/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-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:41:01,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:41:01,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:41:01,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:41:01,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:41:01,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:41:01,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:41:01,866 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:41:01,870 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:41:01,877 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:41:01,878 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:41:01,879 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:41:01,879 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:41:01,880 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:41:01,881 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:41:01,886 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:41:01,887 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:41:01,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:41:01,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:41:01,895 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:41:01,897 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:41:01,898 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:41:01,900 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:41:01,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:41:01,905 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:41:01,919 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:41:01,919 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:41:01,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:41:01,926 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 20:41:01,946 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:41:01,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:41:01,948 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:41:01,948 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:41:01,948 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:41:01,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:41:01,949 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:41:01,949 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:41:01,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:41:01,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:41:01,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:41:01,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:41:01,951 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:41:01,951 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:41:01,951 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:41:01,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:41:01,952 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:41:01,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:41:01,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:41:01,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:41:01,953 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:41:01,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:41:01,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:41:01,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:41:01,953 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:41:01,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:41:01,954 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:41:01,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:41:01,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:41:01,954 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:41:02,242 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:41:02,256 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:41:02,260 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:41:02,261 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:41:02,262 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:41:02,263 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/init-3-u.c [2019-11-23 20:41:02,341 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b034f7bc/61032173c47a4dfb908be3b07acc9925/FLAG724e9ec5c [2019-11-23 20:41:02,756 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:41:02,757 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/init-3-u.c [2019-11-23 20:41:02,764 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b034f7bc/61032173c47a4dfb908be3b07acc9925/FLAG724e9ec5c [2019-11-23 20:41:03,162 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b034f7bc/61032173c47a4dfb908be3b07acc9925 [2019-11-23 20:41:03,171 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:41:03,173 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:41:03,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:41:03,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:41:03,178 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:41:03,179 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:41:03" (1/1) ... [2019-11-23 20:41:03,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ee337c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:03, skipping insertion in model container [2019-11-23 20:41:03,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:41:03" (1/1) ... [2019-11-23 20:41:03,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:41:03,209 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:41:03,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:41:03,432 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:41:03,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:41:03,480 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:41:03,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:03 WrapperNode [2019-11-23 20:41:03,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:41:03,481 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:41:03,481 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:41:03,482 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:41:03,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:03" (1/1) ... [2019-11-23 20:41:03,578 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:03" (1/1) ... [2019-11-23 20:41:03,600 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:41:03,600 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:41:03,600 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:41:03,600 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:41:03,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:03" (1/1) ... [2019-11-23 20:41:03,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:03" (1/1) ... [2019-11-23 20:41:03,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:03" (1/1) ... [2019-11-23 20:41:03,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:03" (1/1) ... [2019-11-23 20:41:03,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:03" (1/1) ... [2019-11-23 20:41:03,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:03" (1/1) ... [2019-11-23 20:41:03,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:03" (1/1) ... [2019-11-23 20:41:03,626 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:41:03,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:41:03,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:41:03,627 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:41:03,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:03" (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 20:41:03,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:41:03,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:41:03,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:41:03,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:41:03,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:41:03,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:41:03,914 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:41:03,914 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-23 20:41:03,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:41:03 BoogieIcfgContainer [2019-11-23 20:41:03,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:41:03,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:41:03,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:41:03,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:41:03,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:41:03" (1/3) ... [2019-11-23 20:41:03,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@368c0b18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:41:03, skipping insertion in model container [2019-11-23 20:41:03,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:03" (2/3) ... [2019-11-23 20:41:03,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@368c0b18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:41:03, skipping insertion in model container [2019-11-23 20:41:03,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:41:03" (3/3) ... [2019-11-23 20:41:03,923 INFO L109 eAbstractionObserver]: Analyzing ICFG init-3-u.c [2019-11-23 20:41:03,933 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:41:03,940 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:41:03,952 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:41:03,980 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:41:03,981 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:41:03,981 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:41:03,981 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:41:03,981 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:41:03,981 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:41:03,981 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:41:03,981 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:41:04,000 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-23 20:41:04,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:41:04,009 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:04,010 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:04,011 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:04,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:04,019 INFO L82 PathProgramCache]: Analyzing trace with hash 468841592, now seen corresponding path program 1 times [2019-11-23 20:41:04,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:04,030 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963441968] [2019-11-23 20:41:04,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:04,120 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:04,120 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542859679] [2019-11-23 20:41:04,121 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 20:41:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:41:04,183 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-23 20:41:04,188 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:04,199 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 20:41:04,199 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963441968] [2019-11-23 20:41:04,200 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:04,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542859679] [2019-11-23 20:41:04,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:41:04,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:41:04,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322302483] [2019-11-23 20:41:04,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:41:04,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:04,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:41:04,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:41:04,223 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-11-23 20:41:04,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:04,243 INFO L93 Difference]: Finished difference Result 40 states and 64 transitions. [2019-11-23 20:41:04,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:41:04,244 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-23 20:41:04,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:04,254 INFO L225 Difference]: With dead ends: 40 [2019-11-23 20:41:04,254 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 20:41:04,258 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 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 20:41:04,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 20:41:04,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-23 20:41:04,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 20:41:04,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2019-11-23 20:41:04,291 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 9 [2019-11-23 20:41:04,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:04,292 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2019-11-23 20:41:04,292 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:41:04,292 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2019-11-23 20:41:04,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:41:04,293 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:04,293 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:04,496 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:04,496 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:04,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:04,497 INFO L82 PathProgramCache]: Analyzing trace with hash -386465062, now seen corresponding path program 1 times [2019-11-23 20:41:04,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:04,498 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122707480] [2019-11-23 20:41:04,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:04,504 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:04,505 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [730504910] [2019-11-23 20:41:04,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:41:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:41:04,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:41:04,550 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:04,581 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 20:41:04,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122707480] [2019-11-23 20:41:04,582 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:04,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730504910] [2019-11-23 20:41:04,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:41:04,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:41:04,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147339966] [2019-11-23 20:41:04,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:41:04,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:04,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:41:04,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:41:04,586 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand 3 states. [2019-11-23 20:41:04,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:04,637 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2019-11-23 20:41:04,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:41:04,638 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 20:41:04,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:04,638 INFO L225 Difference]: With dead ends: 32 [2019-11-23 20:41:04,639 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 20:41:04,640 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 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 20:41:04,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 20:41:04,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2019-11-23 20:41:04,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 20:41:04,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2019-11-23 20:41:04,645 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 9 [2019-11-23 20:41:04,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:04,646 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2019-11-23 20:41:04,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:41:04,646 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2019-11-23 20:41:04,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 20:41:04,647 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:04,647 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:04,858 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:04,858 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:04,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:04,859 INFO L82 PathProgramCache]: Analyzing trace with hash 750439074, now seen corresponding path program 1 times [2019-11-23 20:41:04,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:04,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508640985] [2019-11-23 20:41:04,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:04,869 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:04,870 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108777625] [2019-11-23 20:41:04,871 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 20:41:04,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:41:04,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:41:04,936 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:04,954 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 20:41:04,955 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508640985] [2019-11-23 20:41:04,955 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:04,955 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108777625] [2019-11-23 20:41:04,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:41:04,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:41:04,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851699564] [2019-11-23 20:41:04,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:41:04,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:04,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:41:04,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:41:04,960 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand 4 states. [2019-11-23 20:41:05,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:05,047 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2019-11-23 20:41:05,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:41:05,048 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-23 20:41:05,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:05,049 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:41:05,049 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:41:05,050 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 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 20:41:05,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:41:05,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2019-11-23 20:41:05,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:41:05,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2019-11-23 20:41:05,059 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 12 [2019-11-23 20:41:05,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:05,060 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2019-11-23 20:41:05,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:41:05,060 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2019-11-23 20:41:05,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:41:05,062 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:05,062 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:05,265 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:05,265 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:05,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:05,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1168938424, now seen corresponding path program 1 times [2019-11-23 20:41:05,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:05,266 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528385526] [2019-11-23 20:41:05,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:05,271 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:05,271 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479684314] [2019-11-23 20:41:05,272 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 20:41:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:41:05,314 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:41:05,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:05,333 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 20:41:05,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528385526] [2019-11-23 20:41:05,334 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:05,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479684314] [2019-11-23 20:41:05,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:41:05,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:41:05,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737502258] [2019-11-23 20:41:05,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:41:05,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:05,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:41:05,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:41:05,336 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 4 states. [2019-11-23 20:41:05,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:05,408 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2019-11-23 20:41:05,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:41:05,408 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-23 20:41:05,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:05,409 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:41:05,409 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 20:41:05,410 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 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 20:41:05,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 20:41:05,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2019-11-23 20:41:05,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 20:41:05,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2019-11-23 20:41:05,417 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 15 [2019-11-23 20:41:05,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:05,417 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2019-11-23 20:41:05,417 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:41:05,417 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2019-11-23 20:41:05,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:41:05,418 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:05,418 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:05,621 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:05,622 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:05,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:05,623 INFO L82 PathProgramCache]: Analyzing trace with hash 18975699, now seen corresponding path program 1 times [2019-11-23 20:41:05,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:05,624 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121763194] [2019-11-23 20:41:05,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:05,629 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:05,629 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269660394] [2019-11-23 20:41:05,629 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 20:41:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:41:05,680 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:41:05,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:05,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:41:05,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121763194] [2019-11-23 20:41:05,732 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:05,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269660394] [2019-11-23 20:41:05,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:05,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:41:05,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7651273] [2019-11-23 20:41:05,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:41:05,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:05,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:41:05,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:41:05,734 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 5 states. [2019-11-23 20:41:05,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:05,806 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2019-11-23 20:41:05,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:41:05,806 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-11-23 20:41:05,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:05,807 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:41:05,807 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 20:41:05,808 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 20:41:05,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 20:41:05,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2019-11-23 20:41:05,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:41:05,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-11-23 20:41:05,814 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 16 [2019-11-23 20:41:05,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:05,814 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-11-23 20:41:05,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:41:05,815 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-11-23 20:41:05,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:41:05,815 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:05,816 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:06,024 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:06,025 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:06,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:06,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1270130408, now seen corresponding path program 2 times [2019-11-23 20:41:06,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:06,026 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863168532] [2019-11-23 20:41:06,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:06,030 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:06,030 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237972939] [2019-11-23 20:41:06,031 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:06,074 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:41:06,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:06,075 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:41:06,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:06,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:41:06,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863168532] [2019-11-23 20:41:06,122 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:06,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237972939] [2019-11-23 20:41:06,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:06,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 20:41:06,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536149686] [2019-11-23 20:41:06,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:41:06,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:06,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:41:06,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:41:06,125 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 6 states. [2019-11-23 20:41:06,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:06,195 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2019-11-23 20:41:06,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:41:06,196 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-23 20:41:06,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:06,196 INFO L225 Difference]: With dead ends: 62 [2019-11-23 20:41:06,196 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 20:41:06,197 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 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 20:41:06,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 20:41:06,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2019-11-23 20:41:06,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:41:06,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-11-23 20:41:06,204 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2019-11-23 20:41:06,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:06,204 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-11-23 20:41:06,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:41:06,204 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-11-23 20:41:06,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:41:06,205 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:06,205 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:06,408 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:06,408 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:06,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:06,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1717253235, now seen corresponding path program 3 times [2019-11-23 20:41:06,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:06,410 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919083992] [2019-11-23 20:41:06,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:06,414 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:06,415 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226975557] [2019-11-23 20:41:06,415 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:06,454 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:41:06,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:06,454 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:41:06,456 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:41:06,484 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919083992] [2019-11-23 20:41:06,484 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:06,484 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226975557] [2019-11-23 20:41:06,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:06,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-23 20:41:06,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180602644] [2019-11-23 20:41:06,485 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:41:06,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:06,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:41:06,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:41:06,486 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 4 states. [2019-11-23 20:41:06,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:06,535 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2019-11-23 20:41:06,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:41:06,536 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-11-23 20:41:06,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:06,537 INFO L225 Difference]: With dead ends: 65 [2019-11-23 20:41:06,537 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 20:41:06,538 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 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 20:41:06,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 20:41:06,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2019-11-23 20:41:06,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:41:06,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2019-11-23 20:41:06,545 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 18 [2019-11-23 20:41:06,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:06,546 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2019-11-23 20:41:06,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:41:06,546 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2019-11-23 20:41:06,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:41:06,547 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:06,547 INFO L410 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:06,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:06,758 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:06,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:06,759 INFO L82 PathProgramCache]: Analyzing trace with hash -939344134, now seen corresponding path program 4 times [2019-11-23 20:41:06,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:06,759 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515616503] [2019-11-23 20:41:06,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:06,764 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:06,765 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845021117] [2019-11-23 20:41:06,765 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:06,811 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:41:06,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:06,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:41:06,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:41:06,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515616503] [2019-11-23 20:41:06,872 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:06,873 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845021117] [2019-11-23 20:41:06,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:06,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 20:41:06,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602484874] [2019-11-23 20:41:06,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:41:06,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:06,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:41:06,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:41:06,874 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 8 states. [2019-11-23 20:41:07,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:07,035 INFO L93 Difference]: Finished difference Result 122 states and 149 transitions. [2019-11-23 20:41:07,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:41:07,036 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2019-11-23 20:41:07,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:07,037 INFO L225 Difference]: With dead ends: 122 [2019-11-23 20:41:07,037 INFO L226 Difference]: Without dead ends: 93 [2019-11-23 20:41:07,038 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:41:07,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-23 20:41:07,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2019-11-23 20:41:07,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-23 20:41:07,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2019-11-23 20:41:07,052 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 27 [2019-11-23 20:41:07,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:07,052 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2019-11-23 20:41:07,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:41:07,052 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2019-11-23 20:41:07,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:41:07,053 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:07,054 INFO L410 BasicCegarLoop]: trace histogram [12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:07,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:07,257 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:07,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:07,257 INFO L82 PathProgramCache]: Analyzing trace with hash -2028398182, now seen corresponding path program 5 times [2019-11-23 20:41:07,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:07,258 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377437749] [2019-11-23 20:41:07,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:07,263 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:07,263 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761434125] [2019-11-23 20:41:07,264 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:07,528 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-23 20:41:07,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:07,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:41:07,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:07,606 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 82 proven. 23 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-23 20:41:07,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377437749] [2019-11-23 20:41:07,607 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:07,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761434125] [2019-11-23 20:41:07,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:07,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 20:41:07,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717936402] [2019-11-23 20:41:07,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:41:07,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:07,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:41:07,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:41:07,610 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand 9 states. [2019-11-23 20:41:07,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:07,900 INFO L93 Difference]: Finished difference Result 170 states and 205 transitions. [2019-11-23 20:41:07,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:41:07,901 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2019-11-23 20:41:07,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:07,902 INFO L225 Difference]: With dead ends: 170 [2019-11-23 20:41:07,902 INFO L226 Difference]: Without dead ends: 123 [2019-11-23 20:41:07,903 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:41:07,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-23 20:41:07,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2019-11-23 20:41:07,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-23 20:41:07,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 108 transitions. [2019-11-23 20:41:07,923 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 108 transitions. Word has length 39 [2019-11-23 20:41:07,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:07,924 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 108 transitions. [2019-11-23 20:41:07,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:41:07,925 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 108 transitions. [2019-11-23 20:41:07,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:41:07,931 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:07,932 INFO L410 BasicCegarLoop]: trace histogram [18, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:08,135 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:08,135 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:08,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:08,136 INFO L82 PathProgramCache]: Analyzing trace with hash -804241990, now seen corresponding path program 6 times [2019-11-23 20:41:08,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:08,136 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694191988] [2019-11-23 20:41:08,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:08,142 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:08,143 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384580666] [2019-11-23 20:41:08,143 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:08,190 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-23 20:41:08,191 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:08,192 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:41:08,195 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:08,240 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 201 proven. 6 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-11-23 20:41:08,241 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694191988] [2019-11-23 20:41:08,241 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:08,241 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384580666] [2019-11-23 20:41:08,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:08,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 20:41:08,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757182149] [2019-11-23 20:41:08,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:41:08,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:08,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:41:08,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:41:08,243 INFO L87 Difference]: Start difference. First operand 87 states and 108 transitions. Second operand 7 states. [2019-11-23 20:41:08,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:08,301 INFO L93 Difference]: Finished difference Result 196 states and 248 transitions. [2019-11-23 20:41:08,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:41:08,302 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2019-11-23 20:41:08,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:08,303 INFO L225 Difference]: With dead ends: 196 [2019-11-23 20:41:08,303 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 20:41:08,304 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 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 20:41:08,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 20:41:08,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 102. [2019-11-23 20:41:08,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-11-23 20:41:08,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2019-11-23 20:41:08,332 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 51 [2019-11-23 20:41:08,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:08,332 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2019-11-23 20:41:08,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:41:08,333 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2019-11-23 20:41:08,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:41:08,333 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:08,335 INFO L410 BasicCegarLoop]: trace histogram [24, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:08,542 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:08,542 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:08,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:08,543 INFO L82 PathProgramCache]: Analyzing trace with hash 597276054, now seen corresponding path program 7 times [2019-11-23 20:41:08,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:08,543 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642499864] [2019-11-23 20:41:08,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:08,548 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:08,548 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1744950499] [2019-11-23 20:41:08,548 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 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 20:41:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:41:08,605 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:41:08,607 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 134 proven. 10 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2019-11-23 20:41:08,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642499864] [2019-11-23 20:41:08,670 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:08,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744950499] [2019-11-23 20:41:08,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:08,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 20:41:08,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498973212] [2019-11-23 20:41:08,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:41:08,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:08,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:41:08,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:41:08,672 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand 8 states. [2019-11-23 20:41:08,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:08,766 INFO L93 Difference]: Finished difference Result 227 states and 284 transitions. [2019-11-23 20:41:08,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:41:08,766 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2019-11-23 20:41:08,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:08,767 INFO L225 Difference]: With dead ends: 227 [2019-11-23 20:41:08,767 INFO L226 Difference]: Without dead ends: 134 [2019-11-23 20:41:08,768 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 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 20:41:08,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-11-23 20:41:08,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 117. [2019-11-23 20:41:08,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-11-23 20:41:08,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 144 transitions. [2019-11-23 20:41:08,782 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 144 transitions. Word has length 57 [2019-11-23 20:41:08,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:08,783 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 144 transitions. [2019-11-23 20:41:08,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:41:08,783 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 144 transitions. [2019-11-23 20:41:08,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:41:08,784 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:08,784 INFO L410 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:08,987 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:08,988 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:08,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:08,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1929398778, now seen corresponding path program 8 times [2019-11-23 20:41:08,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:08,989 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712248457] [2019-11-23 20:41:08,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:09,004 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:09,005 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [673952718] [2019-11-23 20:41:09,005 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:09,060 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:41:09,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:09,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:41:09,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 189 proven. 15 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2019-11-23 20:41:09,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712248457] [2019-11-23 20:41:09,139 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:09,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673952718] [2019-11-23 20:41:09,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:09,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 20:41:09,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366928809] [2019-11-23 20:41:09,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:41:09,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:09,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:41:09,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:41:09,142 INFO L87 Difference]: Start difference. First operand 117 states and 144 transitions. Second operand 9 states. [2019-11-23 20:41:09,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:09,240 INFO L93 Difference]: Finished difference Result 258 states and 320 transitions. [2019-11-23 20:41:09,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:41:09,240 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2019-11-23 20:41:09,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:09,242 INFO L225 Difference]: With dead ends: 258 [2019-11-23 20:41:09,242 INFO L226 Difference]: Without dead ends: 151 [2019-11-23 20:41:09,243 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 55 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 20:41:09,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-11-23 20:41:09,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 132. [2019-11-23 20:41:09,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-11-23 20:41:09,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 162 transitions. [2019-11-23 20:41:09,257 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 162 transitions. Word has length 63 [2019-11-23 20:41:09,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:09,257 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 162 transitions. [2019-11-23 20:41:09,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:41:09,257 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 162 transitions. [2019-11-23 20:41:09,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:41:09,258 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:09,258 INFO L410 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:09,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:09,462 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:09,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:09,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1555635498, now seen corresponding path program 9 times [2019-11-23 20:41:09,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:09,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497123558] [2019-11-23 20:41:09,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:09,469 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:09,469 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1773271527] [2019-11-23 20:41:09,470 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:09,557 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 20:41:09,558 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:09,558 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:41:09,561 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:09,666 INFO L134 CoverageAnalysis]: Checked inductivity of 908 backedges. 260 proven. 21 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2019-11-23 20:41:09,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497123558] [2019-11-23 20:41:09,667 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:09,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773271527] [2019-11-23 20:41:09,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:09,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-23 20:41:09,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008293788] [2019-11-23 20:41:09,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:41:09,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:09,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:41:09,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:41:09,668 INFO L87 Difference]: Start difference. First operand 132 states and 162 transitions. Second operand 10 states. [2019-11-23 20:41:09,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:09,749 INFO L93 Difference]: Finished difference Result 289 states and 356 transitions. [2019-11-23 20:41:09,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:41:09,749 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2019-11-23 20:41:09,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:09,751 INFO L225 Difference]: With dead ends: 289 [2019-11-23 20:41:09,751 INFO L226 Difference]: Without dead ends: 168 [2019-11-23 20:41:09,752 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 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 20:41:09,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-11-23 20:41:09,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 147. [2019-11-23 20:41:09,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-11-23 20:41:09,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 180 transitions. [2019-11-23 20:41:09,766 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 180 transitions. Word has length 69 [2019-11-23 20:41:09,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:09,767 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 180 transitions. [2019-11-23 20:41:09,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:41:09,767 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 180 transitions. [2019-11-23 20:41:09,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 20:41:09,768 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:09,768 INFO L410 BasicCegarLoop]: trace histogram [42, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:09,975 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:09,976 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:09,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:09,976 INFO L82 PathProgramCache]: Analyzing trace with hash 2132596282, now seen corresponding path program 10 times [2019-11-23 20:41:09,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:09,977 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539758902] [2019-11-23 20:41:09,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:09,983 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:09,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193513180] [2019-11-23 20:41:09,983 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:10,047 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:41:10,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:10,049 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:41:10,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:10,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 624 proven. 208 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2019-11-23 20:41:10,193 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539758902] [2019-11-23 20:41:10,193 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:10,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193513180] [2019-11-23 20:41:10,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:10,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-23 20:41:10,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429323510] [2019-11-23 20:41:10,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:41:10,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:10,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:41:10,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:41:10,195 INFO L87 Difference]: Start difference. First operand 147 states and 180 transitions. Second operand 14 states. [2019-11-23 20:41:10,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:10,441 INFO L93 Difference]: Finished difference Result 366 states and 441 transitions. [2019-11-23 20:41:10,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:41:10,441 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 75 [2019-11-23 20:41:10,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:10,445 INFO L225 Difference]: With dead ends: 366 [2019-11-23 20:41:10,445 INFO L226 Difference]: Without dead ends: 253 [2019-11-23 20:41:10,446 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:41:10,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2019-11-23 20:41:10,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 191. [2019-11-23 20:41:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-11-23 20:41:10,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 234 transitions. [2019-11-23 20:41:10,465 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 234 transitions. Word has length 75 [2019-11-23 20:41:10,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:10,465 INFO L462 AbstractCegarLoop]: Abstraction has 191 states and 234 transitions. [2019-11-23 20:41:10,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:41:10,465 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 234 transitions. [2019-11-23 20:41:10,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-23 20:41:10,466 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:10,466 INFO L410 BasicCegarLoop]: trace histogram [56, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:10,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:10,670 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:10,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:10,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1310270298, now seen corresponding path program 11 times [2019-11-23 20:41:10,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:10,672 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909832271] [2019-11-23 20:41:10,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:10,678 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:10,679 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075580779] [2019-11-23 20:41:10,679 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true