/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-industry-pattern/array_of_struct_ptr_cond_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:48:22,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:48:22,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:48:22,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:48:22,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:48:22,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:48:22,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:48:22,200 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:48:22,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:48:22,204 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:48:22,205 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:48:22,207 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:48:22,207 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:48:22,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:48:22,210 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:48:22,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:48:22,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:48:22,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:48:22,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:48:22,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:48:22,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:48:22,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:48:22,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:48:22,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:48:22,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-21 21:48:22,247 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-21 21:48:22,248 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-21 21:48:22,254 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-21 21:48:22,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-21 21:48:22,258 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-21 21:48:22,259 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 21:48:22,260 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 21:48:22,264 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 21:48:22,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 21:48:22,269 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 21:48:22,270 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 21:48:22,271 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 21:48:22,271 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 21:48:22,272 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:48:22,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:48:22,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:48:22,277 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:48:22,338 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:48:22,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:48:22,344 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:48:22,344 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:48:22,345 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:48:22,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:48:22,345 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:48:22,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:48:22,346 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:48:22,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:48:22,347 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:48:22,348 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:48:22,348 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:48:22,348 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:48:22,348 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:48:22,349 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:48:22,349 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:48:22,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:48:22,349 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:48:22,350 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:48:22,350 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:48:22,350 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:48:22,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:48:22,351 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:48:22,351 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:48:22,351 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:48:22,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:48:22,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:48:22,843 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:48:22,844 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:48:22,845 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:48:22,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_cond_init.i [2020-12-21 21:48:22,944 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/966b944fb/4973c6d2e24649e6b7391f0c85627a26/FLAGa14d2f5e7 [2020-12-21 21:48:23,623 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:48:23,623 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_cond_init.i [2020-12-21 21:48:23,635 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/966b944fb/4973c6d2e24649e6b7391f0c85627a26/FLAGa14d2f5e7 [2020-12-21 21:48:23,984 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/966b944fb/4973c6d2e24649e6b7391f0c85627a26 [2020-12-21 21:48:23,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:48:23,990 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:48:23,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:48:23,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:48:23,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:48:23,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:48:23" (1/1) ... [2020-12-21 21:48:23,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ffb8c5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:23, skipping insertion in model container [2020-12-21 21:48:23,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:48:23" (1/1) ... [2020-12-21 21:48:24,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:48:24,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:48:24,186 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-industry-pattern/array_of_struct_ptr_cond_init.i[999,1012] [2020-12-21 21:48:24,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:48:24,226 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:48:24,243 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-industry-pattern/array_of_struct_ptr_cond_init.i[999,1012] [2020-12-21 21:48:24,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:48:24,282 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:48:24,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:24 WrapperNode [2020-12-21 21:48:24,284 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:48:24,287 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:48:24,288 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:48:24,288 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:48:24,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:24" (1/1) ... [2020-12-21 21:48:24,322 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:24" (1/1) ... [2020-12-21 21:48:24,360 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:48:24,363 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:48:24,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:48:24,368 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:48:24,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:24" (1/1) ... [2020-12-21 21:48:24,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:24" (1/1) ... [2020-12-21 21:48:24,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:24" (1/1) ... [2020-12-21 21:48:24,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:24" (1/1) ... [2020-12-21 21:48:24,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:24" (1/1) ... [2020-12-21 21:48:24,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:24" (1/1) ... [2020-12-21 21:48:24,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:24" (1/1) ... [2020-12-21 21:48:24,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:48:24,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:48:24,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:48:24,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:48:24,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:24" (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 21:48:24,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-21 21:48:24,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:48:24,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-21 21:48:24,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:48:24,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:48:24,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-21 21:48:24,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:48:24,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:48:24,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:48:24,954 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:48:24,955 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-21 21:48:24,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:48:24 BoogieIcfgContainer [2020-12-21 21:48:24,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:48:24,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:48:24,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:48:24,981 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:48:24,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:48:23" (1/3) ... [2020-12-21 21:48:24,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bcf0303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:48:24, skipping insertion in model container [2020-12-21 21:48:24,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:24" (2/3) ... [2020-12-21 21:48:24,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bcf0303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:48:24, skipping insertion in model container [2020-12-21 21:48:24,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:48:24" (3/3) ... [2020-12-21 21:48:24,985 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_cond_init.i [2020-12-21 21:48:24,994 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:48:25,000 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:48:25,024 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:48:25,053 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:48:25,053 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:48:25,053 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:48:25,054 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:48:25,054 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:48:25,054 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:48:25,054 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:48:25,054 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:48:25,070 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-21 21:48:25,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-21 21:48:25,075 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:25,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:25,077 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:25,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:25,083 INFO L82 PathProgramCache]: Analyzing trace with hash 650130346, now seen corresponding path program 1 times [2020-12-21 21:48:25,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:25,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407446371] [2020-12-21 21:48:25,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:25,278 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 21:48:25,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407446371] [2020-12-21 21:48:25,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:48:25,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 21:48:25,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997987821] [2020-12-21 21:48:25,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 21:48:25,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:25,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 21:48:25,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:48:25,313 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-12-21 21:48:25,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:25,338 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2020-12-21 21:48:25,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 21:48:25,340 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-21 21:48:25,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:25,366 INFO L225 Difference]: With dead ends: 31 [2020-12-21 21:48:25,366 INFO L226 Difference]: Without dead ends: 15 [2020-12-21 21:48:25,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:48:25,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-21 21:48:25,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-21 21:48:25,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-21 21:48:25,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-12-21 21:48:25,412 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2020-12-21 21:48:25,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:25,413 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-12-21 21:48:25,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 21:48:25,414 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-12-21 21:48:25,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-21 21:48:25,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:25,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:25,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:48:25,418 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:25,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:25,420 INFO L82 PathProgramCache]: Analyzing trace with hash 220693081, now seen corresponding path program 1 times [2020-12-21 21:48:25,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:25,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783215126] [2020-12-21 21:48:25,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:25,561 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 21:48:25,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783215126] [2020-12-21 21:48:25,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:48:25,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:48:25,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593743321] [2020-12-21 21:48:25,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:48:25,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:25,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:48:25,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:48:25,568 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 3 states. [2020-12-21 21:48:25,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:25,648 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-12-21 21:48:25,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:48:25,650 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-21 21:48:25,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:25,651 INFO L225 Difference]: With dead ends: 35 [2020-12-21 21:48:25,652 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 21:48:25,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 21:48:25,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 21:48:25,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2020-12-21 21:48:25,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-21 21:48:25,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-12-21 21:48:25,669 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2020-12-21 21:48:25,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:25,670 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-12-21 21:48:25,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:48:25,671 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-12-21 21:48:25,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-21 21:48:25,672 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:25,673 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:25,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 21:48:25,675 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:25,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:25,678 INFO L82 PathProgramCache]: Analyzing trace with hash 702319140, now seen corresponding path program 1 times [2020-12-21 21:48:25,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:25,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884408405] [2020-12-21 21:48:25,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:25,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:25,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:25,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884408405] [2020-12-21 21:48:25,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020572962] [2020-12-21 21:48:25,828 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 21:48:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:25,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:48:25,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:26,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:26,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:48:26,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622760564] [2020-12-21 21:48:26,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:48:26,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:26,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:48:26,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:48:26,050 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 5 states. [2020-12-21 21:48:26,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:26,162 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2020-12-21 21:48:26,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:48:26,163 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-21 21:48:26,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:26,165 INFO L225 Difference]: With dead ends: 47 [2020-12-21 21:48:26,165 INFO L226 Difference]: Without dead ends: 39 [2020-12-21 21:48:26,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 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 21:48:26,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-21 21:48:26,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 21. [2020-12-21 21:48:26,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-21 21:48:26,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-12-21 21:48:26,172 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-12-21 21:48:26,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:26,172 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-12-21 21:48:26,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:48:26,173 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-12-21 21:48:26,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-21 21:48:26,174 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:26,174 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:26,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 21:48:26,390 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:26,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:26,392 INFO L82 PathProgramCache]: Analyzing trace with hash 43755833, now seen corresponding path program 2 times [2020-12-21 21:48:26,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:26,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197950568] [2020-12-21 21:48:26,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:26,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197950568] [2020-12-21 21:48:26,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318003023] [2020-12-21 21:48:26,488 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 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 21:48:26,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:48:26,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:26,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:48:26,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:26,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:26,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 21:48:26,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964893315] [2020-12-21 21:48:26,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:48:26,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:26,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:48:26,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:48:26,686 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 6 states. [2020-12-21 21:48:26,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:26,764 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2020-12-21 21:48:26,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:48:26,765 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-12-21 21:48:26,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:26,766 INFO L225 Difference]: With dead ends: 59 [2020-12-21 21:48:26,767 INFO L226 Difference]: Without dead ends: 51 [2020-12-21 21:48:26,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:48:26,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-21 21:48:26,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 26. [2020-12-21 21:48:26,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 21:48:26,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-12-21 21:48:26,778 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 18 [2020-12-21 21:48:26,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:26,779 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-12-21 21:48:26,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:48:26,779 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-12-21 21:48:26,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 21:48:26,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:26,780 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:26,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:26,982 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:26,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:26,983 INFO L82 PathProgramCache]: Analyzing trace with hash -749883580, now seen corresponding path program 3 times [2020-12-21 21:48:26,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:26,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137975412] [2020-12-21 21:48:26,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:27,102 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:27,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137975412] [2020-12-21 21:48:27,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034655614] [2020-12-21 21:48:27,103 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 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 21:48:27,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 21:48:27,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:27,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:48:27,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:27,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:27,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:48:27,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241912200] [2020-12-21 21:48:27,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:48:27,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:27,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:48:27,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:48:27,514 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 7 states. [2020-12-21 21:48:27,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:27,653 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2020-12-21 21:48:27,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:48:27,654 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-12-21 21:48:27,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:27,655 INFO L225 Difference]: With dead ends: 71 [2020-12-21 21:48:27,656 INFO L226 Difference]: Without dead ends: 63 [2020-12-21 21:48:27,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:48:27,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-21 21:48:27,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 31. [2020-12-21 21:48:27,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-21 21:48:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-12-21 21:48:27,676 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 23 [2020-12-21 21:48:27,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:27,676 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-12-21 21:48:27,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:48:27,676 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-12-21 21:48:27,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-21 21:48:27,678 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:27,678 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:27,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:27,893 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:27,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:27,895 INFO L82 PathProgramCache]: Analyzing trace with hash -239814631, now seen corresponding path program 4 times [2020-12-21 21:48:27,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:27,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028504756] [2020-12-21 21:48:27,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:27,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:28,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028504756] [2020-12-21 21:48:28,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972893320] [2020-12-21 21:48:28,074 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 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 21:48:28,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:48:28,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:28,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:48:28,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:28,393 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:28,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:28,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:48:28,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289137696] [2020-12-21 21:48:28,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:48:28,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:28,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:48:28,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:48:28,396 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 8 states. [2020-12-21 21:48:28,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:28,503 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2020-12-21 21:48:28,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:48:28,504 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-12-21 21:48:28,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:28,505 INFO L225 Difference]: With dead ends: 83 [2020-12-21 21:48:28,505 INFO L226 Difference]: Without dead ends: 75 [2020-12-21 21:48:28,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:48:28,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-21 21:48:28,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 36. [2020-12-21 21:48:28,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 21:48:28,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-12-21 21:48:28,511 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 28 [2020-12-21 21:48:28,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:28,512 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-12-21 21:48:28,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:48:28,512 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-12-21 21:48:28,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-21 21:48:28,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:28,513 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:28,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:28,727 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:28,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:28,728 INFO L82 PathProgramCache]: Analyzing trace with hash -840242076, now seen corresponding path program 5 times [2020-12-21 21:48:28,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:28,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047910246] [2020-12-21 21:48:28,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:28,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047910246] [2020-12-21 21:48:28,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990302341] [2020-12-21 21:48:28,853 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 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 21:48:32,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 21:48:32,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:32,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:48:32,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:32,741 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:32,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:32,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 21:48:32,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548839740] [2020-12-21 21:48:32,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:48:32,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:32,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:48:32,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:48:32,744 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 9 states. [2020-12-21 21:48:32,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:32,889 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2020-12-21 21:48:32,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:48:32,890 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-12-21 21:48:32,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:32,893 INFO L225 Difference]: With dead ends: 95 [2020-12-21 21:48:32,893 INFO L226 Difference]: Without dead ends: 87 [2020-12-21 21:48:32,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:48:32,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-21 21:48:32,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 41. [2020-12-21 21:48:32,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-21 21:48:32,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-12-21 21:48:32,913 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2020-12-21 21:48:32,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:32,913 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-12-21 21:48:32,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:48:32,913 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-12-21 21:48:32,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-21 21:48:32,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:32,915 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:33,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-21 21:48:33,116 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:33,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:33,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1601220345, now seen corresponding path program 6 times [2020-12-21 21:48:33,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:33,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110726865] [2020-12-21 21:48:33,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:33,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:33,293 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:33,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110726865] [2020-12-21 21:48:33,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852887886] [2020-12-21 21:48:33,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 21:48:35,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:48:35,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:35,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:48:35,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:35,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:35,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:48:35,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915306559] [2020-12-21 21:48:35,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:48:35,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:35,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:48:35,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:48:35,940 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 10 states. [2020-12-21 21:48:36,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:36,079 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2020-12-21 21:48:36,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:48:36,080 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-12-21 21:48:36,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:36,081 INFO L225 Difference]: With dead ends: 107 [2020-12-21 21:48:36,082 INFO L226 Difference]: Without dead ends: 99 [2020-12-21 21:48:36,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:48:36,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-21 21:48:36,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 46. [2020-12-21 21:48:36,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-21 21:48:36,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2020-12-21 21:48:36,089 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 38 [2020-12-21 21:48:36,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:36,089 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2020-12-21 21:48:36,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:48:36,090 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-12-21 21:48:36,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-21 21:48:36,091 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:36,091 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:36,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:36,293 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:36,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:36,294 INFO L82 PathProgramCache]: Analyzing trace with hash 58081668, now seen corresponding path program 7 times [2020-12-21 21:48:36,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:36,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697040753] [2020-12-21 21:48:36,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:36,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:36,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697040753] [2020-12-21 21:48:36,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260862289] [2020-12-21 21:48:36,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:36,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:48:36,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:36,751 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:36,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:36,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:48:36,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082666319] [2020-12-21 21:48:36,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:48:36,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:36,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:48:36,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:48:36,754 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 11 states. [2020-12-21 21:48:36,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:36,901 INFO L93 Difference]: Finished difference Result 119 states and 140 transitions. [2020-12-21 21:48:36,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:48:36,901 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-12-21 21:48:36,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:36,902 INFO L225 Difference]: With dead ends: 119 [2020-12-21 21:48:36,903 INFO L226 Difference]: Without dead ends: 111 [2020-12-21 21:48:36,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:48:36,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-21 21:48:36,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 51. [2020-12-21 21:48:36,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-21 21:48:36,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-12-21 21:48:36,911 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 43 [2020-12-21 21:48:36,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:36,912 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-12-21 21:48:36,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:48:36,912 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-12-21 21:48:36,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-21 21:48:36,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:36,913 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:37,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:37,127 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:37,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:37,128 INFO L82 PathProgramCache]: Analyzing trace with hash 726502873, now seen corresponding path program 8 times [2020-12-21 21:48:37,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:37,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016631864] [2020-12-21 21:48:37,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:37,307 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:37,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016631864] [2020-12-21 21:48:37,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303286839] [2020-12-21 21:48:37,308 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 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 21:48:37,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:48:37,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:37,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:48:37,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:37,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:37,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:48:37,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794133335] [2020-12-21 21:48:37,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:48:37,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:37,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:48:37,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:48:37,607 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 12 states. [2020-12-21 21:48:37,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:37,771 INFO L93 Difference]: Finished difference Result 131 states and 154 transitions. [2020-12-21 21:48:37,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:48:37,776 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-12-21 21:48:37,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:37,782 INFO L225 Difference]: With dead ends: 131 [2020-12-21 21:48:37,782 INFO L226 Difference]: Without dead ends: 123 [2020-12-21 21:48:37,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:48:37,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-21 21:48:37,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 56. [2020-12-21 21:48:37,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-21 21:48:37,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2020-12-21 21:48:37,799 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 48 [2020-12-21 21:48:37,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:37,800 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2020-12-21 21:48:37,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:48:37,800 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2020-12-21 21:48:37,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-21 21:48:37,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:37,804 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:38,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 21:48:38,020 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:38,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:38,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1825460572, now seen corresponding path program 9 times [2020-12-21 21:48:38,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:38,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754578101] [2020-12-21 21:48:38,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:38,275 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:38,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754578101] [2020-12-21 21:48:38,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959828370] [2020-12-21 21:48:38,276 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 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