/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/diff-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:28:44,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:28:44,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:28:44,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:28:44,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:28:44,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:28:44,191 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:28:44,200 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:28:44,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:28:44,210 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:28:44,211 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:28:44,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:28:44,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:28:44,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:28:44,219 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:28:44,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:28:44,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:28:44,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:28:44,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:28:44,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:28:44,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:28:44,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:28:44,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:28:44,254 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:28:44,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:28:44,269 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 22:28:44,270 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 22:28:44,272 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 22:28:44,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 22:28:44,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 22:28:44,275 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 22:28:44,275 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 22:28:44,276 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 22:28:44,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:28:44,277 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:28:44,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:28:44,279 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:28:44,333 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:28:44,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:28:44,338 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:28:44,338 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:28:44,339 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:28:44,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:28:44,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:28:44,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:28:44,340 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:28:44,340 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:28:44,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:28:44,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:28:44,363 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:28:44,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:28:44,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:28:44,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:28:44,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:28:44,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:28:44,366 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:28:44,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:28:44,367 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:28:44,369 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:28:44,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:28:44,370 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:28:44,370 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:28:44,370 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:28:44,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:28:44,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:28:44,872 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:28:44,873 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:28:44,874 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:28:44,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/diff-2-n-u.c [2020-12-21 22:28:44,965 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ba1a3a77/98cc18a676b747bea5e0909ef4f112d8/FLAGecb7daff6 [2020-12-21 22:28:45,659 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:28:45,660 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/diff-2-n-u.c [2020-12-21 22:28:45,668 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ba1a3a77/98cc18a676b747bea5e0909ef4f112d8/FLAGecb7daff6 [2020-12-21 22:28:46,021 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ba1a3a77/98cc18a676b747bea5e0909ef4f112d8 [2020-12-21 22:28:46,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:28:46,027 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:28:46,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:28:46,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:28:46,033 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:28:46,035 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:28:46" (1/1) ... [2020-12-21 22:28:46,036 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@762cbab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:46, skipping insertion in model container [2020-12-21 22:28:46,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:28:46" (1/1) ... [2020-12-21 22:28:46,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:28:46,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:28:46,250 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/diff-2-n-u.c[322,335] [2020-12-21 22:28:46,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:28:46,289 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:28:46,304 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/diff-2-n-u.c[322,335] [2020-12-21 22:28:46,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:28:46,343 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:28:46,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:46 WrapperNode [2020-12-21 22:28:46,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:28:46,348 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:28:46,348 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:28:46,348 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:28:46,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:46" (1/1) ... [2020-12-21 22:28:46,381 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:46" (1/1) ... [2020-12-21 22:28:46,425 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:28:46,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:28:46,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:28:46,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:28:46,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:46" (1/1) ... [2020-12-21 22:28:46,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:46" (1/1) ... [2020-12-21 22:28:46,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:46" (1/1) ... [2020-12-21 22:28:46,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:46" (1/1) ... [2020-12-21 22:28:46,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:46" (1/1) ... [2020-12-21 22:28:46,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:46" (1/1) ... [2020-12-21 22:28:46,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:46" (1/1) ... [2020-12-21 22:28:46,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:28:46,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:28:46,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:28:46,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:28:46,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:46" (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 22:28:46,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:28:46,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:28:46,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:28:46,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:28:46,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:28:46,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:28:46,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:28:47,192 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:28:47,192 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-21 22:28:47,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:28:47 BoogieIcfgContainer [2020-12-21 22:28:47,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:28:47,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:28:47,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:28:47,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:28:47,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:28:46" (1/3) ... [2020-12-21 22:28:47,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@591d94ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:28:47, skipping insertion in model container [2020-12-21 22:28:47,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:46" (2/3) ... [2020-12-21 22:28:47,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@591d94ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:28:47, skipping insertion in model container [2020-12-21 22:28:47,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:28:47" (3/3) ... [2020-12-21 22:28:47,208 INFO L111 eAbstractionObserver]: Analyzing ICFG diff-2-n-u.c [2020-12-21 22:28:47,224 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:28:47,236 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:28:47,256 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:28:47,282 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:28:47,283 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:28:47,283 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:28:47,283 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:28:47,283 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:28:47,283 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:28:47,284 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:28:47,284 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:28:47,300 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-12-21 22:28:47,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 22:28:47,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:47,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:47,308 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:47,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:47,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1352657881, now seen corresponding path program 1 times [2020-12-21 22:28:47,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:47,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752909343] [2020-12-21 22:28:47,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:47,428 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:47,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344369055] [2020-12-21 22:28:47,429 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 22:28:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:47,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:28:47,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:47,676 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 22:28:47,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752909343] [2020-12-21 22:28:47,677 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:47,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344369055] [2020-12-21 22:28:47,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:28:47,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:28:47,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586307107] [2020-12-21 22:28:47,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:28:47,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:47,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:28:47,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:28:47,710 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-12-21 22:28:47,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:47,809 INFO L93 Difference]: Finished difference Result 51 states and 87 transitions. [2020-12-21 22:28:47,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:28:47,812 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-21 22:28:47,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:47,822 INFO L225 Difference]: With dead ends: 51 [2020-12-21 22:28:47,822 INFO L226 Difference]: Without dead ends: 24 [2020-12-21 22:28:47,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 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 22:28:47,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-21 22:28:47,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-12-21 22:28:47,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-21 22:28:47,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2020-12-21 22:28:47,901 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 12 [2020-12-21 22:28:47,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:47,903 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2020-12-21 22:28:47,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:28:47,905 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2020-12-21 22:28:47,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 22:28:47,906 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:47,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:48,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-21 22:28:48,122 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:48,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:48,124 INFO L82 PathProgramCache]: Analyzing trace with hash -68107374, now seen corresponding path program 1 times [2020-12-21 22:28:48,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:48,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344574532] [2020-12-21 22:28:48,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:48,147 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:48,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281600376] [2020-12-21 22:28:48,148 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 22:28:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:48,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:28:48,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:48,301 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 22:28:48,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344574532] [2020-12-21 22:28:48,330 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:48,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281600376] [2020-12-21 22:28:48,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:28:48,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:28:48,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105204692] [2020-12-21 22:28:48,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:28:48,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:48,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:28:48,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:48,343 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand 4 states. [2020-12-21 22:28:48,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:48,490 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-12-21 22:28:48,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:28:48,491 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-12-21 22:28:48,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:48,492 INFO L225 Difference]: With dead ends: 54 [2020-12-21 22:28:48,493 INFO L226 Difference]: Without dead ends: 35 [2020-12-21 22:28:48,494 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 22:28:48,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-21 22:28:48,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2020-12-21 22:28:48,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 22:28:48,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2020-12-21 22:28:48,502 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 15 [2020-12-21 22:28:48,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:48,502 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2020-12-21 22:28:48,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:28:48,503 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2020-12-21 22:28:48,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 22:28:48,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:48,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:48,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:48,718 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:48,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:48,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1915152726, now seen corresponding path program 1 times [2020-12-21 22:28:48,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:48,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23850971] [2020-12-21 22:28:48,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:48,740 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:48,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1073611984] [2020-12-21 22:28:48,741 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 22:28:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:48,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:28:48,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:48,902 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 22:28:48,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23850971] [2020-12-21 22:28:48,903 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:48,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073611984] [2020-12-21 22:28:48,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:48,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:28:48,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185154067] [2020-12-21 22:28:48,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:28:48,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:48,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:28:48,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:28:48,906 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 5 states. [2020-12-21 22:28:49,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:49,054 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2020-12-21 22:28:49,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:28:49,055 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-21 22:28:49,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:49,059 INFO L225 Difference]: With dead ends: 66 [2020-12-21 22:28:49,059 INFO L226 Difference]: Without dead ends: 43 [2020-12-21 22:28:49,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:28:49,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-21 22:28:49,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2020-12-21 22:28:49,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-21 22:28:49,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2020-12-21 22:28:49,086 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 16 [2020-12-21 22:28:49,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:49,086 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2020-12-21 22:28:49,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:28:49,087 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2020-12-21 22:28:49,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 22:28:49,089 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:49,089 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:49,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:49,305 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:49,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:49,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1028293614, now seen corresponding path program 2 times [2020-12-21 22:28:49,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:49,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090374100] [2020-12-21 22:28:49,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:49,318 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:49,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1055674571] [2020-12-21 22:28:49,319 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 22:28:49,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 22:28:49,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:49,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:28:49,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:49,479 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 22:28:49,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090374100] [2020-12-21 22:28:49,480 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:49,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055674571] [2020-12-21 22:28:49,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:28:49,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:28:49,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004314625] [2020-12-21 22:28:49,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:28:49,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:49,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:28:49,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:49,482 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 4 states. [2020-12-21 22:28:49,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:49,605 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2020-12-21 22:28:49,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:28:49,606 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-21 22:28:49,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:49,608 INFO L225 Difference]: With dead ends: 75 [2020-12-21 22:28:49,608 INFO L226 Difference]: Without dead ends: 57 [2020-12-21 22:28:49,609 INFO L677 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 [2020-12-21 22:28:49,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-21 22:28:49,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2020-12-21 22:28:49,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 22:28:49,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-12-21 22:28:49,620 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 17 [2020-12-21 22:28:49,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:49,620 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-12-21 22:28:49,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:28:49,621 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-12-21 22:28:49,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 22:28:49,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:49,622 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:49,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:49,837 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:49,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:49,838 INFO L82 PathProgramCache]: Analyzing trace with hash 883368454, now seen corresponding path program 1 times [2020-12-21 22:28:49,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:49,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758385081] [2020-12-21 22:28:49,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:49,850 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:49,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [957065187] [2020-12-21 22:28:49,850 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 22:28:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:49,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:28:49,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:50,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 22:28:50,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758385081] [2020-12-21 22:28:50,063 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:50,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957065187] [2020-12-21 22:28:50,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:50,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:28:50,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524230994] [2020-12-21 22:28:50,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:28:50,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:50,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:28:50,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:28:50,066 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 6 states. [2020-12-21 22:28:50,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:50,239 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2020-12-21 22:28:50,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:28:50,240 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-12-21 22:28:50,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:50,241 INFO L225 Difference]: With dead ends: 80 [2020-12-21 22:28:50,241 INFO L226 Difference]: Without dead ends: 49 [2020-12-21 22:28:50,242 INFO L677 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 [2020-12-21 22:28:50,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-21 22:28:50,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2020-12-21 22:28:50,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-21 22:28:50,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-12-21 22:28:50,251 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 27 [2020-12-21 22:28:50,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:50,252 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-12-21 22:28:50,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:28:50,252 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-12-21 22:28:50,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-21 22:28:50,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:50,253 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:50,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:50,467 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:50,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:50,468 INFO L82 PathProgramCache]: Analyzing trace with hash -202296780, now seen corresponding path program 2 times [2020-12-21 22:28:50,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:50,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963906670] [2020-12-21 22:28:50,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:50,480 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:50,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889625621] [2020-12-21 22:28:50,481 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 22:28:50,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:28:50,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:50,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:28:50,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-21 22:28:50,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963906670] [2020-12-21 22:28:50,649 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:50,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889625621] [2020-12-21 22:28:50,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:50,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:28:50,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331131270] [2020-12-21 22:28:50,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:28:50,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:50,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:28:50,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:28:50,652 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 7 states. [2020-12-21 22:28:50,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:50,769 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2020-12-21 22:28:50,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:28:50,770 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-12-21 22:28:50,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:50,771 INFO L225 Difference]: With dead ends: 94 [2020-12-21 22:28:50,771 INFO L226 Difference]: Without dead ends: 57 [2020-12-21 22:28:50,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 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 22:28:50,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-21 22:28:50,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2020-12-21 22:28:50,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-21 22:28:50,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2020-12-21 22:28:50,783 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 30 [2020-12-21 22:28:50,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:50,783 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2020-12-21 22:28:50,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:28:50,783 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2020-12-21 22:28:50,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-21 22:28:50,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:50,785 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:50,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:50,999 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:51,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:51,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1717790278, now seen corresponding path program 3 times [2020-12-21 22:28:51,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:51,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106312844] [2020-12-21 22:28:51,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:51,013 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:51,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600867393] [2020-12-21 22:28:51,014 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 22:28:51,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:28:51,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:51,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:28:51,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-21 22:28:51,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106312844] [2020-12-21 22:28:51,164 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:51,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600867393] [2020-12-21 22:28:51,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:51,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:28:51,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675233929] [2020-12-21 22:28:51,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:28:51,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:51,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:28:51,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:28:51,167 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 5 states. [2020-12-21 22:28:51,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:51,281 INFO L93 Difference]: Finished difference Result 155 states and 190 transitions. [2020-12-21 22:28:51,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:28:51,282 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-12-21 22:28:51,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:51,285 INFO L225 Difference]: With dead ends: 155 [2020-12-21 22:28:51,285 INFO L226 Difference]: Without dead ends: 119 [2020-12-21 22:28:51,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 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 22:28:51,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-21 22:28:51,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 67. [2020-12-21 22:28:51,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-21 22:28:51,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2020-12-21 22:28:51,302 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 33 [2020-12-21 22:28:51,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:51,302 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2020-12-21 22:28:51,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:28:51,302 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2020-12-21 22:28:51,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-21 22:28:51,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:51,304 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:51,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:51,519 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:51,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:51,520 INFO L82 PathProgramCache]: Analyzing trace with hash -2059301497, now seen corresponding path program 4 times [2020-12-21 22:28:51,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:51,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332685219] [2020-12-21 22:28:51,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:51,536 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:51,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799813213] [2020-12-21 22:28:51,536 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 22:29:56,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:29:56,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:56,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:29:56,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-12-21 22:29:56,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332685219] [2020-12-21 22:29:56,441 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:56,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799813213] [2020-12-21 22:29:56,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:56,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:29:56,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760458912] [2020-12-21 22:29:56,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:29:56,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:56,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:29:56,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:29:56,444 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand 8 states. [2020-12-21 22:29:56,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:56,596 INFO L93 Difference]: Finished difference Result 148 states and 177 transitions. [2020-12-21 22:29:56,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:29:56,596 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-12-21 22:29:56,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:56,598 INFO L225 Difference]: With dead ends: 148 [2020-12-21 22:29:56,598 INFO L226 Difference]: Without dead ends: 89 [2020-12-21 22:29:56,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 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 22:29:56,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-21 22:29:56,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 76. [2020-12-21 22:29:56,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-21 22:29:56,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2020-12-21 22:29:56,613 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 54 [2020-12-21 22:29:56,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:56,614 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2020-12-21 22:29:56,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:29:56,614 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2020-12-21 22:29:56,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-21 22:29:56,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:56,615 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:56,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-21 22:29:56,829 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:56,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:56,831 INFO L82 PathProgramCache]: Analyzing trace with hash -684722495, now seen corresponding path program 5 times [2020-12-21 22:29:56,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:56,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38261486] [2020-12-21 22:29:56,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:56,847 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:56,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776800685] [2020-12-21 22:29:56,848 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