/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/rev-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:43:15,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:43:15,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:43:15,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:43:15,552 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:43:15,553 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:43:15,555 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:43:15,557 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:43:15,559 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:43:15,559 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:43:15,560 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:43:15,562 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:43:15,562 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:43:15,563 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:43:15,564 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:43:15,565 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:43:15,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:43:15,567 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:43:15,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:43:15,571 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:43:15,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:43:15,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:43:15,575 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:43:15,576 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:43:15,579 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:43:15,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:43:15,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:43:15,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:43:15,591 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 20:43:15,606 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:43:15,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:43:15,607 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:43:15,608 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:43:15,608 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:43:15,608 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:43:15,608 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:43:15,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:43:15,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:43:15,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:43:15,609 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:43:15,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:43:15,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:43:15,610 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:43:15,610 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:43:15,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:43:15,611 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:43:15,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:43:15,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:43:15,611 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:43:15,612 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:43:15,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:43:15,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:43:15,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:43:15,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:43:15,613 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:43:15,613 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:43:15,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:43:15,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:43:15,614 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:43:15,873 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:43:15,892 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:43:15,895 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:43:15,897 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:43:15,897 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:43:15,898 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/rev-3-u.c [2019-11-23 20:43:15,972 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/589aed9bf/abc838f2405e4b949a9b386c1327d5d8/FLAG884f9f999 [2019-11-23 20:43:16,439 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:43:16,439 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/rev-3-u.c [2019-11-23 20:43:16,447 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/589aed9bf/abc838f2405e4b949a9b386c1327d5d8/FLAG884f9f999 [2019-11-23 20:43:16,817 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/589aed9bf/abc838f2405e4b949a9b386c1327d5d8 [2019-11-23 20:43:16,827 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:43:16,829 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:43:16,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:43:16,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:43:16,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:43:16,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:43:16" (1/1) ... [2019-11-23 20:43:16,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dc62c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:43:16, skipping insertion in model container [2019-11-23 20:43:16,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:43:16" (1/1) ... [2019-11-23 20:43:16,848 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:43:16,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:43:17,058 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:43:17,064 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:43:17,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:43:17,189 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:43:17,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:43:17 WrapperNode [2019-11-23 20:43:17,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:43:17,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:43:17,190 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:43:17,190 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:43:17,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:43:17" (1/1) ... [2019-11-23 20:43:17,206 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:43:17" (1/1) ... [2019-11-23 20:43:17,230 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:43:17,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:43:17,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:43:17,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:43:17,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:43:17" (1/1) ... [2019-11-23 20:43:17,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:43:17" (1/1) ... [2019-11-23 20:43:17,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:43:17" (1/1) ... [2019-11-23 20:43:17,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:43:17" (1/1) ... [2019-11-23 20:43:17,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:43:17" (1/1) ... [2019-11-23 20:43:17,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:43:17" (1/1) ... [2019-11-23 20:43:17,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:43:17" (1/1) ... [2019-11-23 20:43:17,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:43:17,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:43:17,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:43:17,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:43:17,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:43:17" (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 20:43:17,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:43:17,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:43:17,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:43:17,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:43:17,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:43:17,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:43:17,637 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:43:17,637 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 20:43:17,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:43:17 BoogieIcfgContainer [2019-11-23 20:43:17,639 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:43:17,640 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:43:17,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:43:17,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:43:17,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:43:16" (1/3) ... [2019-11-23 20:43:17,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365ecbfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:43:17, skipping insertion in model container [2019-11-23 20:43:17,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:43:17" (2/3) ... [2019-11-23 20:43:17,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365ecbfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:43:17, skipping insertion in model container [2019-11-23 20:43:17,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:43:17" (3/3) ... [2019-11-23 20:43:17,646 INFO L109 eAbstractionObserver]: Analyzing ICFG rev-3-u.c [2019-11-23 20:43:17,657 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:43:17,669 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:43:17,679 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:43:17,699 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:43:17,699 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:43:17,699 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:43:17,699 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:43:17,700 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:43:17,700 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:43:17,700 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:43:17,700 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:43:17,715 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-23 20:43:17,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:43:17,724 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:17,725 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:43:17,726 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:17,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:17,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1568356865, now seen corresponding path program 1 times [2019-11-23 20:43:17,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:17,739 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492542427] [2019-11-23 20:43:17,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:17,814 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:17,814 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858933640] [2019-11-23 20:43:17,815 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 20:43:17,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:43:17,874 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-23 20:43:17,880 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:17,894 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 20:43:17,894 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492542427] [2019-11-23 20:43:17,895 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:17,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858933640] [2019-11-23 20:43:17,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:43:17,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:43:17,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772875813] [2019-11-23 20:43:17,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:43:17,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:17,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:43:17,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:43:17,919 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2019-11-23 20:43:17,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:17,941 INFO L93 Difference]: Finished difference Result 52 states and 88 transitions. [2019-11-23 20:43:17,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:43:17,943 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-11-23 20:43:17,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:17,953 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:43:17,953 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 20:43:17,957 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 20:43:17,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 20:43:17,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-23 20:43:17,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 20:43:17,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2019-11-23 20:43:17,997 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 11 [2019-11-23 20:43:17,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:17,997 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2019-11-23 20:43:17,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:43:17,998 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2019-11-23 20:43:17,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:43:17,998 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:17,999 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:43:18,202 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:18,202 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:18,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:18,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1115669473, now seen corresponding path program 1 times [2019-11-23 20:43:18,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:18,204 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823337285] [2019-11-23 20:43:18,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:18,210 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:18,210 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337539440] [2019-11-23 20:43:18,211 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 20:43:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:43:18,257 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:43:18,258 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:18,291 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 20:43:18,292 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823337285] [2019-11-23 20:43:18,292 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:18,292 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337539440] [2019-11-23 20:43:18,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:43:18,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:43:18,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345833924] [2019-11-23 20:43:18,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:43:18,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:18,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:43:18,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:43:18,296 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 3 states. [2019-11-23 20:43:18,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:18,380 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2019-11-23 20:43:18,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:43:18,383 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-23 20:43:18,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:18,384 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:43:18,384 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 20:43:18,385 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 20:43:18,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 20:43:18,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2019-11-23 20:43:18,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:43:18,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2019-11-23 20:43:18,397 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 11 [2019-11-23 20:43:18,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:18,398 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2019-11-23 20:43:18,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:43:18,398 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2019-11-23 20:43:18,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:43:18,399 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:18,399 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:43:18,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:18,608 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:18,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:18,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1536116311, now seen corresponding path program 1 times [2019-11-23 20:43:18,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:18,609 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918148529] [2019-11-23 20:43:18,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:18,615 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:18,616 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453418019] [2019-11-23 20:43:18,616 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 20:43:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:43:18,654 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:43:18,656 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:18,678 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 20:43:18,679 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918148529] [2019-11-23 20:43:18,679 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:18,679 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453418019] [2019-11-23 20:43:18,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:43:18,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:43:18,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353270593] [2019-11-23 20:43:18,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:43:18,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:18,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:43:18,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:43:18,681 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand 4 states. [2019-11-23 20:43:18,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:18,795 INFO L93 Difference]: Finished difference Result 61 states and 84 transitions. [2019-11-23 20:43:18,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:43:18,796 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-23 20:43:18,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:18,797 INFO L225 Difference]: With dead ends: 61 [2019-11-23 20:43:18,797 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 20:43:18,798 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 20:43:18,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 20:43:18,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2019-11-23 20:43:18,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:43:18,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2019-11-23 20:43:18,805 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 14 [2019-11-23 20:43:18,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:18,805 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2019-11-23 20:43:18,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:43:18,806 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2019-11-23 20:43:18,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:43:18,807 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:18,807 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 20:43:19,009 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:19,010 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:19,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:19,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1209800511, now seen corresponding path program 1 times [2019-11-23 20:43:19,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:19,011 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727080505] [2019-11-23 20:43:19,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:19,016 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:19,017 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940021940] [2019-11-23 20:43:19,017 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 20:43:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:43:19,058 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:43:19,059 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:19,094 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 20:43:19,094 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727080505] [2019-11-23 20:43:19,094 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:19,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940021940] [2019-11-23 20:43:19,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:43:19,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:43:19,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601384091] [2019-11-23 20:43:19,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:43:19,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:19,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:43:19,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:43:19,100 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 4 states. [2019-11-23 20:43:19,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:19,171 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2019-11-23 20:43:19,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:43:19,172 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-23 20:43:19,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:19,172 INFO L225 Difference]: With dead ends: 61 [2019-11-23 20:43:19,172 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 20:43:19,173 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 20:43:19,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 20:43:19,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2019-11-23 20:43:19,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:43:19,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2019-11-23 20:43:19,180 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2019-11-23 20:43:19,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:19,180 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2019-11-23 20:43:19,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:43:19,181 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2019-11-23 20:43:19,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:43:19,181 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:19,181 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 20:43:19,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:19,382 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:19,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:19,383 INFO L82 PathProgramCache]: Analyzing trace with hash -97783142, now seen corresponding path program 1 times [2019-11-23 20:43:19,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:19,383 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796877632] [2019-11-23 20:43:19,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:19,387 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:19,388 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963969176] [2019-11-23 20:43:19,388 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 20:43:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:43:19,430 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:43:19,431 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:19,471 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 20:43:19,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796877632] [2019-11-23 20:43:19,472 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:19,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963969176] [2019-11-23 20:43:19,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:43:19,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:43:19,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270030556] [2019-11-23 20:43:19,473 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:43:19,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:19,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:43:19,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:43:19,474 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 5 states. [2019-11-23 20:43:19,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:19,570 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2019-11-23 20:43:19,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:43:19,570 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-11-23 20:43:19,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:19,571 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:43:19,571 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 20:43:19,572 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 20:43:19,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 20:43:19,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2019-11-23 20:43:19,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 20:43:19,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2019-11-23 20:43:19,579 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2019-11-23 20:43:19,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:19,579 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2019-11-23 20:43:19,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:43:19,580 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2019-11-23 20:43:19,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:43:19,580 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:19,581 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 20:43:19,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:19,784 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:19,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:19,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1978170721, now seen corresponding path program 2 times [2019-11-23 20:43:19,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:19,785 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258187355] [2019-11-23 20:43:19,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:19,789 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:19,790 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031728109] [2019-11-23 20:43:19,790 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 20:43:19,832 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:43:19,833 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:43:19,834 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:43:19,836 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:19,854 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 20:43:19,854 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258187355] [2019-11-23 20:43:19,855 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:19,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031728109] [2019-11-23 20:43:19,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:43:19,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:43:19,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056146003] [2019-11-23 20:43:19,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:43:19,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:19,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:43:19,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:43:19,858 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 4 states. [2019-11-23 20:43:19,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:19,953 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2019-11-23 20:43:19,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:43:19,953 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-23 20:43:19,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:19,955 INFO L225 Difference]: With dead ends: 79 [2019-11-23 20:43:19,955 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:43:19,958 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 20:43:19,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:43:19,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 36. [2019-11-23 20:43:19,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:43:19,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2019-11-23 20:43:19,970 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 19 [2019-11-23 20:43:19,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:19,971 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2019-11-23 20:43:19,972 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:43:19,972 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2019-11-23 20:43:19,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:43:19,973 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:19,973 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 20:43:20,177 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:20,177 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:20,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:20,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1749813085, now seen corresponding path program 1 times [2019-11-23 20:43:20,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:20,178 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246375179] [2019-11-23 20:43:20,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:20,182 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:20,183 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041174685] [2019-11-23 20:43:20,183 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 20:43:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:43:20,224 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:43:20,226 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:20,259 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 20:43:20,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246375179] [2019-11-23 20:43:20,260 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:20,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041174685] [2019-11-23 20:43:20,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:43:20,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 20:43:20,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407871413] [2019-11-23 20:43:20,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:43:20,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:20,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:43:20,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:43:20,262 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 6 states. [2019-11-23 20:43:20,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:20,365 INFO L93 Difference]: Finished difference Result 83 states and 103 transitions. [2019-11-23 20:43:20,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:43:20,366 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2019-11-23 20:43:20,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:20,367 INFO L225 Difference]: With dead ends: 83 [2019-11-23 20:43:20,367 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:43:20,368 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 20:43:20,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:43:20,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2019-11-23 20:43:20,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 20:43:20,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2019-11-23 20:43:20,376 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 27 [2019-11-23 20:43:20,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:20,376 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2019-11-23 20:43:20,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:43:20,376 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2019-11-23 20:43:20,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:43:20,377 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:20,377 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 20:43:20,580 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:20,581 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:20,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:20,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1516282694, now seen corresponding path program 2 times [2019-11-23 20:43:20,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:20,583 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323219725] [2019-11-23 20:43:20,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:20,588 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:20,588 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487106521] [2019-11-23 20:43:20,588 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 20:43:20,640 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:43:20,640 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:43:20,641 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:43:20,643 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:20,701 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 20:43:20,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323219725] [2019-11-23 20:43:20,702 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:20,702 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487106521] [2019-11-23 20:43:20,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:43:20,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 20:43:20,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475854260] [2019-11-23 20:43:20,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:43:20,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:20,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:43:20,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:43:20,704 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 7 states. [2019-11-23 20:43:20,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:20,827 INFO L93 Difference]: Finished difference Result 95 states and 116 transitions. [2019-11-23 20:43:20,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:43:20,828 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-23 20:43:20,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:20,829 INFO L225 Difference]: With dead ends: 95 [2019-11-23 20:43:20,829 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 20:43:20,833 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 20:43:20,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 20:43:20,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2019-11-23 20:43:20,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:43:20,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2019-11-23 20:43:20,846 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 29 [2019-11-23 20:43:20,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:20,847 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2019-11-23 20:43:20,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:43:20,847 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2019-11-23 20:43:20,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:43:20,851 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:20,851 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 20:43:21,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:21,055 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:21,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:21,056 INFO L82 PathProgramCache]: Analyzing trace with hash 53106109, now seen corresponding path program 3 times [2019-11-23 20:43:21,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:21,056 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841669612] [2019-11-23 20:43:21,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:21,061 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:21,061 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [239878147] [2019-11-23 20:43:21,061 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 20:43:21,104 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:43:21,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:43:21,105 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:43:21,107 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:21,138 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 20:43:21,138 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841669612] [2019-11-23 20:43:21,139 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:21,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239878147] [2019-11-23 20:43:21,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:43:21,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:43:21,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910218225] [2019-11-23 20:43:21,140 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:43:21,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:21,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:43:21,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:43:21,141 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 5 states. [2019-11-23 20:43:21,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:21,238 INFO L93 Difference]: Finished difference Result 157 states and 196 transitions. [2019-11-23 20:43:21,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:43:21,238 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2019-11-23 20:43:21,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:21,241 INFO L225 Difference]: With dead ends: 157 [2019-11-23 20:43:21,241 INFO L226 Difference]: Without dead ends: 124 [2019-11-23 20:43:21,242 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 20:43:21,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-11-23 20:43:21,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 66. [2019-11-23 20:43:21,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:43:21,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2019-11-23 20:43:21,255 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 31 [2019-11-23 20:43:21,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:21,255 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2019-11-23 20:43:21,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:43:21,255 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2019-11-23 20:43:21,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:43:21,256 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:21,257 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 20:43:21,460 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:21,461 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:21,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:21,461 INFO L82 PathProgramCache]: Analyzing trace with hash -893728359, now seen corresponding path program 4 times [2019-11-23 20:43:21,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:21,461 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474043540] [2019-11-23 20:43:21,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:21,470 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:21,470 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062333456] [2019-11-23 20:43:21,470 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 [2019-11-23 20:43:21,546 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:43:21,546 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:43:21,547 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:43:21,557 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:21,617 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:43:21,617 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474043540] [2019-11-23 20:43:21,617 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:21,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062333456] [2019-11-23 20:43:21,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:43:21,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 20:43:21,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394426573] [2019-11-23 20:43:21,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:43:21,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:21,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:43:21,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:43:21,619 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand 7 states. [2019-11-23 20:43:21,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:21,821 INFO L93 Difference]: Finished difference Result 235 states and 286 transitions. [2019-11-23 20:43:21,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:43:21,822 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2019-11-23 20:43:21,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:21,823 INFO L225 Difference]: With dead ends: 235 [2019-11-23 20:43:21,823 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 20:43:21,824 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:43:21,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 20:43:21,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 117. [2019-11-23 20:43:21,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-11-23 20:43:21,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 143 transitions. [2019-11-23 20:43:21,843 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 143 transitions. Word has length 51 [2019-11-23 20:43:21,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:21,843 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 143 transitions. [2019-11-23 20:43:21,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:43:21,843 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 143 transitions. [2019-11-23 20:43:21,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-23 20:43:21,844 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:21,844 INFO L410 BasicCegarLoop]: trace histogram [16, 12, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:43:22,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:22,047 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:22,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:22,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1340308512, now seen corresponding path program 5 times [2019-11-23 20:43:22,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:22,048 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295573129] [2019-11-23 20:43:22,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:22,055 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:22,055 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [159043093] [2019-11-23 20:43:22,055 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 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