 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:52,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235580290] [2019-11-23 22:12:52,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:52,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2019-11-23 22:12:52,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562408576] [2019-11-23 22:12:52,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 22:12:52,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:52,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 22:12:52,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:12:52,797 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 39 states. [2019-11-23 22:12:53,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:53,832 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-11-23 22:12:53,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 22:12:53,833 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2019-11-23 22:12:53,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:53,834 INFO L225 Difference]: With dead ends: 47 [2019-11-23 22:12:53,834 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 22:12:53,836 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:12:53,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 22:12:53,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-23 22:12:53,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 22:12:53,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-11-23 22:12:53,845 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2019-11-23 22:12:53,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:53,845 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-11-23 22:12:53,845 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 22:12:53,846 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-11-23 22:12:53,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 22:12:53,846 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:53,846 INFO L410 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:54,048 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:54,049 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:54,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:54,050 INFO L82 PathProgramCache]: Analyzing trace with hash -967626512, now seen corresponding path program 31 times [2019-11-23 22:12:54,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:54,050 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788889976] [2019-11-23 22:12:54,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:54,059 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:54,059 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951919621] [2019-11-23 22:12:54,060 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 [2019-11-23 22:12:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:54,144 WARN L253 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 155 conjunts are in the unsatisfiable core [2019-11-23 22:12:54,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:55,071 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:55,152 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:55,152 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788889976] [2019-11-23 22:12:55,153 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:55,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951919621] [2019-11-23 22:12:55,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:55,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-11-23 22:12:55,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546654711] [2019-11-23 22:12:55,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 22:12:55,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:55,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 22:12:55,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:12:55,156 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 40 states. [2019-11-23 22:12:56,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:56,422 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-11-23 22:12:56,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 22:12:56,422 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2019-11-23 22:12:56,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:56,423 INFO L225 Difference]: With dead ends: 48 [2019-11-23 22:12:56,423 INFO L226 Difference]: Without dead ends: 45 [2019-11-23 22:12:56,424 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:12:56,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-23 22:12:56,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-11-23 22:12:56,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 22:12:56,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-11-23 22:12:56,428 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2019-11-23 22:12:56,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:56,429 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-11-23 22:12:56,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 22:12:56,429 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-11-23 22:12:56,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 22:12:56,429 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:56,429 INFO L410 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:56,630 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:56,630 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:56,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:56,630 INFO L82 PathProgramCache]: Analyzing trace with hash 68286741, now seen corresponding path program 32 times [2019-11-23 22:12:56,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:56,631 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660986587] [2019-11-23 22:12:56,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:56,638 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:56,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050061903] [2019-11-23 22:12:56,638 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 [2019-11-23 22:12:56,707 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:56,707 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:56,710 WARN L253 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 159 conjunts are in the unsatisfiable core [2019-11-23 22:12:56,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:57,535 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:57,577 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:57,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660986587] [2019-11-23 22:12:57,578 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:57,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050061903] [2019-11-23 22:12:57,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:57,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2019-11-23 22:12:57,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224888318] [2019-11-23 22:12:57,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 22:12:57,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:57,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 22:12:57,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:12:57,580 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 41 states. [2019-11-23 22:12:58,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:58,756 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-11-23 22:12:58,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 22:12:58,756 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2019-11-23 22:12:58,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:58,757 INFO L225 Difference]: With dead ends: 49 [2019-11-23 22:12:58,757 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 22:12:58,758 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:12:58,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 22:12:58,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-11-23 22:12:58,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 22:12:58,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-11-23 22:12:58,762 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2019-11-23 22:12:58,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:58,763 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-11-23 22:12:58,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 22:12:58,763 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-11-23 22:12:58,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 22:12:58,763 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:58,763 INFO L410 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:58,964 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:58,964 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:58,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:58,965 INFO L82 PathProgramCache]: Analyzing trace with hash 2116826512, now seen corresponding path program 33 times [2019-11-23 22:12:58,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:58,965 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736480795] [2019-11-23 22:12:58,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:58,973 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:58,973 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412454382] [2019-11-23 22:12:58,974 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 [2019-11-23 22:12:59,954 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-11-23 22:12:59,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:59,961 WARN L253 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 163 conjunts are in the unsatisfiable core [2019-11-23 22:12:59,962 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:00,794 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:00,835 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:00,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736480795] [2019-11-23 22:13:00,835 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:00,836 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412454382] [2019-11-23 22:13:00,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:00,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2019-11-23 22:13:00,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197615575] [2019-11-23 22:13:00,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 22:13:00,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:00,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 22:13:00,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:13:00,837 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 42 states. [2019-11-23 22:13:02,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:02,036 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2019-11-23 22:13:02,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 22:13:02,036 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2019-11-23 22:13:02,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:02,037 INFO L225 Difference]: With dead ends: 50 [2019-11-23 22:13:02,037 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 22:13:02,038 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:13:02,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 22:13:02,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-23 22:13:02,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 22:13:02,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2019-11-23 22:13:02,042 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2019-11-23 22:13:02,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:02,043 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2019-11-23 22:13:02,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 22:13:02,043 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2019-11-23 22:13:02,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 22:13:02,043 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:02,043 INFO L410 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:02,244 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:02,244 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:02,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:02,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1197049973, now seen corresponding path program 34 times [2019-11-23 22:13:02,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:02,245 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785588182] [2019-11-23 22:13:02,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:02,251 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:02,252 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174142965] [2019-11-23 22:13:02,252 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 [2019-11-23 22:13:02,597 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:13:02,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:02,600 WARN L253 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 167 conjunts are in the unsatisfiable core [2019-11-23 22:13:02,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:03,508 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:03,548 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:03,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785588182] [2019-11-23 22:13:03,549 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:03,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174142965] [2019-11-23 22:13:03,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:03,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2019-11-23 22:13:03,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445368509] [2019-11-23 22:13:03,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 22:13:03,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:03,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 22:13:03,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:13:03,550 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 43 states. [2019-11-23 22:13:04,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:04,771 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-11-23 22:13:04,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 22:13:04,772 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2019-11-23 22:13:04,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:04,772 INFO L225 Difference]: With dead ends: 51 [2019-11-23 22:13:04,773 INFO L226 Difference]: Without dead ends: 48 [2019-11-23 22:13:04,774 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=1805, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 22:13:04,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-23 22:13:04,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-11-23 22:13:04,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 22:13:04,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-11-23 22:13:04,779 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2019-11-23 22:13:04,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:04,779 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-11-23 22:13:04,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 22:13:04,779 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-11-23 22:13:04,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 22:13:04,780 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:04,780 INFO L410 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:04,981 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:04,981 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:04,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:04,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1546218960, now seen corresponding path program 35 times [2019-11-23 22:13:04,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:04,982 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810257947] [2019-11-23 22:13:04,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:04,990 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:04,991 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629116975] [2019-11-23 22:13:04,991 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 [2019-11-23 22:13:05,113 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-11-23 22:13:05,114 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:05,120 WARN L253 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 171 conjunts are in the unsatisfiable core [2019-11-23 22:13:05,123 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:06,238 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:06,281 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810257947] [2019-11-23 22:13:06,281 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:06,281 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629116975] [2019-11-23 22:13:06,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:06,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2019-11-23 22:13:06,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820381946] [2019-11-23 22:13:06,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 22:13:06,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:06,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 22:13:06,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 22:13:06,283 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 44 states. [2019-11-23 22:13:07,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:07,561 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2019-11-23 22:13:07,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 22:13:07,562 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2019-11-23 22:13:07,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:07,563 INFO L225 Difference]: With dead ends: 52 [2019-11-23 22:13:07,563 INFO L226 Difference]: Without dead ends: 49 [2019-11-23 22:13:07,564 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 22:13:07,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-23 22:13:07,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-11-23 22:13:07,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 22:13:07,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-11-23 22:13:07,569 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2019-11-23 22:13:07,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:07,569 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-11-23 22:13:07,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 22:13:07,569 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-11-23 22:13:07,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-23 22:13:07,570 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:07,570 INFO L410 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:07,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:07,773 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:07,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:07,774 INFO L82 PathProgramCache]: Analyzing trace with hash -688209963, now seen corresponding path program 36 times [2019-11-23 22:13:07,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:07,774 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970193875] [2019-11-23 22:13:07,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:07,782 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:07,782 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2064053555] [2019-11-23 22:13:07,782 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 [2019-11-23 22:13:08,254 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 22:13:08,254 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:08,259 WARN L253 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 175 conjunts are in the unsatisfiable core [2019-11-23 22:13:08,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:09,254 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:09,296 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:09,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970193875] [2019-11-23 22:13:09,296 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:09,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064053555] [2019-11-23 22:13:09,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:09,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2019-11-23 22:13:09,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766163172] [2019-11-23 22:13:09,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-23 22:13:09,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:09,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-23 22:13:09,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 22:13:09,298 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 45 states. [2019-11-23 22:13:10,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:10,639 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2019-11-23 22:13:10,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-23 22:13:10,639 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 48 [2019-11-23 22:13:10,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:10,640 INFO L225 Difference]: With dead ends: 53 [2019-11-23 22:13:10,640 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 22:13:10,642 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 22:13:10,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 22:13:10,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-23 22:13:10,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 22:13:10,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2019-11-23 22:13:10,646 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2019-11-23 22:13:10,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:10,646 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2019-11-23 22:13:10,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-23 22:13:10,647 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2019-11-23 22:13:10,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 22:13:10,647 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:10,647 INFO L410 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:10,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:10,851 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:10,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:10,852 INFO L82 PathProgramCache]: Analyzing trace with hash 140265168, now seen corresponding path program 37 times [2019-11-23 22:13:10,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:10,852 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300512547] [2019-11-23 22:13:10,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:10,858 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:10,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1956152232] [2019-11-23 22:13:10,859 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 [2019-11-23 22:13:10,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:10,942 WARN L253 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 179 conjunts are in the unsatisfiable core [2019-11-23 22:13:10,943 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:11,944 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:11,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300512547] [2019-11-23 22:13:11,988 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:11,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956152232] [2019-11-23 22:13:11,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:11,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2019-11-23 22:13:11,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043454106] [2019-11-23 22:13:11,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-23 22:13:11,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:11,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-23 22:13:11,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 22:13:11,990 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 46 states. [2019-11-23 22:13:13,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:13,412 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-11-23 22:13:13,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-23 22:13:13,413 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 49 [2019-11-23 22:13:13,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:13,413 INFO L225 Difference]: With dead ends: 54 [2019-11-23 22:13:13,413 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 22:13:13,414 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=2069, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 22:13:13,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 22:13:13,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-11-23 22:13:13,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-23 22:13:13,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2019-11-23 22:13:13,419 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2019-11-23 22:13:13,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:13,419 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2019-11-23 22:13:13,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-23 22:13:13,419 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2019-11-23 22:13:13,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 22:13:13,419 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:13,419 INFO L410 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:13,620 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:13,620 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:13,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:13,621 INFO L82 PathProgramCache]: Analyzing trace with hash 53190453, now seen corresponding path program 38 times [2019-11-23 22:13:13,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:13,621 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984558412] [2019-11-23 22:13:13,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:13,628 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:13,629 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539064230] [2019-11-23 22:13:13,629 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 [2019-11-23 22:13:13,713 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:13:13,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:13,716 WARN L253 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 183 conjunts are in the unsatisfiable core [2019-11-23 22:13:13,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:14,831 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:14,875 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:14,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984558412] [2019-11-23 22:13:14,875 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:14,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539064230] [2019-11-23 22:13:14,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:14,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2019-11-23 22:13:14,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645142515] [2019-11-23 22:13:14,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 22:13:14,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:14,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 22:13:14,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 22:13:14,876 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 47 states. [2019-11-23 22:13:16,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:16,338 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2019-11-23 22:13:16,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 22:13:16,338 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 50 [2019-11-23 22:13:16,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:16,339 INFO L225 Difference]: With dead ends: 55 [2019-11-23 22:13:16,339 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 22:13:16,340 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 22:13:16,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 22:13:16,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-23 22:13:16,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-23 22:13:16,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2019-11-23 22:13:16,344 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2019-11-23 22:13:16,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:16,345 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2019-11-23 22:13:16,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 22:13:16,345 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2019-11-23 22:13:16,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 22:13:16,345 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:16,346 INFO L410 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:16,548 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:16,549 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:16,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:16,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1648841584, now seen corresponding path program 39 times [2019-11-23 22:13:16,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:16,550 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649535632] [2019-11-23 22:13:16,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:16,558 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:16,558 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978618633] [2019-11-23 22:13:16,558 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 [2019-11-23 22:13:18,267 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-11-23 22:13:18,267 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:18,270 WARN L253 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 187 conjunts are in the unsatisfiable core [2019-11-23 22:13:18,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:19,376 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:19,422 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:19,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649535632] [2019-11-23 22:13:19,423 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:19,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978618633] [2019-11-23 22:13:19,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:19,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2019-11-23 22:13:19,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048440467] [2019-11-23 22:13:19,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-23 22:13:19,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:19,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-23 22:13:19,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 22:13:19,424 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 48 states. [2019-11-23 22:13:20,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:20,984 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2019-11-23 22:13:20,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-11-23 22:13:20,985 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 51 [2019-11-23 22:13:20,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:20,986 INFO L225 Difference]: With dead ends: 56 [2019-11-23 22:13:20,986 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 22:13:20,986 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 22:13:20,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 22:13:20,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-23 22:13:20,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 22:13:20,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2019-11-23 22:13:20,992 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2019-11-23 22:13:20,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:20,992 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2019-11-23 22:13:20,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-23 22:13:20,992 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2019-11-23 22:13:20,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 22:13:20,993 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:20,993 INFO L410 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:21,196 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:21,196 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:21,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:21,197 INFO L82 PathProgramCache]: Analyzing trace with hash -425580907, now seen corresponding path program 40 times [2019-11-23 22:13:21,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:21,197 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950985303] [2019-11-23 22:13:21,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:21,206 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:21,206 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191733922] [2019-11-23 22:13:21,206 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:21,656 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:13:21,656 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:21,659 WARN L253 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 191 conjunts are in the unsatisfiable core [2019-11-23 22:13:21,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:22,915 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:22,962 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:22,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950985303] [2019-11-23 22:13:22,962 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:22,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191733922] [2019-11-23 22:13:22,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:22,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2019-11-23 22:13:22,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974276726] [2019-11-23 22:13:22,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 22:13:22,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:22,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 22:13:22,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 22:13:22,964 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 49 states. [2019-11-23 22:13:24,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:24,578 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2019-11-23 22:13:24,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-23 22:13:24,579 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 52 [2019-11-23 22:13:24,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:24,579 INFO L225 Difference]: With dead ends: 57 [2019-11-23 22:13:24,579 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 22:13:24,580 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 22:13:24,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 22:13:24,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-11-23 22:13:24,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 22:13:24,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2019-11-23 22:13:24,585 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2019-11-23 22:13:24,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:24,585 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2019-11-23 22:13:24,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 22:13:24,586 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2019-11-23 22:13:24,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 22:13:24,586 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:24,586 INFO L410 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:24,786 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:24,787 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:24,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:24,787 INFO L82 PathProgramCache]: Analyzing trace with hash -308168688, now seen corresponding path program 41 times [2019-11-23 22:13:24,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:24,788 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256895725] [2019-11-23 22:13:24,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:24,796 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:24,796 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [612782316] [2019-11-23 22:13:24,796 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:24,955 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-11-23 22:13:24,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:24,958 WARN L253 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 195 conjunts are in the unsatisfiable core [2019-11-23 22:13:24,960 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:26,159 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:26,210 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:26,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256895725] [2019-11-23 22:13:26,211 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:26,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612782316] [2019-11-23 22:13:26,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:26,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2019-11-23 22:13:26,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266363629] [2019-11-23 22:13:26,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-11-23 22:13:26,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:26,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-11-23 22:13:26,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 22:13:26,212 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 50 states. [2019-11-23 22:13:27,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:27,890 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2019-11-23 22:13:27,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-11-23 22:13:27,890 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 53 [2019-11-23 22:13:27,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:27,891 INFO L225 Difference]: With dead ends: 58 [2019-11-23 22:13:27,891 INFO L226 Difference]: Without dead ends: 55 [2019-11-23 22:13:27,892 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=2449, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 22:13:27,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-23 22:13:27,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-11-23 22:13:27,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-23 22:13:27,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2019-11-23 22:13:27,899 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2019-11-23 22:13:27,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:27,899 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2019-11-23 22:13:27,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-11-23 22:13:27,899 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2019-11-23 22:13:27,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 22:13:27,900 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:27,900 INFO L410 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:28,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:28,104 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:28,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:28,104 INFO L82 PathProgramCache]: Analyzing trace with hash -963357195, now seen corresponding path program 42 times [2019-11-23 22:13:28,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:28,104 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434116240] [2019-11-23 22:13:28,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:28,113 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:28,113 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [357368650] [2019-11-23 22:13:28,114 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:28,674 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2019-11-23 22:13:28,675 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:28,679 WARN L253 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 199 conjunts are in the unsatisfiable core [2019-11-23 22:13:28,680 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:29,885 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:29,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434116240] [2019-11-23 22:13:29,938 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:29,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357368650] [2019-11-23 22:13:29,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:29,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2019-11-23 22:13:29,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026667988] [2019-11-23 22:13:29,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 22:13:29,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:29,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 22:13:29,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 22:13:29,940 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 51 states. [2019-11-23 22:13:31,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:31,728 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2019-11-23 22:13:31,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-11-23 22:13:31,728 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 54 [2019-11-23 22:13:31,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:31,728 INFO L225 Difference]: With dead ends: 59 [2019-11-23 22:13:31,728 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 22:13:31,729 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 22:13:31,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 22:13:31,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-23 22:13:31,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 22:13:31,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2019-11-23 22:13:31,734 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2019-11-23 22:13:31,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:31,735 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2019-11-23 22:13:31,735 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 22:13:31,735 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2019-11-23 22:13:31,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 22:13:31,735 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:31,736 INFO L410 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:31,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:31,938 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:31,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:31,938 INFO L82 PathProgramCache]: Analyzing trace with hash 200635568, now seen corresponding path program 43 times [2019-11-23 22:13:31,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:31,939 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20643987] [2019-11-23 22:13:31,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:31,945 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:31,945 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1788468745] [2019-11-23 22:13:31,945 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:32,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:32,045 WARN L253 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 203 conjunts are in the unsatisfiable core [2019-11-23 22:13:32,047 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:33,332 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:33,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20643987] [2019-11-23 22:13:33,386 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:33,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788468745] [2019-11-23 22:13:33,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:33,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2019-11-23 22:13:33,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243913677] [2019-11-23 22:13:33,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-11-23 22:13:33,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:33,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-11-23 22:13:33,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 22:13:33,387 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 52 states. [2019-11-23 22:13:35,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:35,209 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2019-11-23 22:13:35,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-11-23 22:13:35,210 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 55 [2019-11-23 22:13:35,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:35,211 INFO L225 Difference]: With dead ends: 60 [2019-11-23 22:13:35,211 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 22:13:35,211 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 22:13:35,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 22:13:35,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-11-23 22:13:35,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-23 22:13:35,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-11-23 22:13:35,216 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2019-11-23 22:13:35,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:35,217 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-11-23 22:13:35,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-11-23 22:13:35,217 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-11-23 22:13:35,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 22:13:35,217 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:35,217 INFO L410 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:35,417 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:35,418 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:35,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:35,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1924672853, now seen corresponding path program 44 times [2019-11-23 22:13:35,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:35,419 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925227037] [2019-11-23 22:13:35,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:35,427 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:35,427 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65028421] [2019-11-23 22:13:35,427 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:35,599 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:13:35,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:35,606 WARN L253 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 207 conjunts are in the unsatisfiable core [2019-11-23 22:13:35,609 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:36,969 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:37,021 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:37,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925227037] [2019-11-23 22:13:37,021 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:37,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65028421] [2019-11-23 22:13:37,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:37,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2019-11-23 22:13:37,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334985176] [2019-11-23 22:13:37,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-11-23 22:13:37,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:37,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-11-23 22:13:37,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 22:13:37,023 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 53 states. [2019-11-23 22:13:38,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:38,895 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2019-11-23 22:13:38,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-11-23 22:13:38,896 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 56 [2019-11-23 22:13:38,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:38,896 INFO L225 Difference]: With dead ends: 61 [2019-11-23 22:13:38,897 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 22:13:38,897 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2019-11-23 22:13:38,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 22:13:38,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-23 22:13:38,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 22:13:38,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2019-11-23 22:13:38,904 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2019-11-23 22:13:38,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:38,904 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2019-11-23 22:13:38,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-11-23 22:13:38,904 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2019-11-23 22:13:38,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 22:13:38,905 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:38,905 INFO L410 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:39,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:39,108 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:39,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:39,109 INFO L82 PathProgramCache]: Analyzing trace with hash -464746160, now seen corresponding path program 45 times [2019-11-23 22:13:39,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:39,110 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457422990] [2019-11-23 22:13:39,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:39,118 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:39,119 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599219482] [2019-11-23 22:13:39,119 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:42,978 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-11-23 22:13:42,979 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:42,982 WARN L253 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 211 conjunts are in the unsatisfiable core [2019-11-23 22:13:42,983 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:44,352 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:44,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457422990] [2019-11-23 22:13:44,406 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:44,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599219482] [2019-11-23 22:13:44,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:44,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2019-11-23 22:13:44,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941381005] [2019-11-23 22:13:44,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-11-23 22:13:44,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:44,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-11-23 22:13:44,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2019-11-23 22:13:44,407 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 54 states. [2019-11-23 22:13:46,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:46,401 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2019-11-23 22:13:46,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-11-23 22:13:46,401 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 57 [2019-11-23 22:13:46,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:46,402 INFO L225 Difference]: With dead ends: 62 [2019-11-23 22:13:46,402 INFO L226 Difference]: Without dead ends: 59 [2019-11-23 22:13:46,402 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 22:13:46,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-23 22:13:46,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-11-23 22:13:46,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 22:13:46,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2019-11-23 22:13:46,407 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2019-11-23 22:13:46,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:46,408 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2019-11-23 22:13:46,408 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-11-23 22:13:46,408 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2019-11-23 22:13:46,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-23 22:13:46,408 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:46,408 INFO L410 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:46,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:46,609 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:46,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:46,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1522291531, now seen corresponding path program 46 times [2019-11-23 22:13:46,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:46,610 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009820587] [2019-11-23 22:13:46,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:46,618 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:46,619 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008645411] [2019-11-23 22:13:46,619 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:47,141 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:13:47,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:47,145 WARN L253 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 215 conjunts are in the unsatisfiable core [2019-11-23 22:13:47,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:48,591 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:48,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009820587] [2019-11-23 22:13:48,644 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:48,645 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008645411] [2019-11-23 22:13:48,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:48,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2019-11-23 22:13:48,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131133895] [2019-11-23 22:13:48,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-11-23 22:13:48,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:48,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-11-23 22:13:48,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 22:13:48,646 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 55 states. [2019-11-23 22:13:50,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:50,737 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2019-11-23 22:13:50,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-11-23 22:13:50,738 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 58 [2019-11-23 22:13:50,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:50,738 INFO L225 Difference]: With dead ends: 63 [2019-11-23 22:13:50,739 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 22:13:50,739 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 22:13:50,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 22:13:50,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-11-23 22:13:50,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-23 22:13:50,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2019-11-23 22:13:50,745 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2019-11-23 22:13:50,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:50,745 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2019-11-23 22:13:50,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-11-23 22:13:50,745 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2019-11-23 22:13:50,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 22:13:50,745 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:50,745 INFO L410 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:50,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:50,946 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:50,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:50,947 INFO L82 PathProgramCache]: Analyzing trace with hash 53540336, now seen corresponding path program 47 times [2019-11-23 22:13:50,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:50,947 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988206310] [2019-11-23 22:13:50,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:50,955 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:50,956 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782160110] [2019-11-23 22:13:50,956 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:51,108 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-11-23 22:13:51,108 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:51,112 WARN L253 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 219 conjunts are in the unsatisfiable core [2019-11-23 22:13:51,114 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:52,644 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:52,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988206310] [2019-11-23 22:13:52,697 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:52,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782160110] [2019-11-23 22:13:52,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:52,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2019-11-23 22:13:52,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796735808] [2019-11-23 22:13:52,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-11-23 22:13:52,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:52,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-11-23 22:13:52,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 22:13:52,698 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 56 states. [2019-11-23 22:13:54,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:54,883 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2019-11-23 22:13:54,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-11-23 22:13:54,884 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 59 [2019-11-23 22:13:54,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:54,885 INFO L225 Difference]: With dead ends: 64 [2019-11-23 22:13:54,885 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 22:13:54,885 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2019-11-23 22:13:54,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 22:13:54,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-11-23 22:13:54,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-23 22:13:54,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2019-11-23 22:13:54,893 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2019-11-23 22:13:54,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:54,893 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2019-11-23 22:13:54,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-11-23 22:13:54,893 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2019-11-23 22:13:54,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 22:13:54,894 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:54,894 INFO L410 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:55,097 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:55,098 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:55,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:55,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1659687957, now seen corresponding path program 48 times [2019-11-23 22:13:55,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:55,098 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954684413] [2019-11-23 22:13:55,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:55,106 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:55,106 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638686534] [2019-11-23 22:13:55,106 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:55,722 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-11-23 22:13:55,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:55,728 WARN L253 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 223 conjunts are in the unsatisfiable core [2019-11-23 22:13:55,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:57,262 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:57,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954684413] [2019-11-23 22:13:57,320 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:57,321 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638686534] [2019-11-23 22:13:57,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:57,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2019-11-23 22:13:57,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341226200] [2019-11-23 22:13:57,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-11-23 22:13:57,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:57,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-11-23 22:13:57,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2019-11-23 22:13:57,322 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 57 states.