/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/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--char--raw.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 13:53:39,198 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 13:53:39,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 13:53:39,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 13:53:39,235 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 13:53:39,237 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 13:53:39,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 13:53:39,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 13:53:39,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 13:53:39,244 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 13:53:39,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 13:53:39,247 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 13:53:39,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 13:53:39,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 13:53:39,250 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 13:53:39,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 13:53:39,253 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 13:53:39,254 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 13:53:39,256 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 13:53:39,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 13:53:39,261 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 13:53:39,265 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 13:53:39,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 13:53:39,267 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 13:53:39,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 13:53:39,274 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 13:53:39,277 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 13:53:39,279 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 13:53:39,283 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 13:53:39,284 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 13:53:39,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 13:53:39,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 13:53:39,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 13:53:39,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 13:53:39,289 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 13:53:39,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 13:53:39,291 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 13:53:39,291 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 13:53:39,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 13:53:39,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 13:53:39,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 13:53:39,299 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 13:53:39,354 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 13:53:39,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 13:53:39,359 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 13:53:39,359 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 13:53:39,359 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 13:53:39,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 13:53:39,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 13:53:39,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 13:53:39,360 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 13:53:39,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 13:53:39,362 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 13:53:39,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 13:53:39,363 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 13:53:39,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 13:53:39,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 13:53:39,364 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 13:53:39,364 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 13:53:39,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:53:39,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 13:53:39,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 13:53:39,365 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 13:53:39,366 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 13:53:39,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 13:53:39,382 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 13:53:39,382 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 13:53:39,382 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 13:53:39,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 13:53:39,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 13:53:39,851 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 13:53:39,853 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 13:53:39,853 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 13:53:39,854 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--char--raw.ko-entry_point.cil.out.i [2020-12-22 13:53:39,935 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ab96d07c/040eda1e35334e73b40565e7b85a871c/FLAG05b2753f9 [2020-12-22 13:53:40,777 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 13:53:40,778 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--char--raw.ko-entry_point.cil.out.i [2020-12-22 13:53:40,826 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ab96d07c/040eda1e35334e73b40565e7b85a871c/FLAG05b2753f9 [2020-12-22 13:53:41,334 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ab96d07c/040eda1e35334e73b40565e7b85a871c [2020-12-22 13:53:41,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 13:53:41,341 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 13:53:41,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 13:53:41,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 13:53:41,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 13:53:41,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:53:41" (1/1) ... [2020-12-22 13:53:41,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45666ee3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:53:41, skipping insertion in model container [2020-12-22 13:53:41,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:53:41" (1/1) ... [2020-12-22 13:53:41,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 13:53:41,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 13:53:42,332 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/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--char--raw.ko-entry_point.cil.out.i[135044,135057] [2020-12-22 13:53:42,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:53:42,433 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 13:53:42,809 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/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--char--raw.ko-entry_point.cil.out.i[135044,135057] [2020-12-22 13:53:42,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:53:42,983 INFO L208 MainTranslator]: Completed translation [2020-12-22 13:53:42,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:53:42 WrapperNode [2020-12-22 13:53:42,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 13:53:42,985 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 13:53:42,986 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 13:53:42,986 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 13:53:42,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:53:42" (1/1) ... [2020-12-22 13:53:43,069 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:53:42" (1/1) ... [2020-12-22 13:53:43,196 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 13:53:43,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 13:53:43,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 13:53:43,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 13:53:43,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:53:42" (1/1) ... [2020-12-22 13:53:43,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:53:42" (1/1) ... [2020-12-22 13:53:43,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:53:42" (1/1) ... [2020-12-22 13:53:43,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:53:42" (1/1) ... [2020-12-22 13:53:43,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:53:42" (1/1) ... [2020-12-22 13:53:43,328 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:53:42" (1/1) ... [2020-12-22 13:53:43,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:53:42" (1/1) ... [2020-12-22 13:53:43,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 13:53:43,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 13:53:43,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 13:53:43,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 13:53:43,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:53:42" (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 [2020-12-22 13:53:43,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 13:53:43,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 13:53:43,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 13:53:43,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 13:53:43,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 13:53:43,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 13:53:43,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 13:53:43,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 13:53:43,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 13:53:43,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 13:53:43,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 13:53:45,837 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 13:53:45,838 INFO L299 CfgBuilder]: Removed 424 assume(true) statements. [2020-12-22 13:53:45,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:53:45 BoogieIcfgContainer [2020-12-22 13:53:45,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 13:53:45,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 13:53:45,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 13:53:45,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 13:53:45,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:53:41" (1/3) ... [2020-12-22 13:53:45,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3402df2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:53:45, skipping insertion in model container [2020-12-22 13:53:45,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:53:42" (2/3) ... [2020-12-22 13:53:45,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3402df2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:53:45, skipping insertion in model container [2020-12-22 13:53:45,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:53:45" (3/3) ... [2020-12-22 13:53:45,849 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--char--raw.ko-entry_point.cil.out.i [2020-12-22 13:53:45,856 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 13:53:45,862 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-22 13:53:45,882 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 13:53:45,912 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 13:53:45,913 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 13:53:45,913 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 13:53:45,913 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 13:53:45,913 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 13:53:45,913 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 13:53:45,913 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 13:53:45,914 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 13:53:45,945 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states. [2020-12-22 13:53:45,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 13:53:45,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:53:45,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:53:45,958 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:53:45,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:53:45,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1479266012, now seen corresponding path program 1 times [2020-12-22 13:53:45,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:53:45,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935243443] [2020-12-22 13:53:45,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:53:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:53:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:53:46,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935243443] [2020-12-22 13:53:46,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:53:46,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:53:46,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660378960] [2020-12-22 13:53:46,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 13:53:46,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:53:46,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 13:53:46,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 13:53:46,559 INFO L87 Difference]: Start difference. First operand 380 states. Second operand 2 states. [2020-12-22 13:53:46,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:53:46,658 INFO L93 Difference]: Finished difference Result 756 states and 1049 transitions. [2020-12-22 13:53:46,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 13:53:46,661 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 68 [2020-12-22 13:53:46,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:53:46,689 INFO L225 Difference]: With dead ends: 756 [2020-12-22 13:53:46,689 INFO L226 Difference]: Without dead ends: 372 [2020-12-22 13:53:46,699 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 [2020-12-22 13:53:46,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-12-22 13:53:46,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2020-12-22 13:53:46,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-12-22 13:53:46,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 494 transitions. [2020-12-22 13:53:46,804 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 494 transitions. Word has length 68 [2020-12-22 13:53:46,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:53:46,806 INFO L481 AbstractCegarLoop]: Abstraction has 372 states and 494 transitions. [2020-12-22 13:53:46,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 13:53:46,806 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 494 transitions. [2020-12-22 13:53:46,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 13:53:46,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:53:46,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:53:46,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 13:53:46,818 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:53:46,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:53:46,820 INFO L82 PathProgramCache]: Analyzing trace with hash 500946732, now seen corresponding path program 1 times [2020-12-22 13:53:46,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:53:46,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844892058] [2020-12-22 13:53:46,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:53:46,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:53:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:53:47,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844892058] [2020-12-22 13:53:47,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:53:47,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:53:47,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644258575] [2020-12-22 13:53:47,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:53:47,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:53:47,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:53:47,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:53:47,156 INFO L87 Difference]: Start difference. First operand 372 states and 494 transitions. Second operand 3 states. [2020-12-22 13:53:47,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:53:47,277 INFO L93 Difference]: Finished difference Result 951 states and 1286 transitions. [2020-12-22 13:53:47,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:53:47,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 13:53:47,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:53:47,283 INFO L225 Difference]: With dead ends: 951 [2020-12-22 13:53:47,283 INFO L226 Difference]: Without dead ends: 634 [2020-12-22 13:53:47,285 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 [2020-12-22 13:53:47,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2020-12-22 13:53:47,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 630. [2020-12-22 13:53:47,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 630 states. [2020-12-22 13:53:47,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 854 transitions. [2020-12-22 13:53:47,315 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 854 transitions. Word has length 68 [2020-12-22 13:53:47,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:53:47,316 INFO L481 AbstractCegarLoop]: Abstraction has 630 states and 854 transitions. [2020-12-22 13:53:47,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:53:47,316 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 854 transitions. [2020-12-22 13:53:47,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 13:53:47,317 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:53:47,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:53:47,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 13:53:47,318 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:53:47,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:53:47,319 INFO L82 PathProgramCache]: Analyzing trace with hash -351650709, now seen corresponding path program 1 times [2020-12-22 13:53:47,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:53:47,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936883306] [2020-12-22 13:53:47,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:53:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:53:47,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:53:47,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936883306] [2020-12-22 13:53:47,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:53:47,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:53:47,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128771154] [2020-12-22 13:53:47,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:53:47,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:53:47,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:53:47,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:53:47,537 INFO L87 Difference]: Start difference. First operand 630 states and 854 transitions. Second operand 3 states. [2020-12-22 13:53:47,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:53:47,626 INFO L93 Difference]: Finished difference Result 1205 states and 1641 transitions. [2020-12-22 13:53:47,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:53:47,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-22 13:53:47,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:53:47,636 INFO L225 Difference]: With dead ends: 1205 [2020-12-22 13:53:47,637 INFO L226 Difference]: Without dead ends: 630 [2020-12-22 13:53:47,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:53:47,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2020-12-22 13:53:47,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 630. [2020-12-22 13:53:47,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 630 states. [2020-12-22 13:53:47,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 853 transitions. [2020-12-22 13:53:47,673 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 853 transitions. Word has length 75 [2020-12-22 13:53:47,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:53:47,674 INFO L481 AbstractCegarLoop]: Abstraction has 630 states and 853 transitions. [2020-12-22 13:53:47,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:53:47,674 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 853 transitions. [2020-12-22 13:53:47,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 13:53:47,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:53:47,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:53:47,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 13:53:47,676 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:53:47,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:53:47,676 INFO L82 PathProgramCache]: Analyzing trace with hash -938456723, now seen corresponding path program 1 times [2020-12-22 13:53:47,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:53:47,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481118748] [2020-12-22 13:53:47,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:53:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:53:47,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:53:47,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481118748] [2020-12-22 13:53:47,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:53:47,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:53:47,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122124368] [2020-12-22 13:53:47,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:53:47,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:53:47,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:53:47,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:53:47,847 INFO L87 Difference]: Start difference. First operand 630 states and 853 transitions. Second operand 3 states. [2020-12-22 13:53:47,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:53:47,967 INFO L93 Difference]: Finished difference Result 1774 states and 2420 transitions. [2020-12-22 13:53:47,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:53:47,968 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-22 13:53:47,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:53:47,978 INFO L225 Difference]: With dead ends: 1774 [2020-12-22 13:53:47,978 INFO L226 Difference]: Without dead ends: 1193 [2020-12-22 13:53:47,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:53:47,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2020-12-22 13:53:48,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1187. [2020-12-22 13:53:48,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1187 states. [2020-12-22 13:53:48,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 1617 transitions. [2020-12-22 13:53:48,033 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 1617 transitions. Word has length 75 [2020-12-22 13:53:48,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:53:48,034 INFO L481 AbstractCegarLoop]: Abstraction has 1187 states and 1617 transitions. [2020-12-22 13:53:48,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:53:48,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 1617 transitions. [2020-12-22 13:53:48,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 13:53:48,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:53:48,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:53:48,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 13:53:48,036 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:53:48,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:53:48,037 INFO L82 PathProgramCache]: Analyzing trace with hash -768560265, now seen corresponding path program 1 times [2020-12-22 13:53:48,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:53:48,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477229585] [2020-12-22 13:53:48,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:53:48,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:53:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:53:48,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477229585] [2020-12-22 13:53:48,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:53:48,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:53:48,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676467080] [2020-12-22 13:53:48,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:53:48,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:53:48,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:53:48,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:53:48,243 INFO L87 Difference]: Start difference. First operand 1187 states and 1617 transitions. Second operand 3 states. [2020-12-22 13:53:48,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:53:48,392 INFO L93 Difference]: Finished difference Result 2701 states and 3699 transitions. [2020-12-22 13:53:48,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:53:48,393 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 13:53:48,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:53:48,402 INFO L225 Difference]: With dead ends: 2701 [2020-12-22 13:53:48,403 INFO L226 Difference]: Without dead ends: 1569 [2020-12-22 13:53:48,405 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 [2020-12-22 13:53:48,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2020-12-22 13:53:48,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1561. [2020-12-22 13:53:48,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1561 states. [2020-12-22 13:53:48,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 2138 transitions. [2020-12-22 13:53:48,472 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 2138 transitions. Word has length 81 [2020-12-22 13:53:48,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:53:48,473 INFO L481 AbstractCegarLoop]: Abstraction has 1561 states and 2138 transitions. [2020-12-22 13:53:48,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:53:48,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 2138 transitions. [2020-12-22 13:53:48,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 13:53:48,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:53:48,482 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:53:48,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 13:53:48,483 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:53:48,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:53:48,483 INFO L82 PathProgramCache]: Analyzing trace with hash 498924061, now seen corresponding path program 1 times [2020-12-22 13:53:48,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:53:48,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282752025] [2020-12-22 13:53:48,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:53:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:53:48,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:53:48,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282752025] [2020-12-22 13:53:48,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:53:48,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:53:48,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338655074] [2020-12-22 13:53:48,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:53:48,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:53:48,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:53:48,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:53:48,682 INFO L87 Difference]: Start difference. First operand 1561 states and 2138 transitions. Second operand 3 states. [2020-12-22 13:53:48,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:53:48,835 INFO L93 Difference]: Finished difference Result 2477 states and 3385 transitions. [2020-12-22 13:53:48,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:53:48,836 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2020-12-22 13:53:48,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:53:48,844 INFO L225 Difference]: With dead ends: 2477 [2020-12-22 13:53:48,844 INFO L226 Difference]: Without dead ends: 969 [2020-12-22 13:53:48,847 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 [2020-12-22 13:53:48,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2020-12-22 13:53:48,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 965. [2020-12-22 13:53:48,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 965 states. [2020-12-22 13:53:48,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1305 transitions. [2020-12-22 13:53:48,910 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1305 transitions. Word has length 114 [2020-12-22 13:53:48,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:53:48,910 INFO L481 AbstractCegarLoop]: Abstraction has 965 states and 1305 transitions. [2020-12-22 13:53:48,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:53:48,918 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1305 transitions. [2020-12-22 13:53:48,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 13:53:48,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:53:48,920 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:53:48,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 13:53:48,924 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:53:48,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:53:48,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1008397151, now seen corresponding path program 1 times [2020-12-22 13:53:48,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:53:48,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498484114] [2020-12-22 13:53:48,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:53:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:53:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:53:49,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498484114] [2020-12-22 13:53:49,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:53:49,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:53:49,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278915399] [2020-12-22 13:53:49,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:53:49,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:53:49,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:53:49,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:53:49,218 INFO L87 Difference]: Start difference. First operand 965 states and 1305 transitions. Second operand 3 states. [2020-12-22 13:53:49,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:53:49,412 INFO L93 Difference]: Finished difference Result 2029 states and 2764 transitions. [2020-12-22 13:53:49,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:53:49,413 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2020-12-22 13:53:49,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:53:49,420 INFO L225 Difference]: With dead ends: 2029 [2020-12-22 13:53:49,420 INFO L226 Difference]: Without dead ends: 1202 [2020-12-22 13:53:49,425 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 [2020-12-22 13:53:49,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2020-12-22 13:53:49,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1193. [2020-12-22 13:53:49,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1193 states. [2020-12-22 13:53:49,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 1622 transitions. [2020-12-22 13:53:49,485 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 1622 transitions. Word has length 114 [2020-12-22 13:53:49,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:53:49,485 INFO L481 AbstractCegarLoop]: Abstraction has 1193 states and 1622 transitions. [2020-12-22 13:53:49,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:53:49,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 1622 transitions. [2020-12-22 13:53:49,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 13:53:49,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:53:49,488 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:53:49,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 13:53:49,490 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:53:49,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:53:49,491 INFO L82 PathProgramCache]: Analyzing trace with hash -34736104, now seen corresponding path program 1 times [2020-12-22 13:53:49,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:53:49,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622313946] [2020-12-22 13:53:49,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:53:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:53:49,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:53:49,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622313946] [2020-12-22 13:53:49,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074252771] [2020-12-22 13:53:49,680 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 [2020-12-22 13:53:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:53:50,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 1805 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 13:53:50,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:53:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 13:53:50,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:53:50,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 13:53:50,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791289742] [2020-12-22 13:53:50,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:53:50,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:53:50,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:53:50,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:53:50,999 INFO L87 Difference]: Start difference. First operand 1193 states and 1622 transitions. Second operand 3 states. [2020-12-22 13:53:51,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:53:51,152 INFO L93 Difference]: Finished difference Result 3185 states and 4338 transitions. [2020-12-22 13:53:51,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:53:51,153 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2020-12-22 13:53:51,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:53:51,164 INFO L225 Difference]: With dead ends: 3185 [2020-12-22 13:53:51,164 INFO L226 Difference]: Without dead ends: 2130 [2020-12-22 13:53:51,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:53:51,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2020-12-22 13:53:51,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 1197. [2020-12-22 13:53:51,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1197 states. [2020-12-22 13:53:51,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1626 transitions. [2020-12-22 13:53:51,248 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1626 transitions. Word has length 125 [2020-12-22 13:53:51,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:53:51,249 INFO L481 AbstractCegarLoop]: Abstraction has 1197 states and 1626 transitions. [2020-12-22 13:53:51,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:53:51,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1626 transitions. [2020-12-22 13:53:51,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 13:53:51,252 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:53:51,252 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:53:51,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-22 13:53:51,467 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:53:51,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:53:51,469 INFO L82 PathProgramCache]: Analyzing trace with hash 358290906, now seen corresponding path program 1 times [2020-12-22 13:53:51,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:53:51,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820299873] [2020-12-22 13:53:51,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:53:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:53:51,803 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:53:51,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820299873] [2020-12-22 13:53:51,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:53:51,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:53:51,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119407065] [2020-12-22 13:53:51,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:53:51,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:53:51,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:53:51,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:53:51,810 INFO L87 Difference]: Start difference. First operand 1197 states and 1626 transitions. Second operand 5 states. [2020-12-22 13:53:52,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:53:52,539 INFO L93 Difference]: Finished difference Result 5008 states and 6915 transitions. [2020-12-22 13:53:52,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 13:53:52,540 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 125 [2020-12-22 13:53:52,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:53:52,561 INFO L225 Difference]: With dead ends: 5008 [2020-12-22 13:53:52,562 INFO L226 Difference]: Without dead ends: 3949 [2020-12-22 13:53:52,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 13:53:52,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3949 states. [2020-12-22 13:53:52,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3949 to 1215. [2020-12-22 13:53:52,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1215 states. [2020-12-22 13:53:52,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 1644 transitions. [2020-12-22 13:53:52,734 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 1644 transitions. Word has length 125 [2020-12-22 13:53:52,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:53:52,734 INFO L481 AbstractCegarLoop]: Abstraction has 1215 states and 1644 transitions. [2020-12-22 13:53:52,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:53:52,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 1644 transitions. [2020-12-22 13:53:52,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 13:53:52,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:53:52,737 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:53:52,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 13:53:52,738 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:53:52,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:53:52,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1051886210, now seen corresponding path program 1 times [2020-12-22 13:53:52,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:53:52,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354272551] [2020-12-22 13:53:52,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:53:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:53:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 13:53:53,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354272551] [2020-12-22 13:53:53,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:53:53,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:53:53,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014944548] [2020-12-22 13:53:53,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:53:53,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:53:53,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:53:53,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:53:53,022 INFO L87 Difference]: Start difference. First operand 1215 states and 1644 transitions. Second operand 5 states. [2020-12-22 13:53:53,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:53:53,475 INFO L93 Difference]: Finished difference Result 4940 states and 6701 transitions. [2020-12-22 13:53:53,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:53:53,476 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2020-12-22 13:53:53,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:53:53,496 INFO L225 Difference]: With dead ends: 4940 [2020-12-22 13:53:53,497 INFO L226 Difference]: Without dead ends: 3863 [2020-12-22 13:53:53,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:53:53,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3863 states. [2020-12-22 13:53:53,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3863 to 1221. [2020-12-22 13:53:53,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1221 states. [2020-12-22 13:53:53,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1650 transitions. [2020-12-22 13:53:53,657 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1650 transitions. Word has length 131 [2020-12-22 13:53:53,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:53:53,658 INFO L481 AbstractCegarLoop]: Abstraction has 1221 states and 1650 transitions. [2020-12-22 13:53:53,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:53:53,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1650 transitions. [2020-12-22 13:53:53,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 13:53:53,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:53:53,661 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:53:53,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 13:53:53,661 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:53:53,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:53:53,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1095311460, now seen corresponding path program 1 times [2020-12-22 13:53:53,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:53:53,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387991237] [2020-12-22 13:53:53,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:53:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:53:54,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 13:53:54,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387991237] [2020-12-22 13:53:54,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:53:54,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:53:54,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749737477] [2020-12-22 13:53:54,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:53:54,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:53:54,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:53:54,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:53:54,008 INFO L87 Difference]: Start difference. First operand 1221 states and 1650 transitions. Second operand 3 states. [2020-12-22 13:53:54,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:53:54,203 INFO L93 Difference]: Finished difference Result 2434 states and 3303 transitions. [2020-12-22 13:53:54,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:53:54,204 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-12-22 13:53:54,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:53:54,211 INFO L225 Difference]: With dead ends: 2434 [2020-12-22 13:53:54,211 INFO L226 Difference]: Without dead ends: 1233 [2020-12-22 13:53:54,214 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 [2020-12-22 13:53:54,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2020-12-22 13:53:54,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1233. [2020-12-22 13:53:54,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1233 states. [2020-12-22 13:53:54,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 1662 transitions. [2020-12-22 13:53:54,337 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 1662 transitions. Word has length 132 [2020-12-22 13:53:54,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:53:54,337 INFO L481 AbstractCegarLoop]: Abstraction has 1233 states and 1662 transitions. [2020-12-22 13:53:54,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:53:54,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 1662 transitions. [2020-12-22 13:53:54,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 13:53:54,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:53:54,340 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:53:54,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 13:53:54,341 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:53:54,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:53:54,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1320963880, now seen corresponding path program 1 times [2020-12-22 13:53:54,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:53:54,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977331597] [2020-12-22 13:53:54,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:53:54,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:53:54,820 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-22 13:53:54,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977331597] [2020-12-22 13:53:54,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281944694] [2020-12-22 13:53:54,821 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 [2020-12-22 13:53:55,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:53:55,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 13:53:55,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:53:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 13:53:55,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:53:55,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2020-12-22 13:53:55,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352795340] [2020-12-22 13:53:55,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:53:55,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:53:55,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:53:55,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:53:55,677 INFO L87 Difference]: Start difference. First operand 1233 states and 1662 transitions. Second operand 5 states. [2020-12-22 13:53:55,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:53:55,947 INFO L93 Difference]: Finished difference Result 2333 states and 3145 transitions. [2020-12-22 13:53:55,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:53:55,948 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 144 [2020-12-22 13:53:55,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:53:55,954 INFO L225 Difference]: With dead ends: 2333 [2020-12-22 13:53:55,954 INFO L226 Difference]: Without dead ends: 1228 [2020-12-22 13:53:55,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 13:53:55,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2020-12-22 13:53:56,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1151. [2020-12-22 13:53:56,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1151 states. [2020-12-22 13:53:56,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1562 transitions. [2020-12-22 13:53:56,091 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1562 transitions. Word has length 144 [2020-12-22 13:53:56,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:53:56,091 INFO L481 AbstractCegarLoop]: Abstraction has 1151 states and 1562 transitions. [2020-12-22 13:53:56,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:53:56,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1562 transitions. [2020-12-22 13:53:56,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 13:53:56,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:53:56,095 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:53:56,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 13:53:56,310 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:53:56,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:53:56,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1330078944, now seen corresponding path program 1 times [2020-12-22 13:53:56,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:53:56,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123754078] [2020-12-22 13:53:56,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:53:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:53:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-22 13:53:56,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123754078] [2020-12-22 13:53:56,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466607219] [2020-12-22 13:53:56,691 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 [2020-12-22 13:53:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:53:58,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 2009 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 13:53:58,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:53:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-22 13:53:58,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:53:58,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-22 13:53:58,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490495745] [2020-12-22 13:53:58,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 13:53:58,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:53:58,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 13:53:58,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:53:58,418 INFO L87 Difference]: Start difference. First operand 1151 states and 1562 transitions. Second operand 6 states. [2020-12-22 13:53:58,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:53:58,712 INFO L93 Difference]: Finished difference Result 2300 states and 3140 transitions. [2020-12-22 13:53:58,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:53:58,713 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 147 [2020-12-22 13:53:58,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:53:58,719 INFO L225 Difference]: With dead ends: 2300 [2020-12-22 13:53:58,720 INFO L226 Difference]: Without dead ends: 1170 [2020-12-22 13:53:58,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:53:58,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2020-12-22 13:53:58,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1170. [2020-12-22 13:53:58,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1170 states. [2020-12-22 13:53:58,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 1581 transitions. [2020-12-22 13:53:58,827 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 1581 transitions. Word has length 147 [2020-12-22 13:53:58,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:53:58,827 INFO L481 AbstractCegarLoop]: Abstraction has 1170 states and 1581 transitions. [2020-12-22 13:53:58,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 13:53:58,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 1581 transitions. [2020-12-22 13:53:58,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 13:53:58,830 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:53:58,830 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:53:59,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 13:53:59,044 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:53:59,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:53:59,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1257574248, now seen corresponding path program 2 times [2020-12-22 13:53:59,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:53:59,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736563166] [2020-12-22 13:53:59,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:53:59,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:53:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-22 13:53:59,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736563166] [2020-12-22 13:53:59,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339750632] [2020-12-22 13:53:59,495 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 [2020-12-22 13:54:02,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:54:02,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:54:02,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 2123 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 13:54:02,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:54:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-22 13:54:02,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:54:02,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-22 13:54:02,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118773674] [2020-12-22 13:54:02,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 13:54:02,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:54:02,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 13:54:02,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:54:02,331 INFO L87 Difference]: Start difference. First operand 1170 states and 1581 transitions. Second operand 10 states. [2020-12-22 13:54:02,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:54:02,744 INFO L93 Difference]: Finished difference Result 2319 states and 3146 transitions. [2020-12-22 13:54:02,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:54:02,744 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 166 [2020-12-22 13:54:02,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:54:02,750 INFO L225 Difference]: With dead ends: 2319 [2020-12-22 13:54:02,750 INFO L226 Difference]: Without dead ends: 1177 [2020-12-22 13:54:02,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:54:02,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2020-12-22 13:54:02,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1177. [2020-12-22 13:54:02,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1177 states. [2020-12-22 13:54:02,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1588 transitions. [2020-12-22 13:54:02,893 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1588 transitions. Word has length 166 [2020-12-22 13:54:02,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:54:02,893 INFO L481 AbstractCegarLoop]: Abstraction has 1177 states and 1588 transitions. [2020-12-22 13:54:02,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 13:54:02,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1588 transitions. [2020-12-22 13:54:02,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-22 13:54:02,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:54:02,896 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:54:03,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:54:03,111 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:54:03,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:54:03,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1792087020, now seen corresponding path program 3 times [2020-12-22 13:54:03,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:54:03,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150286977] [2020-12-22 13:54:03,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:54:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:54:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-12-22 13:54:03,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150286977] [2020-12-22 13:54:03,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036192534] [2020-12-22 13:54:03,580 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 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 [2020-12-22 13:54:05,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 13:54:05,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:54:06,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 1704 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 13:54:06,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:54:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-12-22 13:54:06,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:54:06,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-22 13:54:06,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568421639] [2020-12-22 13:54:06,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 13:54:06,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:54:06,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 13:54:06,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:54:06,376 INFO L87 Difference]: Start difference. First operand 1177 states and 1588 transitions. Second operand 8 states. [2020-12-22 13:54:06,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:54:06,723 INFO L93 Difference]: Finished difference Result 2337 states and 3163 transitions. [2020-12-22 13:54:06,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 13:54:06,724 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 173 [2020-12-22 13:54:06,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:54:06,730 INFO L225 Difference]: With dead ends: 2337 [2020-12-22 13:54:06,730 INFO L226 Difference]: Without dead ends: 1182 [2020-12-22 13:54:06,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:54:06,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2020-12-22 13:54:06,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1182. [2020-12-22 13:54:06,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1182 states. [2020-12-22 13:54:06,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1593 transitions. [2020-12-22 13:54:06,846 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1593 transitions. Word has length 173 [2020-12-22 13:54:06,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:54:06,846 INFO L481 AbstractCegarLoop]: Abstraction has 1182 states and 1593 transitions. [2020-12-22 13:54:06,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 13:54:06,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1593 transitions. [2020-12-22 13:54:06,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-12-22 13:54:06,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:54:06,849 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:54:07,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 13:54:07,063 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:54:07,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:54:07,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1775575584, now seen corresponding path program 4 times [2020-12-22 13:54:07,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:54:07,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026259249] [2020-12-22 13:54:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:54:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:54:07,493 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-12-22 13:54:07,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026259249] [2020-12-22 13:54:07,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986326897] [2020-12-22 13:54:07,493 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 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 [2020-12-22 13:54:11,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 13:54:11,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:54:11,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 2195 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 13:54:11,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:54:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-12-22 13:54:11,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:54:11,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-22 13:54:11,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961847810] [2020-12-22 13:54:11,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 13:54:11,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:54:11,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 13:54:11,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-12-22 13:54:11,699 INFO L87 Difference]: Start difference. First operand 1182 states and 1593 transitions. Second operand 12 states. [2020-12-22 13:54:12,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:54:12,044 INFO L93 Difference]: Finished difference Result 2341 states and 3168 transitions. [2020-12-22 13:54:12,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 13:54:12,045 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 178 [2020-12-22 13:54:12,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:54:12,051 INFO L225 Difference]: With dead ends: 2341 [2020-12-22 13:54:12,051 INFO L226 Difference]: Without dead ends: 1189 [2020-12-22 13:54:12,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-12-22 13:54:12,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2020-12-22 13:54:12,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1189. [2020-12-22 13:54:12,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1189 states. [2020-12-22 13:54:12,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 1600 transitions. [2020-12-22 13:54:12,155 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 1600 transitions. Word has length 178 [2020-12-22 13:54:12,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:54:12,156 INFO L481 AbstractCegarLoop]: Abstraction has 1189 states and 1600 transitions. [2020-12-22 13:54:12,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 13:54:12,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 1600 transitions. [2020-12-22 13:54:12,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-12-22 13:54:12,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:54:12,160 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:54:12,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:54:12,361 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:54:12,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:54:12,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1238310240, now seen corresponding path program 5 times [2020-12-22 13:54:12,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:54:12,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365186649] [2020-12-22 13:54:12,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:54:12,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:54:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-12-22 13:54:12,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365186649] [2020-12-22 13:54:12,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323857313] [2020-12-22 13:54:12,825 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 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