/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-multidimensional/add-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:27:46,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:27:46,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:27:46,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:27:46,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:27:46,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:27:46,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:27:46,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:27:46,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:27:46,137 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:27:46,138 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:27:46,139 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:27:46,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:27:46,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:27:46,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:27:46,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:27:46,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:27:46,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:27:46,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:27:46,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:27:46,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:27:46,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:27:46,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:27:46,157 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:27:46,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:27:46,180 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 22:27:46,184 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 22:27:46,186 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 22:27:46,187 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 22:27:46,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 22:27:46,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 22:27:46,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 22:27:46,190 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 22:27:46,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:27:46,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:27:46,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:27:46,194 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:27:46,248 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:27:46,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:27:46,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:27:46,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:27:46,254 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:27:46,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:27:46,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:27:46,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:27:46,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:27:46,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:27:46,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:27:46,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:27:46,256 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:27:46,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:27:46,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:27:46,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:27:46,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:27:46,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:27:46,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:27:46,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:27:46,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:27:46,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:27:46,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:27:46,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:27:46,259 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:27:46,259 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:27:46,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:27:46,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:27:46,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:27:46,676 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:27:46,677 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:27:46,678 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/add-2-n-u.c [2020-12-21 22:27:46,772 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b3630293/9d55b87926b34635873493281083674f/FLAG749bc0306 [2020-12-21 22:27:47,319 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:27:47,320 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/add-2-n-u.c [2020-12-21 22:27:47,327 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b3630293/9d55b87926b34635873493281083674f/FLAG749bc0306 [2020-12-21 22:27:47,691 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b3630293/9d55b87926b34635873493281083674f [2020-12-21 22:27:47,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:27:47,703 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:27:47,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:27:47,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:27:47,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:27:47,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:27:47" (1/1) ... [2020-12-21 22:27:47,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64d84841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:47, skipping insertion in model container [2020-12-21 22:27:47,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:27:47" (1/1) ... [2020-12-21 22:27:47,725 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:27:47,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:27:47,880 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/add-2-n-u.c[321,334] [2020-12-21 22:27:47,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:27:47,912 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:27:47,925 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/add-2-n-u.c[321,334] [2020-12-21 22:27:47,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:27:47,954 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:27:47,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:47 WrapperNode [2020-12-21 22:27:47,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:27:47,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:27:47,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:27:47,957 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:27:47,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:47" (1/1) ... [2020-12-21 22:27:47,974 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:47" (1/1) ... [2020-12-21 22:27:47,999 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:27:48,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:27:48,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:27:48,001 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:27:48,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:47" (1/1) ... [2020-12-21 22:27:48,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:47" (1/1) ... [2020-12-21 22:27:48,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:47" (1/1) ... [2020-12-21 22:27:48,014 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:47" (1/1) ... [2020-12-21 22:27:48,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:47" (1/1) ... [2020-12-21 22:27:48,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:47" (1/1) ... [2020-12-21 22:27:48,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:47" (1/1) ... [2020-12-21 22:27:48,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:27:48,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:27:48,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:27:48,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:27:48,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:47" (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 [2020-12-21 22:27:48,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:27:48,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:27:48,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:27:48,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:27:48,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:27:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:27:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:27:48,523 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:27:48,523 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-21 22:27:48,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:27:48 BoogieIcfgContainer [2020-12-21 22:27:48,529 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:27:48,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:27:48,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:27:48,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:27:48,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:27:47" (1/3) ... [2020-12-21 22:27:48,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@776b75b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:27:48, skipping insertion in model container [2020-12-21 22:27:48,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:27:47" (2/3) ... [2020-12-21 22:27:48,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@776b75b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:27:48, skipping insertion in model container [2020-12-21 22:27:48,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:27:48" (3/3) ... [2020-12-21 22:27:48,558 INFO L111 eAbstractionObserver]: Analyzing ICFG add-2-n-u.c [2020-12-21 22:27:48,571 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:27:48,583 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:27:48,631 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:27:48,669 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:27:48,672 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:27:48,676 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:27:48,676 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:27:48,676 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:27:48,676 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:27:48,677 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:27:48,677 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:27:48,694 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-21 22:27:48,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-21 22:27:48,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:48,706 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:27:48,711 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:48,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:48,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1817636276, now seen corresponding path program 1 times [2020-12-21 22:27:48,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:48,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620630372] [2020-12-21 22:27:48,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:48,825 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:27:48,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027047842] [2020-12-21 22:27:48,826 INFO L95 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 [2020-12-21 22:27:48,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:27:48,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:27:48,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:27:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:27:49,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620630372] [2020-12-21 22:27:49,037 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:27:49,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027047842] [2020-12-21 22:27:49,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:27:49,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:27:49,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714770120] [2020-12-21 22:27:49,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:27:49,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:49,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:27:49,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:27:49,066 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2020-12-21 22:27:49,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:49,124 INFO L93 Difference]: Finished difference Result 43 states and 71 transitions. [2020-12-21 22:27:49,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:27:49,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-21 22:27:49,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:49,136 INFO L225 Difference]: With dead ends: 43 [2020-12-21 22:27:49,137 INFO L226 Difference]: Without dead ends: 20 [2020-12-21 22:27:49,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:27:49,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-21 22:27:49,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-12-21 22:27:49,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-21 22:27:49,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2020-12-21 22:27:49,183 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 10 [2020-12-21 22:27:49,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:49,184 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2020-12-21 22:27:49,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:27:49,184 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2020-12-21 22:27:49,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-21 22:27:49,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:49,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:27:49,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-21 22:27:49,400 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:49,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:49,402 INFO L82 PathProgramCache]: Analyzing trace with hash 429030367, now seen corresponding path program 1 times [2020-12-21 22:27:49,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:49,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292524458] [2020-12-21 22:27:49,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:49,417 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:27:49,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550917425] [2020-12-21 22:27:49,418 INFO L95 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 [2020-12-21 22:27:49,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:27:49,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:27:49,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:27:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:27:49,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292524458] [2020-12-21 22:27:49,517 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:27:49,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550917425] [2020-12-21 22:27:49,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:27:49,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:27:49,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905642540] [2020-12-21 22:27:49,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:27:49,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:49,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:27:49,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:27:49,522 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand 4 states. [2020-12-21 22:27:49,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:49,579 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2020-12-21 22:27:49,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:27:49,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-21 22:27:49,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:49,582 INFO L225 Difference]: With dead ends: 43 [2020-12-21 22:27:49,582 INFO L226 Difference]: Without dead ends: 28 [2020-12-21 22:27:49,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:27:49,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-21 22:27:49,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2020-12-21 22:27:49,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-21 22:27:49,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2020-12-21 22:27:49,591 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 13 [2020-12-21 22:27:49,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:49,591 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2020-12-21 22:27:49,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:27:49,592 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2020-12-21 22:27:49,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 22:27:49,593 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:49,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:27:49,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:27:49,808 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:49,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:49,810 INFO L82 PathProgramCache]: Analyzing trace with hash -270581085, now seen corresponding path program 1 times [2020-12-21 22:27:49,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:49,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463966541] [2020-12-21 22:27:49,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:49,823 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:27:49,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816468800] [2020-12-21 22:27:49,824 INFO L95 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 [2020-12-21 22:27:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:27:49,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:27:49,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:27:49,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:27:49,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463966541] [2020-12-21 22:27:49,967 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:27:49,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816468800] [2020-12-21 22:27:49,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:27:49,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:27:49,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224358073] [2020-12-21 22:27:49,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:27:49,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:49,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:27:49,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:27:49,971 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 5 states. [2020-12-21 22:27:50,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:50,032 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-12-21 22:27:50,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:27:50,033 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-21 22:27:50,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:50,037 INFO L225 Difference]: With dead ends: 53 [2020-12-21 22:27:50,037 INFO L226 Difference]: Without dead ends: 35 [2020-12-21 22:27:50,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:27:50,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-21 22:27:50,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2020-12-21 22:27:50,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 22:27:50,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-12-21 22:27:50,046 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2020-12-21 22:27:50,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:50,046 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-12-21 22:27:50,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:27:50,046 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-12-21 22:27:50,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 22:27:50,047 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:50,047 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:27:50,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:27:50,263 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:50,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:50,264 INFO L82 PathProgramCache]: Analyzing trace with hash -483699617, now seen corresponding path program 2 times [2020-12-21 22:27:50,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:50,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565491753] [2020-12-21 22:27:50,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:50,277 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:27:50,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279736275] [2020-12-21 22:27:50,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-12-21 22:27:50,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 22:27:50,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:27:50,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:27:50,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:27:50,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:27:50,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565491753] [2020-12-21 22:27:50,417 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:27:50,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279736275] [2020-12-21 22:27:50,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:27:50,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:27:50,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766196787] [2020-12-21 22:27:50,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:27:50,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:50,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:27:50,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:27:50,422 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 4 states. [2020-12-21 22:27:50,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:50,469 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2020-12-21 22:27:50,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:27:50,470 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-12-21 22:27:50,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:50,471 INFO L225 Difference]: With dead ends: 58 [2020-12-21 22:27:50,471 INFO L226 Difference]: Without dead ends: 46 [2020-12-21 22:27:50,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:27:50,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-21 22:27:50,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 27. [2020-12-21 22:27:50,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-21 22:27:50,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-12-21 22:27:50,480 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 15 [2020-12-21 22:27:50,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:50,480 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-12-21 22:27:50,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:27:50,481 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-12-21 22:27:50,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 22:27:50,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:50,482 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:27:50,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:27:50,696 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:50,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:50,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1009156328, now seen corresponding path program 1 times [2020-12-21 22:27:50,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:50,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817840035] [2020-12-21 22:27:50,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:50,711 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:27:50,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060629044] [2020-12-21 22:27:50,712 INFO L95 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 [2020-12-21 22:27:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:27:50,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:27:50,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:27:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:27:50,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817840035] [2020-12-21 22:27:50,828 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:27:50,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060629044] [2020-12-21 22:27:50,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:27:50,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:27:50,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601494580] [2020-12-21 22:27:50,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:27:50,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:50,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:27:50,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:27:50,831 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 6 states. [2020-12-21 22:27:50,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:50,897 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2020-12-21 22:27:50,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:27:50,898 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-12-21 22:27:50,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:50,899 INFO L225 Difference]: With dead ends: 65 [2020-12-21 22:27:50,899 INFO L226 Difference]: Without dead ends: 41 [2020-12-21 22:27:50,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:27:50,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-21 22:27:50,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2020-12-21 22:27:50,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-21 22:27:50,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-12-21 22:27:50,908 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 20 [2020-12-21 22:27:50,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:50,909 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-12-21 22:27:50,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:27:50,909 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-12-21 22:27:50,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-21 22:27:50,910 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:50,910 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:27:51,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:27:51,125 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:51,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:51,127 INFO L82 PathProgramCache]: Analyzing trace with hash 923115154, now seen corresponding path program 2 times [2020-12-21 22:27:51,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:51,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711020234] [2020-12-21 22:27:51,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:51,138 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:27:51,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082268826] [2020-12-21 22:27:51,139 INFO L93 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 [2020-12-21 22:27:51,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:27:51,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:27:51,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:27:51,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:27:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 22:27:51,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711020234] [2020-12-21 22:27:51,298 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:27:51,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082268826] [2020-12-21 22:27:51,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:27:51,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:27:51,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202525370] [2020-12-21 22:27:51,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:27:51,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:51,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:27:51,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:27:51,301 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-12-21 22:27:51,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:51,380 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2020-12-21 22:27:51,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:27:51,381 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-12-21 22:27:51,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:51,382 INFO L225 Difference]: With dead ends: 77 [2020-12-21 22:27:51,382 INFO L226 Difference]: Without dead ends: 48 [2020-12-21 22:27:51,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:27:51,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-21 22:27:51,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-12-21 22:27:51,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-21 22:27:51,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-12-21 22:27:51,391 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 22 [2020-12-21 22:27:51,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:51,391 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-12-21 22:27:51,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:27:51,391 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-12-21 22:27:51,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-21 22:27:51,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:51,392 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:27:51,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:27:51,606 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:51,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:51,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1541106392, now seen corresponding path program 3 times [2020-12-21 22:27:51,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:51,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523045744] [2020-12-21 22:27:51,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:51,617 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:27:51,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919288328] [2020-12-21 22:27:51,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:27:51,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:27:51,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:27:51,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:27:51,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:27:51,748 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-21 22:27:51,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523045744] [2020-12-21 22:27:51,749 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:27:51,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919288328] [2020-12-21 22:27:51,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:27:51,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:27:51,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611549328] [2020-12-21 22:27:51,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:27:51,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:51,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:27:51,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:27:51,751 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 5 states. [2020-12-21 22:27:51,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:51,842 INFO L93 Difference]: Finished difference Result 124 states and 152 transitions. [2020-12-21 22:27:51,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:27:51,843 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-12-21 22:27:51,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:51,848 INFO L225 Difference]: With dead ends: 124 [2020-12-21 22:27:51,848 INFO L226 Difference]: Without dead ends: 97 [2020-12-21 22:27:51,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:27:51,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-21 22:27:51,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 51. [2020-12-21 22:27:51,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-21 22:27:51,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-12-21 22:27:51,872 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 24 [2020-12-21 22:27:51,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:51,872 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-12-21 22:27:51,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:27:51,872 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-12-21 22:27:51,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-21 22:27:51,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:51,874 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:27:52,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:27:52,083 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:52,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:52,085 INFO L82 PathProgramCache]: Analyzing trace with hash -57445772, now seen corresponding path program 4 times [2020-12-21 22:27:52,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:52,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51294553] [2020-12-21 22:27:52,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:52,095 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:27:52,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896739631] [2020-12-21 22:27:52,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:27:53,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:27:53,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:27:53,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:27:53,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:27:53,229 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-12-21 22:27:53,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51294553] [2020-12-21 22:27:53,231 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:27:53,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896739631] [2020-12-21 22:27:53,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:27:53,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:27:53,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543118807] [2020-12-21 22:27:53,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:27:53,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:27:53,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:27:53,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:27:53,235 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 8 states. [2020-12-21 22:27:53,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:27:53,309 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2020-12-21 22:27:53,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:27:53,310 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-12-21 22:27:53,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:27:53,311 INFO L225 Difference]: With dead ends: 114 [2020-12-21 22:27:53,311 INFO L226 Difference]: Without dead ends: 71 [2020-12-21 22:27:53,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:27:53,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-21 22:27:53,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-12-21 22:27:53,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-21 22:27:53,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2020-12-21 22:27:53,321 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 38 [2020-12-21 22:27:53,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:27:53,322 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2020-12-21 22:27:53,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:27:53,322 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2020-12-21 22:27:53,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-21 22:27:53,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:27:53,323 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:27:53,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-21 22:27:53,532 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:27:53,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:27:53,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1601697520, now seen corresponding path program 5 times [2020-12-21 22:27:53,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:27:53,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348114969] [2020-12-21 22:27:53,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:27:53,545 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:27:53,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137570682] [2020-12-21 22:27:53,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true