/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/array-multidimensional/init-4-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:41:18,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:41:18,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:41:18,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:41:18,955 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:41:18,956 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:41:18,958 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:41:18,959 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:41:18,961 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:41:18,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:41:18,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:41:18,964 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:41:18,964 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:41:18,965 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:41:18,966 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:41:18,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:41:18,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:41:18,969 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:41:18,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:41:18,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:41:18,974 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:41:18,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:41:18,977 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:41:18,977 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:41:18,980 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:41:18,987 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:41:18,988 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:41:18,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:41:18,990 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 20:41:19,010 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:41:19,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:41:19,011 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:41:19,012 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:41:19,012 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:41:19,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:41:19,013 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:41:19,013 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:41:19,013 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:41:19,013 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:41:19,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:41:19,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:41:19,015 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:41:19,015 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:41:19,015 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:41:19,015 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:41:19,016 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:41:19,016 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:41:19,016 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:41:19,016 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:41:19,017 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:41:19,017 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:41:19,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:41:19,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:41:19,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:41:19,018 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:41:19,018 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:41:19,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:41:19,018 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:41:19,019 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:41:19,285 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:41:19,303 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:41:19,306 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:41:19,310 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:41:19,310 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:41:19,311 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/init-4-n-u.c [2019-11-23 20:41:19,381 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9084a7a44/8b956f6524c84fce924c40f5c4bf3b07/FLAG78357b0db [2019-11-23 20:41:19,867 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:41:19,867 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/init-4-n-u.c [2019-11-23 20:41:19,875 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9084a7a44/8b956f6524c84fce924c40f5c4bf3b07/FLAG78357b0db [2019-11-23 20:41:20,341 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9084a7a44/8b956f6524c84fce924c40f5c4bf3b07 [2019-11-23 20:41:20,350 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:41:20,351 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:41:20,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:41:20,352 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:41:20,356 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:41:20,357 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:41:20" (1/1) ... [2019-11-23 20:41:20,360 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19309383 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:20, skipping insertion in model container [2019-11-23 20:41:20,360 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:41:20" (1/1) ... [2019-11-23 20:41:20,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:41:20,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:41:20,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:41:20,560 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:41:20,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:41:20,682 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:41:20,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:20 WrapperNode [2019-11-23 20:41:20,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:41:20,684 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:41:20,684 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:41:20,684 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:41:20,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:20" (1/1) ... [2019-11-23 20:41:20,701 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:20" (1/1) ... [2019-11-23 20:41:20,724 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:41:20,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:41:20,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:41:20,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:41:20,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:20" (1/1) ... [2019-11-23 20:41:20,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:20" (1/1) ... [2019-11-23 20:41:20,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:20" (1/1) ... [2019-11-23 20:41:20,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:20" (1/1) ... [2019-11-23 20:41:20,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:20" (1/1) ... [2019-11-23 20:41:20,746 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:20" (1/1) ... [2019-11-23 20:41:20,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:20" (1/1) ... [2019-11-23 20:41:20,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:41:20,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:41:20,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:41:20,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:41:20,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:20" (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 20:41:20,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:41:20,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:41:20,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:41:20,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:41:20,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:41:20,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:41:21,140 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:41:21,140 INFO L284 CfgBuilder]: Removed 14 assume(true) statements. [2019-11-23 20:41:21,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:41:21 BoogieIcfgContainer [2019-11-23 20:41:21,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:41:21,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:41:21,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:41:21,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:41:21,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:41:20" (1/3) ... [2019-11-23 20:41:21,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64be514b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:41:21, skipping insertion in model container [2019-11-23 20:41:21,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:20" (2/3) ... [2019-11-23 20:41:21,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64be514b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:41:21, skipping insertion in model container [2019-11-23 20:41:21,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:41:21" (3/3) ... [2019-11-23 20:41:21,152 INFO L109 eAbstractionObserver]: Analyzing ICFG init-4-n-u.c [2019-11-23 20:41:21,162 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:41:21,171 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:41:21,183 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:41:21,204 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:41:21,205 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:41:21,205 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:41:21,205 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:41:21,205 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:41:21,205 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:41:21,205 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:41:21,205 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:41:21,218 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-11-23 20:41:21,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:41:21,225 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:21,225 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:21,226 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:21,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:21,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1868122297, now seen corresponding path program 1 times [2019-11-23 20:41:21,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:21,238 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160026140] [2019-11-23 20:41:21,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:21,312 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:21,313 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723489390] [2019-11-23 20:41:21,313 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 20:41:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:41:21,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-23 20:41:21,385 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:21,400 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 20:41:21,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160026140] [2019-11-23 20:41:21,401 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:21,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723489390] [2019-11-23 20:41:21,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:41:21,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:41:21,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141749536] [2019-11-23 20:41:21,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:41:21,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:21,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:41:21,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:41:21,425 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2019-11-23 20:41:21,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:21,447 INFO L93 Difference]: Finished difference Result 48 states and 80 transitions. [2019-11-23 20:41:21,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:41:21,449 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-23 20:41:21,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:21,459 INFO L225 Difference]: With dead ends: 48 [2019-11-23 20:41:21,459 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 20:41:21,463 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 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 20:41:21,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 20:41:21,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-23 20:41:21,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:41:21,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2019-11-23 20:41:21,500 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 10 [2019-11-23 20:41:21,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:21,501 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2019-11-23 20:41:21,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:41:21,501 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2019-11-23 20:41:21,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:41:21,502 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:21,502 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:21,706 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:21,706 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:21,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:21,707 INFO L82 PathProgramCache]: Analyzing trace with hash -58278076, now seen corresponding path program 1 times [2019-11-23 20:41:21,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:21,708 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899838906] [2019-11-23 20:41:21,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:21,714 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:21,715 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [182117813] [2019-11-23 20:41:21,715 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 20:41:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:41:21,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:41:21,765 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:21,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:41:21,814 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899838906] [2019-11-23 20:41:21,814 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:21,814 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182117813] [2019-11-23 20:41:21,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:41:21,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:41:21,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602524108] [2019-11-23 20:41:21,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:41:21,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:21,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:41:21,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:41:21,819 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand 3 states. [2019-11-23 20:41:21,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:21,862 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2019-11-23 20:41:21,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:41:21,863 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:41:21,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:21,864 INFO L225 Difference]: With dead ends: 40 [2019-11-23 20:41:21,864 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 20:41:21,865 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 20:41:21,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 20:41:21,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2019-11-23 20:41:21,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 20:41:21,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2019-11-23 20:41:21,872 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 10 [2019-11-23 20:41:21,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:21,873 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2019-11-23 20:41:21,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:41:21,873 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2019-11-23 20:41:21,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 20:41:21,874 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:21,874 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:22,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:22,078 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:22,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:22,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1196059767, now seen corresponding path program 1 times [2019-11-23 20:41:22,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:22,081 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201534945] [2019-11-23 20:41:22,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:22,089 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:22,090 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697929884] [2019-11-23 20:41:22,090 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 20:41:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:41:22,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:41:22,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:41:22,169 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201534945] [2019-11-23 20:41:22,169 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:22,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697929884] [2019-11-23 20:41:22,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:41:22,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:41:22,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476162013] [2019-11-23 20:41:22,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:41:22,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:22,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:41:22,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:41:22,172 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand 4 states. [2019-11-23 20:41:22,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:22,227 INFO L93 Difference]: Finished difference Result 56 states and 76 transitions. [2019-11-23 20:41:22,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:41:22,228 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-23 20:41:22,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:22,229 INFO L225 Difference]: With dead ends: 56 [2019-11-23 20:41:22,229 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 20:41:22,230 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 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 20:41:22,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 20:41:22,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2019-11-23 20:41:22,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:41:22,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2019-11-23 20:41:22,237 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 13 [2019-11-23 20:41:22,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:22,237 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2019-11-23 20:41:22,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:41:22,238 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2019-11-23 20:41:22,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:41:22,238 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:22,239 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:22,450 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:22,450 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:22,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:22,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1301954304, now seen corresponding path program 1 times [2019-11-23 20:41:22,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:22,452 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145356036] [2019-11-23 20:41:22,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:22,461 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:22,461 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427539717] [2019-11-23 20:41:22,462 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 20:41:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:41:22,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:41:22,519 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:22,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:41:22,546 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145356036] [2019-11-23 20:41:22,551 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:22,551 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427539717] [2019-11-23 20:41:22,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:41:22,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:41:22,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585723975] [2019-11-23 20:41:22,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:41:22,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:22,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:41:22,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:41:22,554 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 4 states. [2019-11-23 20:41:22,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:22,619 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2019-11-23 20:41:22,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:41:22,620 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-11-23 20:41:22,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:22,632 INFO L225 Difference]: With dead ends: 56 [2019-11-23 20:41:22,632 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 20:41:22,632 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 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 20:41:22,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 20:41:22,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2019-11-23 20:41:22,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:41:22,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-23 20:41:22,640 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 16 [2019-11-23 20:41:22,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:22,641 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-23 20:41:22,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:41:22,641 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-23 20:41:22,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:41:22,642 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:22,642 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 20:41:22,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:22,843 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:22,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:22,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1938337909, now seen corresponding path program 1 times [2019-11-23 20:41:22,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:22,844 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411388625] [2019-11-23 20:41:22,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:22,850 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:22,851 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534670479] [2019-11-23 20:41:22,851 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 20:41:22,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:41:22,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:41:22,895 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:41:22,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411388625] [2019-11-23 20:41:22,920 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:22,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534670479] [2019-11-23 20:41:22,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:41:22,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:41:22,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240843704] [2019-11-23 20:41:22,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:41:22,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:22,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:41:22,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:41:22,922 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 4 states. [2019-11-23 20:41:22,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:22,970 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2019-11-23 20:41:22,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:41:22,971 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-23 20:41:22,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:22,971 INFO L225 Difference]: With dead ends: 56 [2019-11-23 20:41:22,972 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 20:41:22,972 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 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 20:41:22,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 20:41:22,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2019-11-23 20:41:22,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:41:22,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2019-11-23 20:41:22,980 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 19 [2019-11-23 20:41:22,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:22,980 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2019-11-23 20:41:22,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:41:22,980 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2019-11-23 20:41:22,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 20:41:22,981 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:22,981 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] [2019-11-23 20:41:23,181 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:23,182 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:23,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:23,182 INFO L82 PathProgramCache]: Analyzing trace with hash 582253679, now seen corresponding path program 1 times [2019-11-23 20:41:23,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:23,183 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839417279] [2019-11-23 20:41:23,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:23,188 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:23,189 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32813610] [2019-11-23 20:41:23,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:41:23,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:41:23,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:41:23,228 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:41:23,251 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839417279] [2019-11-23 20:41:23,251 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:23,251 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32813610] [2019-11-23 20:41:23,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:23,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:41:23,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364335022] [2019-11-23 20:41:23,253 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:41:23,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:23,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:41:23,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:41:23,253 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 5 states. [2019-11-23 20:41:23,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:23,338 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2019-11-23 20:41:23,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:41:23,338 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-11-23 20:41:23,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:23,339 INFO L225 Difference]: With dead ends: 64 [2019-11-23 20:41:23,339 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 20:41:23,340 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 20:41:23,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 20:41:23,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2019-11-23 20:41:23,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:41:23,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2019-11-23 20:41:23,355 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 20 [2019-11-23 20:41:23,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:23,355 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2019-11-23 20:41:23,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:41:23,356 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2019-11-23 20:41:23,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:41:23,358 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:23,358 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:23,571 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:23,572 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:23,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:23,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1411181579, now seen corresponding path program 2 times [2019-11-23 20:41:23,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:23,572 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800881064] [2019-11-23 20:41:23,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:23,577 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:23,577 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [163692637] [2019-11-23 20:41:23,577 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:23,623 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:41:23,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:23,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:41:23,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:23,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:41:23,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800881064] [2019-11-23 20:41:23,661 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:23,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163692637] [2019-11-23 20:41:23,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:23,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 20:41:23,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956914334] [2019-11-23 20:41:23,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:41:23,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:23,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:41:23,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:41:23,664 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 6 states. [2019-11-23 20:41:23,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:23,734 INFO L93 Difference]: Finished difference Result 74 states and 91 transitions. [2019-11-23 20:41:23,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:41:23,736 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-11-23 20:41:23,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:23,737 INFO L225 Difference]: With dead ends: 74 [2019-11-23 20:41:23,737 INFO L226 Difference]: Without dead ends: 45 [2019-11-23 20:41:23,738 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 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 20:41:23,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-23 20:41:23,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2019-11-23 20:41:23,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:41:23,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2019-11-23 20:41:23,749 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 21 [2019-11-23 20:41:23,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:23,752 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2019-11-23 20:41:23,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:41:23,752 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2019-11-23 20:41:23,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 20:41:23,753 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:23,753 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:23,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:23,956 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:23,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:23,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1338142703, now seen corresponding path program 3 times [2019-11-23 20:41:23,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:23,957 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199556143] [2019-11-23 20:41:23,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:23,962 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:23,963 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [643593016] [2019-11-23 20:41:23,963 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 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 20:41:24,009 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:41:24,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:24,010 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:41:24,011 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:41:24,036 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199556143] [2019-11-23 20:41:24,037 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:24,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643593016] [2019-11-23 20:41:24,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:24,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-23 20:41:24,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481449500] [2019-11-23 20:41:24,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:41:24,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:24,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:41:24,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:41:24,044 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 4 states. [2019-11-23 20:41:24,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:24,075 INFO L93 Difference]: Finished difference Result 80 states and 101 transitions. [2019-11-23 20:41:24,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:41:24,076 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-11-23 20:41:24,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:24,077 INFO L225 Difference]: With dead ends: 80 [2019-11-23 20:41:24,077 INFO L226 Difference]: Without dead ends: 59 [2019-11-23 20:41:24,078 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 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 20:41:24,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-23 20:41:24,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2019-11-23 20:41:24,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:41:24,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2019-11-23 20:41:24,087 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 22 [2019-11-23 20:41:24,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:24,087 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2019-11-23 20:41:24,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:41:24,087 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2019-11-23 20:41:24,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 20:41:24,088 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:24,089 INFO L410 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:24,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:24,292 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:24,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:24,293 INFO L82 PathProgramCache]: Analyzing trace with hash 142309402, now seen corresponding path program 4 times [2019-11-23 20:41:24,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:24,293 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794970366] [2019-11-23 20:41:24,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:24,300 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:24,300 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794093230] [2019-11-23 20:41:24,300 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 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 20:41:24,512 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:41:24,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:24,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:41:24,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:24,570 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:41:24,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794970366] [2019-11-23 20:41:24,571 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:24,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794093230] [2019-11-23 20:41:24,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:24,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 20:41:24,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919188692] [2019-11-23 20:41:24,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:41:24,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:24,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:41:24,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:41:24,573 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand 7 states. [2019-11-23 20:41:24,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:24,645 INFO L93 Difference]: Finished difference Result 108 states and 133 transitions. [2019-11-23 20:41:24,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:41:24,646 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2019-11-23 20:41:24,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:24,646 INFO L225 Difference]: With dead ends: 108 [2019-11-23 20:41:24,647 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:41:24,647 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 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 20:41:24,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:41:24,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 53. [2019-11-23 20:41:24,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:41:24,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2019-11-23 20:41:24,660 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 34 [2019-11-23 20:41:24,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:24,661 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2019-11-23 20:41:24,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:41:24,661 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2019-11-23 20:41:24,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 20:41:24,662 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:24,663 INFO L410 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:24,867 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:24,867 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:24,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:24,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1394324828, now seen corresponding path program 5 times [2019-11-23 20:41:24,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:24,869 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236087433] [2019-11-23 20:41:24,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:24,874 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:24,875 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909691075] [2019-11-23 20:41:24,875 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 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 20:41:25,171 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-11-23 20:41:25,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:25,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:41:25,174 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 20:41:25,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236087433] [2019-11-23 20:41:25,209 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:25,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909691075] [2019-11-23 20:41:25,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:25,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:41:25,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433849251] [2019-11-23 20:41:25,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:41:25,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:25,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:41:25,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:41:25,211 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand 5 states. [2019-11-23 20:41:25,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:25,296 INFO L93 Difference]: Finished difference Result 170 states and 214 transitions. [2019-11-23 20:41:25,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:41:25,296 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2019-11-23 20:41:25,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:25,300 INFO L225 Difference]: With dead ends: 170 [2019-11-23 20:41:25,300 INFO L226 Difference]: Without dead ends: 131 [2019-11-23 20:41:25,302 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 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 20:41:25,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-11-23 20:41:25,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 91. [2019-11-23 20:41:25,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-23 20:41:25,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 114 transitions. [2019-11-23 20:41:25,326 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 114 transitions. Word has length 36 [2019-11-23 20:41:25,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:25,326 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 114 transitions. [2019-11-23 20:41:25,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:41:25,326 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 114 transitions. [2019-11-23 20:41:25,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 20:41:25,328 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:25,328 INFO L410 BasicCegarLoop]: trace histogram [16, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:25,532 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:25,533 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:25,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:25,533 INFO L82 PathProgramCache]: Analyzing trace with hash -2103931612, now seen corresponding path program 6 times [2019-11-23 20:41:25,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:25,534 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081157098] [2019-11-23 20:41:25,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:25,540 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:25,540 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092740944] [2019-11-23 20:41:25,540 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 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 20:41:25,592 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-23 20:41:25,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:25,593 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:41:25,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:25,658 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 156 proven. 10 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-11-23 20:41:25,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081157098] [2019-11-23 20:41:25,658 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:25,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092740944] [2019-11-23 20:41:25,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:25,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 20:41:25,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547673679] [2019-11-23 20:41:25,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:41:25,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:25,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:41:25,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:41:25,661 INFO L87 Difference]: Start difference. First operand 91 states and 114 transitions. Second operand 8 states. [2019-11-23 20:41:25,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:25,736 INFO L93 Difference]: Finished difference Result 202 states and 253 transitions. [2019-11-23 20:41:25,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:41:25,737 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2019-11-23 20:41:25,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:25,738 INFO L225 Difference]: With dead ends: 202 [2019-11-23 20:41:25,738 INFO L226 Difference]: Without dead ends: 116 [2019-11-23 20:41:25,739 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 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 20:41:25,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-23 20:41:25,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 101. [2019-11-23 20:41:25,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-23 20:41:25,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 126 transitions. [2019-11-23 20:41:25,753 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 126 transitions. Word has length 56 [2019-11-23 20:41:25,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:25,753 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 126 transitions. [2019-11-23 20:41:25,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:41:25,754 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 126 transitions. [2019-11-23 20:41:25,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 20:41:25,755 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:25,755 INFO L410 BasicCegarLoop]: trace histogram [20, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:25,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:25,967 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:25,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:25,967 INFO L82 PathProgramCache]: Analyzing trace with hash -792203548, now seen corresponding path program 7 times [2019-11-23 20:41:25,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:25,967 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582225411] [2019-11-23 20:41:25,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:25,972 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:25,973 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518959757] [2019-11-23 20:41:25,973 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 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 20:41:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:41:26,055 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:41:26,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:26,134 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 122 proven. 15 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2019-11-23 20:41:26,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582225411] [2019-11-23 20:41:26,136 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:26,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518959757] [2019-11-23 20:41:26,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:26,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 20:41:26,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034080861] [2019-11-23 20:41:26,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:41:26,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:26,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:41:26,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:41:26,140 INFO L87 Difference]: Start difference. First operand 101 states and 126 transitions. Second operand 9 states. [2019-11-23 20:41:26,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:26,221 INFO L93 Difference]: Finished difference Result 224 states and 278 transitions. [2019-11-23 20:41:26,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:41:26,222 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2019-11-23 20:41:26,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:26,223 INFO L225 Difference]: With dead ends: 224 [2019-11-23 20:41:26,223 INFO L226 Difference]: Without dead ends: 128 [2019-11-23 20:41:26,224 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 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 20:41:26,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-11-23 20:41:26,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 111. [2019-11-23 20:41:26,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-11-23 20:41:26,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 138 transitions. [2019-11-23 20:41:26,245 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 138 transitions. Word has length 60 [2019-11-23 20:41:26,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:26,247 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 138 transitions. [2019-11-23 20:41:26,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:41:26,247 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 138 transitions. [2019-11-23 20:41:26,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-23 20:41:26,253 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:26,253 INFO L410 BasicCegarLoop]: trace histogram [24, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:26,463 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:26,463 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:26,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:26,463 INFO L82 PathProgramCache]: Analyzing trace with hash 136272292, now seen corresponding path program 8 times [2019-11-23 20:41:26,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:26,464 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60464755] [2019-11-23 20:41:26,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:26,468 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:26,469 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [722246548] [2019-11-23 20:41:26,469 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 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 20:41:26,535 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:41:26,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:26,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:41:26,539 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:26,633 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 161 proven. 21 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2019-11-23 20:41:26,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60464755] [2019-11-23 20:41:26,634 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:26,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722246548] [2019-11-23 20:41:26,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:26,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-23 20:41:26,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267080913] [2019-11-23 20:41:26,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:41:26,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:26,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:41:26,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:41:26,636 INFO L87 Difference]: Start difference. First operand 111 states and 138 transitions. Second operand 10 states. [2019-11-23 20:41:26,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:26,716 INFO L93 Difference]: Finished difference Result 246 states and 303 transitions. [2019-11-23 20:41:26,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:41:26,717 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2019-11-23 20:41:26,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:26,718 INFO L225 Difference]: With dead ends: 246 [2019-11-23 20:41:26,718 INFO L226 Difference]: Without dead ends: 140 [2019-11-23 20:41:26,719 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 55 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 20:41:26,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-11-23 20:41:26,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 121. [2019-11-23 20:41:26,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-23 20:41:26,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 150 transitions. [2019-11-23 20:41:26,732 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 150 transitions. Word has length 64 [2019-11-23 20:41:26,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:26,732 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 150 transitions. [2019-11-23 20:41:26,732 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:41:26,732 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 150 transitions. [2019-11-23 20:41:26,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-23 20:41:26,733 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:26,733 INFO L410 BasicCegarLoop]: trace histogram [28, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:26,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:26,937 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:26,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:26,938 INFO L82 PathProgramCache]: Analyzing trace with hash -883271324, now seen corresponding path program 9 times [2019-11-23 20:41:26,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:26,939 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658957422] [2019-11-23 20:41:26,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:26,944 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:26,945 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333553181] [2019-11-23 20:41:26,945 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 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 20:41:27,151 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 20:41:27,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:27,152 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:41:27,155 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 213 proven. 28 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2019-11-23 20:41:27,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658957422] [2019-11-23 20:41:27,299 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:27,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333553181] [2019-11-23 20:41:27,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:27,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-23 20:41:27,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881163932] [2019-11-23 20:41:27,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:41:27,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:27,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:41:27,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:41:27,305 INFO L87 Difference]: Start difference. First operand 121 states and 150 transitions. Second operand 11 states. [2019-11-23 20:41:27,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:27,391 INFO L93 Difference]: Finished difference Result 268 states and 328 transitions. [2019-11-23 20:41:27,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:41:27,392 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2019-11-23 20:41:27,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:27,393 INFO L225 Difference]: With dead ends: 268 [2019-11-23 20:41:27,393 INFO L226 Difference]: Without dead ends: 152 [2019-11-23 20:41:27,394 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:41:27,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-11-23 20:41:27,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 131. [2019-11-23 20:41:27,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-11-23 20:41:27,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 162 transitions. [2019-11-23 20:41:27,408 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 162 transitions. Word has length 68 [2019-11-23 20:41:27,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:27,408 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 162 transitions. [2019-11-23 20:41:27,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:41:27,409 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 162 transitions. [2019-11-23 20:41:27,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-23 20:41:27,410 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:27,410 INFO L410 BasicCegarLoop]: trace histogram [32, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:27,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:27,615 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:27,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:27,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1130915364, now seen corresponding path program 10 times [2019-11-23 20:41:27,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:27,616 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279716832] [2019-11-23 20:41:27,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:27,629 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:27,633 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164123962] [2019-11-23 20:41:27,633 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 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