/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/rangesum40.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:10:48,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:10:48,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:10:48,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:10:48,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:10:48,239 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:10:48,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:10:48,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:10:48,244 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:10:48,244 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:10:48,245 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:10:48,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:10:48,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:10:48,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:10:48,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:10:48,249 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:10:48,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:10:48,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:10:48,252 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:10:48,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:10:48,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:10:48,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:10:48,257 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:10:48,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:10:48,260 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:10:48,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 22:10:48,264 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 22:10:48,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 22:10:48,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 22:10:48,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 22:10:48,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 22:10:48,267 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 22:10:48,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 22:10:48,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:10:48,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:10:48,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:10:48,270 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 [2019-11-06 22:10:48,283 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:10:48,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:10:48,285 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:10:48,285 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:10:48,285 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:10:48,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:10:48,286 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:10:48,286 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:10:48,286 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:10:48,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:10:48,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:10:48,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:10:48,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:10:48,287 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:10:48,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:10:48,287 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:10:48,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:10:48,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:10:48,288 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:10:48,288 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:10:48,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:10:48,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:10:48,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:10:48,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:10:48,289 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:10:48,289 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:10:48,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:10:48,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:10:48,290 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 22:10:48,573 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:10:48,583 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:10:48,587 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:10:48,588 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:10:48,589 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:10:48,589 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum40.i [2019-11-06 22:10:48,650 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76d189e32/82120ff6676c472cb5a8a7d405be3b4d/FLAGd2354a1b5 [2019-11-06 22:10:49,103 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:10:49,103 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum40.i [2019-11-06 22:10:49,109 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76d189e32/82120ff6676c472cb5a8a7d405be3b4d/FLAGd2354a1b5 [2019-11-06 22:10:49,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76d189e32/82120ff6676c472cb5a8a7d405be3b4d [2019-11-06 22:10:49,488 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:10:49,490 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:10:49,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:10:49,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:10:49,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:10:49,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:10:49" (1/1) ... [2019-11-06 22:10:49,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24198dd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:49, skipping insertion in model container [2019-11-06 22:10:49,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:10:49" (1/1) ... [2019-11-06 22:10:49,508 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:10:49,530 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:10:49,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:10:49,716 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:10:49,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:10:49,844 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:10:49,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:49 WrapperNode [2019-11-06 22:10:49,845 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:10:49,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:10:49,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:10:49,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:10:49,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:49" (1/1) ... [2019-11-06 22:10:49,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:49" (1/1) ... [2019-11-06 22:10:49,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:49" (1/1) ... [2019-11-06 22:10:49,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:49" (1/1) ... [2019-11-06 22:10:49,874 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:49" (1/1) ... [2019-11-06 22:10:49,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:49" (1/1) ... [2019-11-06 22:10:49,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:49" (1/1) ... [2019-11-06 22:10:49,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:10:49,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:10:49,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:10:49,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:10:49,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:49" (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 [2019-11-06 22:10:49,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:10:49,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:10:49,943 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2019-11-06 22:10:49,943 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2019-11-06 22:10:49,944 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:10:49,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:10:49,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:10:49,944 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2019-11-06 22:10:49,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 22:10:49,944 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2019-11-06 22:10:49,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 22:10:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:10:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 22:10:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 22:10:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:10:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:10:50,271 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:10:50,271 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 22:10:50,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:10:50 BoogieIcfgContainer [2019-11-06 22:10:50,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:10:50,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:10:50,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:10:50,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:10:50,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:10:49" (1/3) ... [2019-11-06 22:10:50,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5383ca6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:10:50, skipping insertion in model container [2019-11-06 22:10:50,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:49" (2/3) ... [2019-11-06 22:10:50,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5383ca6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:10:50, skipping insertion in model container [2019-11-06 22:10:50,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:10:50" (3/3) ... [2019-11-06 22:10:50,283 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum40.i [2019-11-06 22:10:50,301 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:10:50,306 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:10:50,317 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:10:50,341 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:10:50,341 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:10:50,341 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:10:50,341 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:10:50,342 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:10:50,342 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:10:50,342 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:10:50,342 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:10:50,360 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2019-11-06 22:10:50,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 22:10:50,366 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:50,367 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:50,369 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:50,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:50,373 INFO L82 PathProgramCache]: Analyzing trace with hash -332770493, now seen corresponding path program 1 times [2019-11-06 22:10:50,379 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:50,380 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939514453] [2019-11-06 22:10:50,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:50,503 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939514453] [2019-11-06 22:10:50,504 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2019-11-06 22:10:50,505 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845046020] [2019-11-06 22:10:50,505 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 [2019-11-06 22:10:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:50,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-06 22:10:50,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-06 22:10:50,673 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:10:50,673 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-06 22:10:50,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266739738] [2019-11-06 22:10:50,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-06 22:10:50,684 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:50,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-06 22:10:50,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 22:10:50,706 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2019-11-06 22:10:50,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:50,755 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2019-11-06 22:10:50,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-06 22:10:50,758 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2019-11-06 22:10:50,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:50,775 INFO L225 Difference]: With dead ends: 64 [2019-11-06 22:10:50,777 INFO L226 Difference]: Without dead ends: 32 [2019-11-06 22:10:50,790 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 22:10:50,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-06 22:10:50,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-06 22:10:50,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 22:10:50,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-11-06 22:10:50,845 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 37 [2019-11-06 22:10:50,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:50,846 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-11-06 22:10:50,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-06 22:10:50,847 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-11-06 22:10:50,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 22:10:50,852 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:50,852 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:51,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:51,057 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:51,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:51,058 INFO L82 PathProgramCache]: Analyzing trace with hash -991975144, now seen corresponding path program 1 times [2019-11-06 22:10:51,059 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:51,059 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885886969] [2019-11-06 22:10:51,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:51,101 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:10:51,101 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113528944] [2019-11-06 22:10:51,101 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 [2019-11-06 22:10:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:51,196 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:10:51,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 22:10:51,248 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885886969] [2019-11-06 22:10:51,248 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:10:51,248 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113528944] [2019-11-06 22:10:51,249 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:10:51,249 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:10:51,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698495187] [2019-11-06 22:10:51,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:10:51,251 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:51,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:10:51,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:10:51,252 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 3 states. [2019-11-06 22:10:51,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:51,280 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2019-11-06 22:10:51,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:10:51,281 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2019-11-06 22:10:51,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:51,284 INFO L225 Difference]: With dead ends: 56 [2019-11-06 22:10:51,284 INFO L226 Difference]: Without dead ends: 34 [2019-11-06 22:10:51,285 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:10:51,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-06 22:10:51,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-11-06 22:10:51,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 22:10:51,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-11-06 22:10:51,299 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 37 [2019-11-06 22:10:51,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:51,299 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-11-06 22:10:51,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:10:51,299 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-11-06 22:10:51,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-06 22:10:51,303 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:51,303 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:51,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:51,504 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:51,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:51,506 INFO L82 PathProgramCache]: Analyzing trace with hash 479004822, now seen corresponding path program 1 times [2019-11-06 22:10:51,506 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:51,507 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722164724] [2019-11-06 22:10:51,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:51,541 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:10:51,542 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775001810] [2019-11-06 22:10:51,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 22:10:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:51,619 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:10:51,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:10:51,633 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722164724] [2019-11-06 22:10:51,633 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:10:51,634 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775001810] [2019-11-06 22:10:51,634 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:10:51,634 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:10:51,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242965492] [2019-11-06 22:10:51,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:10:51,635 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:51,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:10:51,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:10:51,636 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 3 states. [2019-11-06 22:10:52,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:52,084 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2019-11-06 22:10:52,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:10:52,085 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2019-11-06 22:10:52,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:52,088 INFO L225 Difference]: With dead ends: 57 [2019-11-06 22:10:52,088 INFO L226 Difference]: Without dead ends: 39 [2019-11-06 22:10:52,089 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:10:52,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-06 22:10:52,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-11-06 22:10:52,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-06 22:10:52,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2019-11-06 22:10:52,107 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 39 [2019-11-06 22:10:52,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:52,108 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2019-11-06 22:10:52,108 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:10:52,108 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2019-11-06 22:10:52,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-06 22:10:52,109 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:52,110 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:52,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:52,314 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:52,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:52,315 INFO L82 PathProgramCache]: Analyzing trace with hash -22870507, now seen corresponding path program 1 times [2019-11-06 22:10:52,315 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:52,316 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398864747] [2019-11-06 22:10:52,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:52,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:52,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:52,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 22:10:52,463 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398864747] [2019-11-06 22:10:52,464 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890639915] [2019-11-06 22:10:52,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:52,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:52,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:10:52,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 22:10:52,531 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:10:52,531 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-11-06 22:10:52,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098744575] [2019-11-06 22:10:52,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:10:52,533 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:52,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:10:52,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:10:52,533 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 3 states. [2019-11-06 22:10:52,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:52,552 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2019-11-06 22:10:52,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:10:52,553 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2019-11-06 22:10:52,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:52,554 INFO L225 Difference]: With dead ends: 62 [2019-11-06 22:10:52,554 INFO L226 Difference]: Without dead ends: 40 [2019-11-06 22:10:52,555 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:10:52,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-06 22:10:52,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-11-06 22:10:52,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 22:10:52,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2019-11-06 22:10:52,562 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 39 [2019-11-06 22:10:52,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:52,562 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2019-11-06 22:10:52,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:10:52,563 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2019-11-06 22:10:52,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-06 22:10:52,564 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:52,564 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:52,772 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:52,773 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:52,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:52,774 INFO L82 PathProgramCache]: Analyzing trace with hash 496221539, now seen corresponding path program 1 times [2019-11-06 22:10:52,774 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:52,774 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663250258] [2019-11-06 22:10:52,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:52,915 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 22:10:52,915 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663250258] [2019-11-06 22:10:52,915 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388853229] [2019-11-06 22:10:52,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 22:10:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:52,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:10:52,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 22:10:52,991 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:10:52,992 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 22:10:52,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329479043] [2019-11-06 22:10:52,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:10:52,993 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:52,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:10:52,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:10:52,993 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 3 states. [2019-11-06 22:10:53,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:53,014 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2019-11-06 22:10:53,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:10:53,018 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2019-11-06 22:10:53,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:53,020 INFO L225 Difference]: With dead ends: 60 [2019-11-06 22:10:53,020 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 22:10:53,020 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:10:53,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 22:10:53,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-11-06 22:10:53,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 22:10:53,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2019-11-06 22:10:53,033 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 48 [2019-11-06 22:10:53,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:53,033 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2019-11-06 22:10:53,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:10:53,034 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2019-11-06 22:10:53,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 22:10:53,035 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:53,035 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:53,238 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:53,239 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:53,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:53,240 INFO L82 PathProgramCache]: Analyzing trace with hash 125205893, now seen corresponding path program 1 times [2019-11-06 22:10:53,240 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:53,241 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890262050] [2019-11-06 22:10:53,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 22:10:53,348 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890262050] [2019-11-06 22:10:53,348 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993492137] [2019-11-06 22:10:53,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 22:10:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:53,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:10:53,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 22:10:53,457 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:53,458 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-06 22:10:53,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675263351] [2019-11-06 22:10:53,462 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 22:10:53,462 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:53,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 22:10:53,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:10:53,463 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 8 states. [2019-11-06 22:10:53,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:53,729 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2019-11-06 22:10:53,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 22:10:53,733 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2019-11-06 22:10:53,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:53,734 INFO L225 Difference]: With dead ends: 76 [2019-11-06 22:10:53,734 INFO L226 Difference]: Without dead ends: 47 [2019-11-06 22:10:53,736 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:10:53,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-06 22:10:53,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-11-06 22:10:53,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-06 22:10:53,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2019-11-06 22:10:53,743 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 50 [2019-11-06 22:10:53,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:53,744 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2019-11-06 22:10:53,744 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 22:10:53,744 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2019-11-06 22:10:53,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-06 22:10:53,745 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:53,746 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:53,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:53,950 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:53,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:53,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1369912335, now seen corresponding path program 2 times [2019-11-06 22:10:53,951 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:53,951 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386064043] [2019-11-06 22:10:53,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:53,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:54,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:54,049 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 22:10:54,050 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386064043] [2019-11-06 22:10:54,050 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349329928] [2019-11-06 22:10:54,050 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 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 [2019-11-06 22:10:54,103 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:10:54,103 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:54,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:10:54,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-11-06 22:10:54,160 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:10:54,160 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2019-11-06 22:10:54,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332004717] [2019-11-06 22:10:54,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 22:10:54,161 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:54,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 22:10:54,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:10:54,162 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 9 states. [2019-11-06 22:10:54,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:54,457 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2019-11-06 22:10:54,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 22:10:54,457 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2019-11-06 22:10:54,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:54,458 INFO L225 Difference]: With dead ends: 83 [2019-11-06 22:10:54,458 INFO L226 Difference]: Without dead ends: 51 [2019-11-06 22:10:54,459 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-11-06 22:10:54,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-06 22:10:54,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2019-11-06 22:10:54,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-06 22:10:54,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2019-11-06 22:10:54,472 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 61 [2019-11-06 22:10:54,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:54,472 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2019-11-06 22:10:54,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 22:10:54,473 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2019-11-06 22:10:54,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-06 22:10:54,479 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:54,479 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:54,679 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:54,680 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:54,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:54,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1896448358, now seen corresponding path program 1 times [2019-11-06 22:10:54,681 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:54,681 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591693526] [2019-11-06 22:10:54,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:54,699 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:10:54,699 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940307033] [2019-11-06 22:10:54,699 INFO L94 rtionOrderModulation]: Keeping assertion order 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 [2019-11-06 22:10:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:54,781 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 22:10:54,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:54,823 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2019-11-06 22:10:54,823 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591693526] [2019-11-06 22:10:54,823 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:10:54,824 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940307033] [2019-11-06 22:10:54,824 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:10:54,824 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-06 22:10:54,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509659170] [2019-11-06 22:10:54,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:10:54,825 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:54,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:10:54,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:10:54,826 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 6 states. [2019-11-06 22:10:54,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:54,851 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2019-11-06 22:10:54,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:10:54,854 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2019-11-06 22:10:54,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:54,855 INFO L225 Difference]: With dead ends: 78 [2019-11-06 22:10:54,855 INFO L226 Difference]: Without dead ends: 48 [2019-11-06 22:10:54,856 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:10:54,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-06 22:10:54,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2019-11-06 22:10:54,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-06 22:10:54,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2019-11-06 22:10:54,869 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 72 [2019-11-06 22:10:54,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:54,869 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2019-11-06 22:10:54,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:10:54,869 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2019-11-06 22:10:54,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-06 22:10:54,870 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:54,871 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:55,071 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:55,072 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:55,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:55,073 INFO L82 PathProgramCache]: Analyzing trace with hash 2135261480, now seen corresponding path program 2 times [2019-11-06 22:10:55,073 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:55,073 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568997114] [2019-11-06 22:10:55,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:55,088 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:10:55,088 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1906030110] [2019-11-06 22:10:55,088 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 [2019-11-06 22:10:55,149 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:10:55,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:55,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:10:55,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:55,195 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2019-11-06 22:10:55,195 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568997114] [2019-11-06 22:10:55,195 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:10:55,195 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906030110] [2019-11-06 22:10:55,196 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:10:55,196 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-06 22:10:55,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881682275] [2019-11-06 22:10:55,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:10:55,197 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:55,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:10:55,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:10:55,197 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 7 states. [2019-11-06 22:10:55,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:55,223 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2019-11-06 22:10:55,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:10:55,223 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 74 [2019-11-06 22:10:55,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:55,224 INFO L225 Difference]: With dead ends: 80 [2019-11-06 22:10:55,224 INFO L226 Difference]: Without dead ends: 50 [2019-11-06 22:10:55,225 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:10:55,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-06 22:10:55,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-11-06 22:10:55,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 22:10:55,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2019-11-06 22:10:55,231 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 74 [2019-11-06 22:10:55,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:55,231 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2019-11-06 22:10:55,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:10:55,232 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2019-11-06 22:10:55,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-06 22:10:55,233 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:55,233 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 6, 5, 5, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:55,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:55,436 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:55,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:55,437 INFO L82 PathProgramCache]: Analyzing trace with hash -293562262, now seen corresponding path program 3 times [2019-11-06 22:10:55,437 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:55,438 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393613663] [2019-11-06 22:10:55,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:55,450 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:10:55,451 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300105309] [2019-11-06 22:10:55,451 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 [2019-11-06 22:10:55,515 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 22:10:55,515 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:55,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 22:10:55,518 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:55,552 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2019-11-06 22:10:55,553 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393613663] [2019-11-06 22:10:55,553 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:10:55,553 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300105309] [2019-11-06 22:10:55,553 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:10:55,553 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-06 22:10:55,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623617777] [2019-11-06 22:10:55,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:10:55,554 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:55,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:10:55,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:10:55,555 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 4 states. [2019-11-06 22:10:55,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:55,572 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2019-11-06 22:10:55,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:10:55,572 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2019-11-06 22:10:55,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:55,573 INFO L225 Difference]: With dead ends: 72 [2019-11-06 22:10:55,573 INFO L226 Difference]: Without dead ends: 52 [2019-11-06 22:10:55,574 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:10:55,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-06 22:10:55,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-11-06 22:10:55,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 22:10:55,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2019-11-06 22:10:55,580 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 76 [2019-11-06 22:10:55,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:55,580 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2019-11-06 22:10:55,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:10:55,581 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2019-11-06 22:10:55,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-06 22:10:55,582 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:55,582 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 6, 5, 5, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:55,789 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:55,790 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:55,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:55,791 INFO L82 PathProgramCache]: Analyzing trace with hash 704023820, now seen corresponding path program 4 times [2019-11-06 22:10:55,791 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:55,792 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726543540] [2019-11-06 22:10:55,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:55,803 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:10:55,804 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487893850] [2019-11-06 22:10:55,804 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 [2019-11-06 22:10:55,874 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:10:55,874 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:55,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:10:55,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:55,908 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 79 proven. 7 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-11-06 22:10:55,909 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726543540] [2019-11-06 22:10:55,909 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:10:55,909 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487893850] [2019-11-06 22:10:55,909 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:10:55,910 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-06 22:10:55,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954155686] [2019-11-06 22:10:55,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:10:55,911 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:55,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:10:55,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:10:55,911 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 5 states. [2019-11-06 22:10:55,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:55,933 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2019-11-06 22:10:55,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:10:55,933 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2019-11-06 22:10:55,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:55,934 INFO L225 Difference]: With dead ends: 83 [2019-11-06 22:10:55,934 INFO L226 Difference]: Without dead ends: 55 [2019-11-06 22:10:55,935 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:10:55,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-06 22:10:55,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-11-06 22:10:55,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-06 22:10:55,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2019-11-06 22:10:55,941 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 78 [2019-11-06 22:10:55,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:55,941 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2019-11-06 22:10:55,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:10:55,942 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2019-11-06 22:10:55,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-06 22:10:55,943 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:55,943 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 9, 5, 5, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:56,154 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:56,155 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:56,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:56,155 INFO L82 PathProgramCache]: Analyzing trace with hash -40278520, now seen corresponding path program 5 times [2019-11-06 22:10:56,155 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:56,156 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261113084] [2019-11-06 22:10:56,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:56,170 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:10:56,170 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [956336757] [2019-11-06 22:10:56,171 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 [2019-11-06 22:10:56,205 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:10:56,206 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:56,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:10:56,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-06 22:10:56,244 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261113084] [2019-11-06 22:10:56,244 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:10:56,245 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956336757] [2019-11-06 22:10:56,245 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:10:56,245 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-06 22:10:56,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82189748] [2019-11-06 22:10:56,249 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:10:56,249 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:56,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:10:56,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:10:56,250 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 5 states. [2019-11-06 22:10:56,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:56,281 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2019-11-06 22:10:56,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:10:56,282 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 87 [2019-11-06 22:10:56,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:56,284 INFO L225 Difference]: With dead ends: 90 [2019-11-06 22:10:56,284 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 22:10:56,285 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:10:56,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 22:10:56,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-11-06 22:10:56,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 22:10:56,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2019-11-06 22:10:56,292 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 87 [2019-11-06 22:10:56,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:56,293 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2019-11-06 22:10:56,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:10:56,293 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2019-11-06 22:10:56,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-06 22:10:56,294 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:56,294 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:56,497 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:56,498 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:56,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:56,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1679580114, now seen corresponding path program 6 times [2019-11-06 22:10:56,499 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:56,499 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492059222] [2019-11-06 22:10:56,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:56,511 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:10:56,511 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109801357] [2019-11-06 22:10:56,511 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 [2019-11-06 22:10:56,613 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-06 22:10:56,613 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:56,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 22:10:56,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:56,644 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 195 proven. 7 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2019-11-06 22:10:56,645 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492059222] [2019-11-06 22:10:56,645 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:10:56,645 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109801357] [2019-11-06 22:10:56,646 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:10:56,646 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-06 22:10:56,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626577698] [2019-11-06 22:10:56,647 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:10:56,647 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:56,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:10:56,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:10:56,647 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 6 states. [2019-11-06 22:10:56,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:56,690 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2019-11-06 22:10:56,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:10:56,693 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 96 [2019-11-06 22:10:56,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:56,694 INFO L225 Difference]: With dead ends: 96 [2019-11-06 22:10:56,694 INFO L226 Difference]: Without dead ends: 62 [2019-11-06 22:10:56,695 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:10:56,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-06 22:10:56,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2019-11-06 22:10:56,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-06 22:10:56,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2019-11-06 22:10:56,701 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 96 [2019-11-06 22:10:56,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:56,701 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2019-11-06 22:10:56,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:10:56,701 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2019-11-06 22:10:56,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-06 22:10:56,702 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:56,703 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:56,906 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:56,906 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:56,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:56,907 INFO L82 PathProgramCache]: Analyzing trace with hash -726581688, now seen corresponding path program 7 times [2019-11-06 22:10:56,907 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:56,907 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676169483] [2019-11-06 22:10:56,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:56,925 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:10:56,925 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609902766] [2019-11-06 22:10:56,925 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 [2019-11-06 22:10:57,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:57,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:10:57,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:57,056 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-11-06 22:10:57,056 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676169483] [2019-11-06 22:10:57,056 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:10:57,057 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609902766] [2019-11-06 22:10:57,057 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:10:57,057 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-06 22:10:57,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847458579] [2019-11-06 22:10:57,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 22:10:57,058 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:57,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 22:10:57,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:10:57,059 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 8 states. [2019-11-06 22:10:57,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:57,087 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2019-11-06 22:10:57,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:10:57,087 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 105 [2019-11-06 22:10:57,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:57,088 INFO L225 Difference]: With dead ends: 104 [2019-11-06 22:10:57,089 INFO L226 Difference]: Without dead ends: 63 [2019-11-06 22:10:57,089 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:10:57,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-06 22:10:57,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2019-11-06 22:10:57,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-06 22:10:57,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2019-11-06 22:10:57,102 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 105 [2019-11-06 22:10:57,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:57,102 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2019-11-06 22:10:57,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 22:10:57,103 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2019-11-06 22:10:57,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-06 22:10:57,104 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:57,106 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:57,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:57,310 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:57,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:57,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1337737530, now seen corresponding path program 8 times [2019-11-06 22:10:57,311 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:57,311 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130699549] [2019-11-06 22:10:57,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:57,322 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:10:57,323 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526698737] [2019-11-06 22:10:57,323 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 [2019-11-06 22:10:57,394 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:10:57,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:57,396 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 22:10:57,398 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:57,474 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-11-06 22:10:57,475 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130699549] [2019-11-06 22:10:57,475 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:10:57,475 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526698737] [2019-11-06 22:10:57,475 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:10:57,475 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 22:10:57,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649564373] [2019-11-06 22:10:57,476 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 22:10:57,476 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:57,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 22:10:57,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:10:57,477 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 9 states. [2019-11-06 22:10:57,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:57,518 INFO L93 Difference]: Finished difference Result 106 states and 122 transitions. [2019-11-06 22:10:57,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:10:57,519 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 107 [2019-11-06 22:10:57,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:57,520 INFO L225 Difference]: With dead ends: 106 [2019-11-06 22:10:57,520 INFO L226 Difference]: Without dead ends: 65 [2019-11-06 22:10:57,520 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:10:57,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-06 22:10:57,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-06 22:10:57,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-06 22:10:57,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2019-11-06 22:10:57,526 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 107 [2019-11-06 22:10:57,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:57,526 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2019-11-06 22:10:57,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 22:10:57,526 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2019-11-06 22:10:57,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-06 22:10:57,527 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:57,528 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:57,739 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:57,740 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:57,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:57,740 INFO L82 PathProgramCache]: Analyzing trace with hash -247982140, now seen corresponding path program 9 times [2019-11-06 22:10:57,741 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:57,741 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373333686] [2019-11-06 22:10:57,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:57,754 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:10:57,754 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526109689] [2019-11-06 22:10:57,754 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 [2019-11-06 22:10:57,954 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 22:10:57,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:57,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:10:57,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:57,975 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 250 proven. 4 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2019-11-06 22:10:57,976 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373333686] [2019-11-06 22:10:57,976 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:10:57,976 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526109689] [2019-11-06 22:10:57,976 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:10:57,976 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-06 22:10:57,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164216130] [2019-11-06 22:10:57,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:10:57,977 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:57,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:10:57,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:10:57,977 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 5 states. [2019-11-06 22:10:58,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:58,000 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2019-11-06 22:10:58,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:10:58,001 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 109 [2019-11-06 22:10:58,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:58,001 INFO L225 Difference]: With dead ends: 96 [2019-11-06 22:10:58,001 INFO L226 Difference]: Without dead ends: 67 [2019-11-06 22:10:58,002 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:10:58,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-06 22:10:58,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-06 22:10:58,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-06 22:10:58,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2019-11-06 22:10:58,007 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 109 [2019-11-06 22:10:58,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:58,007 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2019-11-06 22:10:58,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:10:58,008 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2019-11-06 22:10:58,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-06 22:10:58,009 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:58,009 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 7, 7, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:58,220 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:58,220 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:58,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:58,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1544882658, now seen corresponding path program 10 times [2019-11-06 22:10:58,221 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:58,222 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348666508] [2019-11-06 22:10:58,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:58,232 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:10:58,233 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685709749] [2019-11-06 22:10:58,233 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 [2019-11-06 22:10:58,322 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:10:58,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:58,324 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 22:10:58,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2019-11-06 22:10:58,421 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348666508] [2019-11-06 22:10:58,421 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:10:58,421 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685709749] [2019-11-06 22:10:58,422 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:10:58,422 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 22:10:58,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149422965] [2019-11-06 22:10:58,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 22:10:58,423 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:58,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 22:10:58,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:10:58,423 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 10 states. [2019-11-06 22:10:58,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:58,463 INFO L93 Difference]: Finished difference Result 112 states and 128 transitions. [2019-11-06 22:10:58,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 22:10:58,463 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 111 [2019-11-06 22:10:58,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:58,464 INFO L225 Difference]: With dead ends: 112 [2019-11-06 22:10:58,464 INFO L226 Difference]: Without dead ends: 69 [2019-11-06 22:10:58,465 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:10:58,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-06 22:10:58,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-11-06 22:10:58,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-06 22:10:58,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2019-11-06 22:10:58,470 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 111 [2019-11-06 22:10:58,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:58,470 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2019-11-06 22:10:58,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 22:10:58,471 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2019-11-06 22:10:58,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-06 22:10:58,472 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:58,472 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 8, 8, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:58,675 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:58,675 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:58,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:58,676 INFO L82 PathProgramCache]: Analyzing trace with hash -384257056, now seen corresponding path program 11 times [2019-11-06 22:10:58,676 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:58,677 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686275378] [2019-11-06 22:10:58,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:58,688 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:10:58,689 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670549450] [2019-11-06 22:10:58,689 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 [2019-11-06 22:10:58,738 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-06 22:10:58,739 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:58,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:10:58,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 273 proven. 15 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2019-11-06 22:10:58,789 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686275378] [2019-11-06 22:10:58,790 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:10:58,790 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670549450] [2019-11-06 22:10:58,790 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:10:58,790 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-06 22:10:58,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438189839] [2019-11-06 22:10:58,791 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:10:58,792 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:58,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:10:58,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:10:58,792 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand 7 states. [2019-11-06 22:10:58,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:58,829 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2019-11-06 22:10:58,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:10:58,830 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 113 [2019-11-06 22:10:58,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:58,831 INFO L225 Difference]: With dead ends: 112 [2019-11-06 22:10:58,831 INFO L226 Difference]: Without dead ends: 73 [2019-11-06 22:10:58,832 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:10:58,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-06 22:10:58,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2019-11-06 22:10:58,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-06 22:10:58,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2019-11-06 22:10:58,837 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 113 [2019-11-06 22:10:58,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:58,837 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2019-11-06 22:10:58,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:10:58,838 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2019-11-06 22:10:58,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-06 22:10:58,839 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:58,839 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 8, 8, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:59,044 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:59,044 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:59,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:59,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1242518650, now seen corresponding path program 12 times [2019-11-06 22:10:59,045 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:59,046 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011287090] [2019-11-06 22:10:59,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:59,071 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:10:59,071 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642683281] [2019-11-06 22:10:59,071 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 [2019-11-06 22:10:59,248 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-06 22:10:59,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:10:59,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 22:10:59,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 332 proven. 9 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2019-11-06 22:10:59,295 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011287090] [2019-11-06 22:10:59,295 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:10:59,295 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642683281] [2019-11-06 22:10:59,295 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:10:59,296 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-06 22:10:59,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375650335] [2019-11-06 22:10:59,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:10:59,297 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:59,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:10:59,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:10:59,297 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand 6 states. [2019-11-06 22:10:59,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:59,317 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2019-11-06 22:10:59,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:10:59,318 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2019-11-06 22:10:59,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:59,319 INFO L225 Difference]: With dead ends: 106 [2019-11-06 22:10:59,319 INFO L226 Difference]: Without dead ends: 74 [2019-11-06 22:10:59,319 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:10:59,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-06 22:10:59,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-11-06 22:10:59,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-06 22:10:59,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2019-11-06 22:10:59,325 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 122 [2019-11-06 22:10:59,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:59,325 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2019-11-06 22:10:59,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:10:59,325 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2019-11-06 22:10:59,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-06 22:10:59,326 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:59,326 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 8, 8, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:59,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:59,536 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:59,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:59,537 INFO L82 PathProgramCache]: Analyzing trace with hash 815463068, now seen corresponding path program 13 times [2019-11-06 22:10:59,537 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:59,537 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242267720] [2019-11-06 22:10:59,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:10:59,549 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:10:59,549 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [295505658] [2019-11-06 22:10:59,549 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 [2019-11-06 22:10:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:10:59,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 22:10:59,635 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:10:59,724 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2019-11-06 22:10:59,725 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242267720] [2019-11-06 22:10:59,725 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:10:59,725 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295505658] [2019-11-06 22:10:59,725 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:10:59,726 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-06 22:10:59,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747558430] [2019-11-06 22:10:59,730 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 22:10:59,730 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:10:59,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 22:10:59,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:10:59,731 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand 11 states. [2019-11-06 22:10:59,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:10:59,777 INFO L93 Difference]: Finished difference Result 124 states and 142 transitions. [2019-11-06 22:10:59,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 22:10:59,778 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 124 [2019-11-06 22:10:59,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:10:59,778 INFO L225 Difference]: With dead ends: 124 [2019-11-06 22:10:59,778 INFO L226 Difference]: Without dead ends: 76 [2019-11-06 22:10:59,779 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:10:59,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-06 22:10:59,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-11-06 22:10:59,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-06 22:10:59,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2019-11-06 22:10:59,784 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 124 [2019-11-06 22:10:59,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:10:59,784 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2019-11-06 22:10:59,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 22:10:59,785 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2019-11-06 22:10:59,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-06 22:10:59,785 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:10:59,786 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 9, 9, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:10:59,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:10:59,995 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:10:59,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:10:59,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1533018786, now seen corresponding path program 14 times [2019-11-06 22:10:59,996 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:10:59,996 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327084048] [2019-11-06 22:10:59,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:00,008 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:11:00,008 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472776128] [2019-11-06 22:11:00,008 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 [2019-11-06 22:11:00,096 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:11:00,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:00,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 22:11:00,100 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2019-11-06 22:11:00,212 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327084048] [2019-11-06 22:11:00,213 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:11:00,213 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472776128] [2019-11-06 22:11:00,213 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:11:00,213 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-06 22:11:00,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611145270] [2019-11-06 22:11:00,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:11:00,214 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:00,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 22:11:00,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:11:00,215 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand 12 states. [2019-11-06 22:11:00,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:00,258 INFO L93 Difference]: Finished difference Result 126 states and 144 transitions. [2019-11-06 22:11:00,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:11:00,259 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2019-11-06 22:11:00,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:00,260 INFO L225 Difference]: With dead ends: 126 [2019-11-06 22:11:00,260 INFO L226 Difference]: Without dead ends: 78 [2019-11-06 22:11:00,260 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:11:00,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-06 22:11:00,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-11-06 22:11:00,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-06 22:11:00,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2019-11-06 22:11:00,265 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 126 [2019-11-06 22:11:00,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:00,266 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2019-11-06 22:11:00,266 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 22:11:00,266 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2019-11-06 22:11:00,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-06 22:11:00,267 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:00,267 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 12, 10, 10, 9, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:00,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:00,473 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:00,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:00,474 INFO L82 PathProgramCache]: Analyzing trace with hash 728717216, now seen corresponding path program 15 times [2019-11-06 22:11:00,474 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:00,474 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757253470] [2019-11-06 22:11:00,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:00,491 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:11:00,494 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006446417] [2019-11-06 22:11:00,494 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 [2019-11-06 22:11:00,695 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 22:11:00,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:00,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:11:00,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:00,737 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 332 proven. 16 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2019-11-06 22:11:00,737 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757253470] [2019-11-06 22:11:00,737 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:11:00,737 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006446417] [2019-11-06 22:11:00,738 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:11:00,738 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-06 22:11:00,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633768124] [2019-11-06 22:11:00,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:11:00,738 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:00,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:11:00,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:11:00,739 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 7 states. [2019-11-06 22:11:00,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:00,761 INFO L93 Difference]: Finished difference Result 112 states and 127 transitions. [2019-11-06 22:11:00,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:11:00,761 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 128 [2019-11-06 22:11:00,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:00,762 INFO L225 Difference]: With dead ends: 112 [2019-11-06 22:11:00,763 INFO L226 Difference]: Without dead ends: 80 [2019-11-06 22:11:00,763 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:11:00,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-06 22:11:00,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-11-06 22:11:00,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-06 22:11:00,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2019-11-06 22:11:00,769 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 128 [2019-11-06 22:11:00,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:00,769 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2019-11-06 22:11:00,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:11:00,769 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2019-11-06 22:11:00,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-06 22:11:00,770 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:00,770 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 12, 10, 10, 9, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:00,971 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:00,971 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:00,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:00,971 INFO L82 PathProgramCache]: Analyzing trace with hash 973524034, now seen corresponding path program 16 times [2019-11-06 22:11:00,972 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:00,972 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139139494] [2019-11-06 22:11:00,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:00,984 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:11:00,984 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1240722264] [2019-11-06 22:11:00,984 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 [2019-11-06 22:11:01,066 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:11:01,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:01,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 22:11:01,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:01,182 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2019-11-06 22:11:01,183 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139139494] [2019-11-06 22:11:01,183 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:11:01,183 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240722264] [2019-11-06 22:11:01,183 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:11:01,183 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-06 22:11:01,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895555608] [2019-11-06 22:11:01,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 22:11:01,184 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:01,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 22:11:01,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:11:01,185 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 13 states. [2019-11-06 22:11:01,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:01,228 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2019-11-06 22:11:01,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 22:11:01,229 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 130 [2019-11-06 22:11:01,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:01,230 INFO L225 Difference]: With dead ends: 132 [2019-11-06 22:11:01,230 INFO L226 Difference]: Without dead ends: 82 [2019-11-06 22:11:01,231 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:11:01,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-06 22:11:01,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2019-11-06 22:11:01,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-06 22:11:01,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2019-11-06 22:11:01,237 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 130 [2019-11-06 22:11:01,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:01,238 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2019-11-06 22:11:01,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 22:11:01,238 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2019-11-06 22:11:01,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 22:11:01,239 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:01,239 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 12, 11, 11, 9, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:01,443 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:01,443 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:01,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:01,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1187302012, now seen corresponding path program 17 times [2019-11-06 22:11:01,444 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:01,444 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804786272] [2019-11-06 22:11:01,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:01,472 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:11:01,473 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [514310847] [2019-11-06 22:11:01,473 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 [2019-11-06 22:11:01,601 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-06 22:11:01,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:01,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:11:01,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:01,650 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 363 proven. 26 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-11-06 22:11:01,650 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804786272] [2019-11-06 22:11:01,650 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:11:01,650 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514310847] [2019-11-06 22:11:01,650 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:11:01,651 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-06 22:11:01,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559455669] [2019-11-06 22:11:01,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 22:11:01,651 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:01,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 22:11:01,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:11:01,652 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 8 states. [2019-11-06 22:11:01,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:01,698 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2019-11-06 22:11:01,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:11:01,698 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 132 [2019-11-06 22:11:01,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:01,699 INFO L225 Difference]: With dead ends: 132 [2019-11-06 22:11:01,699 INFO L226 Difference]: Without dead ends: 86 [2019-11-06 22:11:01,700 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:11:01,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-06 22:11:01,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2019-11-06 22:11:01,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-06 22:11:01,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2019-11-06 22:11:01,705 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 132 [2019-11-06 22:11:01,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:01,705 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2019-11-06 22:11:01,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 22:11:01,706 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2019-11-06 22:11:01,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-06 22:11:01,707 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:01,707 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 15, 11, 11, 9, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:01,907 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:01,908 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:01,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:01,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1078049194, now seen corresponding path program 18 times [2019-11-06 22:11:01,909 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:01,909 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888944830] [2019-11-06 22:11:01,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:01,920 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:11:01,921 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557522953] [2019-11-06 22:11:01,921 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 [2019-11-06 22:11:03,834 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-06 22:11:03,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:03,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:11:03,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1061 backedges. 426 proven. 25 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2019-11-06 22:11:03,872 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888944830] [2019-11-06 22:11:03,872 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:11:03,873 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557522953] [2019-11-06 22:11:03,873 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:11:03,873 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-06 22:11:03,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657547738] [2019-11-06 22:11:03,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 22:11:03,874 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:03,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 22:11:03,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:11:03,874 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 8 states. [2019-11-06 22:11:03,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:03,903 INFO L93 Difference]: Finished difference Result 122 states and 139 transitions. [2019-11-06 22:11:03,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:11:03,903 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 141 [2019-11-06 22:11:03,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:03,904 INFO L225 Difference]: With dead ends: 122 [2019-11-06 22:11:03,905 INFO L226 Difference]: Without dead ends: 87 [2019-11-06 22:11:03,905 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:11:03,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-06 22:11:03,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-11-06 22:11:03,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-06 22:11:03,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2019-11-06 22:11:03,911 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 141 [2019-11-06 22:11:03,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:03,912 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2019-11-06 22:11:03,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 22:11:03,912 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2019-11-06 22:11:03,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-06 22:11:03,913 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:03,913 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 15, 11, 11, 9, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:04,117 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:04,118 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:04,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:04,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1446854004, now seen corresponding path program 19 times [2019-11-06 22:11:04,119 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:04,119 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601356739] [2019-11-06 22:11:04,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:04,132 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:11:04,132 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424195052] [2019-11-06 22:11:04,132 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 [2019-11-06 22:11:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:04,217 INFO L256 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 22:11:04,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:04,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 951 trivial. 0 not checked. [2019-11-06 22:11:04,317 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601356739] [2019-11-06 22:11:04,317 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:11:04,317 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424195052] [2019-11-06 22:11:04,317 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:11:04,317 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-06 22:11:04,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507144361] [2019-11-06 22:11:04,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 22:11:04,318 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:04,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 22:11:04,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:11:04,318 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand 14 states. [2019-11-06 22:11:04,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:04,381 INFO L93 Difference]: Finished difference Result 144 states and 164 transitions. [2019-11-06 22:11:04,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 22:11:04,384 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 143 [2019-11-06 22:11:04,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:04,385 INFO L225 Difference]: With dead ends: 144 [2019-11-06 22:11:04,385 INFO L226 Difference]: Without dead ends: 89 [2019-11-06 22:11:04,386 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:11:04,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-06 22:11:04,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-11-06 22:11:04,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-06 22:11:04,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2019-11-06 22:11:04,395 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 143 [2019-11-06 22:11:04,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:04,395 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2019-11-06 22:11:04,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 22:11:04,395 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2019-11-06 22:11:04,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-06 22:11:04,396 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:04,396 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 15, 12, 12, 9, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:04,600 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:04,600 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:04,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:04,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1583968114, now seen corresponding path program 20 times [2019-11-06 22:11:04,601 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:04,601 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438701121] [2019-11-06 22:11:04,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:04,613 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:11:04,613 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934146961] [2019-11-06 22:11:04,613 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 [2019-11-06 22:11:04,698 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:11:04,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:04,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-06 22:11:04,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 951 trivial. 0 not checked. [2019-11-06 22:11:04,820 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438701121] [2019-11-06 22:11:04,821 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:11:04,821 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934146961] [2019-11-06 22:11:04,821 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:11:04,821 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-11-06 22:11:04,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871288283] [2019-11-06 22:11:04,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 22:11:04,821 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:04,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 22:11:04,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-06 22:11:04,822 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand 15 states. [2019-11-06 22:11:04,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:04,873 INFO L93 Difference]: Finished difference Result 146 states and 166 transitions. [2019-11-06 22:11:04,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 22:11:04,874 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 145 [2019-11-06 22:11:04,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:04,875 INFO L225 Difference]: With dead ends: 146 [2019-11-06 22:11:04,875 INFO L226 Difference]: Without dead ends: 91 [2019-11-06 22:11:04,876 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-06 22:11:04,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-06 22:11:04,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2019-11-06 22:11:04,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-06 22:11:04,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2019-11-06 22:11:04,881 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 145 [2019-11-06 22:11:04,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:04,881 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2019-11-06 22:11:04,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 22:11:04,881 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2019-11-06 22:11:04,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-06 22:11:04,882 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:04,882 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 15, 13, 13, 9, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:05,086 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:05,086 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:05,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:05,086 INFO L82 PathProgramCache]: Analyzing trace with hash 206641648, now seen corresponding path program 21 times [2019-11-06 22:11:05,087 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:05,087 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255981043] [2019-11-06 22:11:05,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:05,102 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:11:05,102 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349940065] [2019-11-06 22:11:05,102 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 [2019-11-06 22:11:09,123 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-06 22:11:09,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:09,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 22:11:09,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:09,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1120 backedges. 426 proven. 36 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2019-11-06 22:11:09,192 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255981043] [2019-11-06 22:11:09,192 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:11:09,192 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349940065] [2019-11-06 22:11:09,192 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:11:09,192 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 22:11:09,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455995818] [2019-11-06 22:11:09,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 22:11:09,193 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:09,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 22:11:09,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:11:09,193 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand 9 states. [2019-11-06 22:11:09,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:09,234 INFO L93 Difference]: Finished difference Result 128 states and 145 transitions. [2019-11-06 22:11:09,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:11:09,235 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 147 [2019-11-06 22:11:09,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:09,236 INFO L225 Difference]: With dead ends: 128 [2019-11-06 22:11:09,237 INFO L226 Difference]: Without dead ends: 93 [2019-11-06 22:11:09,237 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:11:09,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-06 22:11:09,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2019-11-06 22:11:09,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-06 22:11:09,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2019-11-06 22:11:09,243 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 147 [2019-11-06 22:11:09,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:09,243 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2019-11-06 22:11:09,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 22:11:09,243 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2019-11-06 22:11:09,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-06 22:11:09,244 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:09,244 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 15, 13, 13, 9, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:09,448 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:09,448 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:09,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:09,449 INFO L82 PathProgramCache]: Analyzing trace with hash -915828082, now seen corresponding path program 22 times [2019-11-06 22:11:09,449 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:09,450 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292839390] [2019-11-06 22:11:09,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:09,462 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:11:09,462 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [236238265] [2019-11-06 22:11:09,462 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 [2019-11-06 22:11:09,547 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:11:09,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:09,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:11:09,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 475 proven. 26 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2019-11-06 22:11:09,603 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292839390] [2019-11-06 22:11:09,603 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:11:09,603 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236238265] [2019-11-06 22:11:09,603 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:11:09,604 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-06 22:11:09,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956901697] [2019-11-06 22:11:09,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:11:09,604 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:09,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:11:09,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:11:09,605 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand 7 states. [2019-11-06 22:11:09,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:09,635 INFO L93 Difference]: Finished difference Result 152 states and 175 transitions. [2019-11-06 22:11:09,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:11:09,636 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 149 [2019-11-06 22:11:09,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:09,637 INFO L225 Difference]: With dead ends: 152 [2019-11-06 22:11:09,637 INFO L226 Difference]: Without dead ends: 99 [2019-11-06 22:11:09,638 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:11:09,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-06 22:11:09,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2019-11-06 22:11:09,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-06 22:11:09,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2019-11-06 22:11:09,643 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 149 [2019-11-06 22:11:09,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:09,643 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2019-11-06 22:11:09,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:11:09,643 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2019-11-06 22:11:09,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-11-06 22:11:09,644 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:09,644 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 15, 15, 13, 13, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:09,847 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:09,848 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:09,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:09,848 INFO L82 PathProgramCache]: Analyzing trace with hash 35134862, now seen corresponding path program 23 times [2019-11-06 22:11:09,849 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:09,849 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293984782] [2019-11-06 22:11:09,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:09,861 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:11:09,861 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101706754] [2019-11-06 22:11:09,862 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 [2019-11-06 22:11:09,929 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-06 22:11:09,929 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:09,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 22:11:09,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:09,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1628 backedges. 723 proven. 40 refuted. 0 times theorem prover too weak. 865 trivial. 0 not checked. [2019-11-06 22:11:09,992 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293984782] [2019-11-06 22:11:09,993 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:11:09,993 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101706754] [2019-11-06 22:11:09,993 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:11:09,993 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 22:11:09,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061270366] [2019-11-06 22:11:09,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 22:11:09,994 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:09,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 22:11:09,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:11:09,994 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 9 states. [2019-11-06 22:11:10,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:10,039 INFO L93 Difference]: Finished difference Result 162 states and 186 transitions. [2019-11-06 22:11:10,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:11:10,040 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 167 [2019-11-06 22:11:10,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:10,041 INFO L225 Difference]: With dead ends: 162 [2019-11-06 22:11:10,041 INFO L226 Difference]: Without dead ends: 103 [2019-11-06 22:11:10,042 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:11:10,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-06 22:11:10,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2019-11-06 22:11:10,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-06 22:11:10,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2019-11-06 22:11:10,047 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 167 [2019-11-06 22:11:10,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:10,048 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2019-11-06 22:11:10,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 22:11:10,048 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2019-11-06 22:11:10,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-11-06 22:11:10,049 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:10,049 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 18, 15, 13, 13, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:10,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:10,253 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:10,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:10,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1395290612, now seen corresponding path program 24 times [2019-11-06 22:11:10,254 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:10,255 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354961786] [2019-11-06 22:11:10,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:10,266 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:11:10,266 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485757863] [2019-11-06 22:11:10,266 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 [2019-11-06 22:11:12,401 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-06 22:11:12,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:12,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 22:11:12,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1916 backedges. 780 proven. 49 refuted. 0 times theorem prover too weak. 1087 trivial. 0 not checked. [2019-11-06 22:11:12,480 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354961786] [2019-11-06 22:11:12,481 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:11:12,481 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485757863] [2019-11-06 22:11:12,481 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:11:12,481 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 22:11:12,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399899456] [2019-11-06 22:11:12,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 22:11:12,483 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:12,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 22:11:12,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:11:12,483 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand 10 states. [2019-11-06 22:11:12,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:12,513 INFO L93 Difference]: Finished difference Result 148 states and 167 transitions. [2019-11-06 22:11:12,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 22:11:12,513 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 176 [2019-11-06 22:11:12,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:12,514 INFO L225 Difference]: With dead ends: 148 [2019-11-06 22:11:12,515 INFO L226 Difference]: Without dead ends: 104 [2019-11-06 22:11:12,515 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:11:12,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-06 22:11:12,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2019-11-06 22:11:12,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-06 22:11:12,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2019-11-06 22:11:12,520 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 176 [2019-11-06 22:11:12,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:12,521 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2019-11-06 22:11:12,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 22:11:12,521 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2019-11-06 22:11:12,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-06 22:11:12,522 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:12,522 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 18, 15, 13, 13, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:12,724 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:12,724 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:12,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:12,725 INFO L82 PathProgramCache]: Analyzing trace with hash -533347154, now seen corresponding path program 25 times [2019-11-06 22:11:12,725 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:12,725 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885339639] [2019-11-06 22:11:12,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:12,739 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:11:12,740 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832039287] [2019-11-06 22:11:12,740 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 [2019-11-06 22:11:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:11:12,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 22:11:12,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1931 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1762 trivial. 0 not checked. [2019-11-06 22:11:13,004 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885339639] [2019-11-06 22:11:13,004 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:11:13,004 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832039287] [2019-11-06 22:11:13,004 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:11:13,005 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-11-06 22:11:13,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042409799] [2019-11-06 22:11:13,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 22:11:13,005 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:13,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 22:11:13,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-06 22:11:13,006 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand 16 states. [2019-11-06 22:11:13,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:13,057 INFO L93 Difference]: Finished difference Result 174 states and 196 transitions. [2019-11-06 22:11:13,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 22:11:13,058 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 178 [2019-11-06 22:11:13,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:13,059 INFO L225 Difference]: With dead ends: 174 [2019-11-06 22:11:13,059 INFO L226 Difference]: Without dead ends: 106 [2019-11-06 22:11:13,060 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-06 22:11:13,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-06 22:11:13,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2019-11-06 22:11:13,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-06 22:11:13,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2019-11-06 22:11:13,065 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 178 [2019-11-06 22:11:13,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:13,065 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2019-11-06 22:11:13,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 22:11:13,065 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2019-11-06 22:11:13,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-11-06 22:11:13,066 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:13,067 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 18, 15, 14, 14, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:13,270 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:13,270 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:13,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:13,271 INFO L82 PathProgramCache]: Analyzing trace with hash -116530704, now seen corresponding path program 26 times [2019-11-06 22:11:13,272 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:13,272 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691877991] [2019-11-06 22:11:13,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:13,283 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:11:13,283 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883502251] [2019-11-06 22:11:13,283 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 [2019-11-06 22:11:13,399 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 22:11:13,400 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:13,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 22:11:13,406 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1958 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1762 trivial. 0 not checked. [2019-11-06 22:11:13,623 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691877991] [2019-11-06 22:11:13,623 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:11:13,623 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883502251] [2019-11-06 22:11:13,624 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:11:13,624 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-11-06 22:11:13,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648678070] [2019-11-06 22:11:13,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 22:11:13,625 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:13,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 22:11:13,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-06 22:11:13,625 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand 17 states. [2019-11-06 22:11:13,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:13,694 INFO L93 Difference]: Finished difference Result 176 states and 198 transitions. [2019-11-06 22:11:13,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 22:11:13,695 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 180 [2019-11-06 22:11:13,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:13,696 INFO L225 Difference]: With dead ends: 176 [2019-11-06 22:11:13,696 INFO L226 Difference]: Without dead ends: 108 [2019-11-06 22:11:13,697 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-06 22:11:13,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-11-06 22:11:13,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-11-06 22:11:13,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-06 22:11:13,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2019-11-06 22:11:13,704 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 180 [2019-11-06 22:11:13,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:13,705 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2019-11-06 22:11:13,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 22:11:13,705 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2019-11-06 22:11:13,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-11-06 22:11:13,707 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:13,707 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 18, 15, 15, 15, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:13,911 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:13,911 INFO L410 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:13,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:13,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1012119218, now seen corresponding path program 27 times [2019-11-06 22:11:13,912 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:13,912 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542709640] [2019-11-06 22:11:13,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:13,925 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:11:13,925 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441422872] [2019-11-06 22:11:13,925 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 [2019-11-06 22:11:14,276 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-06 22:11:14,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:14,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 22:11:14,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1987 backedges. 780 proven. 64 refuted. 0 times theorem prover too weak. 1143 trivial. 0 not checked. [2019-11-06 22:11:14,401 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542709640] [2019-11-06 22:11:14,401 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:11:14,401 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441422872] [2019-11-06 22:11:14,401 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:11:14,401 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-06 22:11:14,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67631872] [2019-11-06 22:11:14,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 22:11:14,402 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:14,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 22:11:14,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:11:14,403 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand 11 states. [2019-11-06 22:11:14,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:14,434 INFO L93 Difference]: Finished difference Result 154 states and 173 transitions. [2019-11-06 22:11:14,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 22:11:14,435 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 182 [2019-11-06 22:11:14,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:14,436 INFO L225 Difference]: With dead ends: 154 [2019-11-06 22:11:14,436 INFO L226 Difference]: Without dead ends: 110 [2019-11-06 22:11:14,437 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:11:14,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-06 22:11:14,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-11-06 22:11:14,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-06 22:11:14,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2019-11-06 22:11:14,442 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 182 [2019-11-06 22:11:14,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:14,442 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2019-11-06 22:11:14,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 22:11:14,443 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2019-11-06 22:11:14,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-11-06 22:11:14,444 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:14,444 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 18, 15, 15, 15, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:14,648 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:14,648 INFO L410 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:14,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:14,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1999873068, now seen corresponding path program 28 times [2019-11-06 22:11:14,649 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:14,650 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114388145] [2019-11-06 22:11:14,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:14,663 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:11:14,663 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907349198] [2019-11-06 22:11:14,663 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 [2019-11-06 22:11:14,765 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 22:11:14,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:14,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:11:14,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:14,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 874 proven. 40 refuted. 0 times theorem prover too weak. 1090 trivial. 0 not checked. [2019-11-06 22:11:14,826 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114388145] [2019-11-06 22:11:14,826 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:11:14,827 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907349198] [2019-11-06 22:11:14,827 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:11:14,827 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-06 22:11:14,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681467944] [2019-11-06 22:11:14,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 22:11:14,828 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:14,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 22:11:14,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:11:14,828 INFO L87 Difference]: Start difference. First operand 109 states and 120 transitions. Second operand 8 states. [2019-11-06 22:11:14,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:14,858 INFO L93 Difference]: Finished difference Result 179 states and 203 transitions. [2019-11-06 22:11:14,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:11:14,859 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 184 [2019-11-06 22:11:14,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:14,860 INFO L225 Difference]: With dead ends: 179 [2019-11-06 22:11:14,860 INFO L226 Difference]: Without dead ends: 113 [2019-11-06 22:11:14,863 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:11:14,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-11-06 22:11:14,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2019-11-06 22:11:14,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-06 22:11:14,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 123 transitions. [2019-11-06 22:11:14,868 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 123 transitions. Word has length 184 [2019-11-06 22:11:14,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:14,869 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 123 transitions. [2019-11-06 22:11:14,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 22:11:14,869 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 123 transitions. [2019-11-06 22:11:14,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-11-06 22:11:14,870 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:14,870 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 18, 18, 15, 15, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:15,071 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:15,071 INFO L410 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:15,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:15,072 INFO L82 PathProgramCache]: Analyzing trace with hash 627078216, now seen corresponding path program 29 times [2019-11-06 22:11:15,072 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:15,072 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768480430] [2019-11-06 22:11:15,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:15,089 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:11:15,090 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2084079689] [2019-11-06 22:11:15,090 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 [2019-11-06 22:11:15,185 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-11-06 22:11:15,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 22:11:15,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 22:11:15,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:11:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2319 backedges. 1029 proven. 57 refuted. 0 times theorem prover too weak. 1233 trivial. 0 not checked. [2019-11-06 22:11:15,306 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768480430] [2019-11-06 22:11:15,306 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 22:11:15,306 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084079689] [2019-11-06 22:11:15,307 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:11:15,307 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 22:11:15,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797586384] [2019-11-06 22:11:15,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 22:11:15,308 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:11:15,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 22:11:15,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:11:15,309 INFO L87 Difference]: Start difference. First operand 112 states and 123 transitions. Second operand 10 states. [2019-11-06 22:11:15,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:11:15,380 INFO L93 Difference]: Finished difference Result 186 states and 212 transitions. [2019-11-06 22:11:15,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 22:11:15,381 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 193 [2019-11-06 22:11:15,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:11:15,382 INFO L225 Difference]: With dead ends: 186 [2019-11-06 22:11:15,383 INFO L226 Difference]: Without dead ends: 117 [2019-11-06 22:11:15,384 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:11:15,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-06 22:11:15,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2019-11-06 22:11:15,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-11-06 22:11:15,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2019-11-06 22:11:15,392 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 193 [2019-11-06 22:11:15,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:11:15,392 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2019-11-06 22:11:15,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 22:11:15,392 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2019-11-06 22:11:15,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-11-06 22:11:15,394 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:11:15,394 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 21, 18, 15, 15, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:11:15,597 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:11:15,598 INFO L410 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:11:15,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:11:15,598 INFO L82 PathProgramCache]: Analyzing trace with hash -96230834, now seen corresponding path program 30 times [2019-11-06 22:11:15,598 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:11:15,599 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713513160] [2019-11-06 22:11:15,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:11:15,616 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 22:11:15,616 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1263004945] [2019-11-06 22:11:15,617 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