/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/add-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:39:04,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:39:04,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:39:04,649 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:39:04,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:39:04,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:39:04,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:39:04,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:39:04,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:39:04,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:39:04,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:39:04,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:39:04,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:39:04,676 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:39:04,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:39:04,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:39:04,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:39:04,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:39:04,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:39:04,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:39:04,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:39:04,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:39:04,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:39:04,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:39:04,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:39:04,707 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:39:04,708 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:39:04,709 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:39:04,709 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:39:04,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:39:04,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:39:04,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:39:04,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:39:04,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:39:04,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:39:04,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:39:04,719 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 20:39:04,740 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:39:04,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:39:04,744 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:39:04,744 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:39:04,744 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:39:04,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:39:04,745 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:39:04,745 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:39:04,745 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:39:04,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:39:04,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:39:04,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:39:04,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:39:04,747 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:39:04,747 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:39:04,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:39:04,748 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:39:04,748 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:39:04,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:39:04,748 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:39:04,749 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:39:04,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:39:04,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:39:04,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:39:04,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:39:04,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:39:04,750 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:39:04,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:39:04,750 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:39:04,750 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:39:05,010 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:39:05,032 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:39:05,036 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:39:05,037 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:39:05,038 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:39:05,039 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/add-3-n-u.c [2019-11-23 20:39:05,108 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c84a0e9a9/49faf241c7054325a1031dcefebd43be/FLAG4592066d0 [2019-11-23 20:39:05,583 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:39:05,584 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/add-3-n-u.c [2019-11-23 20:39:05,591 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c84a0e9a9/49faf241c7054325a1031dcefebd43be/FLAG4592066d0 [2019-11-23 20:39:05,952 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c84a0e9a9/49faf241c7054325a1031dcefebd43be [2019-11-23 20:39:05,961 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:39:05,963 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:39:05,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:39:05,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:39:05,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:39:05,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:39:05" (1/1) ... [2019-11-23 20:39:05,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7628aad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:05, skipping insertion in model container [2019-11-23 20:39:05,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:39:05" (1/1) ... [2019-11-23 20:39:05,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:39:06,003 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:39:06,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:39:06,185 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:39:06,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:39:06,237 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:39:06,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:06 WrapperNode [2019-11-23 20:39:06,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:39:06,238 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:39:06,238 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:39:06,238 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:39:06,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:06" (1/1) ... [2019-11-23 20:39:06,346 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:06" (1/1) ... [2019-11-23 20:39:06,382 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:39:06,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:39:06,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:39:06,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:39:06,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:06" (1/1) ... [2019-11-23 20:39:06,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:06" (1/1) ... [2019-11-23 20:39:06,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:06" (1/1) ... [2019-11-23 20:39:06,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:06" (1/1) ... [2019-11-23 20:39:06,403 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:06" (1/1) ... [2019-11-23 20:39:06,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:06" (1/1) ... [2019-11-23 20:39:06,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:06" (1/1) ... [2019-11-23 20:39:06,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:39:06,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:39:06,415 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:39:06,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:39:06,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:06" (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 20:39:06,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:39:06,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:39:06,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:39:06,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:39:06,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:39:06,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:39:06,829 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:39:06,830 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 20:39:06,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:39:06 BoogieIcfgContainer [2019-11-23 20:39:06,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:39:06,832 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:39:06,832 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:39:06,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:39:06,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:39:05" (1/3) ... [2019-11-23 20:39:06,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ec87ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:39:06, skipping insertion in model container [2019-11-23 20:39:06,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:06" (2/3) ... [2019-11-23 20:39:06,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ec87ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:39:06, skipping insertion in model container [2019-11-23 20:39:06,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:39:06" (3/3) ... [2019-11-23 20:39:06,838 INFO L109 eAbstractionObserver]: Analyzing ICFG add-3-n-u.c [2019-11-23 20:39:06,846 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:39:06,852 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:39:06,862 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:39:06,887 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:39:06,887 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:39:06,887 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:39:06,888 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:39:06,888 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:39:06,888 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:39:06,888 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:39:06,888 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:39:06,901 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-23 20:39:06,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:39:06,908 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:06,908 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:06,909 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:06,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:06,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1568356865, now seen corresponding path program 1 times [2019-11-23 20:39:06,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:06,922 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779480901] [2019-11-23 20:39:06,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:06,996 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:06,997 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342421058] [2019-11-23 20:39:06,997 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 20:39:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:07,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-23 20:39:07,084 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:07,101 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 20:39:07,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779480901] [2019-11-23 20:39:07,102 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:39:07,102 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342421058] [2019-11-23 20:39:07,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:39:07,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:39:07,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126447683] [2019-11-23 20:39:07,110 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:39:07,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:07,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:39:07,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:39:07,128 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2019-11-23 20:39:07,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:07,152 INFO L93 Difference]: Finished difference Result 52 states and 88 transitions. [2019-11-23 20:39:07,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:39:07,153 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-11-23 20:39:07,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:07,165 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:39:07,165 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 20:39:07,169 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 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 20:39:07,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 20:39:07,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-23 20:39:07,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 20:39:07,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2019-11-23 20:39:07,209 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 11 [2019-11-23 20:39:07,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:07,209 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2019-11-23 20:39:07,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:39:07,210 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2019-11-23 20:39:07,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:39:07,211 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:07,211 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:07,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:07,415 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:07,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:07,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1115669473, now seen corresponding path program 1 times [2019-11-23 20:39:07,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:07,419 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756634288] [2019-11-23 20:39:07,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:07,431 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:07,432 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028381952] [2019-11-23 20:39:07,432 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 20:39:07,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:07,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:39:07,511 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:07,542 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 20:39:07,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756634288] [2019-11-23 20:39:07,543 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:39:07,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028381952] [2019-11-23 20:39:07,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:39:07,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:39:07,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221958131] [2019-11-23 20:39:07,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:39:07,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:07,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:39:07,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:39:07,547 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 3 states. [2019-11-23 20:39:07,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:07,596 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2019-11-23 20:39:07,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:39:07,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-23 20:39:07,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:07,599 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:39:07,599 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 20:39:07,600 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 20:39:07,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 20:39:07,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2019-11-23 20:39:07,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:39:07,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2019-11-23 20:39:07,607 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 11 [2019-11-23 20:39:07,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:07,607 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2019-11-23 20:39:07,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:39:07,608 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2019-11-23 20:39:07,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:39:07,608 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:07,609 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:07,812 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:07,812 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:07,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:07,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1536116311, now seen corresponding path program 1 times [2019-11-23 20:39:07,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:07,814 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86259891] [2019-11-23 20:39:07,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:07,821 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:07,821 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1280548882] [2019-11-23 20:39:07,822 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 20:39:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:07,873 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:39:07,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:07,896 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 20:39:07,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86259891] [2019-11-23 20:39:07,899 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:39:07,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280548882] [2019-11-23 20:39:07,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:39:07,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:39:07,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082051376] [2019-11-23 20:39:07,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:39:07,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:07,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:39:07,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:39:07,903 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand 4 states. [2019-11-23 20:39:08,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:08,013 INFO L93 Difference]: Finished difference Result 61 states and 84 transitions. [2019-11-23 20:39:08,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:39:08,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-23 20:39:08,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:08,016 INFO L225 Difference]: With dead ends: 61 [2019-11-23 20:39:08,016 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 20:39:08,019 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 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 20:39:08,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 20:39:08,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2019-11-23 20:39:08,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:39:08,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2019-11-23 20:39:08,032 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 14 [2019-11-23 20:39:08,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:08,033 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2019-11-23 20:39:08,035 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:39:08,035 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2019-11-23 20:39:08,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:39:08,037 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:08,037 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:08,240 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:08,240 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:08,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:08,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1209800511, now seen corresponding path program 1 times [2019-11-23 20:39:08,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:08,242 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623006421] [2019-11-23 20:39:08,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:08,248 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:08,249 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808188404] [2019-11-23 20:39:08,249 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 20:39:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:08,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:39:08,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:08,342 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 20:39:08,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623006421] [2019-11-23 20:39:08,343 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:39:08,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808188404] [2019-11-23 20:39:08,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:39:08,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:39:08,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357280759] [2019-11-23 20:39:08,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:39:08,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:08,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:39:08,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:39:08,350 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 4 states. [2019-11-23 20:39:08,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:08,427 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2019-11-23 20:39:08,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:39:08,428 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-23 20:39:08,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:08,429 INFO L225 Difference]: With dead ends: 61 [2019-11-23 20:39:08,429 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 20:39:08,429 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 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 20:39:08,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 20:39:08,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2019-11-23 20:39:08,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:39:08,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2019-11-23 20:39:08,437 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2019-11-23 20:39:08,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:08,437 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2019-11-23 20:39:08,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:39:08,438 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2019-11-23 20:39:08,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:39:08,438 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:08,439 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:08,642 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:08,643 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:08,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:08,643 INFO L82 PathProgramCache]: Analyzing trace with hash -97783142, now seen corresponding path program 1 times [2019-11-23 20:39:08,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:08,644 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126270794] [2019-11-23 20:39:08,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:08,652 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:08,652 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469671797] [2019-11-23 20:39:08,653 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 20:39:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:08,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:39:08,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:08,742 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 20:39:08,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126270794] [2019-11-23 20:39:08,745 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:39:08,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469671797] [2019-11-23 20:39:08,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:39:08,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:39:08,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888867857] [2019-11-23 20:39:08,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:39:08,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:08,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:39:08,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:39:08,747 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 5 states. [2019-11-23 20:39:08,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:08,860 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2019-11-23 20:39:08,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:39:08,861 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-11-23 20:39:08,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:08,862 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:39:08,862 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 20:39:08,863 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 20:39:08,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 20:39:08,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2019-11-23 20:39:08,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 20:39:08,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2019-11-23 20:39:08,881 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2019-11-23 20:39:08,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:08,883 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2019-11-23 20:39:08,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:39:08,883 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2019-11-23 20:39:08,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:39:08,884 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:08,884 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:09,088 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:09,088 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:09,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:09,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1978170721, now seen corresponding path program 2 times [2019-11-23 20:39:09,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:09,089 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739045941] [2019-11-23 20:39:09,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:09,094 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:09,094 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65053194] [2019-11-23 20:39:09,094 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 20:39:09,134 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:39:09,134 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:09,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:39:09,137 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:09,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:39:09,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739045941] [2019-11-23 20:39:09,163 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:39:09,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65053194] [2019-11-23 20:39:09,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:39:09,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:39:09,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136676200] [2019-11-23 20:39:09,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:39:09,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:09,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:39:09,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:39:09,165 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 4 states. [2019-11-23 20:39:09,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:09,228 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2019-11-23 20:39:09,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:39:09,230 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-23 20:39:09,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:09,231 INFO L225 Difference]: With dead ends: 79 [2019-11-23 20:39:09,231 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:39:09,232 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:39:09,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:39:09,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 36. [2019-11-23 20:39:09,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:39:09,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2019-11-23 20:39:09,240 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 19 [2019-11-23 20:39:09,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:09,241 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2019-11-23 20:39:09,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:39:09,241 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2019-11-23 20:39:09,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:39:09,242 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:09,242 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:09,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:09,454 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:09,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:09,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1749813085, now seen corresponding path program 1 times [2019-11-23 20:39:09,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:09,455 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585833949] [2019-11-23 20:39:09,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:09,460 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:09,460 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114876141] [2019-11-23 20:39:09,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:39:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:09,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:39:09,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:09,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:39:09,551 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585833949] [2019-11-23 20:39:09,551 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:39:09,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114876141] [2019-11-23 20:39:09,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:39:09,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 20:39:09,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975843511] [2019-11-23 20:39:09,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:39:09,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:09,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:39:09,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:39:09,555 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 6 states. [2019-11-23 20:39:09,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:09,652 INFO L93 Difference]: Finished difference Result 83 states and 103 transitions. [2019-11-23 20:39:09,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:39:09,652 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2019-11-23 20:39:09,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:09,653 INFO L225 Difference]: With dead ends: 83 [2019-11-23 20:39:09,653 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:39:09,655 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 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 20:39:09,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:39:09,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2019-11-23 20:39:09,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 20:39:09,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2019-11-23 20:39:09,671 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 27 [2019-11-23 20:39:09,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:09,671 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2019-11-23 20:39:09,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:39:09,673 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2019-11-23 20:39:09,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:39:09,675 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:09,675 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:09,879 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:09,879 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:09,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:09,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1516282694, now seen corresponding path program 2 times [2019-11-23 20:39:09,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:09,880 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085667147] [2019-11-23 20:39:09,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:09,886 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:09,886 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676785957] [2019-11-23 20:39:09,886 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 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 20:39:09,954 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:39:09,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:09,956 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:39:09,959 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:39:10,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085667147] [2019-11-23 20:39:10,011 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:39:10,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676785957] [2019-11-23 20:39:10,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:39:10,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 20:39:10,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842805358] [2019-11-23 20:39:10,013 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:39:10,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:10,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:39:10,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:39:10,014 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 7 states. [2019-11-23 20:39:10,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:10,133 INFO L93 Difference]: Finished difference Result 95 states and 116 transitions. [2019-11-23 20:39:10,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:39:10,133 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-23 20:39:10,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:10,134 INFO L225 Difference]: With dead ends: 95 [2019-11-23 20:39:10,135 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 20:39:10,135 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 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 20:39:10,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 20:39:10,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2019-11-23 20:39:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:39:10,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2019-11-23 20:39:10,155 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 29 [2019-11-23 20:39:10,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:10,155 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2019-11-23 20:39:10,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:39:10,156 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2019-11-23 20:39:10,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:39:10,157 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:10,157 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:10,357 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:10,358 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:10,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:10,359 INFO L82 PathProgramCache]: Analyzing trace with hash 53106109, now seen corresponding path program 3 times [2019-11-23 20:39:10,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:10,360 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921838147] [2019-11-23 20:39:10,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:10,366 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:10,367 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119061362] [2019-11-23 20:39:10,367 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 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 20:39:10,416 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:39:10,416 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:10,417 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:39:10,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:10,460 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-23 20:39:10,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921838147] [2019-11-23 20:39:10,461 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:39:10,461 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119061362] [2019-11-23 20:39:10,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:39:10,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:39:10,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226490873] [2019-11-23 20:39:10,462 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:39:10,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:10,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:39:10,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:39:10,463 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 5 states. [2019-11-23 20:39:10,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:10,534 INFO L93 Difference]: Finished difference Result 157 states and 196 transitions. [2019-11-23 20:39:10,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:39:10,535 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2019-11-23 20:39:10,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:10,537 INFO L225 Difference]: With dead ends: 157 [2019-11-23 20:39:10,538 INFO L226 Difference]: Without dead ends: 124 [2019-11-23 20:39:10,538 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 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 20:39:10,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-11-23 20:39:10,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 66. [2019-11-23 20:39:10,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:39:10,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2019-11-23 20:39:10,552 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 31 [2019-11-23 20:39:10,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:10,552 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2019-11-23 20:39:10,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:39:10,552 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2019-11-23 20:39:10,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:39:10,554 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:10,554 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:10,762 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:10,762 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:10,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:10,763 INFO L82 PathProgramCache]: Analyzing trace with hash -893728359, now seen corresponding path program 4 times [2019-11-23 20:39:10,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:10,763 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875833788] [2019-11-23 20:39:10,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:10,769 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:39:10,770 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136774077] [2019-11-23 20:39:10,770 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 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