/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/diff-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:40:49,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:40:49,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:40:49,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:40:49,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:40:49,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:40:49,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:40:49,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:40:49,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:40:49,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:40:49,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:40:49,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:40:49,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:40:49,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:40:49,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:40:49,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:40:49,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:40:49,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:40:49,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:40:49,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:40:49,908 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:40:49,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:40:49,910 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:40:49,911 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:40:49,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:40:49,916 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:40:49,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:40:49,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:40:49,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:40:49,919 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:40:49,919 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:40:49,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:40:49,920 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:40:49,920 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:40:49,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:40:49,922 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:40:49,922 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 20:40:49,936 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:40:49,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:40:49,938 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:40:49,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:40:49,938 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:40:49,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:40:49,939 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:40:49,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:40:49,939 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:40:49,939 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:40:49,939 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:40:49,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:40:49,940 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:40:49,940 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:40:49,940 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:40:49,940 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:40:49,941 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:40:49,941 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:40:49,941 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:40:49,941 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:40:49,941 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:40:49,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:40:49,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:40:49,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:40:49,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:40:49,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:40:49,943 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:40:49,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:40:49,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:40:49,943 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:40:50,228 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:40:50,249 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:40:50,253 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:40:50,257 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:40:50,258 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:40:50,259 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/diff-3-n-u.c [2019-11-23 20:40:50,329 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6656fdd8f/9c41a84e631f4aa3ade0ba26f8f413cf/FLAGdac732bbf [2019-11-23 20:40:50,759 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:40:50,760 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/diff-3-n-u.c [2019-11-23 20:40:50,766 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6656fdd8f/9c41a84e631f4aa3ade0ba26f8f413cf/FLAGdac732bbf [2019-11-23 20:40:51,181 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6656fdd8f/9c41a84e631f4aa3ade0ba26f8f413cf [2019-11-23 20:40:51,192 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:40:51,193 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:40:51,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:40:51,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:40:51,200 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:40:51,201 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:40:51" (1/1) ... [2019-11-23 20:40:51,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@225b5edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:51, skipping insertion in model container [2019-11-23 20:40:51,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:40:51" (1/1) ... [2019-11-23 20:40:51,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:40:51,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:40:51,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:40:51,442 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:40:51,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:40:51,487 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:40:51,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:51 WrapperNode [2019-11-23 20:40:51,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:40:51,489 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:40:51,489 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:40:51,489 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:40:51,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:51" (1/1) ... [2019-11-23 20:40:51,587 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:51" (1/1) ... [2019-11-23 20:40:51,612 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:40:51,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:40:51,613 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:40:51,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:40:51,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:51" (1/1) ... [2019-11-23 20:40:51,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:51" (1/1) ... [2019-11-23 20:40:51,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:51" (1/1) ... [2019-11-23 20:40:51,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:51" (1/1) ... [2019-11-23 20:40:51,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:51" (1/1) ... [2019-11-23 20:40:51,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:51" (1/1) ... [2019-11-23 20:40:51,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:51" (1/1) ... [2019-11-23 20:40:51,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:40:51,642 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:40:51,642 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:40:51,642 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:40:51,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:51" (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 20:40:51,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:40:51,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:40:51,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:40:51,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:40:51,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:40:51,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:40:52,026 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:40:52,026 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 20:40:52,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:40:52 BoogieIcfgContainer [2019-11-23 20:40:52,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:40:52,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:40:52,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:40:52,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:40:52,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:40:51" (1/3) ... [2019-11-23 20:40:52,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc0d6e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:40:52, skipping insertion in model container [2019-11-23 20:40:52,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:51" (2/3) ... [2019-11-23 20:40:52,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc0d6e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:40:52, skipping insertion in model container [2019-11-23 20:40:52,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:40:52" (3/3) ... [2019-11-23 20:40:52,034 INFO L109 eAbstractionObserver]: Analyzing ICFG diff-3-n-u.c [2019-11-23 20:40:52,042 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:40:52,047 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:40:52,057 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:40:52,076 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:40:52,076 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:40:52,076 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:40:52,077 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:40:52,077 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:40:52,077 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:40:52,077 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:40:52,077 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:40:52,089 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-23 20:40:52,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:40:52,094 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:52,095 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:52,095 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:52,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:52,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1568356865, now seen corresponding path program 1 times [2019-11-23 20:40:52,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:52,108 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614389312] [2019-11-23 20:40:52,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:52,174 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:52,175 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587823953] [2019-11-23 20:40:52,175 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 20:40:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:52,242 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-23 20:40:52,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:52,264 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 20:40:52,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614389312] [2019-11-23 20:40:52,266 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:52,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587823953] [2019-11-23 20:40:52,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:40:52,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:40:52,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257385892] [2019-11-23 20:40:52,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:40:52,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:52,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:40:52,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:40:52,286 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2019-11-23 20:40:52,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:52,303 INFO L93 Difference]: Finished difference Result 52 states and 88 transitions. [2019-11-23 20:40:52,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:40:52,304 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-11-23 20:40:52,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:52,311 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:40:52,312 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 20:40:52,314 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 20:40:52,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 20:40:52,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-23 20:40:52,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 20:40:52,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2019-11-23 20:40:52,344 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 11 [2019-11-23 20:40:52,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:52,345 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2019-11-23 20:40:52,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:40:52,345 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2019-11-23 20:40:52,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:40:52,346 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:52,346 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:52,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:52,548 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:52,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:52,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1115669473, now seen corresponding path program 1 times [2019-11-23 20:40:52,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:52,550 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325918056] [2019-11-23 20:40:52,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:52,557 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:52,558 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87772988] [2019-11-23 20:40:52,558 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 20:40:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:52,615 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:40:52,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:52,667 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 20:40:52,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325918056] [2019-11-23 20:40:52,668 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:52,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87772988] [2019-11-23 20:40:52,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:40:52,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:40:52,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346883205] [2019-11-23 20:40:52,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:40:52,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:52,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:40:52,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:40:52,672 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 3 states. [2019-11-23 20:40:52,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:52,716 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2019-11-23 20:40:52,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:40:52,716 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-23 20:40:52,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:52,717 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:40:52,718 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 20:40:52,718 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 20:40:52,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 20:40:52,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2019-11-23 20:40:52,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:40:52,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2019-11-23 20:40:52,725 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 11 [2019-11-23 20:40:52,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:52,725 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2019-11-23 20:40:52,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:40:52,725 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2019-11-23 20:40:52,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:40:52,726 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:52,726 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:52,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:52,927 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:52,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:52,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1536116311, now seen corresponding path program 1 times [2019-11-23 20:40:52,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:52,929 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176560236] [2019-11-23 20:40:52,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:52,938 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:52,939 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [560489301] [2019-11-23 20:40:52,939 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 20:40:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:52,991 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:40:52,993 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:53,017 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 20:40:53,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176560236] [2019-11-23 20:40:53,018 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:53,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560489301] [2019-11-23 20:40:53,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:40:53,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:40:53,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549275752] [2019-11-23 20:40:53,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:40:53,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:53,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:40:53,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:40:53,021 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand 4 states. [2019-11-23 20:40:53,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:53,128 INFO L93 Difference]: Finished difference Result 61 states and 84 transitions. [2019-11-23 20:40:53,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:40:53,130 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-23 20:40:53,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:53,131 INFO L225 Difference]: With dead ends: 61 [2019-11-23 20:40:53,132 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 20:40:53,132 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 20:40:53,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 20:40:53,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2019-11-23 20:40:53,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:40:53,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2019-11-23 20:40:53,146 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 14 [2019-11-23 20:40:53,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:53,146 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2019-11-23 20:40:53,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:40:53,146 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2019-11-23 20:40:53,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:40:53,148 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:53,148 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 20:40:53,350 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:53,351 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:53,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:53,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1209800511, now seen corresponding path program 1 times [2019-11-23 20:40:53,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:53,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858113856] [2019-11-23 20:40:53,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:53,359 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:53,360 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1758685155] [2019-11-23 20:40:53,360 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 20:40:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:53,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:40:53,412 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:53,432 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 20:40:53,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858113856] [2019-11-23 20:40:53,433 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:53,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758685155] [2019-11-23 20:40:53,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:40:53,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:40:53,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755986795] [2019-11-23 20:40:53,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:40:53,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:53,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:40:53,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:40:53,435 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 4 states. [2019-11-23 20:40:53,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:53,534 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2019-11-23 20:40:53,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:40:53,534 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-23 20:40:53,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:53,535 INFO L225 Difference]: With dead ends: 61 [2019-11-23 20:40:53,536 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 20:40:53,537 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 20:40:53,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 20:40:53,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2019-11-23 20:40:53,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:40:53,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2019-11-23 20:40:53,546 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2019-11-23 20:40:53,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:53,547 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2019-11-23 20:40:53,547 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:40:53,547 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2019-11-23 20:40:53,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:40:53,548 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:53,548 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 20:40:53,751 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:53,751 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:53,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:53,752 INFO L82 PathProgramCache]: Analyzing trace with hash -97783142, now seen corresponding path program 1 times [2019-11-23 20:40:53,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:53,752 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461216884] [2019-11-23 20:40:53,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:53,756 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:53,756 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724945731] [2019-11-23 20:40:53,757 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 20:40:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:53,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:40:53,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:53,838 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 20:40:53,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461216884] [2019-11-23 20:40:53,839 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:53,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724945731] [2019-11-23 20:40:53,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:53,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:40:53,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385791311] [2019-11-23 20:40:53,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:40:53,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:53,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:40:53,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:40:53,841 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 5 states. [2019-11-23 20:40:53,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:53,974 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2019-11-23 20:40:53,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:40:53,974 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-11-23 20:40:53,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:53,975 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:40:53,976 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 20:40:53,977 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 20:40:53,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 20:40:53,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2019-11-23 20:40:53,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 20:40:53,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2019-11-23 20:40:53,996 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2019-11-23 20:40:53,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:53,999 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2019-11-23 20:40:53,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:40:53,999 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2019-11-23 20:40:54,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:40:54,000 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:54,000 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 20:40:54,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:54,205 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:54,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:54,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1978170721, now seen corresponding path program 2 times [2019-11-23 20:40:54,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:54,206 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700882430] [2019-11-23 20:40:54,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:54,211 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:54,211 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27284683] [2019-11-23 20:40:54,211 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 20:40:54,253 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:40:54,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:54,254 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:40:54,256 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:54,268 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 20:40:54,269 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700882430] [2019-11-23 20:40:54,269 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:54,269 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27284683] [2019-11-23 20:40:54,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:40:54,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:40:54,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868358850] [2019-11-23 20:40:54,270 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:40:54,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:54,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:40:54,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:40:54,271 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 4 states. [2019-11-23 20:40:54,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:54,315 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2019-11-23 20:40:54,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:40:54,316 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-23 20:40:54,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:54,317 INFO L225 Difference]: With dead ends: 79 [2019-11-23 20:40:54,317 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:40:54,318 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 20:40:54,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:40:54,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 36. [2019-11-23 20:40:54,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:40:54,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2019-11-23 20:40:54,326 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 19 [2019-11-23 20:40:54,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:54,326 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2019-11-23 20:40:54,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:40:54,327 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2019-11-23 20:40:54,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:40:54,327 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:54,328 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 20:40:54,539 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:54,539 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:54,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:54,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1749813085, now seen corresponding path program 1 times [2019-11-23 20:40:54,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:54,540 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602185801] [2019-11-23 20:40:54,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:54,546 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:54,547 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1180278438] [2019-11-23 20:40:54,547 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 20:40:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:54,599 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:40:54,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:54,649 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 20:40:54,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602185801] [2019-11-23 20:40:54,649 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:54,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180278438] [2019-11-23 20:40:54,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:54,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 20:40:54,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123854212] [2019-11-23 20:40:54,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:40:54,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:54,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:40:54,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:40:54,652 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 6 states. [2019-11-23 20:40:54,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:54,737 INFO L93 Difference]: Finished difference Result 83 states and 103 transitions. [2019-11-23 20:40:54,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:40:54,738 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2019-11-23 20:40:54,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:54,738 INFO L225 Difference]: With dead ends: 83 [2019-11-23 20:40:54,738 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:40:54,739 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 20:40:54,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:40:54,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2019-11-23 20:40:54,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 20:40:54,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2019-11-23 20:40:54,747 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 27 [2019-11-23 20:40:54,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:54,748 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2019-11-23 20:40:54,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:40:54,748 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2019-11-23 20:40:54,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:40:54,749 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:54,749 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 20:40:54,953 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:54,953 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:54,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:54,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1516282694, now seen corresponding path program 2 times [2019-11-23 20:40:54,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:54,954 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749878259] [2019-11-23 20:40:54,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:54,959 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:54,959 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663087615] [2019-11-23 20:40:54,959 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 20:40:55,013 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:40:55,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:55,015 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:40:55,016 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:55,058 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 20:40:55,058 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749878259] [2019-11-23 20:40:55,058 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:55,058 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663087615] [2019-11-23 20:40:55,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:55,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 20:40:55,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885596332] [2019-11-23 20:40:55,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:40:55,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:55,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:40:55,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:40:55,061 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 7 states. [2019-11-23 20:40:55,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:55,165 INFO L93 Difference]: Finished difference Result 95 states and 116 transitions. [2019-11-23 20:40:55,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:40:55,165 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-23 20:40:55,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:55,166 INFO L225 Difference]: With dead ends: 95 [2019-11-23 20:40:55,166 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 20:40:55,170 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 20:40:55,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 20:40:55,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2019-11-23 20:40:55,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:40:55,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2019-11-23 20:40:55,181 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 29 [2019-11-23 20:40:55,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:55,182 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2019-11-23 20:40:55,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:40:55,182 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2019-11-23 20:40:55,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:40:55,187 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:55,187 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 20:40:55,392 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:55,392 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:55,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:55,393 INFO L82 PathProgramCache]: Analyzing trace with hash 53106109, now seen corresponding path program 3 times [2019-11-23 20:40:55,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:55,393 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297285112] [2019-11-23 20:40:55,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:55,400 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:55,401 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279255561] [2019-11-23 20:40:55,401 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 20:40:55,446 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:40:55,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:55,447 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:40:55,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:55,498 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 20:40:55,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297285112] [2019-11-23 20:40:55,499 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:55,499 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279255561] [2019-11-23 20:40:55,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:55,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:40:55,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978402481] [2019-11-23 20:40:55,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:40:55,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:55,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:40:55,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:40:55,500 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 5 states. [2019-11-23 20:40:55,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:55,570 INFO L93 Difference]: Finished difference Result 157 states and 196 transitions. [2019-11-23 20:40:55,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:40:55,571 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2019-11-23 20:40:55,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:55,574 INFO L225 Difference]: With dead ends: 157 [2019-11-23 20:40:55,574 INFO L226 Difference]: Without dead ends: 124 [2019-11-23 20:40:55,574 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 20:40:55,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-11-23 20:40:55,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 66. [2019-11-23 20:40:55,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:40:55,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2019-11-23 20:40:55,588 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 31 [2019-11-23 20:40:55,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:55,589 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2019-11-23 20:40:55,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:40:55,589 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2019-11-23 20:40:55,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:40:55,590 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:55,590 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 20:40:55,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:55,802 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:55,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:55,802 INFO L82 PathProgramCache]: Analyzing trace with hash -893728359, now seen corresponding path program 4 times [2019-11-23 20:40:55,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:55,803 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735923219] [2019-11-23 20:40:55,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:55,809 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:55,810 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611498895] [2019-11-23 20:40:55,810 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