/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:12:40,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:12:40,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:12:40,956 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:12:40,956 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:12:40,958 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:12:40,960 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:12:40,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:12:40,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:12:40,976 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:12:40,979 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:12:40,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:12:40,981 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:12:40,983 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:12:40,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:12:40,986 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:12:40,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:12:40,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:12:40,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:12:40,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:12:40,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:12:41,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:12:41,004 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:12:41,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:12:41,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:12:41,021 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 22:12:41,051 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:12:41,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:12:41,052 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:12:41,053 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:12:41,053 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:12:41,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:12:41,053 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:12:41,053 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:12:41,058 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:12:41,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:12:41,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:12:41,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:12:41,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:12:41,060 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:12:41,060 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:12:41,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:12:41,060 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:12:41,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:12:41,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:12:41,063 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:12:41,063 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:12:41,063 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:12:41,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:12:41,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:12:41,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:12:41,064 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:12:41,064 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:12:41,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:12:41,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:12:41,065 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:12:41,312 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:12:41,331 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:12:41,334 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:12:41,336 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:12:41,336 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:12:41,337 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2019-11-23 22:12:41,396 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ae5dfdb0/ee699e94cbad47b6b62363c03a339323/FLAG527ce4b64 [2019-11-23 22:12:41,826 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:12:41,827 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2019-11-23 22:12:41,833 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ae5dfdb0/ee699e94cbad47b6b62363c03a339323/FLAG527ce4b64 [2019-11-23 22:12:42,224 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ae5dfdb0/ee699e94cbad47b6b62363c03a339323 [2019-11-23 22:12:42,233 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:12:42,234 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:12:42,235 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:12:42,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:12:42,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:12:42,242 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:12:42" (1/1) ... [2019-11-23 22:12:42,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70d5a3a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:42, skipping insertion in model container [2019-11-23 22:12:42,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:12:42" (1/1) ... [2019-11-23 22:12:42,253 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:12:42,279 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:12:42,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:12:42,460 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:12:42,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:12:42,492 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:12:42,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:42 WrapperNode [2019-11-23 22:12:42,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:12:42,493 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:12:42,493 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:12:42,493 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:12:42,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:42" (1/1) ... [2019-11-23 22:12:42,510 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:42" (1/1) ... [2019-11-23 22:12:42,607 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:12:42,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:12:42,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:12:42,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:12:42,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:42" (1/1) ... [2019-11-23 22:12:42,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:42" (1/1) ... [2019-11-23 22:12:42,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:42" (1/1) ... [2019-11-23 22:12:42,617 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:42" (1/1) ... [2019-11-23 22:12:42,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:42" (1/1) ... [2019-11-23 22:12:42,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:42" (1/1) ... [2019-11-23 22:12:42,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:42" (1/1) ... [2019-11-23 22:12:42,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:12:42,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:12:42,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:12:42,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:12:42,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:12:42,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:12:42,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:12:42,844 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:12:42,844 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-23 22:12:42,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:12:42 BoogieIcfgContainer [2019-11-23 22:12:42,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:12:42,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:12:42,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:12:42,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:12:42,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:12:42" (1/3) ... [2019-11-23 22:12:42,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66135583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:12:42, skipping insertion in model container [2019-11-23 22:12:42,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:42" (2/3) ... [2019-11-23 22:12:42,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66135583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:12:42, skipping insertion in model container [2019-11-23 22:12:42,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:12:42" (3/3) ... [2019-11-23 22:12:42,852 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.v+cfa-reducer.c [2019-11-23 22:12:42,860 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:12:42,867 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:12:42,877 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:12:42,899 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:12:42,899 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:12:42,899 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:12:42,900 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:12:42,900 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:12:42,900 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:12:42,900 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:12:42,900 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:12:42,913 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-23 22:12:42,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 22:12:42,918 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:42,918 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:42,919 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:42,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:42,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1806908747, now seen corresponding path program 1 times [2019-11-23 22:12:42,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:42,931 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85215002] [2019-11-23 22:12:42,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:43,007 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:43,007 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910292476] [2019-11-23 22:12:43,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:43,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:12:43,047 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:43,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:43,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85215002] [2019-11-23 22:12:43,138 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:43,142 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910292476] [2019-11-23 22:12:43,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:12:43,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:12:43,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315965903] [2019-11-23 22:12:43,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:12:43,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:43,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:12:43,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:12:43,180 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2019-11-23 22:12:43,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:43,249 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2019-11-23 22:12:43,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:12:43,251 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-23 22:12:43,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:43,259 INFO L225 Difference]: With dead ends: 21 [2019-11-23 22:12:43,260 INFO L226 Difference]: Without dead ends: 9 [2019-11-23 22:12:43,263 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:12:43,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-23 22:12:43,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-23 22:12:43,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-23 22:12:43,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-23 22:12:43,292 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2019-11-23 22:12:43,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:43,293 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-23 22:12:43,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:12:43,293 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-23 22:12:43,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:12:43,294 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:43,294 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:43,496 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:43,497 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:43,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:43,498 INFO L82 PathProgramCache]: Analyzing trace with hash 179533835, now seen corresponding path program 1 times [2019-11-23 22:12:43,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:43,499 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701883465] [2019-11-23 22:12:43,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:43,509 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:43,509 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251220498] [2019-11-23 22:12:43,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:43,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:43,551 WARN L253 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:12:43,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:43,611 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:43,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701883465] [2019-11-23 22:12:43,635 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:43,635 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251220498] [2019-11-23 22:12:43,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:43,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 22:12:43,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245861091] [2019-11-23 22:12:43,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:12:43,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:43,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:12:43,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:12:43,639 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2019-11-23 22:12:43,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:43,700 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-11-23 22:12:43,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:12:43,701 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2019-11-23 22:12:43,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:43,701 INFO L225 Difference]: With dead ends: 13 [2019-11-23 22:12:43,701 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 22:12:43,703 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:12:43,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 22:12:43,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-23 22:12:43,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 22:12:43,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2019-11-23 22:12:43,707 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2019-11-23 22:12:43,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:43,708 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2019-11-23 22:12:43,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:12:43,708 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2019-11-23 22:12:43,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:12:43,709 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:43,709 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:43,913 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:43,913 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:43,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:43,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1270519115, now seen corresponding path program 2 times [2019-11-23 22:12:43,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:43,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112889657] [2019-11-23 22:12:43,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:43,935 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:43,935 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199501575] [2019-11-23 22:12:43,936 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:43,969 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:43,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:43,970 WARN L253 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:12:43,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:44,024 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:44,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:44,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112889657] [2019-11-23 22:12:44,039 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:44,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199501575] [2019-11-23 22:12:44,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:44,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 22:12:44,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440689658] [2019-11-23 22:12:44,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:12:44,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:44,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:12:44,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:12:44,041 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2019-11-23 22:12:44,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:44,099 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-11-23 22:12:44,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:12:44,100 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-11-23 22:12:44,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:44,101 INFO L225 Difference]: With dead ends: 14 [2019-11-23 22:12:44,101 INFO L226 Difference]: Without dead ends: 11 [2019-11-23 22:12:44,102 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:12:44,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-23 22:12:44,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-23 22:12:44,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-23 22:12:44,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-11-23 22:12:44,106 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2019-11-23 22:12:44,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:44,106 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-11-23 22:12:44,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:12:44,106 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-11-23 22:12:44,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:12:44,107 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:44,107 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:44,310 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:44,311 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:44,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:44,311 INFO L82 PathProgramCache]: Analyzing trace with hash 731324427, now seen corresponding path program 3 times [2019-11-23 22:12:44,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:44,312 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975270058] [2019-11-23 22:12:44,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:44,321 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:44,322 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [836171398] [2019-11-23 22:12:44,322 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:44,351 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 22:12:44,351 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:44,352 WARN L253 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 22:12:44,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:44,415 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:44,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975270058] [2019-11-23 22:12:44,433 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:44,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836171398] [2019-11-23 22:12:44,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:44,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 22:12:44,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239861110] [2019-11-23 22:12:44,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:12:44,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:44,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:12:44,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:12:44,436 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2019-11-23 22:12:44,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:44,541 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-11-23 22:12:44,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:12:44,542 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-11-23 22:12:44,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:44,542 INFO L225 Difference]: With dead ends: 15 [2019-11-23 22:12:44,543 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 22:12:44,543 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:12:44,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 22:12:44,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 22:12:44,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 22:12:44,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-11-23 22:12:44,547 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-11-23 22:12:44,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:44,548 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-11-23 22:12:44,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:12:44,548 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-11-23 22:12:44,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 22:12:44,548 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:44,549 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:44,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:44,754 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:44,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:44,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1196158283, now seen corresponding path program 4 times [2019-11-23 22:12:44,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:44,755 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933883161] [2019-11-23 22:12:44,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:44,766 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:44,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43927998] [2019-11-23 22:12:44,766 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:44,827 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:44,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:44,828 WARN L253 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 22:12:44,829 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:44,893 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:44,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:44,906 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933883161] [2019-11-23 22:12:44,906 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:44,906 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43927998] [2019-11-23 22:12:44,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:44,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 22:12:44,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627156077] [2019-11-23 22:12:44,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:12:44,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:44,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:12:44,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:12:44,908 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2019-11-23 22:12:44,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:44,984 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-11-23 22:12:44,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:12:44,985 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-11-23 22:12:44,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:44,985 INFO L225 Difference]: With dead ends: 16 [2019-11-23 22:12:44,986 INFO L226 Difference]: Without dead ends: 13 [2019-11-23 22:12:44,987 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:12:44,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-23 22:12:44,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-23 22:12:44,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 22:12:44,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-11-23 22:12:44,991 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-11-23 22:12:44,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:44,991 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-11-23 22:12:44,991 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:12:44,991 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-11-23 22:12:44,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 22:12:44,992 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:44,992 INFO L410 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:45,195 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:45,195 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:45,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:45,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1573861365, now seen corresponding path program 5 times [2019-11-23 22:12:45,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:45,197 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744337535] [2019-11-23 22:12:45,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:45,208 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:45,208 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137813327] [2019-11-23 22:12:45,208 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:45,236 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 22:12:45,236 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:45,237 WARN L253 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 22:12:45,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:45,314 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:45,325 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:45,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744337535] [2019-11-23 22:12:45,326 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:45,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137813327] [2019-11-23 22:12:45,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:45,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 22:12:45,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489140317] [2019-11-23 22:12:45,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:12:45,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:45,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:12:45,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:12:45,328 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 9 states. [2019-11-23 22:12:45,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:45,397 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2019-11-23 22:12:45,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:12:45,398 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-11-23 22:12:45,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:45,399 INFO L225 Difference]: With dead ends: 17 [2019-11-23 22:12:45,399 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 22:12:45,399 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:12:45,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 22:12:45,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-23 22:12:45,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 22:12:45,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-11-23 22:12:45,403 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-11-23 22:12:45,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:45,403 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-11-23 22:12:45,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:12:45,403 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-11-23 22:12:45,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 22:12:45,404 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:45,404 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:45,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:45,608 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:45,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:45,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1545124533, now seen corresponding path program 6 times [2019-11-23 22:12:45,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:45,610 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409068203] [2019-11-23 22:12:45,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:45,637 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:45,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498191651] [2019-11-23 22:12:45,638 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:45,670 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 22:12:45,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:45,671 WARN L253 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 22:12:45,672 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:45,770 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:45,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409068203] [2019-11-23 22:12:45,787 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:45,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498191651] [2019-11-23 22:12:45,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:45,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-23 22:12:45,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129893568] [2019-11-23 22:12:45,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:12:45,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:45,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:12:45,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:12:45,789 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2019-11-23 22:12:45,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:45,882 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-11-23 22:12:45,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:12:45,883 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-11-23 22:12:45,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:45,883 INFO L225 Difference]: With dead ends: 18 [2019-11-23 22:12:45,883 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 22:12:45,884 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:12:45,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 22:12:45,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-23 22:12:45,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 22:12:45,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-11-23 22:12:45,888 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-11-23 22:12:45,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:45,888 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-11-23 22:12:45,888 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:12:45,889 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-11-23 22:12:45,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:12:45,889 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:45,889 INFO L410 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:46,093 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:46,094 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:46,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:46,095 INFO L82 PathProgramCache]: Analyzing trace with hash -654282741, now seen corresponding path program 7 times [2019-11-23 22:12:46,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:46,096 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42161869] [2019-11-23 22:12:46,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:46,107 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:46,107 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463551640] [2019-11-23 22:12:46,107 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:46,144 WARN L253 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 22:12:46,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:46,285 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:46,304 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:46,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42161869] [2019-11-23 22:12:46,305 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:46,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463551640] [2019-11-23 22:12:46,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:46,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-23 22:12:46,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841646716] [2019-11-23 22:12:46,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:12:46,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:46,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:12:46,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:12:46,307 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 11 states. [2019-11-23 22:12:46,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:46,442 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-11-23 22:12:46,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:12:46,443 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-11-23 22:12:46,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:46,443 INFO L225 Difference]: With dead ends: 19 [2019-11-23 22:12:46,443 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 22:12:46,444 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:12:46,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 22:12:46,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-23 22:12:46,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 22:12:46,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-11-23 22:12:46,448 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-11-23 22:12:46,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:46,448 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-11-23 22:12:46,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:12:46,449 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-11-23 22:12:46,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:12:46,456 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:46,456 INFO L410 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:46,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:46,657 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:46,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:46,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1192009035, now seen corresponding path program 8 times [2019-11-23 22:12:46,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:46,658 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386959565] [2019-11-23 22:12:46,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:46,668 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:46,669 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901234981] [2019-11-23 22:12:46,669 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:46,695 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:46,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:46,697 WARN L253 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-23 22:12:46,698 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:46,813 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:46,829 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:46,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386959565] [2019-11-23 22:12:46,829 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:46,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901234981] [2019-11-23 22:12:46,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:46,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-23 22:12:46,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456469855] [2019-11-23 22:12:46,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:12:46,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:46,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:12:46,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:12:46,831 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 12 states. [2019-11-23 22:12:46,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:46,976 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-11-23 22:12:46,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:12:46,977 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-11-23 22:12:46,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:46,978 INFO L225 Difference]: With dead ends: 20 [2019-11-23 22:12:46,978 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 22:12:46,978 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:12:46,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 22:12:46,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-23 22:12:46,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 22:12:46,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-11-23 22:12:46,983 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-11-23 22:12:46,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:46,983 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-11-23 22:12:46,984 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:12:46,984 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-11-23 22:12:46,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 22:12:46,984 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:46,984 INFO L410 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:47,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:47,187 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:47,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:47,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1702488053, now seen corresponding path program 9 times [2019-11-23 22:12:47,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:47,189 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778240754] [2019-11-23 22:12:47,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:47,201 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:47,202 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291273862] [2019-11-23 22:12:47,202 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:47,244 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 22:12:47,245 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:47,246 WARN L253 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 47 conjunts are in the unsatisfiable core [2019-11-23 22:12:47,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:47,387 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:47,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778240754] [2019-11-23 22:12:47,403 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:47,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291273862] [2019-11-23 22:12:47,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:47,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-23 22:12:47,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990335236] [2019-11-23 22:12:47,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:12:47,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:47,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:12:47,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:12:47,405 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 13 states. [2019-11-23 22:12:47,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:47,551 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-11-23 22:12:47,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:12:47,551 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-11-23 22:12:47,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:47,552 INFO L225 Difference]: With dead ends: 21 [2019-11-23 22:12:47,552 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 22:12:47,552 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:12:47,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 22:12:47,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-23 22:12:47,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 22:12:47,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-11-23 22:12:47,557 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2019-11-23 22:12:47,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:47,557 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-11-23 22:12:47,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:12:47,557 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-11-23 22:12:47,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:12:47,558 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:47,558 INFO L410 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:47,762 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:47,763 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:47,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:47,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1237584565, now seen corresponding path program 10 times [2019-11-23 22:12:47,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:47,764 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55351337] [2019-11-23 22:12:47,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:47,785 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:47,786 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493788712] [2019-11-23 22:12:47,786 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:47,871 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:47,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:47,872 WARN L253 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 51 conjunts are in the unsatisfiable core [2019-11-23 22:12:47,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:48,016 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:48,042 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:48,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55351337] [2019-11-23 22:12:48,043 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:48,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493788712] [2019-11-23 22:12:48,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:48,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-23 22:12:48,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260579716] [2019-11-23 22:12:48,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:12:48,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:48,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:12:48,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:12:48,045 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 14 states. [2019-11-23 22:12:48,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:48,180 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-11-23 22:12:48,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 22:12:48,182 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-11-23 22:12:48,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:48,182 INFO L225 Difference]: With dead ends: 22 [2019-11-23 22:12:48,183 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 22:12:48,183 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:12:48,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 22:12:48,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-23 22:12:48,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 22:12:48,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-11-23 22:12:48,188 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2019-11-23 22:12:48,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:48,188 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-11-23 22:12:48,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:12:48,189 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-11-23 22:12:48,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 22:12:48,189 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:48,189 INFO L410 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:48,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:48,396 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:48,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:48,397 INFO L82 PathProgramCache]: Analyzing trace with hash 289521675, now seen corresponding path program 11 times [2019-11-23 22:12:48,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:48,397 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616386479] [2019-11-23 22:12:48,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:48,407 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:48,407 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [645229591] [2019-11-23 22:12:48,407 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:48,442 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-23 22:12:48,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:48,444 WARN L253 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 55 conjunts are in the unsatisfiable core [2019-11-23 22:12:48,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:48,597 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:48,618 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:48,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616386479] [2019-11-23 22:12:48,618 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:48,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645229591] [2019-11-23 22:12:48,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:48,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-11-23 22:12:48,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145848047] [2019-11-23 22:12:48,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:12:48,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:48,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:12:48,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:12:48,621 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 15 states. [2019-11-23 22:12:48,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:48,798 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-11-23 22:12:48,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 22:12:48,799 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-11-23 22:12:48,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:48,799 INFO L225 Difference]: With dead ends: 23 [2019-11-23 22:12:48,799 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 22:12:48,800 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:12:48,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 22:12:48,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-23 22:12:48,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 22:12:48,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-11-23 22:12:48,804 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2019-11-23 22:12:48,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:48,805 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-11-23 22:12:48,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:12:48,805 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-11-23 22:12:48,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:12:48,806 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:48,806 INFO L410 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:49,013 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:49,013 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:49,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:49,014 INFO L82 PathProgramCache]: Analyzing trace with hash 385174859, now seen corresponding path program 12 times [2019-11-23 22:12:49,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:49,015 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240592505] [2019-11-23 22:12:49,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:49,028 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:49,029 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083649652] [2019-11-23 22:12:49,029 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:49,069 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 22:12:49,069 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:49,071 WARN L253 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 59 conjunts are in the unsatisfiable core [2019-11-23 22:12:49,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:49,266 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:49,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240592505] [2019-11-23 22:12:49,289 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:49,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083649652] [2019-11-23 22:12:49,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:49,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-11-23 22:12:49,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769730627] [2019-11-23 22:12:49,290 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:12:49,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:49,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:12:49,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:12:49,292 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 16 states. [2019-11-23 22:12:49,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:49,468 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-11-23 22:12:49,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:12:49,469 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-11-23 22:12:49,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:49,469 INFO L225 Difference]: With dead ends: 24 [2019-11-23 22:12:49,470 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 22:12:49,470 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:12:49,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 22:12:49,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-23 22:12:49,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 22:12:49,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-11-23 22:12:49,478 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2019-11-23 22:12:49,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:49,478 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-11-23 22:12:49,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:12:49,478 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-11-23 22:12:49,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 22:12:49,480 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:49,480 INFO L410 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:49,684 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:49,685 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:49,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:49,685 INFO L82 PathProgramCache]: Analyzing trace with hash -944543733, now seen corresponding path program 13 times [2019-11-23 22:12:49,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:49,685 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521379904] [2019-11-23 22:12:49,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:49,701 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:49,705 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048367681] [2019-11-23 22:12:49,705 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:49,747 WARN L253 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 63 conjunts are in the unsatisfiable core [2019-11-23 22:12:49,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:49,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:49,945 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:49,945 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521379904] [2019-11-23 22:12:49,945 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:49,946 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048367681] [2019-11-23 22:12:49,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:49,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-11-23 22:12:49,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308683466] [2019-11-23 22:12:49,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:12:49,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:49,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:12:49,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:12:49,948 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 17 states. [2019-11-23 22:12:50,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:50,156 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-11-23 22:12:50,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:12:50,158 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-11-23 22:12:50,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:50,158 INFO L225 Difference]: With dead ends: 25 [2019-11-23 22:12:50,158 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 22:12:50,159 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:12:50,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 22:12:50,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-23 22:12:50,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 22:12:50,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-11-23 22:12:50,164 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2019-11-23 22:12:50,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:50,164 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-11-23 22:12:50,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:12:50,165 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-11-23 22:12:50,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 22:12:50,165 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:50,165 INFO L410 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:50,366 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:50,366 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:50,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:50,367 INFO L82 PathProgramCache]: Analyzing trace with hash 783852875, now seen corresponding path program 14 times [2019-11-23 22:12:50,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:50,368 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295521706] [2019-11-23 22:12:50,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:50,378 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:50,378 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585635366] [2019-11-23 22:12:50,378 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:50,412 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:50,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:50,413 WARN L253 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 67 conjunts are in the unsatisfiable core [2019-11-23 22:12:50,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:50,692 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:50,723 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:50,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295521706] [2019-11-23 22:12:50,723 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:50,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585635366] [2019-11-23 22:12:50,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:50,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-11-23 22:12:50,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739759335] [2019-11-23 22:12:50,724 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:12:50,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:50,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:12:50,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:12:50,725 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 18 states. [2019-11-23 22:12:51,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:51,056 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-11-23 22:12:51,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 22:12:51,057 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2019-11-23 22:12:51,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:51,057 INFO L225 Difference]: With dead ends: 26 [2019-11-23 22:12:51,058 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 22:12:51,058 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:12:51,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 22:12:51,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-23 22:12:51,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 22:12:51,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-11-23 22:12:51,066 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2019-11-23 22:12:51,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:51,068 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-11-23 22:12:51,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:12:51,068 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-11-23 22:12:51,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 22:12:51,069 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:51,069 INFO L410 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:51,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:51,270 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:51,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:51,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1470427125, now seen corresponding path program 15 times [2019-11-23 22:12:51,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:51,271 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266852872] [2019-11-23 22:12:51,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:51,282 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:51,282 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1662905658] [2019-11-23 22:12:51,282 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:51,357 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 22:12:51,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:51,359 WARN L253 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 71 conjunts are in the unsatisfiable core [2019-11-23 22:12:51,361 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:51,575 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:51,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266852872] [2019-11-23 22:12:51,602 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:51,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662905658] [2019-11-23 22:12:51,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:51,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-11-23 22:12:51,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366575903] [2019-11-23 22:12:51,603 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 22:12:51,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:51,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 22:12:51,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:12:51,604 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 19 states. [2019-11-23 22:12:51,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:51,851 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-11-23 22:12:51,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:12:51,852 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2019-11-23 22:12:51,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:51,853 INFO L225 Difference]: With dead ends: 27 [2019-11-23 22:12:51,853 INFO L226 Difference]: Without dead ends: 24 [2019-11-23 22:12:51,854 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:12:51,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-23 22:12:51,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-23 22:12:51,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 22:12:51,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-11-23 22:12:51,860 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2019-11-23 22:12:51,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:51,860 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-11-23 22:12:51,860 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 22:12:51,860 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-11-23 22:12:51,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 22:12:51,861 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:51,861 INFO L410 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:52,064 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:52,065 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:52,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:52,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1661336907, now seen corresponding path program 16 times [2019-11-23 22:12:52,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:52,067 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980865176] [2019-11-23 22:12:52,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:52,076 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:52,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155764421] [2019-11-23 22:12:52,077 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:52,213 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:52,213 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:52,215 WARN L253 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 75 conjunts are in the unsatisfiable core [2019-11-23 22:12:52,216 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:52,492 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:52,513 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:52,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980865176] [2019-11-23 22:12:52,514 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:52,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155764421] [2019-11-23 22:12:52,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:52,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-11-23 22:12:52,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041526581] [2019-11-23 22:12:52,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:12:52,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:52,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:12:52,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:12:52,516 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 20 states. [2019-11-23 22:12:52,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:52,785 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-11-23 22:12:52,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:12:52,785 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2019-11-23 22:12:52,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:52,786 INFO L225 Difference]: With dead ends: 28 [2019-11-23 22:12:52,786 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 22:12:52,787 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:12:52,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 22:12:52,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-23 22:12:52,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 22:12:52,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-11-23 22:12:52,792 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2019-11-23 22:12:52,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:52,792 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-11-23 22:12:52,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:12:52,792 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-11-23 22:12:52,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 22:12:52,793 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:52,793 INFO L410 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:52,996 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:52,997 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:52,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:52,997 INFO L82 PathProgramCache]: Analyzing trace with hash -38225909, now seen corresponding path program 17 times [2019-11-23 22:12:52,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:52,998 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880726006] [2019-11-23 22:12:52,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:53,020 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:53,021 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033601801] [2019-11-23 22:12:53,021 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:53,068 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-23 22:12:53,069 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:53,070 WARN L253 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 79 conjunts are in the unsatisfiable core [2019-11-23 22:12:53,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:53,324 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:53,348 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:53,349 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880726006] [2019-11-23 22:12:53,349 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:53,349 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033601801] [2019-11-23 22:12:53,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:53,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-11-23 22:12:53,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849289322] [2019-11-23 22:12:53,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:12:53,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:53,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:12:53,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:12:53,351 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 21 states. [2019-11-23 22:12:53,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:53,671 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-11-23 22:12:53,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 22:12:53,671 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2019-11-23 22:12:53,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:53,672 INFO L225 Difference]: With dead ends: 29 [2019-11-23 22:12:53,673 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 22:12:53,673 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:12:53,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 22:12:53,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-23 22:12:53,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 22:12:53,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-11-23 22:12:53,678 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2019-11-23 22:12:53,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:53,678 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-11-23 22:12:53,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:12:53,678 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-11-23 22:12:53,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 22:12:53,679 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:53,679 INFO L410 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:53,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:53,882 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:53,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:53,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1185065653, now seen corresponding path program 18 times [2019-11-23 22:12:53,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:53,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931640715] [2019-11-23 22:12:53,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:53,901 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:53,902 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878601663] [2019-11-23 22:12:53,902 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:53,947 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-11-23 22:12:53,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:53,949 WARN L253 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 83 conjunts are in the unsatisfiable core [2019-11-23 22:12:53,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:54,191 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:54,212 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:54,213 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931640715] [2019-11-23 22:12:54,213 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:54,213 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878601663] [2019-11-23 22:12:54,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:54,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-11-23 22:12:54,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053436519] [2019-11-23 22:12:54,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 22:12:54,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:54,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 22:12:54,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:12:54,216 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 22 states. [2019-11-23 22:12:54,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:54,589 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-11-23 22:12:54,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 22:12:54,590 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2019-11-23 22:12:54,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:54,590 INFO L225 Difference]: With dead ends: 30 [2019-11-23 22:12:54,590 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 22:12:54,591 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:12:54,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 22:12:54,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-23 22:12:54,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:12:54,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-11-23 22:12:54,595 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2019-11-23 22:12:54,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:54,596 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-11-23 22:12:54,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 22:12:54,596 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-11-23 22:12:54,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 22:12:54,597 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:54,597 INFO L410 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:54,800 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:54,800 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:54,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:54,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1917607947, now seen corresponding path program 19 times [2019-11-23 22:12:54,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:54,801 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520201575] [2019-11-23 22:12:54,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:54,810 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:54,810 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [566213182] [2019-11-23 22:12:54,810 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:54,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:54,850 WARN L253 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 87 conjunts are in the unsatisfiable core [2019-11-23 22:12:54,851 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:55,157 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:55,180 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:55,180 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520201575] [2019-11-23 22:12:55,181 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:55,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566213182] [2019-11-23 22:12:55,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:55,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-11-23 22:12:55,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332141700] [2019-11-23 22:12:55,182 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 22:12:55,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:55,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 22:12:55,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:12:55,183 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 23 states. [2019-11-23 22:12:55,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:55,583 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-11-23 22:12:55,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 22:12:55,584 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2019-11-23 22:12:55,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:55,584 INFO L225 Difference]: With dead ends: 31 [2019-11-23 22:12:55,585 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 22:12:55,585 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:12:55,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 22:12:55,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-23 22:12:55,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 22:12:55,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-11-23 22:12:55,591 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2019-11-23 22:12:55,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:55,591 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-11-23 22:12:55,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 22:12:55,591 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-11-23 22:12:55,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 22:12:55,592 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:55,592 INFO L410 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:55,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:55,795 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:55,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:55,796 INFO L82 PathProgramCache]: Analyzing trace with hash -683758261, now seen corresponding path program 20 times [2019-11-23 22:12:55,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:55,797 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136003630] [2019-11-23 22:12:55,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:55,805 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:55,805 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70129047] [2019-11-23 22:12:55,805 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:55,859 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:55,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:55,861 WARN L253 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 91 conjunts are in the unsatisfiable core [2019-11-23 22:12:55,864 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:56,166 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:56,193 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136003630] [2019-11-23 22:12:56,193 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:56,193 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70129047] [2019-11-23 22:12:56,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:56,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-11-23 22:12:56,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695649518] [2019-11-23 22:12:56,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 22:12:56,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:56,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 22:12:56,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:12:56,196 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 24 states. [2019-11-23 22:12:56,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:56,676 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-11-23 22:12:56,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 22:12:56,677 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2019-11-23 22:12:56,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:56,677 INFO L225 Difference]: With dead ends: 32 [2019-11-23 22:12:56,677 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 22:12:56,678 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:12:56,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 22:12:56,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-23 22:12:56,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 22:12:56,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-11-23 22:12:56,683 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2019-11-23 22:12:56,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:56,683 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-11-23 22:12:56,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 22:12:56,683 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-11-23 22:12:56,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 22:12:56,684 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:56,684 INFO L410 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:56,888 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:56,888 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:56,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:56,889 INFO L82 PathProgramCache]: Analyzing trace with hash 278267915, now seen corresponding path program 21 times [2019-11-23 22:12:56,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:56,890 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017387792] [2019-11-23 22:12:56,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:56,898 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:56,898 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024711372] [2019-11-23 22:12:56,899 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:57,021 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 22:12:57,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:57,023 WARN L253 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 95 conjunts are in the unsatisfiable core [2019-11-23 22:12:57,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:57,350 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:57,373 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017387792] [2019-11-23 22:12:57,373 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:57,373 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024711372] [2019-11-23 22:12:57,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:57,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-11-23 22:12:57,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864512624] [2019-11-23 22:12:57,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 22:12:57,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:57,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 22:12:57,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:12:57,375 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 25 states. [2019-11-23 22:12:57,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:57,850 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-11-23 22:12:57,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 22:12:57,852 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2019-11-23 22:12:57,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:57,852 INFO L225 Difference]: With dead ends: 33 [2019-11-23 22:12:57,852 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 22:12:57,853 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2019-11-23 22:12:57,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 22:12:57,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-11-23 22:12:57,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 22:12:57,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-11-23 22:12:57,857 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2019-11-23 22:12:57,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:57,858 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-11-23 22:12:57,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 22:12:57,858 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-11-23 22:12:57,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 22:12:57,858 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:57,859 INFO L410 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:58,061 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:58,062 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:58,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:58,063 INFO L82 PathProgramCache]: Analyzing trace with hash 36308299, now seen corresponding path program 22 times [2019-11-23 22:12:58,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:58,063 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074890970] [2019-11-23 22:12:58,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:58,071 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:58,071 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681177869] [2019-11-23 22:12:58,071 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:58,266 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:58,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:58,268 WARN L253 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 99 conjunts are in the unsatisfiable core [2019-11-23 22:12:58,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:58,645 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:58,671 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:58,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074890970] [2019-11-23 22:12:58,672 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:58,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681177869] [2019-11-23 22:12:58,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:58,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-11-23 22:12:58,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236690920] [2019-11-23 22:12:58,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 22:12:58,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:58,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 22:12:58,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2019-11-23 22:12:58,674 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 26 states. [2019-11-23 22:12:59,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:59,130 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-11-23 22:12:59,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 22:12:59,131 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2019-11-23 22:12:59,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:59,132 INFO L225 Difference]: With dead ends: 34 [2019-11-23 22:12:59,132 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 22:12:59,133 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:12:59,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 22:12:59,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-11-23 22:12:59,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 22:12:59,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-11-23 22:12:59,138 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2019-11-23 22:12:59,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:59,138 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-11-23 22:12:59,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 22:12:59,138 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-11-23 22:12:59,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 22:12:59,138 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:59,138 INFO L410 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:59,339 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:59,339 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:59,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:59,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1125494795, now seen corresponding path program 23 times [2019-11-23 22:12:59,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:59,341 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420476198] [2019-11-23 22:12:59,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:59,349 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:59,350 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499995948] [2019-11-23 22:12:59,350 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:59,401 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-11-23 22:12:59,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:59,403 WARN L253 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 103 conjunts are in the unsatisfiable core [2019-11-23 22:12:59,404 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:59,798 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:59,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420476198] [2019-11-23 22:12:59,823 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:59,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499995948] [2019-11-23 22:12:59,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:59,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-11-23 22:12:59,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060631089] [2019-11-23 22:12:59,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 22:12:59,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:59,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 22:12:59,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:12:59,825 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 27 states. [2019-11-23 22:13:00,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:00,310 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-11-23 22:13:00,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 22:13:00,310 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2019-11-23 22:13:00,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:00,310 INFO L225 Difference]: With dead ends: 35 [2019-11-23 22:13:00,310 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 22:13:00,311 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:13:00,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 22:13:00,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-23 22:13:00,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 22:13:00,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-11-23 22:13:00,316 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2019-11-23 22:13:00,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:00,316 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-11-23 22:13:00,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 22:13:00,316 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-11-23 22:13:00,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 22:13:00,317 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:00,317 INFO L410 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:00,519 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:00,520 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:00,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:00,521 INFO L82 PathProgramCache]: Analyzing trace with hash 530537803, now seen corresponding path program 24 times [2019-11-23 22:13:00,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:00,521 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260806598] [2019-11-23 22:13:00,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:00,530 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:00,530 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061835563] [2019-11-23 22:13:00,530 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:00,605 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 22:13:00,605 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:00,608 WARN L253 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 107 conjunts are in the unsatisfiable core [2019-11-23 22:13:00,609 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:01,024 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:01,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260806598] [2019-11-23 22:13:01,051 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:01,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061835563] [2019-11-23 22:13:01,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:01,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-11-23 22:13:01,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910122116] [2019-11-23 22:13:01,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 22:13:01,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:01,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 22:13:01,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:13:01,053 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 28 states. [2019-11-23 22:13:01,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:01,585 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-11-23 22:13:01,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 22:13:01,586 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2019-11-23 22:13:01,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:01,586 INFO L225 Difference]: With dead ends: 36 [2019-11-23 22:13:01,586 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 22:13:01,587 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:13:01,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 22:13:01,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-23 22:13:01,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 22:13:01,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-11-23 22:13:01,593 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2019-11-23 22:13:01,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:01,593 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-11-23 22:13:01,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 22:13:01,593 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-11-23 22:13:01,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 22:13:01,594 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:01,594 INFO L410 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:01,797 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:01,797 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:01,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:01,798 INFO L82 PathProgramCache]: Analyzing trace with hash -733259765, now seen corresponding path program 25 times [2019-11-23 22:13:01,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:01,799 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625000455] [2019-11-23 22:13:01,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:01,806 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:01,807 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460457076] [2019-11-23 22:13:01,807 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:01,864 WARN L253 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 111 conjunts are in the unsatisfiable core [2019-11-23 22:13:01,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:02,306 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:02,332 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:02,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625000455] [2019-11-23 22:13:02,333 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:02,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460457076] [2019-11-23 22:13:02,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:02,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-11-23 22:13:02,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34536792] [2019-11-23 22:13:02,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 22:13:02,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:02,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 22:13:02,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:13:02,334 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 29 states. [2019-11-23 22:13:02,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:02,892 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2019-11-23 22:13:02,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 22:13:02,893 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2019-11-23 22:13:02,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:02,893 INFO L225 Difference]: With dead ends: 37 [2019-11-23 22:13:02,894 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 22:13:02,895 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:13:02,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 22:13:02,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-11-23 22:13:02,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 22:13:02,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-11-23 22:13:02,900 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2019-11-23 22:13:02,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:02,901 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-11-23 22:13:02,901 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 22:13:02,901 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-11-23 22:13:02,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 22:13:02,901 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:02,902 INFO L410 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:03,104 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:03,105 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:03,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:03,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1256278709, now seen corresponding path program 26 times [2019-11-23 22:13:03,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:03,106 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530642008] [2019-11-23 22:13:03,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:03,115 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:03,115 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1409082446] [2019-11-23 22:13:03,115 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:03,165 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:13:03,165 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:03,167 WARN L253 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 115 conjunts are in the unsatisfiable core [2019-11-23 22:13:03,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:03,634 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:03,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530642008] [2019-11-23 22:13:03,668 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:03,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409082446] [2019-11-23 22:13:03,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:03,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-11-23 22:13:03,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746746173] [2019-11-23 22:13:03,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 22:13:03,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:03,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 22:13:03,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:13:03,670 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 30 states. [2019-11-23 22:13:04,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:04,313 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2019-11-23 22:13:04,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 22:13:04,314 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2019-11-23 22:13:04,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:04,314 INFO L225 Difference]: With dead ends: 38 [2019-11-23 22:13:04,314 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 22:13:04,315 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:13:04,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 22:13:04,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-23 22:13:04,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 22:13:04,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-11-23 22:13:04,320 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2019-11-23 22:13:04,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:04,320 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-11-23 22:13:04,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 22:13:04,320 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-11-23 22:13:04,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 22:13:04,321 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:04,321 INFO L410 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:04,523 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:04,524 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:04,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:04,525 INFO L82 PathProgramCache]: Analyzing trace with hash -289996789, now seen corresponding path program 27 times [2019-11-23 22:13:04,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:04,525 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612085095] [2019-11-23 22:13:04,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:04,533 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:04,534 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371128723] [2019-11-23 22:13:04,534 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:04,825 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-11-23 22:13:04,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:04,827 WARN L253 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 119 conjunts are in the unsatisfiable core [2019-11-23 22:13:04,828 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:05,327 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:05,361 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:05,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612085095] [2019-11-23 22:13:05,361 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:05,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371128723] [2019-11-23 22:13:05,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:05,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-11-23 22:13:05,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757171933] [2019-11-23 22:13:05,362 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 22:13:05,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:05,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 22:13:05,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:13:05,362 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 31 states. [2019-11-23 22:13:06,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:06,021 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-11-23 22:13:06,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 22:13:06,021 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2019-11-23 22:13:06,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:06,021 INFO L225 Difference]: With dead ends: 39 [2019-11-23 22:13:06,021 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 22:13:06,022 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:13:06,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 22:13:06,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-23 22:13:06,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 22:13:06,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-11-23 22:13:06,026 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2019-11-23 22:13:06,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:06,027 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-11-23 22:13:06,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 22:13:06,027 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-11-23 22:13:06,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 22:13:06,027 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:06,027 INFO L410 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:06,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:06,230 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:06,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:06,231 INFO L82 PathProgramCache]: Analyzing trace with hash -400028341, now seen corresponding path program 28 times [2019-11-23 22:13:06,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:06,232 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991172267] [2019-11-23 22:13:06,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:06,245 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:06,245 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670513805] [2019-11-23 22:13:06,245 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:06,483 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:13:06,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:06,485 WARN L253 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 123 conjunts are in the unsatisfiable core [2019-11-23 22:13:06,486 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:06,984 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:07,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991172267] [2019-11-23 22:13:07,022 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:07,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670513805] [2019-11-23 22:13:07,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:07,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-11-23 22:13:07,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947578979] [2019-11-23 22:13:07,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 22:13:07,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:07,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 22:13:07,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:13:07,024 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 32 states. [2019-11-23 22:13:07,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:07,713 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-11-23 22:13:07,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 22:13:07,713 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2019-11-23 22:13:07,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:07,714 INFO L225 Difference]: With dead ends: 40 [2019-11-23 22:13:07,714 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 22:13:07,715 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:13:07,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 22:13:07,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-23 22:13:07,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 22:13:07,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-11-23 22:13:07,719 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2019-11-23 22:13:07,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:07,720 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-11-23 22:13:07,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 22:13:07,720 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-11-23 22:13:07,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 22:13:07,720 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:07,720 INFO L410 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:07,924 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:07,924 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:07,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:07,925 INFO L82 PathProgramCache]: Analyzing trace with hash 483960843, now seen corresponding path program 29 times [2019-11-23 22:13:07,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:07,925 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272899620] [2019-11-23 22:13:07,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:07,933 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:07,934 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463639825] [2019-11-23 22:13:07,934 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:07,991 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-11-23 22:13:07,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:07,995 WARN L253 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 127 conjunts are in the unsatisfiable core [2019-11-23 22:13:07,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:08,565 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:08,599 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:08,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272899620] [2019-11-23 22:13:08,600 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:08,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463639825] [2019-11-23 22:13:08,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:08,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-11-23 22:13:08,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72331397] [2019-11-23 22:13:08,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 22:13:08,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:08,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 22:13:08,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:13:08,602 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 33 states. [2019-11-23 22:13:09,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:09,366 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2019-11-23 22:13:09,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 22:13:09,366 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2019-11-23 22:13:09,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:09,367 INFO L225 Difference]: With dead ends: 41 [2019-11-23 22:13:09,367 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 22:13:09,368 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:13:09,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 22:13:09,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-23 22:13:09,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 22:13:09,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-11-23 22:13:09,373 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2019-11-23 22:13:09,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:09,373 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-11-23 22:13:09,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 22:13:09,373 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-11-23 22:13:09,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 22:13:09,374 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:09,374 INFO L410 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:09,574 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:09,575 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:09,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:09,575 INFO L82 PathProgramCache]: Analyzing trace with hash 2117821771, now seen corresponding path program 30 times [2019-11-23 22:13:09,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:09,576 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608129065] [2019-11-23 22:13:09,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:09,583 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:09,584 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840006296] [2019-11-23 22:13:09,584 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:09,721 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-11-23 22:13:09,721 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:09,724 WARN L253 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 131 conjunts are in the unsatisfiable core [2019-11-23 22:13:09,725 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:10,307 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:10,340 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:10,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608129065] [2019-11-23 22:13:10,341 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:10,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840006296] [2019-11-23 22:13:10,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:10,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-11-23 22:13:10,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094084568] [2019-11-23 22:13:10,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 22:13:10,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:10,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 22:13:10,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:13:10,342 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 34 states. [2019-11-23 22:13:11,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:11,135 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-11-23 22:13:11,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 22:13:11,135 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2019-11-23 22:13:11,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:11,136 INFO L225 Difference]: With dead ends: 42 [2019-11-23 22:13:11,136 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 22:13:11,137 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:13:11,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 22:13:11,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-23 22:13:11,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 22:13:11,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-11-23 22:13:11,142 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2019-11-23 22:13:11,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:11,142 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-11-23 22:13:11,143 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 22:13:11,143 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-11-23 22:13:11,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 22:13:11,143 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:11,143 INFO L410 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:11,346 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:11,347 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:11,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:11,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1227902987, now seen corresponding path program 31 times [2019-11-23 22:13:11,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:11,348 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198276848] [2019-11-23 22:13:11,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:11,355 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:11,355 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1598490424] [2019-11-23 22:13:11,356 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:11,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:11,441 WARN L253 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 135 conjunts are in the unsatisfiable core [2019-11-23 22:13:11,443 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:12,462 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:12,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198276848] [2019-11-23 22:13:12,504 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:12,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598490424] [2019-11-23 22:13:12,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:12,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-11-23 22:13:12,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88574036] [2019-11-23 22:13:12,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 22:13:12,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:12,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 22:13:12,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:13:12,506 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 35 states. [2019-11-23 22:13:13,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:13,331 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-11-23 22:13:13,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 22:13:13,332 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2019-11-23 22:13:13,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:13,332 INFO L225 Difference]: With dead ends: 43 [2019-11-23 22:13:13,332 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 22:13:13,333 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:13:13,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 22:13:13,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-11-23 22:13:13,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 22:13:13,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-11-23 22:13:13,339 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2019-11-23 22:13:13,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:13,339 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-11-23 22:13:13,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 22:13:13,339 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-11-23 22:13:13,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 22:13:13,340 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:13,340 INFO L410 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:13,544 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:13,544 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:13,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:13,545 INFO L82 PathProgramCache]: Analyzing trace with hash -589775541, now seen corresponding path program 32 times [2019-11-23 22:13:13,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:13,546 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892416737] [2019-11-23 22:13:13,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:13,554 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:13,554 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962490046] [2019-11-23 22:13:13,554 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:13,615 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:13:13,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:13,617 WARN L253 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 139 conjunts are in the unsatisfiable core [2019-11-23 22:13:13,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:14,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:14,281 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:14,281 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892416737] [2019-11-23 22:13:14,281 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:14,281 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962490046] [2019-11-23 22:13:14,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:14,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-11-23 22:13:14,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690955139] [2019-11-23 22:13:14,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 22:13:14,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:14,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 22:13:14,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:13:14,283 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 36 states. [2019-11-23 22:13:15,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:15,149 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2019-11-23 22:13:15,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 22:13:15,149 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2019-11-23 22:13:15,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:15,150 INFO L225 Difference]: With dead ends: 44 [2019-11-23 22:13:15,150 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 22:13:15,151 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:13:15,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 22:13:15,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-23 22:13:15,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 22:13:15,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-11-23 22:13:15,155 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2019-11-23 22:13:15,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:15,155 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-11-23 22:13:15,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 22:13:15,156 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-11-23 22:13:15,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 22:13:15,156 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:15,156 INFO L410 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:15,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:15,358 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:15,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:15,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1103235061, now seen corresponding path program 33 times [2019-11-23 22:13:15,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:15,360 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645101842] [2019-11-23 22:13:15,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:15,368 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:15,369 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963073053] [2019-11-23 22:13:15,369 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:16,009 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-11-23 22:13:16,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:16,012 WARN L253 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 143 conjunts are in the unsatisfiable core [2019-11-23 22:13:16,014 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:16,712 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:16,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645101842] [2019-11-23 22:13:16,751 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:16,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963073053] [2019-11-23 22:13:16,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:16,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2019-11-23 22:13:16,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699637616] [2019-11-23 22:13:16,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 22:13:16,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:16,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 22:13:16,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:13:16,753 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 37 states. [2019-11-23 22:13:17,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:17,688 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-11-23 22:13:17,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 22:13:17,688 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2019-11-23 22:13:17,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:17,689 INFO L225 Difference]: With dead ends: 45 [2019-11-23 22:13:17,689 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 22:13:17,689 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 22:13:17,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 22:13:17,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-11-23 22:13:17,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 22:13:17,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2019-11-23 22:13:17,693 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2019-11-23 22:13:17,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:17,693 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2019-11-23 22:13:17,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 22:13:17,693 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2019-11-23 22:13:17,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 22:13:17,693 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:17,693 INFO L410 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:17,894 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:17,894 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:17,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:17,895 INFO L82 PathProgramCache]: Analyzing trace with hash 159389003, now seen corresponding path program 34 times [2019-11-23 22:13:17,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:17,895 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041726409] [2019-11-23 22:13:17,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:17,904 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:17,904 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970097131] [2019-11-23 22:13:17,904 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:18,196 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:13:18,196 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:18,198 WARN L253 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 147 conjunts are in the unsatisfiable core [2019-11-23 22:13:18,199 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:18,917 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:18,955 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:18,955 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041726409] [2019-11-23 22:13:18,955 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:18,955 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970097131] [2019-11-23 22:13:18,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:18,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-11-23 22:13:18,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199218537] [2019-11-23 22:13:18,956 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 22:13:18,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:18,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 22:13:18,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 22:13:18,957 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 38 states. [2019-11-23 22:13:19,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:19,961 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2019-11-23 22:13:19,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 22:13:19,961 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2019-11-23 22:13:19,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:19,961 INFO L225 Difference]: With dead ends: 46 [2019-11-23 22:13:19,961 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 22:13:19,962 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:13:19,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 22:13:19,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-11-23 22:13:19,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-23 22:13:19,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-11-23 22:13:19,968 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2019-11-23 22:13:19,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:19,968 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-11-23 22:13:19,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 22:13:19,968 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-11-23 22:13:19,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-23 22:13:19,969 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:19,969 INFO L410 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:20,171 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:20,171 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:20,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:20,172 INFO L82 PathProgramCache]: Analyzing trace with hash 646029323, now seen corresponding path program 35 times [2019-11-23 22:13:20,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:20,172 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266044787] [2019-11-23 22:13:20,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:20,179 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:20,179 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562408576] [2019-11-23 22:13:20,180 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:20,260 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-11-23 22:13:20,260 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:20,262 WARN L253 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 151 conjunts are in the unsatisfiable core [2019-11-23 22:13:20,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:20,986 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:21,022 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:21,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266044787] [2019-11-23 22:13:21,022 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:21,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562408576] [2019-11-23 22:13:21,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:21,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2019-11-23 22:13:21,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393296395] [2019-11-23 22:13:21,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 22:13:21,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:21,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 22:13:21,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:13:21,024 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 39 states. [2019-11-23 22:13:22,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:22,043 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-11-23 22:13:22,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 22:13:22,044 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2019-11-23 22:13:22,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:22,044 INFO L225 Difference]: With dead ends: 47 [2019-11-23 22:13:22,044 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 22:13:22,045 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:13:22,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 22:13:22,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-23 22:13:22,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 22:13:22,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-11-23 22:13:22,048 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2019-11-23 22:13:22,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:22,048 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-11-23 22:13:22,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 22:13:22,048 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-11-23 22:13:22,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 22:13:22,049 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:22,049 INFO L410 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:22,249 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:22,250 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:22,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:22,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1447989941, now seen corresponding path program 36 times [2019-11-23 22:13:22,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:22,251 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007086408] [2019-11-23 22:13:22,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:22,260 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:22,260 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [641853132] [2019-11-23 22:13:22,261 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:22,471 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 22:13:22,471 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:22,474 WARN L253 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 155 conjunts are in the unsatisfiable core [2019-11-23 22:13:22,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:23,237 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:23,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007086408] [2019-11-23 22:13:23,275 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:23,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641853132] [2019-11-23 22:13:23,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:23,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-11-23 22:13:23,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030814596] [2019-11-23 22:13:23,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 22:13:23,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:23,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 22:13:23,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:13:23,276 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 40 states. [2019-11-23 22:13:24,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:24,354 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-11-23 22:13:24,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 22:13:24,354 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2019-11-23 22:13:24,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:24,355 INFO L225 Difference]: With dead ends: 48 [2019-11-23 22:13:24,355 INFO L226 Difference]: Without dead ends: 45 [2019-11-23 22:13:24,357 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:13:24,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-23 22:13:24,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-11-23 22:13:24,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 22:13:24,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-11-23 22:13:24,362 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2019-11-23 22:13:24,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:24,362 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-11-23 22:13:24,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 22:13:24,362 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-11-23 22:13:24,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 22:13:24,363 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:24,363 INFO L410 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:24,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:24,563 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:24,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:24,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1938077685, now seen corresponding path program 37 times [2019-11-23 22:13:24,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:24,565 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591383240] [2019-11-23 22:13:24,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:24,573 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:24,573 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131736770] [2019-11-23 22:13:24,573 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:24,668 WARN L253 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 159 conjunts are in the unsatisfiable core [2019-11-23 22:13:24,670 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:25,701 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:25,743 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:25,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591383240] [2019-11-23 22:13:25,743 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:25,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131736770] [2019-11-23 22:13:25,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:25,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2019-11-23 22:13:25,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616086686] [2019-11-23 22:13:25,744 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 22:13:25,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:25,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 22:13:25,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:13:25,745 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 41 states. [2019-11-23 22:13:26,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:26,863 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-11-23 22:13:26,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 22:13:26,864 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2019-11-23 22:13:26,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:26,865 INFO L225 Difference]: With dead ends: 49 [2019-11-23 22:13:26,865 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 22:13:26,866 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:13:26,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 22:13:26,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-11-23 22:13:26,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 22:13:26,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-11-23 22:13:26,870 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2019-11-23 22:13:26,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:26,870 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-11-23 22:13:26,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 22:13:26,870 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-11-23 22:13:26,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 22:13:26,870 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:26,871 INFO L410 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:27,074 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:27,074 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:27,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:27,075 INFO L82 PathProgramCache]: Analyzing trace with hash 49071435, now seen corresponding path program 38 times [2019-11-23 22:13:27,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:27,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483819095] [2019-11-23 22:13:27,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:27,082 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:27,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197615575] [2019-11-23 22:13:27,082 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:27,149 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:13:27,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:27,152 WARN L253 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 163 conjunts are in the unsatisfiable core [2019-11-23 22:13:27,153 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:27,994 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,037 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:28,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483819095] [2019-11-23 22:13:28,037 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:28,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197615575] [2019-11-23 22:13:28,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:28,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2019-11-23 22:13:28,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37697583] [2019-11-23 22:13:28,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 22:13:28,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:28,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 22:13:28,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:13:28,039 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 42 states. [2019-11-23 22:13:29,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:29,219 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2019-11-23 22:13:29,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 22:13:29,219 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2019-11-23 22:13:29,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:29,220 INFO L225 Difference]: With dead ends: 50 [2019-11-23 22:13:29,220 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 22:13:29,222 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:13:29,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 22:13:29,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-23 22:13:29,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 22:13:29,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2019-11-23 22:13:29,226 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2019-11-23 22:13:29,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:29,227 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2019-11-23 22:13:29,227 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 22:13:29,227 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2019-11-23 22:13:29,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 22:13:29,227 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:29,227 INFO L410 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:29,428 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:29,428 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:29,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:29,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1521152011, now seen corresponding path program 39 times [2019-11-23 22:13:29,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:29,429 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954582400] [2019-11-23 22:13:29,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:29,437 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:29,437 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445368509] [2019-11-23 22:13:29,437 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:30,711 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-11-23 22:13:30,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:30,714 WARN L253 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 167 conjunts are in the unsatisfiable core [2019-11-23 22:13:30,715 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:31,608 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:31,653 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:31,653 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954582400] [2019-11-23 22:13:31,653 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:31,653 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445368509] [2019-11-23 22:13:31,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:31,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2019-11-23 22:13:31,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445429506] [2019-11-23 22:13:31,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 22:13:31,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:31,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 22:13:31,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:13:31,655 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 43 states. [2019-11-23 22:13:32,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:32,935 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-11-23 22:13:32,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 22:13:32,935 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2019-11-23 22:13:32,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:32,936 INFO L225 Difference]: With dead ends: 51 [2019-11-23 22:13:32,936 INFO L226 Difference]: Without dead ends: 48 [2019-11-23 22:13:32,937 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=1805, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 22:13:32,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-23 22:13:32,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-11-23 22:13:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 22:13:32,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-11-23 22:13:32,941 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2019-11-23 22:13:32,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:32,941 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-11-23 22:13:32,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 22:13:32,943 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-11-23 22:13:32,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 22:13:32,943 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:32,943 INFO L410 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:33,146 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:33,147 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:33,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:33,147 INFO L82 PathProgramCache]: Analyzing trace with hash -88990389, now seen corresponding path program 40 times [2019-11-23 22:13:33,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:33,148 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433672401] [2019-11-23 22:13:33,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:33,155 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:33,155 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820381946] [2019-11-23 22:13:33,156 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:33,552 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:13:33,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:33,555 WARN L253 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 171 conjunts are in the unsatisfiable core [2019-11-23 22:13:33,557 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:34,451 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:34,493 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:34,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433672401] [2019-11-23 22:13:34,493 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:34,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820381946] [2019-11-23 22:13:34,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:34,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2019-11-23 22:13:34,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410137421] [2019-11-23 22:13:34,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 22:13:34,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:34,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 22:13:34,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 22:13:34,495 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 44 states. [2019-11-23 22:13:35,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:35,846 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2019-11-23 22:13:35,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 22:13:35,846 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2019-11-23 22:13:35,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:35,847 INFO L225 Difference]: With dead ends: 52 [2019-11-23 22:13:35,847 INFO L226 Difference]: Without dead ends: 49 [2019-11-23 22:13:35,848 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 22:13:35,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-23 22:13:35,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-11-23 22:13:35,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 22:13:35,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-11-23 22:13:35,854 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2019-11-23 22:13:35,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:35,854 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-11-23 22:13:35,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 22:13:35,854 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-11-23 22:13:35,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-23 22:13:35,855 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:35,855 INFO L410 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:36,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:36,059 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:36,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:36,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1536202763, now seen corresponding path program 41 times [2019-11-23 22:13:36,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:36,059 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408010830] [2019-11-23 22:13:36,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:36,066 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:36,067 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1766163172] [2019-11-23 22:13:36,067 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:36,212 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-11-23 22:13:36,213 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:36,220 WARN L253 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 175 conjunts are in the unsatisfiable core [2019-11-23 22:13:36,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:37,443 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:37,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408010830] [2019-11-23 22:13:37,492 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:37,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766163172] [2019-11-23 22:13:37,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:37,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2019-11-23 22:13:37,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453358361] [2019-11-23 22:13:37,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-23 22:13:37,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:37,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-23 22:13:37,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 22:13:37,494 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 45 states. [2019-11-23 22:13:38,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:38,941 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2019-11-23 22:13:38,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-23 22:13:38,941 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 48 [2019-11-23 22:13:38,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:38,942 INFO L225 Difference]: With dead ends: 53 [2019-11-23 22:13:38,942 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 22:13:38,943 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 22:13:38,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 22:13:38,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-23 22:13:38,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 22:13:38,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2019-11-23 22:13:38,949 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2019-11-23 22:13:38,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:38,949 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2019-11-23 22:13:38,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-23 22:13:38,949 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2019-11-23 22:13:38,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 22:13:38,949 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:38,950 INFO L410 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:39,151 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:39,151 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:39,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:39,152 INFO L82 PathProgramCache]: Analyzing trace with hash 377582923, now seen corresponding path program 42 times [2019-11-23 22:13:39,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:39,153 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146254697] [2019-11-23 22:13:39,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:39,162 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:39,162 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786590199] [2019-11-23 22:13:39,162 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:39,597 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2019-11-23 22:13:39,597 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:39,603 WARN L253 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 179 conjunts are in the unsatisfiable core [2019-11-23 22:13:39,604 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:40,618 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:40,669 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:40,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146254697] [2019-11-23 22:13:40,670 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:40,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786590199] [2019-11-23 22:13:40,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:40,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2019-11-23 22:13:40,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209458202] [2019-11-23 22:13:40,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-23 22:13:40,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:40,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-23 22:13:40,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 22:13:40,671 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 46 states. [2019-11-23 22:13:42,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:42,155 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-11-23 22:13:42,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-23 22:13:42,155 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 49 [2019-11-23 22:13:42,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:42,156 INFO L225 Difference]: With dead ends: 54 [2019-11-23 22:13:42,156 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 22:13:42,157 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=2069, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 22:13:42,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 22:13:42,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-11-23 22:13:42,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-23 22:13:42,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2019-11-23 22:13:42,163 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2019-11-23 22:13:42,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:42,163 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2019-11-23 22:13:42,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-23 22:13:42,163 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2019-11-23 22:13:42,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 22:13:42,164 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:42,164 INFO L410 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:42,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:42,367 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:42,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:42,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1179893749, now seen corresponding path program 43 times [2019-11-23 22:13:42,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:42,369 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109463674] [2019-11-23 22:13:42,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:42,377 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:42,377 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821143941] [2019-11-23 22:13:42,377 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:42,468 WARN L253 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 183 conjunts are in the unsatisfiable core [2019-11-23 22:13:42,470 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:43,550 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:43,596 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109463674] [2019-11-23 22:13:43,596 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:43,596 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821143941] [2019-11-23 22:13:43,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:43,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2019-11-23 22:13:43,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923948528] [2019-11-23 22:13:43,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 22:13:43,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:43,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 22:13:43,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 22:13:43,598 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 47 states. [2019-11-23 22:13:45,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:45,102 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2019-11-23 22:13:45,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 22:13:45,102 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 50 [2019-11-23 22:13:45,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:45,103 INFO L225 Difference]: With dead ends: 55 [2019-11-23 22:13:45,103 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 22:13:45,104 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 22:13:45,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 22:13:45,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-23 22:13:45,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-23 22:13:45,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2019-11-23 22:13:45,111 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2019-11-23 22:13:45,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:45,111 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2019-11-23 22:13:45,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 22:13:45,111 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2019-11-23 22:13:45,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 22:13:45,112 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:45,112 INFO L410 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:45,315 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:45,315 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:45,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:45,316 INFO L82 PathProgramCache]: Analyzing trace with hash 2077936971, now seen corresponding path program 44 times [2019-11-23 22:13:45,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:45,317 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015168775] [2019-11-23 22:13:45,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:45,325 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:45,325 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2048440467] [2019-11-23 22:13:45,326 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:45,431 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:13:45,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:45,434 WARN L253 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 187 conjunts are in the unsatisfiable core [2019-11-23 22:13:45,435 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:46,704 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:46,754 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015168775] [2019-11-23 22:13:46,754 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:46,755 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048440467] [2019-11-23 22:13:46,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:46,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2019-11-23 22:13:46,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231531523] [2019-11-23 22:13:46,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-23 22:13:46,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:46,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-23 22:13:46,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 22:13:46,756 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 48 states. [2019-11-23 22:13:48,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:48,317 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2019-11-23 22:13:48,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-11-23 22:13:48,318 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 51 [2019-11-23 22:13:48,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:48,319 INFO L225 Difference]: With dead ends: 56 [2019-11-23 22:13:48,319 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 22:13:48,320 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 22:13:48,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 22:13:48,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-23 22:13:48,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 22:13:48,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2019-11-23 22:13:48,324 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2019-11-23 22:13:48,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:48,324 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2019-11-23 22:13:48,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-23 22:13:48,324 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2019-11-23 22:13:48,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 22:13:48,325 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:48,325 INFO L410 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:48,525 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:48,525 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:48,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:48,526 INFO L82 PathProgramCache]: Analyzing trace with hash -8525813, now seen corresponding path program 45 times [2019-11-23 22:13:48,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:48,526 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780741681] [2019-11-23 22:13:48,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:48,535 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:48,535 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974276726] [2019-11-23 22:13:48,535 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:50,946 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-11-23 22:13:50,946 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:50,949 WARN L253 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 191 conjunts are in the unsatisfiable core [2019-11-23 22:13:50,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:52,081 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:52,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780741681] [2019-11-23 22:13:52,166 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:52,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974276726] [2019-11-23 22:13:52,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:52,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2019-11-23 22:13:52,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549955120] [2019-11-23 22:13:52,167 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 22:13:52,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:52,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 22:13:52,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 22:13:52,168 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 49 states. [2019-11-23 22:13:54,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:54,036 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2019-11-23 22:13:54,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-23 22:13:54,036 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 52 [2019-11-23 22:13:54,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:54,037 INFO L225 Difference]: With dead ends: 57 [2019-11-23 22:13:54,037 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 22:13:54,038 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 22:13:54,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 22:13:54,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-11-23 22:13:54,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 22:13:54,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2019-11-23 22:13:54,044 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2019-11-23 22:13:54,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:54,044 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2019-11-23 22:13:54,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 22:13:54,044 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2019-11-23 22:13:54,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 22:13:54,045 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:54,045 INFO L410 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:54,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:54,245 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:54,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:54,246 INFO L82 PathProgramCache]: Analyzing trace with hash -264362677, now seen corresponding path program 46 times [2019-11-23 22:13:54,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:54,246 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644265379] [2019-11-23 22:13:54,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:54,254 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:54,254 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [266363629] [2019-11-23 22:13:54,254 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:54,704 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:13:54,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:54,708 WARN L253 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 195 conjunts are in the unsatisfiable core [2019-11-23 22:13:54,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:55,876 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:55,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644265379] [2019-11-23 22:13:55,930 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:55,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266363629] [2019-11-23 22:13:55,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:55,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2019-11-23 22:13:55,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762000348] [2019-11-23 22:13:55,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-11-23 22:13:55,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:55,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-11-23 22:13:55,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 22:13:55,931 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 50 states. [2019-11-23 22:13:57,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:57,664 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2019-11-23 22:13:57,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-11-23 22:13:57,665 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 53 [2019-11-23 22:13:57,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:57,665 INFO L225 Difference]: With dead ends: 58 [2019-11-23 22:13:57,666 INFO L226 Difference]: Without dead ends: 55 [2019-11-23 22:13:57,666 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=2449, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 22:13:57,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-23 22:13:57,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-11-23 22:13:57,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-23 22:13:57,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2019-11-23 22:13:57,671 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2019-11-23 22:13:57,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:57,672 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2019-11-23 22:13:57,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-11-23 22:13:57,672 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2019-11-23 22:13:57,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 22:13:57,672 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:57,672 INFO L410 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:57,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:57,874 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:57,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:57,875 INFO L82 PathProgramCache]: Analyzing trace with hash 394629131, now seen corresponding path program 47 times [2019-11-23 22:13:57,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:57,876 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579826895] [2019-11-23 22:13:57,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:57,882 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:57,882 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026667988] [2019-11-23 22:13:57,882 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:58,013 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-11-23 22:13:58,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:58,016 WARN L253 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 199 conjunts are in the unsatisfiable core [2019-11-23 22:13:58,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:59,282 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:59,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:59,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579826895] [2019-11-23 22:13:59,333 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:59,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026667988] [2019-11-23 22:13:59,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:59,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2019-11-23 22:13:59,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827229085] [2019-11-23 22:13:59,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 22:13:59,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:59,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 22:13:59,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 22:13:59,335 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 51 states. [2019-11-23 22:14:01,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:01,132 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2019-11-23 22:14:01,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-11-23 22:14:01,132 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 54 [2019-11-23 22:14:01,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:01,133 INFO L225 Difference]: With dead ends: 59 [2019-11-23 22:14:01,133 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 22:14:01,134 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 22:14:01,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 22:14:01,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-23 22:14:01,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 22:14:01,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2019-11-23 22:14:01,140 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2019-11-23 22:14:01,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:01,141 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2019-11-23 22:14:01,141 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 22:14:01,141 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2019-11-23 22:14:01,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 22:14:01,141 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:01,142 INFO L410 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:01,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:01,346 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:01,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:01,346 INFO L82 PathProgramCache]: Analyzing trace with hash -651461301, now seen corresponding path program 48 times [2019-11-23 22:14:01,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:01,347 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866822977] [2019-11-23 22:14:01,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:01,355 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:14:01,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741529451] [2019-11-23 22:14:01,356 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:01,974 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-11-23 22:14:01,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:14:01,983 WARN L253 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 203 conjunts are in the unsatisfiable core [2019-11-23 22:14:01,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:03,270 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:03,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:03,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866822977] [2019-11-23 22:14:03,323 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:14:03,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741529451] [2019-11-23 22:14:03,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:14:03,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2019-11-23 22:14:03,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967823876] [2019-11-23 22:14:03,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-11-23 22:14:03,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:03,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-11-23 22:14:03,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 22:14:03,325 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 52 states. [2019-11-23 22:14:05,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:05,212 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2019-11-23 22:14:05,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-11-23 22:14:05,213 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 55 [2019-11-23 22:14:05,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:05,214 INFO L225 Difference]: With dead ends: 60 [2019-11-23 22:14:05,214 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 22:14:05,215 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 22:14:05,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 22:14:05,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-11-23 22:14:05,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-23 22:14:05,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-11-23 22:14:05,221 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2019-11-23 22:14:05,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:05,221 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-11-23 22:14:05,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-11-23 22:14:05,221 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-11-23 22:14:05,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 22:14:05,222 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:05,222 INFO L410 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:05,424 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:05,424 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:05,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:05,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1279473675, now seen corresponding path program 49 times [2019-11-23 22:14:05,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:05,425 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861136763] [2019-11-23 22:14:05,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:05,434 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:14:05,434 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068708578] [2019-11-23 22:14:05,435 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:05,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:05,541 WARN L253 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 207 conjunts are in the unsatisfiable core [2019-11-23 22:14:05,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:06,832 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:06,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861136763] [2019-11-23 22:14:06,882 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:14:06,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068708578] [2019-11-23 22:14:06,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:14:06,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2019-11-23 22:14:06,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036007484] [2019-11-23 22:14:06,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-11-23 22:14:06,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:06,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-11-23 22:14:06,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 22:14:06,883 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 53 states. [2019-11-23 22:14:08,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:08,762 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2019-11-23 22:14:08,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-11-23 22:14:08,763 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 56 [2019-11-23 22:14:08,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:08,763 INFO L225 Difference]: With dead ends: 61 [2019-11-23 22:14:08,764 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 22:14:08,764 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2019-11-23 22:14:08,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 22:14:08,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-23 22:14:08,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 22:14:08,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2019-11-23 22:14:08,771 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2019-11-23 22:14:08,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:08,772 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2019-11-23 22:14:08,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-11-23 22:14:08,772 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2019-11-23 22:14:08,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 22:14:08,772 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:08,772 INFO L410 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:08,976 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:08,976 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:08,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:08,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1008915787, now seen corresponding path program 50 times [2019-11-23 22:14:08,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:08,977 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285504647] [2019-11-23 22:14:08,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:08,985 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:14:08,986 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941381005] [2019-11-23 22:14:08,986 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:09,091 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:14:09,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:14:09,095 WARN L253 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 211 conjunts are in the unsatisfiable core [2019-11-23 22:14:09,096 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:10,511 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:10,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:10,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285504647] [2019-11-23 22:14:10,567 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:14:10,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941381005] [2019-11-23 22:14:10,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:14:10,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2019-11-23 22:14:10,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109620496] [2019-11-23 22:14:10,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-11-23 22:14:10,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:10,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-11-23 22:14:10,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2019-11-23 22:14:10,569 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 54 states. [2019-11-23 22:14:12,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:12,547 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2019-11-23 22:14:12,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-11-23 22:14:12,548 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 57 [2019-11-23 22:14:12,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:12,549 INFO L225 Difference]: With dead ends: 62 [2019-11-23 22:14:12,549 INFO L226 Difference]: Without dead ends: 59 [2019-11-23 22:14:12,550 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 22:14:12,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-23 22:14:12,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-11-23 22:14:12,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 22:14:12,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2019-11-23 22:14:12,556 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2019-11-23 22:14:12,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:12,556 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2019-11-23 22:14:12,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-11-23 22:14:12,556 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2019-11-23 22:14:12,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-23 22:14:12,557 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:12,557 INFO L410 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:12,760 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:12,760 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:12,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:12,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1211555851, now seen corresponding path program 51 times [2019-11-23 22:14:12,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:12,761 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368981802] [2019-11-23 22:14:12,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:12,770 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:14:12,770 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131133895] [2019-11-23 22:14:12,770 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:16,782 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2019-11-23 22:14:16,782 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:14:16,786 WARN L253 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 215 conjunts are in the unsatisfiable core [2019-11-23 22:14:16,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:18,201 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:18,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368981802] [2019-11-23 22:14:18,276 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:14:18,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131133895] [2019-11-23 22:14:18,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:14:18,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2019-11-23 22:14:18,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342293474] [2019-11-23 22:14:18,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-11-23 22:14:18,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:18,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-11-23 22:14:18,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 22:14:18,277 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 55 states. [2019-11-23 22:14:20,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:20,336 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2019-11-23 22:14:20,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-11-23 22:14:20,336 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 58 [2019-11-23 22:14:20,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:20,337 INFO L225 Difference]: With dead ends: 63 [2019-11-23 22:14:20,337 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 22:14:20,338 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 22:14:20,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 22:14:20,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-11-23 22:14:20,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-23 22:14:20,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2019-11-23 22:14:20,343 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2019-11-23 22:14:20,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:20,343 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2019-11-23 22:14:20,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-11-23 22:14:20,344 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2019-11-23 22:14:20,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 22:14:20,344 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:20,344 INFO L410 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:20,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:20,548 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:20,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:20,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1096536757, now seen corresponding path program 52 times [2019-11-23 22:14:20,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:20,549 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383336186] [2019-11-23 22:14:20,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:20,556 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:14:20,557 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796735808] [2019-11-23 22:14:20,557 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:21,129 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:14:21,129 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:14:21,133 WARN L253 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 219 conjunts are in the unsatisfiable core [2019-11-23 22:14:21,135 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:22,640 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:22,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:22,704 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383336186] [2019-11-23 22:14:22,704 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:14:22,704 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796735808] [2019-11-23 22:14:22,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:14:22,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2019-11-23 22:14:22,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235804155] [2019-11-23 22:14:22,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-11-23 22:14:22,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:22,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-11-23 22:14:22,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 22:14:22,705 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 56 states. [2019-11-23 22:14:24,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:24,870 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2019-11-23 22:14:24,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-11-23 22:14:24,871 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 59 [2019-11-23 22:14:24,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:24,872 INFO L225 Difference]: With dead ends: 64 [2019-11-23 22:14:24,872 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 22:14:24,872 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2019-11-23 22:14:24,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 22:14:24,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-11-23 22:14:24,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-23 22:14:24,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2019-11-23 22:14:24,878 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2019-11-23 22:14:24,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:24,878 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2019-11-23 22:14:24,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-11-23 22:14:24,878 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2019-11-23 22:14:24,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 22:14:24,879 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:24,879 INFO L410 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:25,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:25,080 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:25,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:25,080 INFO L82 PathProgramCache]: Analyzing trace with hash 367036427, now seen corresponding path program 53 times [2019-11-23 22:14:25,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:25,081 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958230326] [2019-11-23 22:14:25,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:25,089 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:14:25,089 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341226200] [2019-11-23 22:14:25,089 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:25,337 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2019-11-23 22:14:25,338 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:14:25,343 WARN L253 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 223 conjunts are in the unsatisfiable core [2019-11-23 22:14:25,344 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:26,854 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:26,914 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958230326] [2019-11-23 22:14:26,915 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:14:26,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341226200] [2019-11-23 22:14:26,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:14:26,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2019-11-23 22:14:26,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274095279] [2019-11-23 22:14:26,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-11-23 22:14:26,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:26,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-11-23 22:14:26,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2019-11-23 22:14:26,916 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 57 states.