/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/reducercommutativity/rangesum20.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:26:47,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:26:47,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:26:47,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:26:47,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:26:47,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:26:47,194 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:26:47,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:26:47,209 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:26:47,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:26:47,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:26:47,215 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:26:47,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:26:47,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:26:47,219 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:26:47,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:26:47,221 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:26:47,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:26:47,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:26:47,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:26:47,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:26:47,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:26:47,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:26:47,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:26:47,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:26:47,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:26:47,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:26:47,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:26:47,255 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 22:26:47,290 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:26:47,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:26:47,295 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:26:47,295 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:26:47,295 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:26:47,296 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:26:47,296 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:26:47,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:26:47,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:26:47,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:26:47,297 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:26:47,299 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:26:47,299 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:26:47,299 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:26:47,300 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:26:47,300 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:26:47,300 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:26:47,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:26:47,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:26:47,300 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:26:47,301 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:26:47,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:26:47,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:26:47,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:26:47,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:26:47,302 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:26:47,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:26:47,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:26:47,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:26:47,302 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:26:47,595 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:26:47,608 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:26:47,613 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:26:47,615 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:26:47,616 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:26:47,617 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum20.i [2019-11-23 22:26:47,688 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0fc3d034/a5196cdbc4584a0a93256794ceafe2d3/FLAG161c7b905 [2019-11-23 22:26:48,159 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:26:48,160 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum20.i [2019-11-23 22:26:48,167 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0fc3d034/a5196cdbc4584a0a93256794ceafe2d3/FLAG161c7b905 [2019-11-23 22:26:48,570 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0fc3d034/a5196cdbc4584a0a93256794ceafe2d3 [2019-11-23 22:26:48,579 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:26:48,581 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:26:48,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:26:48,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:26:48,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:26:48,586 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:26:48" (1/1) ... [2019-11-23 22:26:48,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a74ba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:48, skipping insertion in model container [2019-11-23 22:26:48,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:26:48" (1/1) ... [2019-11-23 22:26:48,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:26:48,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:26:48,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:26:48,807 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:26:48,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:26:48,848 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:26:48,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:48 WrapperNode [2019-11-23 22:26:48,848 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:26:48,849 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:26:48,849 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:26:48,849 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:26:48,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:48" (1/1) ... [2019-11-23 22:26:48,948 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:48" (1/1) ... [2019-11-23 22:26:48,982 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:26:48,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:26:48,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:26:48,983 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:26:48,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:48" (1/1) ... [2019-11-23 22:26:48,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:48" (1/1) ... [2019-11-23 22:26:48,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:48" (1/1) ... [2019-11-23 22:26:48,998 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:48" (1/1) ... [2019-11-23 22:26:49,006 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:48" (1/1) ... [2019-11-23 22:26:49,012 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:48" (1/1) ... [2019-11-23 22:26:49,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:48" (1/1) ... [2019-11-23 22:26:49,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:26:49,018 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:26:49,018 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:26:49,018 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:26:49,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:48" (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 22:26:49,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:26:49,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:26:49,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:26:49,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:26:49,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:26:49,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:26:49,444 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:26:49,444 INFO L284 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-23 22:26:49,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:26:49 BoogieIcfgContainer [2019-11-23 22:26:49,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:26:49,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:26:49,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:26:49,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:26:49,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:26:48" (1/3) ... [2019-11-23 22:26:49,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@501ef6a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:26:49, skipping insertion in model container [2019-11-23 22:26:49,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:48" (2/3) ... [2019-11-23 22:26:49,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@501ef6a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:26:49, skipping insertion in model container [2019-11-23 22:26:49,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:26:49" (3/3) ... [2019-11-23 22:26:49,453 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum20.i [2019-11-23 22:26:49,468 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:26:49,478 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:26:49,489 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:26:49,509 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:26:49,510 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:26:49,510 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:26:49,510 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:26:49,510 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:26:49,510 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:26:49,510 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:26:49,511 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:26:49,524 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-11-23 22:26:49,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:26:49,531 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:49,531 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:49,532 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:49,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:49,537 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2019-11-23 22:26:49,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:49,545 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880400718] [2019-11-23 22:26:49,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:49,664 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 22:26:49,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880400718] [2019-11-23 22:26:49,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:26:49,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:26:49,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237340837] [2019-11-23 22:26:49,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 22:26:49,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:49,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 22:26:49,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:26:49,688 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2019-11-23 22:26:49,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:49,705 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2019-11-23 22:26:49,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 22:26:49,706 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-11-23 22:26:49,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:49,715 INFO L225 Difference]: With dead ends: 56 [2019-11-23 22:26:49,715 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 22:26:49,719 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:26:49,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 22:26:49,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-23 22:26:49,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 22:26:49,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2019-11-23 22:26:49,753 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 17 [2019-11-23 22:26:49,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:49,754 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2019-11-23 22:26:49,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 22:26:49,754 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2019-11-23 22:26:49,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:26:49,755 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:49,755 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:49,756 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:49,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:49,756 INFO L82 PathProgramCache]: Analyzing trace with hash 164788593, now seen corresponding path program 1 times [2019-11-23 22:26:49,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:49,757 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49748143] [2019-11-23 22:26:49,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:49,772 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:26:49,773 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952866899] [2019-11-23 22:26:49,773 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 22:26:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:49,850 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 22:26:49,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:49,898 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 22:26:49,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49748143] [2019-11-23 22:26:49,899 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:26:49,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952866899] [2019-11-23 22:26:49,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:26:49,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:26:49,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551895026] [2019-11-23 22:26:49,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:26:49,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:49,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:26:49,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:26:49,905 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 3 states. [2019-11-23 22:26:49,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:49,942 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2019-11-23 22:26:49,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:26:49,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 22:26:49,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:49,946 INFO L225 Difference]: With dead ends: 50 [2019-11-23 22:26:49,946 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 22:26:49,948 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:26:49,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 22:26:49,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-23 22:26:49,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:26:49,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2019-11-23 22:26:49,960 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2019-11-23 22:26:49,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:49,960 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2019-11-23 22:26:49,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:26:49,961 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2019-11-23 22:26:49,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:26:49,963 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:49,963 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:50,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:50,167 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:50,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:50,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2019-11-23 22:26:50,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:50,169 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693933974] [2019-11-23 22:26:50,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:50,188 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:26:50,188 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548517193] [2019-11-23 22:26:50,189 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 22:26:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:50,253 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 22:26:50,255 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:26:50,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693933974] [2019-11-23 22:26:50,265 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:26:50,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548517193] [2019-11-23 22:26:50,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:26:50,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:26:50,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987861557] [2019-11-23 22:26:50,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:26:50,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:50,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:26:50,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:26:50,268 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2019-11-23 22:26:50,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:50,342 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2019-11-23 22:26:50,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:26:50,344 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 22:26:50,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:50,345 INFO L225 Difference]: With dead ends: 57 [2019-11-23 22:26:50,345 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 22:26:50,346 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:26:50,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 22:26:50,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-11-23 22:26:50,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 22:26:50,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2019-11-23 22:26:50,357 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2019-11-23 22:26:50,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:50,358 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2019-11-23 22:26:50,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:26:50,358 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2019-11-23 22:26:50,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 22:26:50,360 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:50,360 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:50,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:50,564 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:50,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:50,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2019-11-23 22:26:50,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:50,566 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352613447] [2019-11-23 22:26:50,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:50,585 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:26:50,585 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151648087] [2019-11-23 22:26:50,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:50,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:26:50,682 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:50,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:26:50,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352613447] [2019-11-23 22:26:50,692 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:26:50,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151648087] [2019-11-23 22:26:50,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:26:50,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:26:50,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742721740] [2019-11-23 22:26:50,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:26:50,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:50,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:26:50,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:26:50,711 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 3 states. [2019-11-23 22:26:50,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:50,790 INFO L93 Difference]: Finished difference Result 75 states and 100 transitions. [2019-11-23 22:26:50,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:26:50,791 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-11-23 22:26:50,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:50,793 INFO L225 Difference]: With dead ends: 75 [2019-11-23 22:26:50,793 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 22:26:50,794 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:26:50,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 22:26:50,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2019-11-23 22:26:50,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 22:26:50,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2019-11-23 22:26:50,811 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 28 [2019-11-23 22:26:50,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:50,812 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2019-11-23 22:26:50,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:26:50,812 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2019-11-23 22:26:50,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 22:26:50,815 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:50,815 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:51,026 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:51,027 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:51,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:51,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1168464304, now seen corresponding path program 1 times [2019-11-23 22:26:51,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:51,028 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918807243] [2019-11-23 22:26:51,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:51,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:51,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 22:26:51,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918807243] [2019-11-23 22:26:51,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:26:51,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:26:51,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347732226] [2019-11-23 22:26:51,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:26:51,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:51,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:26:51,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:26:51,111 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand 4 states. [2019-11-23 22:26:51,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:51,222 INFO L93 Difference]: Finished difference Result 85 states and 118 transitions. [2019-11-23 22:26:51,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:26:51,222 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2019-11-23 22:26:51,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:51,223 INFO L225 Difference]: With dead ends: 85 [2019-11-23 22:26:51,223 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 22:26:51,224 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 22:26:51,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 22:26:51,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2019-11-23 22:26:51,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 22:26:51,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2019-11-23 22:26:51,230 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 28 [2019-11-23 22:26:51,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:51,231 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2019-11-23 22:26:51,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:26:51,231 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2019-11-23 22:26:51,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 22:26:51,232 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:51,232 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:51,232 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:51,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:51,233 INFO L82 PathProgramCache]: Analyzing trace with hash -483510003, now seen corresponding path program 1 times [2019-11-23 22:26:51,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:51,233 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797529894] [2019-11-23 22:26:51,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:51,254 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:26:51,255 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037191192] [2019-11-23 22:26:51,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:51,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 22:26:51,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:51,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 22:26:51,349 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797529894] [2019-11-23 22:26:51,349 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:26:51,349 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037191192] [2019-11-23 22:26:51,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:26:51,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:26:51,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110742491] [2019-11-23 22:26:51,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:26:51,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:51,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:26:51,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:26:51,351 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 3 states. [2019-11-23 22:26:51,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:51,369 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2019-11-23 22:26:51,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:26:51,369 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2019-11-23 22:26:51,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:51,370 INFO L225 Difference]: With dead ends: 54 [2019-11-23 22:26:51,370 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 22:26:51,371 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:26:51,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 22:26:51,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-11-23 22:26:51,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 22:26:51,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2019-11-23 22:26:51,386 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 37 [2019-11-23 22:26:51,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:51,387 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2019-11-23 22:26:51,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:26:51,388 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2019-11-23 22:26:51,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 22:26:51,390 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:51,390 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:51,599 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:51,599 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:51,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:51,600 INFO L82 PathProgramCache]: Analyzing trace with hash -623311861, now seen corresponding path program 1 times [2019-11-23 22:26:51,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:51,601 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765011062] [2019-11-23 22:26:51,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:51,613 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:26:51,613 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919406073] [2019-11-23 22:26:51,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:51,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:51,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:26:51,677 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 22:26:51,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765011062] [2019-11-23 22:26:51,691 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:26:51,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919406073] [2019-11-23 22:26:51,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:26:51,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-23 22:26:51,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162508218] [2019-11-23 22:26:51,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:26:51,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:51,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:26:51,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:26:51,693 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 4 states. [2019-11-23 22:26:51,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:51,715 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2019-11-23 22:26:51,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:26:51,716 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2019-11-23 22:26:51,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:51,717 INFO L225 Difference]: With dead ends: 78 [2019-11-23 22:26:51,717 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 22:26:51,717 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 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 22:26:51,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 22:26:51,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-11-23 22:26:51,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 22:26:51,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2019-11-23 22:26:51,723 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 39 [2019-11-23 22:26:51,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:51,723 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2019-11-23 22:26:51,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:26:51,724 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2019-11-23 22:26:51,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 22:26:51,724 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:51,725 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:51,928 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:51,929 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:51,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:51,929 INFO L82 PathProgramCache]: Analyzing trace with hash -526389047, now seen corresponding path program 2 times [2019-11-23 22:26:51,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:51,930 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061764440] [2019-11-23 22:26:51,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:51,950 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:26:51,950 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284199393] [2019-11-23 22:26:51,951 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 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 22:26:52,008 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:26:52,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:52,010 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:26:52,012 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:52,024 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 22:26:52,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061764440] [2019-11-23 22:26:52,024 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:26:52,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284199393] [2019-11-23 22:26:52,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:26:52,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-23 22:26:52,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978428430] [2019-11-23 22:26:52,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:26:52,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:52,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:26:52,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:26:52,026 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 4 states. [2019-11-23 22:26:52,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:52,082 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2019-11-23 22:26:52,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:26:52,082 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2019-11-23 22:26:52,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:52,083 INFO L225 Difference]: With dead ends: 86 [2019-11-23 22:26:52,083 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 22:26:52,084 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 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 22:26:52,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 22:26:52,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2019-11-23 22:26:52,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-23 22:26:52,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2019-11-23 22:26:52,090 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 41 [2019-11-23 22:26:52,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:52,090 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2019-11-23 22:26:52,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:26:52,091 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2019-11-23 22:26:52,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 22:26:52,092 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:52,092 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:52,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:52,293 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:52,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:52,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1393104750, now seen corresponding path program 3 times [2019-11-23 22:26:52,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:52,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476391420] [2019-11-23 22:26:52,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:52,311 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:26:52,312 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429766729] [2019-11-23 22:26:52,314 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 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 22:26:52,381 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 22:26:52,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:52,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:26:52,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-23 22:26:52,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476391420] [2019-11-23 22:26:52,413 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:26:52,414 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429766729] [2019-11-23 22:26:52,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:26:52,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-23 22:26:52,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587957279] [2019-11-23 22:26:52,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:26:52,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:52,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:26:52,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:26:52,416 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 4 states. [2019-11-23 22:26:52,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:52,444 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2019-11-23 22:26:52,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:26:52,446 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2019-11-23 22:26:52,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:52,447 INFO L225 Difference]: With dead ends: 70 [2019-11-23 22:26:52,448 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 22:26:52,448 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 47 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 22:26:52,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 22:26:52,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-11-23 22:26:52,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 22:26:52,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2019-11-23 22:26:52,462 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 50 [2019-11-23 22:26:52,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:52,463 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2019-11-23 22:26:52,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:26:52,464 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2019-11-23 22:26:52,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 22:26:52,465 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:52,465 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:52,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:52,666 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:52,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:52,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1656359148, now seen corresponding path program 4 times [2019-11-23 22:26:52,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:52,668 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361922167] [2019-11-23 22:26:52,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:52,681 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:26:52,682 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051553551] [2019-11-23 22:26:52,682 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 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 22:26:52,726 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:26:52,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:52,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:26:52,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 22:26:52,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361922167] [2019-11-23 22:26:52,767 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:26:52,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051553551] [2019-11-23 22:26:52,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:26:52,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 22:26:52,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983460552] [2019-11-23 22:26:52,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:26:52,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:52,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:26:52,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:26:52,771 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 5 states. [2019-11-23 22:26:52,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:52,844 INFO L93 Difference]: Finished difference Result 105 states and 127 transitions. [2019-11-23 22:26:52,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:26:52,844 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2019-11-23 22:26:52,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:52,845 INFO L225 Difference]: With dead ends: 105 [2019-11-23 22:26:52,845 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 22:26:52,845 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:26:52,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 22:26:52,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2019-11-23 22:26:52,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 22:26:52,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2019-11-23 22:26:52,852 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 52 [2019-11-23 22:26:52,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:52,852 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2019-11-23 22:26:52,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:26:52,852 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2019-11-23 22:26:52,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 22:26:52,853 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:52,853 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:53,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:53,057 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:53,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:53,058 INFO L82 PathProgramCache]: Analyzing trace with hash -2133276057, now seen corresponding path program 5 times [2019-11-23 22:26:53,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:53,058 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335928801] [2019-11-23 22:26:53,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:53,070 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:26:53,070 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011336457] [2019-11-23 22:26:53,070 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 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 22:26:53,134 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-23 22:26:53,135 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:53,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:26:53,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-23 22:26:53,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335928801] [2019-11-23 22:26:53,177 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:26:53,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011336457] [2019-11-23 22:26:53,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:26:53,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 22:26:53,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824125198] [2019-11-23 22:26:53,178 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:26:53,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:53,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:26:53,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:26:53,179 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 6 states. [2019-11-23 22:26:53,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:53,257 INFO L93 Difference]: Finished difference Result 120 states and 142 transitions. [2019-11-23 22:26:53,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:26:53,258 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2019-11-23 22:26:53,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:53,259 INFO L225 Difference]: With dead ends: 120 [2019-11-23 22:26:53,259 INFO L226 Difference]: Without dead ends: 74 [2019-11-23 22:26:53,260 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:26:53,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-23 22:26:53,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2019-11-23 22:26:53,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-23 22:26:53,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2019-11-23 22:26:53,266 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 61 [2019-11-23 22:26:53,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:53,266 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2019-11-23 22:26:53,266 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:26:53,266 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2019-11-23 22:26:53,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-23 22:26:53,267 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:53,268 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:53,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:53,472 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:53,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:53,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1347737356, now seen corresponding path program 6 times [2019-11-23 22:26:53,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:53,472 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317266581] [2019-11-23 22:26:53,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:53,486 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:26:53,486 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342857263] [2019-11-23 22:26:53,486 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 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 22:26:53,554 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-11-23 22:26:53,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:53,556 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:26:53,558 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:53,585 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2019-11-23 22:26:53,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317266581] [2019-11-23 22:26:53,585 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:26:53,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342857263] [2019-11-23 22:26:53,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:26:53,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:26:53,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257429012] [2019-11-23 22:26:53,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:26:53,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:53,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:26:53,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:26:53,587 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand 4 states. [2019-11-23 22:26:53,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:53,632 INFO L93 Difference]: Finished difference Result 126 states and 145 transitions. [2019-11-23 22:26:53,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:26:53,632 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2019-11-23 22:26:53,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:53,633 INFO L225 Difference]: With dead ends: 126 [2019-11-23 22:26:53,633 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 22:26:53,634 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 67 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 22:26:53,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 22:26:53,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 71. [2019-11-23 22:26:53,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-23 22:26:53,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2019-11-23 22:26:53,649 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 70 [2019-11-23 22:26:53,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:53,649 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2019-11-23 22:26:53,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:26:53,650 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2019-11-23 22:26:53,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-23 22:26:53,651 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:53,652 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:53,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:53,853 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:53,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:53,853 INFO L82 PathProgramCache]: Analyzing trace with hash -838264266, now seen corresponding path program 1 times [2019-11-23 22:26:53,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:53,853 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605956437] [2019-11-23 22:26:53,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:53,865 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:26:53,865 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1763691042] [2019-11-23 22:26:53,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:26:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:53,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:26:53,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:53,946 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-11-23 22:26:53,946 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605956437] [2019-11-23 22:26:53,946 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:26:53,947 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763691042] [2019-11-23 22:26:53,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:26:53,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 22:26:53,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812684539] [2019-11-23 22:26:53,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:26:53,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:53,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:26:53,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:26:53,948 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand 5 states. [2019-11-23 22:26:53,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:53,973 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2019-11-23 22:26:53,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:26:53,974 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2019-11-23 22:26:53,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:53,974 INFO L225 Difference]: With dead ends: 138 [2019-11-23 22:26:53,975 INFO L226 Difference]: Without dead ends: 74 [2019-11-23 22:26:53,975 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:26:53,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-23 22:26:53,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-11-23 22:26:53,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-23 22:26:53,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2019-11-23 22:26:53,986 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 70 [2019-11-23 22:26:53,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:53,986 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2019-11-23 22:26:53,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:26:53,988 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2019-11-23 22:26:53,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-23 22:26:53,989 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:53,989 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:54,198 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:54,198 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:54,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:54,199 INFO L82 PathProgramCache]: Analyzing trace with hash 506729912, now seen corresponding path program 2 times [2019-11-23 22:26:54,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:54,200 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742160640] [2019-11-23 22:26:54,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:54,216 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:26:54,216 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811135548] [2019-11-23 22:26:54,216 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 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 22:26:56,632 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:26:56,632 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:56,633 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:26:56,635 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-11-23 22:26:56,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742160640] [2019-11-23 22:26:56,677 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:26:56,677 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811135548] [2019-11-23 22:26:56,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:26:56,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 22:26:56,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373492738] [2019-11-23 22:26:56,678 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:26:56,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:56,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:26:56,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:26:56,678 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand 6 states. [2019-11-23 22:26:56,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:56,698 INFO L93 Difference]: Finished difference Result 140 states and 154 transitions. [2019-11-23 22:26:56,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:26:56,698 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2019-11-23 22:26:56,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:56,699 INFO L225 Difference]: With dead ends: 140 [2019-11-23 22:26:56,699 INFO L226 Difference]: Without dead ends: 76 [2019-11-23 22:26:56,700 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:26:56,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-23 22:26:56,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-11-23 22:26:56,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-23 22:26:56,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2019-11-23 22:26:56,705 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 72 [2019-11-23 22:26:56,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:56,705 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2019-11-23 22:26:56,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:26:56,706 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2019-11-23 22:26:56,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-23 22:26:56,706 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:56,707 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:56,918 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:56,919 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:56,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:56,919 INFO L82 PathProgramCache]: Analyzing trace with hash 260978874, now seen corresponding path program 3 times [2019-11-23 22:26:56,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:56,919 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175506596] [2019-11-23 22:26:56,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:56,932 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:26:56,932 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143165357] [2019-11-23 22:26:56,932 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 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 22:26:56,995 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 22:26:56,995 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:56,996 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:26:56,998 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-23 22:26:57,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175506596] [2019-11-23 22:26:57,020 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:26:57,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143165357] [2019-11-23 22:26:57,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:26:57,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 22:26:57,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597317730] [2019-11-23 22:26:57,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:26:57,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:57,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:26:57,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:26:57,022 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand 5 states. [2019-11-23 22:26:57,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:57,051 INFO L93 Difference]: Finished difference Result 100 states and 109 transitions. [2019-11-23 22:26:57,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:26:57,051 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2019-11-23 22:26:57,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:57,053 INFO L225 Difference]: With dead ends: 100 [2019-11-23 22:26:57,053 INFO L226 Difference]: Without dead ends: 78 [2019-11-23 22:26:57,054 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:26:57,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-23 22:26:57,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-11-23 22:26:57,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-23 22:26:57,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2019-11-23 22:26:57,059 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 74 [2019-11-23 22:26:57,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:57,059 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2019-11-23 22:26:57,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:26:57,059 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2019-11-23 22:26:57,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-23 22:26:57,060 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:57,060 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:57,264 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:57,264 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:57,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:57,265 INFO L82 PathProgramCache]: Analyzing trace with hash -64859204, now seen corresponding path program 4 times [2019-11-23 22:26:57,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:57,266 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334483129] [2019-11-23 22:26:57,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:57,286 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:26:57,286 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592419919] [2019-11-23 22:26:57,287 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 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 22:26:57,341 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:26:57,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:57,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:26:57,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:57,403 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-11-23 22:26:57,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334483129] [2019-11-23 22:26:57,404 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:26:57,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592419919] [2019-11-23 22:26:57,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:26:57,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 22:26:57,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659323085] [2019-11-23 22:26:57,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:26:57,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:57,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:26:57,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:26:57,406 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand 7 states. [2019-11-23 22:26:57,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:57,494 INFO L93 Difference]: Finished difference Result 143 states and 159 transitions. [2019-11-23 22:26:57,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:26:57,495 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2019-11-23 22:26:57,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:57,495 INFO L225 Difference]: With dead ends: 143 [2019-11-23 22:26:57,495 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 22:26:57,496 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:26:57,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 22:26:57,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2019-11-23 22:26:57,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 22:26:57,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2019-11-23 22:26:57,501 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 76 [2019-11-23 22:26:57,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:57,502 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2019-11-23 22:26:57,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:26:57,502 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2019-11-23 22:26:57,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 22:26:57,503 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:57,503 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:57,705 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:57,706 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:57,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:57,706 INFO L82 PathProgramCache]: Analyzing trace with hash 170985087, now seen corresponding path program 5 times [2019-11-23 22:26:57,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:57,707 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452693412] [2019-11-23 22:26:57,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:57,722 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:26:57,722 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1002977753] [2019-11-23 22:26:57,723 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 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 22:26:57,810 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-23 22:26:57,810 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:57,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:26:57,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:57,869 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-11-23 22:26:57,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452693412] [2019-11-23 22:26:57,870 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:26:57,870 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002977753] [2019-11-23 22:26:57,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:26:57,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 22:26:57,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269363918] [2019-11-23 22:26:57,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:26:57,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:57,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:26:57,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:26:57,871 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand 8 states. [2019-11-23 22:26:57,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:57,999 INFO L93 Difference]: Finished difference Result 158 states and 174 transitions. [2019-11-23 22:26:58,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:26:58,000 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 85 [2019-11-23 22:26:58,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:58,001 INFO L225 Difference]: With dead ends: 158 [2019-11-23 22:26:58,001 INFO L226 Difference]: Without dead ends: 98 [2019-11-23 22:26:58,002 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:26:58,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-23 22:26:58,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2019-11-23 22:26:58,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-23 22:26:58,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2019-11-23 22:26:58,007 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 85 [2019-11-23 22:26:58,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:58,007 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2019-11-23 22:26:58,007 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:26:58,008 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2019-11-23 22:26:58,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-23 22:26:58,008 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:58,009 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:58,212 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:58,212 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:58,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:58,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1105639836, now seen corresponding path program 6 times [2019-11-23 22:26:58,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:58,213 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007835153] [2019-11-23 22:26:58,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:58,224 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:26:58,225 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945799956] [2019-11-23 22:26:58,225 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 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 22:27:14,901 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 22:27:14,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:14,904 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 22:27:14,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2019-11-23 22:27:14,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007835153] [2019-11-23 22:27:14,959 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:14,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945799956] [2019-11-23 22:27:14,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:14,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 22:27:14,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024986819] [2019-11-23 22:27:14,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:27:14,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:14,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:27:14,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:27:14,961 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand 9 states. [2019-11-23 22:27:15,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:15,121 INFO L93 Difference]: Finished difference Result 174 states and 197 transitions. [2019-11-23 22:27:15,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:27:15,121 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 94 [2019-11-23 22:27:15,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:15,124 INFO L225 Difference]: With dead ends: 174 [2019-11-23 22:27:15,124 INFO L226 Difference]: Without dead ends: 113 [2019-11-23 22:27:15,125 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:27:15,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-11-23 22:27:15,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-11-23 22:27:15,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-23 22:27:15,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 126 transitions. [2019-11-23 22:27:15,135 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 126 transitions. Word has length 94 [2019-11-23 22:27:15,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:15,135 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 126 transitions. [2019-11-23 22:27:15,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:27:15,135 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 126 transitions. [2019-11-23 22:27:15,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-23 22:27:15,136 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:15,136 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:15,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:15,337 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:15,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:15,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1021810244, now seen corresponding path program 7 times [2019-11-23 22:27:15,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:15,338 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156696972] [2019-11-23 22:27:15,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:15,350 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:15,351 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959012820] [2019-11-23 22:27:15,351 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 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 22:27:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:15,420 INFO L255 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:27:15,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:15,471 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2019-11-23 22:27:15,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156696972] [2019-11-23 22:27:15,471 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:15,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959012820] [2019-11-23 22:27:15,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:15,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 22:27:15,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124120121] [2019-11-23 22:27:15,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:27:15,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:15,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:27:15,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:27:15,473 INFO L87 Difference]: Start difference. First operand 113 states and 126 transitions. Second operand 7 states. [2019-11-23 22:27:15,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:15,502 INFO L93 Difference]: Finished difference Result 218 states and 244 transitions. [2019-11-23 22:27:15,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:27:15,503 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 112 [2019-11-23 22:27:15,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:15,506 INFO L225 Difference]: With dead ends: 218 [2019-11-23 22:27:15,506 INFO L226 Difference]: Without dead ends: 116 [2019-11-23 22:27:15,507 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:27:15,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-23 22:27:15,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2019-11-23 22:27:15,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-11-23 22:27:15,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 128 transitions. [2019-11-23 22:27:15,513 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 128 transitions. Word has length 112 [2019-11-23 22:27:15,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:15,513 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 128 transitions. [2019-11-23 22:27:15,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:27:15,513 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 128 transitions. [2019-11-23 22:27:15,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-11-23 22:27:15,514 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:15,515 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:15,727 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:15,727 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:15,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:15,727 INFO L82 PathProgramCache]: Analyzing trace with hash -778837314, now seen corresponding path program 8 times [2019-11-23 22:27:15,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:15,728 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935018925] [2019-11-23 22:27:15,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:15,741 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:15,741 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964442513] [2019-11-23 22:27:15,741 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 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 22:27:15,826 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:27:15,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:15,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:27:15,830 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2019-11-23 22:27:15,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935018925] [2019-11-23 22:27:15,892 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:15,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964442513] [2019-11-23 22:27:15,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:15,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 22:27:15,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398434590] [2019-11-23 22:27:15,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:27:15,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:15,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:27:15,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:27:15,894 INFO L87 Difference]: Start difference. First operand 115 states and 128 transitions. Second operand 8 states. [2019-11-23 22:27:15,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:15,920 INFO L93 Difference]: Finished difference Result 220 states and 246 transitions. [2019-11-23 22:27:15,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:27:15,921 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 114 [2019-11-23 22:27:15,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:15,922 INFO L225 Difference]: With dead ends: 220 [2019-11-23 22:27:15,922 INFO L226 Difference]: Without dead ends: 118 [2019-11-23 22:27:15,923 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:27:15,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-11-23 22:27:15,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2019-11-23 22:27:15,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-11-23 22:27:15,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 130 transitions. [2019-11-23 22:27:15,929 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 130 transitions. Word has length 114 [2019-11-23 22:27:15,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:15,929 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 130 transitions. [2019-11-23 22:27:15,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:27:15,929 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 130 transitions. [2019-11-23 22:27:15,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-23 22:27:15,930 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:15,930 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:16,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:16,134 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:16,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:16,135 INFO L82 PathProgramCache]: Analyzing trace with hash 789914432, now seen corresponding path program 9 times [2019-11-23 22:27:16,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:16,135 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405135368] [2019-11-23 22:27:16,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:16,149 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:16,149 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278289156] [2019-11-23 22:27:16,149 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 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 22:27:17,038 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 22:27:17,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:17,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:27:17,042 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:17,068 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2019-11-23 22:27:17,069 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405135368] [2019-11-23 22:27:17,069 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:17,069 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278289156] [2019-11-23 22:27:17,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:17,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 22:27:17,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108313548] [2019-11-23 22:27:17,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:27:17,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:17,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:27:17,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:27:17,071 INFO L87 Difference]: Start difference. First operand 117 states and 130 transitions. Second operand 6 states. [2019-11-23 22:27:17,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:17,098 INFO L93 Difference]: Finished difference Result 154 states and 171 transitions. [2019-11-23 22:27:17,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:27:17,099 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 116 [2019-11-23 22:27:17,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:17,100 INFO L225 Difference]: With dead ends: 154 [2019-11-23 22:27:17,100 INFO L226 Difference]: Without dead ends: 120 [2019-11-23 22:27:17,100 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:27:17,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-11-23 22:27:17,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2019-11-23 22:27:17,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-11-23 22:27:17,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 132 transitions. [2019-11-23 22:27:17,107 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 132 transitions. Word has length 116 [2019-11-23 22:27:17,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:17,108 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 132 transitions. [2019-11-23 22:27:17,108 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:27:17,108 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 132 transitions. [2019-11-23 22:27:17,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-23 22:27:17,109 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:17,110 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:17,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:17,313 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:17,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:17,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1883622974, now seen corresponding path program 10 times [2019-11-23 22:27:17,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:17,314 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691938557] [2019-11-23 22:27:17,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:17,339 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:17,339 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663334537] [2019-11-23 22:27:17,339 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 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 22:27:17,399 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:27:17,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:17,400 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:27:17,402 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 53 proven. 57 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2019-11-23 22:27:17,466 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691938557] [2019-11-23 22:27:17,466 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:17,466 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663334537] [2019-11-23 22:27:17,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:17,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 22:27:17,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340521740] [2019-11-23 22:27:17,467 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:27:17,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:17,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:27:17,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:27:17,468 INFO L87 Difference]: Start difference. First operand 119 states and 132 transitions. Second operand 9 states. [2019-11-23 22:27:17,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:17,585 INFO L93 Difference]: Finished difference Result 217 states and 245 transitions. [2019-11-23 22:27:17,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:27:17,585 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 118 [2019-11-23 22:27:17,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:17,586 INFO L225 Difference]: With dead ends: 217 [2019-11-23 22:27:17,586 INFO L226 Difference]: Without dead ends: 131 [2019-11-23 22:27:17,587 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:27:17,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-11-23 22:27:17,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2019-11-23 22:27:17,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-11-23 22:27:17,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2019-11-23 22:27:17,594 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 118 [2019-11-23 22:27:17,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:17,595 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2019-11-23 22:27:17,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:27:17,595 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2019-11-23 22:27:17,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-23 22:27:17,596 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:17,596 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 7, 7, 7, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:17,797 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:17,797 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:17,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:17,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1634865913, now seen corresponding path program 11 times [2019-11-23 22:27:17,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:17,798 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055389908] [2019-11-23 22:27:17,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:17,809 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:17,809 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877704374] [2019-11-23 22:27:17,809 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 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 22:27:17,930 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-11-23 22:27:17,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:17,931 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:27:17,933 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 61 proven. 77 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2019-11-23 22:27:18,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055389908] [2019-11-23 22:27:18,020 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:18,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877704374] [2019-11-23 22:27:18,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:18,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-23 22:27:18,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502624456] [2019-11-23 22:27:18,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:27:18,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:18,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:27:18,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:27:18,021 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand 10 states. [2019-11-23 22:27:18,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:18,168 INFO L93 Difference]: Finished difference Result 232 states and 260 transitions. [2019-11-23 22:27:18,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:27:18,169 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 127 [2019-11-23 22:27:18,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:18,170 INFO L225 Difference]: With dead ends: 232 [2019-11-23 22:27:18,170 INFO L226 Difference]: Without dead ends: 140 [2019-11-23 22:27:18,171 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:27:18,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-11-23 22:27:18,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2019-11-23 22:27:18,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-11-23 22:27:18,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 150 transitions. [2019-11-23 22:27:18,176 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 150 transitions. Word has length 127 [2019-11-23 22:27:18,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:18,177 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 150 transitions. [2019-11-23 22:27:18,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:27:18,177 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 150 transitions. [2019-11-23 22:27:18,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-23 22:27:18,178 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:18,178 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 8, 8, 8, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:18,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:18,382 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:18,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:18,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1185299746, now seen corresponding path program 12 times [2019-11-23 22:27:18,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:18,383 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291207569] [2019-11-23 22:27:18,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:18,395 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:18,395 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212288824] [2019-11-23 22:27:18,395 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 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 22:27:28,496 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 22:27:28,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:28,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:27:28,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2019-11-23 22:27:28,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291207569] [2019-11-23 22:27:28,564 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:28,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212288824] [2019-11-23 22:27:28,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:28,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 22:27:28,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487609965] [2019-11-23 22:27:28,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:27:28,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:28,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:27:28,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:27:28,566 INFO L87 Difference]: Start difference. First operand 137 states and 150 transitions. Second operand 7 states. [2019-11-23 22:27:28,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:28,590 INFO L93 Difference]: Finished difference Result 180 states and 197 transitions. [2019-11-23 22:27:28,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:27:28,591 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 136 [2019-11-23 22:27:28,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:28,592 INFO L225 Difference]: With dead ends: 180 [2019-11-23 22:27:28,592 INFO L226 Difference]: Without dead ends: 140 [2019-11-23 22:27:28,594 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:27:28,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-11-23 22:27:28,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2019-11-23 22:27:28,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-11-23 22:27:28,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 152 transitions. [2019-11-23 22:27:28,602 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 152 transitions. Word has length 136 [2019-11-23 22:27:28,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:28,602 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 152 transitions. [2019-11-23 22:27:28,602 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:27:28,602 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 152 transitions. [2019-11-23 22:27:28,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-23 22:27:28,603 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:28,603 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 8, 8, 8, 6, 6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:28,804 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:28,804 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:28,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:28,805 INFO L82 PathProgramCache]: Analyzing trace with hash 612643236, now seen corresponding path program 13 times [2019-11-23 22:27:28,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:28,805 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657545055] [2019-11-23 22:27:28,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:28,816 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:28,816 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549223278] [2019-11-23 22:27:28,816 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 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 22:27:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:28,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:27:28,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:28,950 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-11-23 22:27:28,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657545055] [2019-11-23 22:27:28,951 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:28,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549223278] [2019-11-23 22:27:28,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:28,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 22:27:28,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597307940] [2019-11-23 22:27:28,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:27:28,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:28,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:27:28,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:27:28,953 INFO L87 Difference]: Start difference. First operand 139 states and 152 transitions. Second operand 9 states. [2019-11-23 22:27:28,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:28,994 INFO L93 Difference]: Finished difference Result 266 states and 292 transitions. [2019-11-23 22:27:28,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:27:28,995 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 138 [2019-11-23 22:27:28,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:28,996 INFO L225 Difference]: With dead ends: 266 [2019-11-23 22:27:28,996 INFO L226 Difference]: Without dead ends: 142 [2019-11-23 22:27:28,997 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:27:28,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-11-23 22:27:29,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2019-11-23 22:27:29,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-11-23 22:27:29,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 154 transitions. [2019-11-23 22:27:29,017 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 154 transitions. Word has length 138 [2019-11-23 22:27:29,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:29,018 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 154 transitions. [2019-11-23 22:27:29,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:27:29,018 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 154 transitions. [2019-11-23 22:27:29,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-23 22:27:29,018 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:29,019 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 8, 8, 8, 7, 7, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:29,222 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:29,222 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:29,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:29,223 INFO L82 PathProgramCache]: Analyzing trace with hash -2100523994, now seen corresponding path program 14 times [2019-11-23 22:27:29,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:29,223 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689849604] [2019-11-23 22:27:29,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:29,234 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:29,234 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1837661290] [2019-11-23 22:27:29,234 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 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 22:27:29,318 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:27:29,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:29,319 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:27:29,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-11-23 22:27:29,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689849604] [2019-11-23 22:27:29,393 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:29,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837661290] [2019-11-23 22:27:29,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:29,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-23 22:27:29,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986951852] [2019-11-23 22:27:29,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:27:29,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:29,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:27:29,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:27:29,394 INFO L87 Difference]: Start difference. First operand 141 states and 154 transitions. Second operand 10 states. [2019-11-23 22:27:29,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:29,442 INFO L93 Difference]: Finished difference Result 268 states and 294 transitions. [2019-11-23 22:27:29,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:27:29,443 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 140 [2019-11-23 22:27:29,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:29,444 INFO L225 Difference]: With dead ends: 268 [2019-11-23 22:27:29,444 INFO L226 Difference]: Without dead ends: 144 [2019-11-23 22:27:29,444 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:27:29,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-11-23 22:27:29,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2019-11-23 22:27:29,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-11-23 22:27:29,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 156 transitions. [2019-11-23 22:27:29,450 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 156 transitions. Word has length 140 [2019-11-23 22:27:29,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:29,451 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 156 transitions. [2019-11-23 22:27:29,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:27:29,451 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 156 transitions. [2019-11-23 22:27:29,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-23 22:27:29,451 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:29,452 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 8, 8, 8, 8, 8, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:29,655 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:29,656 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:29,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:29,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1885883944, now seen corresponding path program 15 times [2019-11-23 22:27:29,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:29,657 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636338611] [2019-11-23 22:27:29,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:29,668 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:29,668 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851085981] [2019-11-23 22:27:29,668 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 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 22:27:39,235 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 22:27:39,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:39,237 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:27:39,239 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2019-11-23 22:27:39,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636338611] [2019-11-23 22:27:39,276 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:39,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851085981] [2019-11-23 22:27:39,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:39,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 22:27:39,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330421673] [2019-11-23 22:27:39,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:27:39,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:39,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:27:39,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:27:39,277 INFO L87 Difference]: Start difference. First operand 143 states and 156 transitions. Second operand 8 states. [2019-11-23 22:27:39,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:39,307 INFO L93 Difference]: Finished difference Result 186 states and 203 transitions. [2019-11-23 22:27:39,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:27:39,307 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 142 [2019-11-23 22:27:39,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:39,308 INFO L225 Difference]: With dead ends: 186 [2019-11-23 22:27:39,309 INFO L226 Difference]: Without dead ends: 146 [2019-11-23 22:27:39,309 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:27:39,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-11-23 22:27:39,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2019-11-23 22:27:39,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-11-23 22:27:39,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 158 transitions. [2019-11-23 22:27:39,314 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 158 transitions. Word has length 142 [2019-11-23 22:27:39,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:39,315 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 158 transitions. [2019-11-23 22:27:39,315 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:27:39,315 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 158 transitions. [2019-11-23 22:27:39,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-23 22:27:39,316 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:39,316 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 8, 8, 8, 8, 8, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:39,520 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:39,520 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:39,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:39,521 INFO L82 PathProgramCache]: Analyzing trace with hash -435807958, now seen corresponding path program 16 times [2019-11-23 22:27:39,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:39,521 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896332008] [2019-11-23 22:27:39,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:39,531 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:39,531 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748567885] [2019-11-23 22:27:39,532 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 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 22:27:39,585 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:27:39,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:39,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:27:39,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 69 proven. 100 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2019-11-23 22:27:39,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896332008] [2019-11-23 22:27:39,678 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:39,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748567885] [2019-11-23 22:27:39,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:39,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-23 22:27:39,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909517089] [2019-11-23 22:27:39,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:27:39,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:39,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:27:39,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:27:39,679 INFO L87 Difference]: Start difference. First operand 145 states and 158 transitions. Second operand 11 states. [2019-11-23 22:27:39,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:39,845 INFO L93 Difference]: Finished difference Result 259 states and 287 transitions. [2019-11-23 22:27:39,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:27:39,846 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 144 [2019-11-23 22:27:39,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:39,847 INFO L225 Difference]: With dead ends: 259 [2019-11-23 22:27:39,847 INFO L226 Difference]: Without dead ends: 157 [2019-11-23 22:27:39,847 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:27:39,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-11-23 22:27:39,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2019-11-23 22:27:39,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-11-23 22:27:39,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 167 transitions. [2019-11-23 22:27:39,854 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 167 transitions. Word has length 144 [2019-11-23 22:27:39,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:39,854 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 167 transitions. [2019-11-23 22:27:39,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:27:39,854 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 167 transitions. [2019-11-23 22:27:39,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-23 22:27:39,855 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:39,855 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 9, 9, 9, 8, 8, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:40,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:40,056 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:40,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:40,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1911332975, now seen corresponding path program 17 times [2019-11-23 22:27:40,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:40,057 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561565645] [2019-11-23 22:27:40,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:40,076 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:40,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996619328] [2019-11-23 22:27:40,077 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 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 22:27:40,720 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-11-23 22:27:40,720 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:40,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:27:40,725 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:40,794 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 77 proven. 126 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2019-11-23 22:27:40,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561565645] [2019-11-23 22:27:40,794 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:40,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996619328] [2019-11-23 22:27:40,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:40,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-23 22:27:40,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366448755] [2019-11-23 22:27:40,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:27:40,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:40,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:27:40,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:27:40,795 INFO L87 Difference]: Start difference. First operand 154 states and 167 transitions. Second operand 12 states. [2019-11-23 22:27:40,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:40,943 INFO L93 Difference]: Finished difference Result 274 states and 302 transitions. [2019-11-23 22:27:40,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:27:40,943 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 153 [2019-11-23 22:27:40,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:40,945 INFO L225 Difference]: With dead ends: 274 [2019-11-23 22:27:40,945 INFO L226 Difference]: Without dead ends: 166 [2019-11-23 22:27:40,945 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:27:40,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-11-23 22:27:40,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2019-11-23 22:27:40,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-11-23 22:27:40,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 176 transitions. [2019-11-23 22:27:40,953 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 176 transitions. Word has length 153 [2019-11-23 22:27:40,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:40,953 INFO L462 AbstractCegarLoop]: Abstraction has 163 states and 176 transitions. [2019-11-23 22:27:40,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:27:40,954 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 176 transitions. [2019-11-23 22:27:40,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-11-23 22:27:40,955 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:40,955 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 10, 10, 10, 8, 8, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:41,159 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:41,160 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:41,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:41,160 INFO L82 PathProgramCache]: Analyzing trace with hash -74723190, now seen corresponding path program 18 times [2019-11-23 22:27:41,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:41,161 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218954907] [2019-11-23 22:27:41,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:41,172 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:41,172 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572396052] [2019-11-23 22:27:41,172 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 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 22:27:44,382 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 22:27:44,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:44,386 INFO L255 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:27:44,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 106 proven. 15 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2019-11-23 22:27:44,458 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218954907] [2019-11-23 22:27:44,458 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:44,458 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572396052] [2019-11-23 22:27:44,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:44,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 22:27:44,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5822188] [2019-11-23 22:27:44,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:27:44,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:44,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:27:44,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:27:44,460 INFO L87 Difference]: Start difference. First operand 163 states and 176 transitions. Second operand 7 states. [2019-11-23 22:27:44,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:44,539 INFO L93 Difference]: Finished difference Result 281 states and 311 transitions. [2019-11-23 22:27:44,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:27:44,539 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 162 [2019-11-23 22:27:44,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:44,540 INFO L225 Difference]: With dead ends: 281 [2019-11-23 22:27:44,540 INFO L226 Difference]: Without dead ends: 178 [2019-11-23 22:27:44,540 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:27:44,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-11-23 22:27:44,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 172. [2019-11-23 22:27:44,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-11-23 22:27:44,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 188 transitions. [2019-11-23 22:27:44,547 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 188 transitions. Word has length 162 [2019-11-23 22:27:44,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:44,547 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 188 transitions. [2019-11-23 22:27:44,547 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:27:44,547 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 188 transitions. [2019-11-23 22:27:44,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-23 22:27:44,548 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:44,548 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 10, 10, 10, 8, 8, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:44,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:44,754 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:44,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:44,755 INFO L82 PathProgramCache]: Analyzing trace with hash -426743629, now seen corresponding path program 19 times [2019-11-23 22:27:44,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:44,755 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431309483] [2019-11-23 22:27:44,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:44,771 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:44,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313665025] [2019-11-23 22:27:44,772 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 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 22:27:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:44,888 INFO L255 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:27:44,892 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 897 trivial. 0 not checked. [2019-11-23 22:27:45,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431309483] [2019-11-23 22:27:45,027 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:45,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313665025] [2019-11-23 22:27:45,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:45,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-23 22:27:45,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419758550] [2019-11-23 22:27:45,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:27:45,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:45,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:27:45,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:27:45,029 INFO L87 Difference]: Start difference. First operand 172 states and 188 transitions. Second operand 11 states. [2019-11-23 22:27:45,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:45,063 INFO L93 Difference]: Finished difference Result 328 states and 360 transitions. [2019-11-23 22:27:45,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:27:45,064 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 171 [2019-11-23 22:27:45,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:45,065 INFO L225 Difference]: With dead ends: 328 [2019-11-23 22:27:45,065 INFO L226 Difference]: Without dead ends: 175 [2019-11-23 22:27:45,067 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:27:45,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-23 22:27:45,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2019-11-23 22:27:45,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-11-23 22:27:45,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 190 transitions. [2019-11-23 22:27:45,075 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 190 transitions. Word has length 171 [2019-11-23 22:27:45,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:45,075 INFO L462 AbstractCegarLoop]: Abstraction has 174 states and 190 transitions. [2019-11-23 22:27:45,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:27:45,075 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 190 transitions. [2019-11-23 22:27:45,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-23 22:27:45,076 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:45,077 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 10, 10, 10, 9, 9, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:45,282 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:45,282 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:45,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:45,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1503861135, now seen corresponding path program 20 times [2019-11-23 22:27:45,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:45,283 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490225400] [2019-11-23 22:27:45,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:45,294 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:45,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1773346966] [2019-11-23 22:27:45,294 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 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 22:27:45,417 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:27:45,417 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:45,418 INFO L255 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:27:45,420 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 978 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 897 trivial. 0 not checked. [2019-11-23 22:27:45,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490225400] [2019-11-23 22:27:45,540 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:45,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773346966] [2019-11-23 22:27:45,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:45,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-23 22:27:45,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819243803] [2019-11-23 22:27:45,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:27:45,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:45,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:27:45,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:27:45,542 INFO L87 Difference]: Start difference. First operand 174 states and 190 transitions. Second operand 12 states. [2019-11-23 22:27:45,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:45,585 INFO L93 Difference]: Finished difference Result 330 states and 362 transitions. [2019-11-23 22:27:45,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:27:45,586 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 173 [2019-11-23 22:27:45,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:45,587 INFO L225 Difference]: With dead ends: 330 [2019-11-23 22:27:45,587 INFO L226 Difference]: Without dead ends: 177 [2019-11-23 22:27:45,590 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:27:45,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-11-23 22:27:45,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2019-11-23 22:27:45,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-11-23 22:27:45,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 192 transitions. [2019-11-23 22:27:45,599 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 192 transitions. Word has length 173 [2019-11-23 22:27:45,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:45,599 INFO L462 AbstractCegarLoop]: Abstraction has 176 states and 192 transitions. [2019-11-23 22:27:45,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:27:45,599 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 192 transitions. [2019-11-23 22:27:45,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-11-23 22:27:45,600 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:45,600 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 10, 10, 10, 10, 10, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:45,804 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:45,804 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:45,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:45,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1526666065, now seen corresponding path program 21 times [2019-11-23 22:27:45,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:45,805 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727511659] [2019-11-23 22:27:45,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:45,817 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:45,817 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [378793673] [2019-11-23 22:27:45,817 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 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 22:27:47,141 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 22:27:47,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:47,143 INFO L255 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:27:47,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:47,193 INFO L134 CoverageAnalysis]: Checked inductivity of 997 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2019-11-23 22:27:47,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727511659] [2019-11-23 22:27:47,194 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:47,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378793673] [2019-11-23 22:27:47,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:47,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 22:27:47,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016401839] [2019-11-23 22:27:47,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:27:47,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:47,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:27:47,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:27:47,196 INFO L87 Difference]: Start difference. First operand 176 states and 192 transitions. Second operand 9 states. [2019-11-23 22:27:47,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:47,230 INFO L93 Difference]: Finished difference Result 228 states and 249 transitions. [2019-11-23 22:27:47,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:27:47,230 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 175 [2019-11-23 22:27:47,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:47,232 INFO L225 Difference]: With dead ends: 228 [2019-11-23 22:27:47,232 INFO L226 Difference]: Without dead ends: 179 [2019-11-23 22:27:47,232 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:27:47,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-11-23 22:27:47,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2019-11-23 22:27:47,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-11-23 22:27:47,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 194 transitions. [2019-11-23 22:27:47,242 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 194 transitions. Word has length 175 [2019-11-23 22:27:47,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:47,242 INFO L462 AbstractCegarLoop]: Abstraction has 178 states and 194 transitions. [2019-11-23 22:27:47,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:27:47,242 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 194 transitions. [2019-11-23 22:27:47,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-11-23 22:27:47,243 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:47,244 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 10, 10, 10, 10, 10, 7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:47,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:47,448 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:47,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:47,448 INFO L82 PathProgramCache]: Analyzing trace with hash 3164333, now seen corresponding path program 22 times [2019-11-23 22:27:47,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:47,449 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643008725] [2019-11-23 22:27:47,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:47,460 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:47,461 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850728625] [2019-11-23 22:27:47,461 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 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 22:27:47,522 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:27:47,522 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:47,523 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:27:47,525 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:47,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 117 proven. 155 refuted. 0 times theorem prover too weak. 738 trivial. 0 not checked. [2019-11-23 22:27:47,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643008725] [2019-11-23 22:27:47,625 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:47,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850728625] [2019-11-23 22:27:47,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:47,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-23 22:27:47,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090651443] [2019-11-23 22:27:47,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:27:47,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:47,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:27:47,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:27:47,627 INFO L87 Difference]: Start difference. First operand 178 states and 194 transitions. Second operand 13 states. [2019-11-23 22:27:47,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:47,838 INFO L93 Difference]: Finished difference Result 312 states and 346 transitions. [2019-11-23 22:27:47,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:27:47,839 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 177 [2019-11-23 22:27:47,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:47,840 INFO L225 Difference]: With dead ends: 312 [2019-11-23 22:27:47,840 INFO L226 Difference]: Without dead ends: 187 [2019-11-23 22:27:47,841 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:27:47,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-11-23 22:27:47,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2019-11-23 22:27:47,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2019-11-23 22:27:47,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 203 transitions. [2019-11-23 22:27:47,851 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 203 transitions. Word has length 177 [2019-11-23 22:27:47,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:47,851 INFO L462 AbstractCegarLoop]: Abstraction has 187 states and 203 transitions. [2019-11-23 22:27:47,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:27:47,851 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 203 transitions. [2019-11-23 22:27:47,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-11-23 22:27:47,853 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:47,854 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 11, 11, 11, 10, 10, 7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:48,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:48,058 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:48,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:48,058 INFO L82 PathProgramCache]: Analyzing trace with hash 91137718, now seen corresponding path program 23 times [2019-11-23 22:27:48,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:48,058 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90913849] [2019-11-23 22:27:48,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:48,070 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:48,070 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1910343485] [2019-11-23 22:27:48,070 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 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 22:27:49,272 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-11-23 22:27:49,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:49,275 INFO L255 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:27:49,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 173 proven. 100 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2019-11-23 22:27:49,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90913849] [2019-11-23 22:27:49,370 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:49,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910343485] [2019-11-23 22:27:49,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:49,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-23 22:27:49,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796170736] [2019-11-23 22:27:49,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:27:49,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:49,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:27:49,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:27:49,372 INFO L87 Difference]: Start difference. First operand 187 states and 203 transitions. Second operand 12 states. [2019-11-23 22:27:49,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:49,566 INFO L93 Difference]: Finished difference Result 349 states and 405 transitions. [2019-11-23 22:27:49,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:27:49,566 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 186 [2019-11-23 22:27:49,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:49,567 INFO L225 Difference]: With dead ends: 349 [2019-11-23 22:27:49,568 INFO L226 Difference]: Without dead ends: 232 [2019-11-23 22:27:49,568 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:27:49,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2019-11-23 22:27:49,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2019-11-23 22:27:49,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2019-11-23 22:27:49,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 263 transitions. [2019-11-23 22:27:49,576 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 263 transitions. Word has length 186 [2019-11-23 22:27:49,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:49,577 INFO L462 AbstractCegarLoop]: Abstraction has 232 states and 263 transitions. [2019-11-23 22:27:49,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:27:49,577 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 263 transitions. [2019-11-23 22:27:49,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2019-11-23 22:27:49,578 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:49,578 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 11, 11, 11, 10, 10, 9, 9, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:49,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:49,783 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:49,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:49,783 INFO L82 PathProgramCache]: Analyzing trace with hash -661661237, now seen corresponding path program 24 times [2019-11-23 22:27:49,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:49,784 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7087731] [2019-11-23 22:27:49,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:49,796 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:49,796 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1441060210] [2019-11-23 22:27:49,796 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 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 22:27:54,563 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-11-23 22:27:54,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:54,566 INFO L255 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:27:54,568 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1919 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2019-11-23 22:27:54,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7087731] [2019-11-23 22:27:54,701 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:54,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441060210] [2019-11-23 22:27:54,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:54,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-23 22:27:54,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198406430] [2019-11-23 22:27:54,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:27:54,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:54,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:27:54,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:27:54,707 INFO L87 Difference]: Start difference. First operand 232 states and 263 transitions. Second operand 10 states. [2019-11-23 22:27:54,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:54,747 INFO L93 Difference]: Finished difference Result 302 states and 343 transitions. [2019-11-23 22:27:54,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:27:54,747 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 231 [2019-11-23 22:27:54,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:54,749 INFO L225 Difference]: With dead ends: 302 [2019-11-23 22:27:54,750 INFO L226 Difference]: Without dead ends: 235 [2019-11-23 22:27:54,752 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:27:54,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-11-23 22:27:54,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 234. [2019-11-23 22:27:54,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2019-11-23 22:27:54,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 265 transitions. [2019-11-23 22:27:54,761 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 265 transitions. Word has length 231 [2019-11-23 22:27:54,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:54,762 INFO L462 AbstractCegarLoop]: Abstraction has 234 states and 265 transitions. [2019-11-23 22:27:54,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:27:54,762 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 265 transitions. [2019-11-23 22:27:54,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2019-11-23 22:27:54,764 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:54,764 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 11, 11, 11, 10, 10, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:54,970 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:54,970 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:54,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:54,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1607363895, now seen corresponding path program 25 times [2019-11-23 22:27:54,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:54,971 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968980169] [2019-11-23 22:27:54,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:54,988 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:54,988 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388600501] [2019-11-23 22:27:54,988 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 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 22:27:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:55,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:27:55,096 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1934 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1834 trivial. 0 not checked. [2019-11-23 22:27:55,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968980169] [2019-11-23 22:27:55,207 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:55,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388600501] [2019-11-23 22:27:55,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:55,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-23 22:27:55,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365372978] [2019-11-23 22:27:55,208 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:27:55,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:55,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:27:55,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:27:55,209 INFO L87 Difference]: Start difference. First operand 234 states and 265 transitions. Second operand 13 states. [2019-11-23 22:27:55,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:55,252 INFO L93 Difference]: Finished difference Result 448 states and 510 transitions. [2019-11-23 22:27:55,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:27:55,252 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 233 [2019-11-23 22:27:55,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:55,254 INFO L225 Difference]: With dead ends: 448 [2019-11-23 22:27:55,254 INFO L226 Difference]: Without dead ends: 237 [2019-11-23 22:27:55,254 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:27:55,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-11-23 22:27:55,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2019-11-23 22:27:55,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2019-11-23 22:27:55,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 267 transitions. [2019-11-23 22:27:55,262 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 267 transitions. Word has length 233 [2019-11-23 22:27:55,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:55,263 INFO L462 AbstractCegarLoop]: Abstraction has 236 states and 267 transitions. [2019-11-23 22:27:55,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:27:55,263 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 267 transitions. [2019-11-23 22:27:55,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2019-11-23 22:27:55,264 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:55,264 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 11, 11, 11, 11, 11, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:55,468 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:55,468 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:55,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:55,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1528133639, now seen corresponding path program 26 times [2019-11-23 22:27:55,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:55,470 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405043700] [2019-11-23 22:27:55,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:55,482 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:55,482 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2090357709] [2019-11-23 22:27:55,482 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 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 22:27:55,612 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:27:55,612 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:55,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:27:55,617 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:55,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1955 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1834 trivial. 0 not checked. [2019-11-23 22:27:55,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405043700] [2019-11-23 22:27:55,728 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:55,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090357709] [2019-11-23 22:27:55,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:55,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-23 22:27:55,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110360855] [2019-11-23 22:27:55,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:27:55,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:55,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:27:55,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:27:55,729 INFO L87 Difference]: Start difference. First operand 236 states and 267 transitions. Second operand 14 states. [2019-11-23 22:27:55,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:55,778 INFO L93 Difference]: Finished difference Result 450 states and 512 transitions. [2019-11-23 22:27:55,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 22:27:55,778 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 235 [2019-11-23 22:27:55,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:55,779 INFO L225 Difference]: With dead ends: 450 [2019-11-23 22:27:55,780 INFO L226 Difference]: Without dead ends: 239 [2019-11-23 22:27:55,780 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:27:55,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2019-11-23 22:27:55,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2019-11-23 22:27:55,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2019-11-23 22:27:55,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 269 transitions. [2019-11-23 22:27:55,788 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 269 transitions. Word has length 235 [2019-11-23 22:27:55,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:55,788 INFO L462 AbstractCegarLoop]: Abstraction has 238 states and 269 transitions. [2019-11-23 22:27:55,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:27:55,789 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 269 transitions. [2019-11-23 22:27:55,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-11-23 22:27:55,790 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:55,790 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 12, 12, 11, 11, 11, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:55,993 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:55,994 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:55,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:55,994 INFO L82 PathProgramCache]: Analyzing trace with hash -325777979, now seen corresponding path program 27 times [2019-11-23 22:27:55,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:55,994 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331780686] [2019-11-23 22:27:55,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:56,008 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:56,008 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [384684138] [2019-11-23 22:27:56,009 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 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 22:27:57,899 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 22:27:57,899 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:57,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:27:57,904 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:58,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1978 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1914 trivial. 0 not checked. [2019-11-23 22:27:58,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331780686] [2019-11-23 22:27:58,001 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:58,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384684138] [2019-11-23 22:27:58,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:58,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-23 22:27:58,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795568112] [2019-11-23 22:27:58,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:27:58,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:58,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:27:58,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:27:58,003 INFO L87 Difference]: Start difference. First operand 238 states and 269 transitions. Second operand 11 states. [2019-11-23 22:27:58,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:58,038 INFO L93 Difference]: Finished difference Result 308 states and 349 transitions. [2019-11-23 22:27:58,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:27:58,038 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 237 [2019-11-23 22:27:58,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:58,040 INFO L225 Difference]: With dead ends: 308 [2019-11-23 22:27:58,040 INFO L226 Difference]: Without dead ends: 241 [2019-11-23 22:27:58,041 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:27:58,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-11-23 22:27:58,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 240. [2019-11-23 22:27:58,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2019-11-23 22:27:58,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 271 transitions. [2019-11-23 22:27:58,049 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 271 transitions. Word has length 237 [2019-11-23 22:27:58,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:58,050 INFO L462 AbstractCegarLoop]: Abstraction has 240 states and 271 transitions. [2019-11-23 22:27:58,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:27:58,050 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 271 transitions. [2019-11-23 22:27:58,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2019-11-23 22:27:58,051 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:58,051 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 12, 12, 11, 11, 11, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:58,259 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:58,259 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:58,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:58,260 INFO L82 PathProgramCache]: Analyzing trace with hash -946100157, now seen corresponding path program 28 times [2019-11-23 22:27:58,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:58,260 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576607509] [2019-11-23 22:27:58,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:58,273 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:58,273 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346249990] [2019-11-23 22:27:58,273 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 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 22:27:58,378 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:27:58,378 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:58,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:27:58,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:58,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1995 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1851 trivial. 0 not checked. [2019-11-23 22:27:58,534 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576607509] [2019-11-23 22:27:58,534 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:58,534 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346249990] [2019-11-23 22:27:58,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:58,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-11-23 22:27:58,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619586159] [2019-11-23 22:27:58,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:27:58,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:58,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:27:58,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:27:58,537 INFO L87 Difference]: Start difference. First operand 240 states and 271 transitions. Second operand 15 states. [2019-11-23 22:27:58,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:58,584 INFO L93 Difference]: Finished difference Result 456 states and 518 transitions. [2019-11-23 22:27:58,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 22:27:58,585 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 239 [2019-11-23 22:27:58,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:58,586 INFO L225 Difference]: With dead ends: 456 [2019-11-23 22:27:58,586 INFO L226 Difference]: Without dead ends: 243 [2019-11-23 22:27:58,587 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:27:58,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-11-23 22:27:58,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 242. [2019-11-23 22:27:58,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2019-11-23 22:27:58,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 273 transitions. [2019-11-23 22:27:58,595 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 273 transitions. Word has length 239 [2019-11-23 22:27:58,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:58,595 INFO L462 AbstractCegarLoop]: Abstraction has 242 states and 273 transitions. [2019-11-23 22:27:58,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:27:58,596 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 273 transitions. [2019-11-23 22:27:58,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2019-11-23 22:27:58,597 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:58,597 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 13, 13, 11, 11, 11, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:58,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:58,802 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:58,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:58,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1325541121, now seen corresponding path program 29 times [2019-11-23 22:27:58,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:58,802 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771077469] [2019-11-23 22:27:58,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:58,817 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:58,817 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127300312] [2019-11-23 22:27:58,817 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 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 22:28:01,399 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-11-23 22:28:01,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:01,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:28:01,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1939 trivial. 0 not checked. [2019-11-23 22:28:01,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771077469] [2019-11-23 22:28:01,513 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:01,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127300312] [2019-11-23 22:28:01,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:01,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-23 22:28:01,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456517381] [2019-11-23 22:28:01,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:28:01,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:01,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:28:01,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:28:01,514 INFO L87 Difference]: Start difference. First operand 242 states and 273 transitions. Second operand 12 states. [2019-11-23 22:28:01,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:01,548 INFO L93 Difference]: Finished difference Result 312 states and 353 transitions. [2019-11-23 22:28:01,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:28:01,548 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 241 [2019-11-23 22:28:01,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:01,550 INFO L225 Difference]: With dead ends: 312 [2019-11-23 22:28:01,550 INFO L226 Difference]: Without dead ends: 245 [2019-11-23 22:28:01,550 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:28:01,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2019-11-23 22:28:01,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 244. [2019-11-23 22:28:01,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2019-11-23 22:28:01,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 275 transitions. [2019-11-23 22:28:01,557 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 275 transitions. Word has length 241 [2019-11-23 22:28:01,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:01,558 INFO L462 AbstractCegarLoop]: Abstraction has 244 states and 275 transitions. [2019-11-23 22:28:01,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:28:01,558 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 275 transitions. [2019-11-23 22:28:01,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2019-11-23 22:28:01,559 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:01,559 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 13, 13, 11, 11, 11, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:01,766 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:01,766 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:01,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:01,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1128622719, now seen corresponding path program 30 times [2019-11-23 22:28:01,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:01,768 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570432293] [2019-11-23 22:28:01,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:01,780 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:01,781 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40385499] [2019-11-23 22:28:01,781 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 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