/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-commit-tester/m0_drivers-net-slip-ko--108_1a--1b0b0ac-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 12:25:40,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 12:25:40,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 12:25:40,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 12:25:40,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 12:25:40,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 12:25:40,194 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 12:25:40,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 12:25:40,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 12:25:40,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 12:25:40,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 12:25:40,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 12:25:40,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 12:25:40,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 12:25:40,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 12:25:40,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 12:25:40,219 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 12:25:40,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 12:25:40,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 12:25:40,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 12:25:40,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 12:25:40,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 12:25:40,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 12:25:40,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 12:25:40,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 12:25:40,271 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 12:25:40,271 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 12:25:40,272 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 12:25:40,273 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 12:25:40,274 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 12:25:40,274 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 12:25:40,275 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 12:25:40,276 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 12:25:40,277 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 12:25:40,278 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 12:25:40,279 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 12:25:40,279 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 12:25:40,280 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 12:25:40,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 12:25:40,281 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 12:25:40,282 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 12:25:40,283 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 12:25:40,320 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 12:25:40,320 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 12:25:40,321 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 12:25:40,322 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 12:25:40,323 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 12:25:40,323 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 12:25:40,324 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 12:25:40,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 12:25:40,324 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 12:25:40,324 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 12:25:40,325 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 12:25:40,326 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 12:25:40,326 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 12:25:40,326 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 12:25:40,326 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 12:25:40,326 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 12:25:40,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 12:25:40,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 12:25:40,327 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 12:25:40,327 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 12:25:40,328 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 12:25:40,328 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 12:25:40,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 12:25:40,328 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 12:25:40,328 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 12:25:40,329 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 12:25:40,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 12:25:40,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 12:25:40,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 12:25:40,747 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 12:25:40,748 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 12:25:40,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-commit-tester/m0_drivers-net-slip-ko--108_1a--1b0b0ac-1.i [2020-12-22 12:25:40,836 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdbb0a709/dde1ffb0879742499d79601ba1e98dcd/FLAGb39672a10 [2020-12-22 12:25:41,928 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 12:25:41,929 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-commit-tester/m0_drivers-net-slip-ko--108_1a--1b0b0ac-1.i [2020-12-22 12:25:41,989 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdbb0a709/dde1ffb0879742499d79601ba1e98dcd/FLAGb39672a10 [2020-12-22 12:25:42,304 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdbb0a709/dde1ffb0879742499d79601ba1e98dcd [2020-12-22 12:25:42,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 12:25:42,312 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 12:25:42,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 12:25:42,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 12:25:42,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 12:25:42,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:25:42" (1/1) ... [2020-12-22 12:25:42,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e6e475f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:25:42, skipping insertion in model container [2020-12-22 12:25:42,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:25:42" (1/1) ... [2020-12-22 12:25:42,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 12:25:42,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 12:25:43,862 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-commit-tester/m0_drivers-net-slip-ko--108_1a--1b0b0ac-1.i[202861,202874] [2020-12-22 12:25:43,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 12:25:43,901 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 12:25:44,214 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-commit-tester/m0_drivers-net-slip-ko--108_1a--1b0b0ac-1.i[202861,202874] [2020-12-22 12:25:44,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 12:25:44,514 INFO L208 MainTranslator]: Completed translation [2020-12-22 12:25:44,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:25:44 WrapperNode [2020-12-22 12:25:44,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 12:25:44,517 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 12:25:44,517 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 12:25:44,517 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 12:25:44,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:25:44" (1/1) ... [2020-12-22 12:25:44,617 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:25:44" (1/1) ... [2020-12-22 12:25:44,868 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 12:25:44,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 12:25:44,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 12:25:44,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 12:25:44,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:25:44" (1/1) ... [2020-12-22 12:25:44,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:25:44" (1/1) ... [2020-12-22 12:25:44,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:25:44" (1/1) ... [2020-12-22 12:25:44,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:25:44" (1/1) ... [2020-12-22 12:25:45,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:25:44" (1/1) ... [2020-12-22 12:25:45,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:25:44" (1/1) ... [2020-12-22 12:25:45,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:25:44" (1/1) ... [2020-12-22 12:25:45,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 12:25:45,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 12:25:45,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 12:25:45,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 12:25:45,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:25:44" (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 12:25:45,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 12:25:45,306 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2020-12-22 12:25:45,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-12-22 12:25:45,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-12-22 12:25:45,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 12:25:45,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 12:25:45,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 12:25:45,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 12:25:45,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 12:25:45,310 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2020-12-22 12:25:45,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 12:25:45,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 12:25:45,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 12:25:45,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 12:25:45,312 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-12-22 12:25:45,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 12:25:45,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 12:25:50,743 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 12:25:50,744 INFO L299 CfgBuilder]: Removed 972 assume(true) statements. [2020-12-22 12:25:50,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:25:50 BoogieIcfgContainer [2020-12-22 12:25:50,748 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 12:25:50,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 12:25:50,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 12:25:50,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 12:25:50,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:25:42" (1/3) ... [2020-12-22 12:25:50,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19b387e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:25:50, skipping insertion in model container [2020-12-22 12:25:50,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:25:44" (2/3) ... [2020-12-22 12:25:50,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19b387e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:25:50, skipping insertion in model container [2020-12-22 12:25:50,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:25:50" (3/3) ... [2020-12-22 12:25:50,758 INFO L111 eAbstractionObserver]: Analyzing ICFG m0_drivers-net-slip-ko--108_1a--1b0b0ac-1.i [2020-12-22 12:25:50,765 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 12:25:50,771 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 12:25:50,791 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 12:25:50,841 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 12:25:50,841 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 12:25:50,841 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 12:25:50,841 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 12:25:50,841 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 12:25:50,841 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 12:25:50,841 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 12:25:50,841 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 12:25:50,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states. [2020-12-22 12:25:50,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 12:25:50,886 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 12:25:50,887 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] [2020-12-22 12:25:50,888 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 12:25:50,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 12:25:50,894 INFO L82 PathProgramCache]: Analyzing trace with hash -864679343, now seen corresponding path program 1 times [2020-12-22 12:25:50,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 12:25:50,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322223678] [2020-12-22 12:25:50,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 12:25:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 12:25:51,312 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 12:25:51,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322223678] [2020-12-22 12:25:51,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 12:25:51,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 12:25:51,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351790737] [2020-12-22 12:25:51,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 12:25:51,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 12:25:51,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 12:25:51,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 12:25:51,337 INFO L87 Difference]: Start difference. First operand 1042 states. Second operand 3 states. [2020-12-22 12:25:51,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 12:25:51,499 INFO L93 Difference]: Finished difference Result 2079 states and 3101 transitions. [2020-12-22 12:25:51,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 12:25:51,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-12-22 12:25:51,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 12:25:51,532 INFO L225 Difference]: With dead ends: 2079 [2020-12-22 12:25:51,533 INFO L226 Difference]: Without dead ends: 1011 [2020-12-22 12:25:51,544 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 12:25:51,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2020-12-22 12:25:51,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 1011. [2020-12-22 12:25:51,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1011 states. [2020-12-22 12:25:51,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 1492 transitions. [2020-12-22 12:25:51,695 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 1492 transitions. Word has length 36 [2020-12-22 12:25:51,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 12:25:51,696 INFO L481 AbstractCegarLoop]: Abstraction has 1011 states and 1492 transitions. [2020-12-22 12:25:51,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 12:25:51,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 1492 transitions. [2020-12-22 12:25:51,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 12:25:51,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 12:25:51,705 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] [2020-12-22 12:25:51,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 12:25:51,707 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 12:25:51,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 12:25:51,709 INFO L82 PathProgramCache]: Analyzing trace with hash -842047089, now seen corresponding path program 1 times [2020-12-22 12:25:51,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 12:25:51,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696367808] [2020-12-22 12:25:51,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 12:25:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 12:25:51,954 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 12:25:51,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696367808] [2020-12-22 12:25:51,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 12:25:51,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 12:25:51,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711013329] [2020-12-22 12:25:51,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 12:25:51,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 12:25:51,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 12:25:51,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 12:25:51,959 INFO L87 Difference]: Start difference. First operand 1011 states and 1492 transitions. Second operand 4 states. [2020-12-22 12:25:52,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 12:25:52,105 INFO L93 Difference]: Finished difference Result 1999 states and 2957 transitions. [2020-12-22 12:25:52,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 12:25:52,106 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-12-22 12:25:52,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 12:25:52,112 INFO L225 Difference]: With dead ends: 1999 [2020-12-22 12:25:52,113 INFO L226 Difference]: Without dead ends: 1011 [2020-12-22 12:25:52,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 12:25:52,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2020-12-22 12:25:52,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 1011. [2020-12-22 12:25:52,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1011 states. [2020-12-22 12:25:52,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 1491 transitions. [2020-12-22 12:25:52,171 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 1491 transitions. Word has length 36 [2020-12-22 12:25:52,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 12:25:52,172 INFO L481 AbstractCegarLoop]: Abstraction has 1011 states and 1491 transitions. [2020-12-22 12:25:52,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 12:25:52,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 1491 transitions. [2020-12-22 12:25:52,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 12:25:52,174 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 12:25:52,174 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] [2020-12-22 12:25:52,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 12:25:52,175 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 12:25:52,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 12:25:52,175 INFO L82 PathProgramCache]: Analyzing trace with hash 44746728, now seen corresponding path program 1 times [2020-12-22 12:25:52,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 12:25:52,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545958246] [2020-12-22 12:25:52,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 12:25:52,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 12:25:52,349 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 12:25:52,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545958246] [2020-12-22 12:25:52,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 12:25:52,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 12:25:52,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725937871] [2020-12-22 12:25:52,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 12:25:52,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 12:25:52,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 12:25:52,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 12:25:52,360 INFO L87 Difference]: Start difference. First operand 1011 states and 1491 transitions. Second operand 4 states. [2020-12-22 12:25:52,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 12:25:52,507 INFO L93 Difference]: Finished difference Result 1999 states and 2956 transitions. [2020-12-22 12:25:52,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 12:25:52,508 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-12-22 12:25:52,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 12:25:52,521 INFO L225 Difference]: With dead ends: 1999 [2020-12-22 12:25:52,521 INFO L226 Difference]: Without dead ends: 1997 [2020-12-22 12:25:52,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 12:25:52,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2020-12-22 12:25:52,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1013. [2020-12-22 12:25:52,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1013 states. [2020-12-22 12:25:52,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1493 transitions. [2020-12-22 12:25:52,595 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1493 transitions. Word has length 39 [2020-12-22 12:25:52,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 12:25:52,596 INFO L481 AbstractCegarLoop]: Abstraction has 1013 states and 1493 transitions. [2020-12-22 12:25:52,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 12:25:52,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1493 transitions. [2020-12-22 12:25:52,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 12:25:52,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 12:25:52,600 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] [2020-12-22 12:25:52,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 12:25:52,600 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 12:25:52,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 12:25:52,601 INFO L82 PathProgramCache]: Analyzing trace with hash -660420083, now seen corresponding path program 1 times [2020-12-22 12:25:52,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 12:25:52,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046379447] [2020-12-22 12:25:52,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 12:25:52,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 12:25:52,794 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 12:25:52,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046379447] [2020-12-22 12:25:52,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 12:25:52,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 12:25:52,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920991314] [2020-12-22 12:25:52,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 12:25:52,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 12:25:52,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 12:25:52,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 12:25:52,799 INFO L87 Difference]: Start difference. First operand 1013 states and 1493 transitions. Second operand 4 states. [2020-12-22 12:25:53,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 12:25:53,150 INFO L93 Difference]: Finished difference Result 2989 states and 4423 transitions. [2020-12-22 12:25:53,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 12:25:53,150 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-12-22 12:25:53,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 12:25:53,163 INFO L225 Difference]: With dead ends: 2989 [2020-12-22 12:25:53,163 INFO L226 Difference]: Without dead ends: 2001 [2020-12-22 12:25:53,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 12:25:53,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2020-12-22 12:25:53,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 1014. [2020-12-22 12:25:53,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1014 states. [2020-12-22 12:25:53,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 1494 transitions. [2020-12-22 12:25:53,255 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 1494 transitions. Word has length 46 [2020-12-22 12:25:53,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 12:25:53,257 INFO L481 AbstractCegarLoop]: Abstraction has 1014 states and 1494 transitions. [2020-12-22 12:25:53,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 12:25:53,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 1494 transitions. [2020-12-22 12:25:53,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 12:25:53,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 12:25:53,260 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] [2020-12-22 12:25:53,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 12:25:53,260 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 12:25:53,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 12:25:53,261 INFO L82 PathProgramCache]: Analyzing trace with hash 32416044, now seen corresponding path program 1 times [2020-12-22 12:25:53,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 12:25:53,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909603303] [2020-12-22 12:25:53,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 12:25:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 12:25:53,436 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 12:25:53,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909603303] [2020-12-22 12:25:53,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 12:25:53,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 12:25:53,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118367046] [2020-12-22 12:25:53,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 12:25:53,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 12:25:53,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 12:25:53,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 12:25:53,439 INFO L87 Difference]: Start difference. First operand 1014 states and 1494 transitions. Second operand 5 states. [2020-12-22 12:25:53,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 12:25:53,878 INFO L93 Difference]: Finished difference Result 3636 states and 5391 transitions. [2020-12-22 12:25:53,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 12:25:53,879 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-12-22 12:25:53,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 12:25:53,956 INFO L225 Difference]: With dead ends: 3636 [2020-12-22 12:25:53,957 INFO L226 Difference]: Without dead ends: 3634 [2020-12-22 12:25:53,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 12:25:53,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3634 states. [2020-12-22 12:25:54,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3634 to 1015. [2020-12-22 12:25:54,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1015 states. [2020-12-22 12:25:54,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1495 transitions. [2020-12-22 12:25:54,057 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1495 transitions. Word has length 48 [2020-12-22 12:25:54,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 12:25:54,059 INFO L481 AbstractCegarLoop]: Abstraction has 1015 states and 1495 transitions. [2020-12-22 12:25:54,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 12:25:54,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1495 transitions. [2020-12-22 12:25:54,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 12:25:54,063 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 12:25:54,063 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] [2020-12-22 12:25:54,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 12:25:54,064 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 12:25:54,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 12:25:54,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1646884847, now seen corresponding path program 1 times [2020-12-22 12:25:54,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 12:25:54,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315747691] [2020-12-22 12:25:54,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 12:25:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 12:25:54,246 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 12:25:54,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315747691] [2020-12-22 12:25:54,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 12:25:54,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 12:25:54,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398033625] [2020-12-22 12:25:54,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 12:25:54,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 12:25:54,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 12:25:54,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 12:25:54,251 INFO L87 Difference]: Start difference. First operand 1015 states and 1495 transitions. Second operand 3 states. [2020-12-22 12:25:54,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 12:25:54,524 INFO L93 Difference]: Finished difference Result 2005 states and 2962 transitions. [2020-12-22 12:25:54,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 12:25:54,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 12:25:54,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 12:25:54,531 INFO L225 Difference]: With dead ends: 2005 [2020-12-22 12:25:54,532 INFO L226 Difference]: Without dead ends: 1015 [2020-12-22 12:25:54,534 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 12:25:54,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2020-12-22 12:25:54,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 1015. [2020-12-22 12:25:54,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1015 states. [2020-12-22 12:25:54,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1494 transitions. [2020-12-22 12:25:54,627 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1494 transitions. Word has length 62 [2020-12-22 12:25:54,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 12:25:54,627 INFO L481 AbstractCegarLoop]: Abstraction has 1015 states and 1494 transitions. [2020-12-22 12:25:54,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 12:25:54,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1494 transitions. [2020-12-22 12:25:54,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 12:25:54,630 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 12:25:54,631 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] [2020-12-22 12:25:54,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 12:25:54,631 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 12:25:54,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 12:25:54,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1521423125, now seen corresponding path program 1 times [2020-12-22 12:25:54,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 12:25:54,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395481460] [2020-12-22 12:25:54,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 12:25:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 12:25:54,748 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 12:25:54,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395481460] [2020-12-22 12:25:54,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 12:25:54,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 12:25:54,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215908243] [2020-12-22 12:25:54,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 12:25:54,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 12:25:54,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 12:25:54,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 12:25:54,751 INFO L87 Difference]: Start difference. First operand 1015 states and 1494 transitions. Second operand 4 states. [2020-12-22 12:25:55,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 12:25:55,102 INFO L93 Difference]: Finished difference Result 2994 states and 4425 transitions. [2020-12-22 12:25:55,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 12:25:55,102 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-12-22 12:25:55,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 12:25:55,113 INFO L225 Difference]: With dead ends: 2994 [2020-12-22 12:25:55,113 INFO L226 Difference]: Without dead ends: 2004 [2020-12-22 12:25:55,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 12:25:55,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2004 states. [2020-12-22 12:25:55,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2004 to 1019. [2020-12-22 12:25:55,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1019 states. [2020-12-22 12:25:55,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1499 transitions. [2020-12-22 12:25:55,224 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1499 transitions. Word has length 64 [2020-12-22 12:25:55,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 12:25:55,224 INFO L481 AbstractCegarLoop]: Abstraction has 1019 states and 1499 transitions. [2020-12-22 12:25:55,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 12:25:55,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1499 transitions. [2020-12-22 12:25:55,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 12:25:55,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 12:25:55,228 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] [2020-12-22 12:25:55,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 12:25:55,228 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 12:25:55,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 12:25:55,229 INFO L82 PathProgramCache]: Analyzing trace with hash -897723055, now seen corresponding path program 1 times [2020-12-22 12:25:55,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 12:25:55,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947027473] [2020-12-22 12:25:55,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 12:25:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 12:25:55,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 12:25:55,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947027473] [2020-12-22 12:25:55,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 12:25:55,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 12:25:55,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772352928] [2020-12-22 12:25:55,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 12:25:55,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 12:25:55,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 12:25:55,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 12:25:55,379 INFO L87 Difference]: Start difference. First operand 1019 states and 1499 transitions. Second operand 3 states. [2020-12-22 12:25:55,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 12:25:55,641 INFO L93 Difference]: Finished difference Result 2022 states and 2979 transitions. [2020-12-22 12:25:55,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 12:25:55,642 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 12:25:55,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 12:25:55,648 INFO L225 Difference]: With dead ends: 2022 [2020-12-22 12:25:55,648 INFO L226 Difference]: Without dead ends: 1028 [2020-12-22 12:25:55,650 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 12:25:55,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2020-12-22 12:25:55,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 1019. [2020-12-22 12:25:55,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1019 states. [2020-12-22 12:25:55,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1472 transitions. [2020-12-22 12:25:55,744 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1472 transitions. Word has length 67 [2020-12-22 12:25:55,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 12:25:55,745 INFO L481 AbstractCegarLoop]: Abstraction has 1019 states and 1472 transitions. [2020-12-22 12:25:55,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 12:25:55,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1472 transitions. [2020-12-22 12:25:55,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 12:25:55,748 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 12:25:55,748 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] [2020-12-22 12:25:55,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 12:25:55,749 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 12:25:55,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 12:25:55,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1614523249, now seen corresponding path program 1 times [2020-12-22 12:25:55,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 12:25:55,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468891808] [2020-12-22 12:25:55,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 12:25:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 12:25:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 12:25:55,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468891808] [2020-12-22 12:25:55,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927271924] [2020-12-22 12:25:55,900 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 12:25:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 12:25:56,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 12:25:56,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 12:25:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 12:25:56,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 12:25:56,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-22 12:25:56,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901623673] [2020-12-22 12:25:56,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 12:25:56,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 12:25:56,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 12:25:56,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 12:25:56,616 INFO L87 Difference]: Start difference. First operand 1019 states and 1472 transitions. Second operand 7 states. [2020-12-22 12:25:57,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 12:25:57,382 INFO L93 Difference]: Finished difference Result 3987 states and 5785 transitions. [2020-12-22 12:25:57,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 12:25:57,383 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 70 [2020-12-22 12:25:57,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 12:25:57,400 INFO L225 Difference]: With dead ends: 3987 [2020-12-22 12:25:57,400 INFO L226 Difference]: Without dead ends: 2993 [2020-12-22 12:25:57,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 12:25:57,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2020-12-22 12:25:57,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 1022. [2020-12-22 12:25:57,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1022 states. [2020-12-22 12:25:57,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 1476 transitions. [2020-12-22 12:25:57,595 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 1476 transitions. Word has length 70 [2020-12-22 12:25:57,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 12:25:57,595 INFO L481 AbstractCegarLoop]: Abstraction has 1022 states and 1476 transitions. [2020-12-22 12:25:57,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 12:25:57,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 1476 transitions. [2020-12-22 12:25:57,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 12:25:57,598 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 12:25:57,599 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:25:57,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 12:25:57,813 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 12:25:57,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 12:25:57,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1542420939, now seen corresponding path program 2 times [2020-12-22 12:25:57,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 12:25:57,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099507929] [2020-12-22 12:25:57,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 12:25:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 12:25:58,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 12:25:58,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099507929] [2020-12-22 12:25:58,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667733576] [2020-12-22 12:25:58,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 12:25:58,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 12:25:58,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 12:25:58,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 12:25:58,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 12:25:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 12:25:59,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 12:25:59,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2020-12-22 12:25:59,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627012923] [2020-12-22 12:25:59,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 12:25:59,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 12:25:59,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 12:25:59,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 12:25:59,040 INFO L87 Difference]: Start difference. First operand 1022 states and 1476 transitions. Second operand 4 states. [2020-12-22 12:25:59,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 12:25:59,527 INFO L93 Difference]: Finished difference Result 3657 states and 5318 transitions. [2020-12-22 12:25:59,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 12:25:59,528 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-12-22 12:25:59,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 12:25:59,543 INFO L225 Difference]: With dead ends: 3657 [2020-12-22 12:25:59,544 INFO L226 Difference]: Without dead ends: 2660 [2020-12-22 12:25:59,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 12:25:59,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2020-12-22 12:25:59,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 1024. [2020-12-22 12:25:59,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2020-12-22 12:25:59,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1478 transitions. [2020-12-22 12:25:59,711 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1478 transitions. Word has length 73 [2020-12-22 12:25:59,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 12:25:59,711 INFO L481 AbstractCegarLoop]: Abstraction has 1024 states and 1478 transitions. [2020-12-22 12:25:59,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 12:25:59,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1478 transitions. [2020-12-22 12:25:59,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 12:25:59,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 12:25:59,721 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] [2020-12-22 12:25:59,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 12:25:59,936 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 12:25:59,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 12:25:59,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1076976601, now seen corresponding path program 1 times [2020-12-22 12:25:59,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 12:25:59,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311878350] [2020-12-22 12:25:59,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 12:25:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 12:26:00,049 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 12:26:00,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311878350] [2020-12-22 12:26:00,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 12:26:00,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 12:26:00,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477184315] [2020-12-22 12:26:00,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 12:26:00,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 12:26:00,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 12:26:00,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 12:26:00,053 INFO L87 Difference]: Start difference. First operand 1024 states and 1478 transitions. Second operand 3 states. [2020-12-22 12:26:00,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 12:26:00,341 INFO L93 Difference]: Finished difference Result 2855 states and 4145 transitions. [2020-12-22 12:26:00,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 12:26:00,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 12:26:00,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 12:26:00,353 INFO L225 Difference]: With dead ends: 2855 [2020-12-22 12:26:00,354 INFO L226 Difference]: Without dead ends: 1856 [2020-12-22 12:26:00,357 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 12:26:00,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2020-12-22 12:26:00,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1027. [2020-12-22 12:26:00,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1027 states. [2020-12-22 12:26:00,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1482 transitions. [2020-12-22 12:26:00,479 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1482 transitions. Word has length 77 [2020-12-22 12:26:00,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 12:26:00,479 INFO L481 AbstractCegarLoop]: Abstraction has 1027 states and 1482 transitions. [2020-12-22 12:26:00,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 12:26:00,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1482 transitions. [2020-12-22 12:26:00,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 12:26:00,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 12:26:00,483 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 12:26:00,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 12:26:00,483 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 12:26:00,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 12:26:00,484 INFO L82 PathProgramCache]: Analyzing trace with hash 94341049, now seen corresponding path program 1 times [2020-12-22 12:26:00,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 12:26:00,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894753956] [2020-12-22 12:26:00,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 12:26:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 12:26:00,766 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 12:26:00,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894753956] [2020-12-22 12:26:00,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 12:26:00,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 12:26:00,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014729340] [2020-12-22 12:26:00,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 12:26:00,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 12:26:00,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 12:26:00,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 12:26:00,769 INFO L87 Difference]: Start difference. First operand 1027 states and 1482 transitions. Second operand 7 states. [2020-12-22 12:26:01,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 12:26:01,986 INFO L93 Difference]: Finished difference Result 4818 states and 6998 transitions. [2020-12-22 12:26:01,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 12:26:01,987 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 81 [2020-12-22 12:26:01,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 12:26:02,012 INFO L225 Difference]: With dead ends: 4818 [2020-12-22 12:26:02,012 INFO L226 Difference]: Without dead ends: 3806 [2020-12-22 12:26:02,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-12-22 12:26:02,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2020-12-22 12:26:02,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 1027. [2020-12-22 12:26:02,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1027 states. [2020-12-22 12:26:02,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1481 transitions. [2020-12-22 12:26:02,193 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1481 transitions. Word has length 81 [2020-12-22 12:26:02,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 12:26:02,193 INFO L481 AbstractCegarLoop]: Abstraction has 1027 states and 1481 transitions. [2020-12-22 12:26:02,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 12:26:02,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1481 transitions. [2020-12-22 12:26:02,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 12:26:02,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 12:26:02,197 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, 1, 1, 1] [2020-12-22 12:26:02,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 12:26:02,197 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 12:26:02,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 12:26:02,198 INFO L82 PathProgramCache]: Analyzing trace with hash -641251963, now seen corresponding path program 1 times [2020-12-22 12:26:02,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 12:26:02,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755896094] [2020-12-22 12:26:02,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 12:26:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 12:26:02,375 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 12:26:02,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755896094] [2020-12-22 12:26:02,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 12:26:02,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 12:26:02,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264868384] [2020-12-22 12:26:02,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 12:26:02,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 12:26:02,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 12:26:02,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 12:26:02,378 INFO L87 Difference]: Start difference. First operand 1027 states and 1481 transitions. Second operand 5 states. [2020-12-22 12:26:03,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 12:26:03,861 INFO L93 Difference]: Finished difference Result 6598 states and 9597 transitions. [2020-12-22 12:26:03,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 12:26:03,861 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 84 [2020-12-22 12:26:03,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 12:26:03,884 INFO L225 Difference]: With dead ends: 6598 [2020-12-22 12:26:03,884 INFO L226 Difference]: Without dead ends: 5596 [2020-12-22 12:26:03,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 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 12:26:03,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5596 states. [2020-12-22 12:26:04,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5596 to 1030. [2020-12-22 12:26:04,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1030 states. [2020-12-22 12:26:04,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 1484 transitions. [2020-12-22 12:26:04,106 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 1484 transitions. Word has length 84 [2020-12-22 12:26:04,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 12:26:04,106 INFO L481 AbstractCegarLoop]: Abstraction has 1030 states and 1484 transitions. [2020-12-22 12:26:04,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 12:26:04,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 1484 transitions. [2020-12-22 12:26:04,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 12:26:04,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 12:26:04,109 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:04,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 12:26:04,110 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 12:26:04,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 12:26:04,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1309179487, now seen corresponding path program 1 times [2020-12-22 12:26:04,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 12:26:04,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635457888] [2020-12-22 12:26:04,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 12:26:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 12:26:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 12:26:04,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635457888] [2020-12-22 12:26:04,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 12:26:04,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 12:26:04,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551215037] [2020-12-22 12:26:04,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 12:26:04,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 12:26:04,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 12:26:04,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 12:26:04,213 INFO L87 Difference]: Start difference. First operand 1030 states and 1484 transitions. Second operand 3 states. [2020-12-22 12:26:04,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 12:26:04,729 INFO L93 Difference]: Finished difference Result 2858 states and 4143 transitions. [2020-12-22 12:26:04,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 12:26:04,730 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-12-22 12:26:04,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 12:26:04,735 INFO L225 Difference]: With dead ends: 2858 [2020-12-22 12:26:04,736 INFO L226 Difference]: Without dead ends: 1853 [2020-12-22 12:26:04,738 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 12:26:04,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2020-12-22 12:26:04,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1024. [2020-12-22 12:26:04,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2020-12-22 12:26:04,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1474 transitions. [2020-12-22 12:26:04,906 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1474 transitions. Word has length 87 [2020-12-22 12:26:04,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 12:26:04,907 INFO L481 AbstractCegarLoop]: Abstraction has 1024 states and 1474 transitions. [2020-12-22 12:26:04,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 12:26:04,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1474 transitions. [2020-12-22 12:26:04,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 12:26:04,910 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 12:26:04,910 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, 1, 1, 1, 1, 1, 1] [2020-12-22 12:26:04,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 12:26:04,910 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 12:26:04,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 12:26:04,911 INFO L82 PathProgramCache]: Analyzing trace with hash -522722400, now seen corresponding path program 1 times [2020-12-22 12:26:04,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 12:26:04,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048893449] [2020-12-22 12:26:04,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 12:26:05,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 12:26:06,517 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 39 [2020-12-22 12:26:07,171 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 12:26:07,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048893449] [2020-12-22 12:26:07,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 12:26:07,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-12-22 12:26:07,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968430684] [2020-12-22 12:26:07,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 12:26:07,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 12:26:07,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 12:26:07,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2020-12-22 12:26:07,175 INFO L87 Difference]: Start difference. First operand 1024 states and 1474 transitions. Second operand 27 states. [2020-12-22 12:26:21,667 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 12:26:28,973 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-12-22 12:26:29,570 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-12-22 12:26:30,301 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-12-22 12:26:31,109 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2020-12-22 12:26:31,780 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-12-22 12:26:32,681 WARN L197 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 93 [2020-12-22 12:26:34,980 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 83 [2020-12-22 12:26:35,779 WARN L197 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 117 [2020-12-22 12:26:36,403 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-12-22 12:26:37,744 WARN L197 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 119 [2020-12-22 12:26:39,269 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 12:26:40,207 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 12:26:40,493 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-12-22 12:26:40,974 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-22 12:26:41,453 WARN L197 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 115 [2020-12-22 12:26:41,704 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-12-22 12:26:42,314 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-12-22 12:26:48,870 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2020-12-22 12:26:49,354 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-12-22 12:26:50,022 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-12-22 12:26:50,478 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2020-12-22 12:26:50,799 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 91 [2020-12-22 12:26:51,564 WARN L197 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 95 [2020-12-22 12:26:52,085 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-12-22 12:26:53,043 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 94 [2020-12-22 12:27:17,308 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 85 [2020-12-22 12:27:18,673 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-12-22 12:27:19,207 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 101 [2020-12-22 12:27:19,969 WARN L197 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 107 [2020-12-22 12:27:20,958 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-12-22 12:27:21,516 WARN L197 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 112 [2020-12-22 12:27:22,607 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 117 [2020-12-22 12:27:23,460 WARN L197 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 122 [2020-12-22 12:27:24,328 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2020-12-22 12:27:24,973 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-12-22 12:27:25,589 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-12-22 12:27:43,875 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2020-12-22 12:27:46,700 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 86 [2020-12-22 12:27:47,544 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 91 [2020-12-22 12:27:48,937 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2020-12-22 12:27:49,473 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-12-22 12:27:49,709 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 12:27:50,966 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-12-22 12:27:51,211 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-12-22 12:27:53,933 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-12-22 12:27:55,254 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 12:28:13,930 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 86 [2020-12-22 12:28:15,012 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 91 [2020-12-22 12:28:16,632 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-12-22 12:28:38,052 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-12-22 12:28:38,862 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-12-22 12:28:39,273 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-12-22 12:29:00,268 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-12-22 12:29:05,219 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-12-22 12:29:14,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 12:29:14,710 INFO L93 Difference]: Finished difference Result 23179 states and 34500 transitions. [2020-12-22 12:29:14,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2020-12-22 12:29:14,712 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 87 [2020-12-22 12:29:14,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 12:29:14,779 INFO L225 Difference]: With dead ends: 23179 [2020-12-22 12:29:14,780 INFO L226 Difference]: Without dead ends: 23177 [2020-12-22 12:29:14,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9452 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=3581, Invalid=23809, Unknown=0, NotChecked=0, Total=27390 [2020-12-22 12:29:14,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23177 states. [2020-12-22 12:29:15,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23177 to 1693. [2020-12-22 12:29:15,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1693 states. [2020-12-22 12:29:15,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 2440 transitions. [2020-12-22 12:29:15,429 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 2440 transitions. Word has length 87 [2020-12-22 12:29:15,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 12:29:15,430 INFO L481 AbstractCegarLoop]: Abstraction has 1693 states and 2440 transitions. [2020-12-22 12:29:15,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 12:29:15,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 2440 transitions. [2020-12-22 12:29:15,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 12:29:15,435 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 12:29:15,435 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, 1, 1, 1, 1, 1, 1] [2020-12-22 12:29:15,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 12:29:15,435 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 12:29:15,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 12:29:15,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1109733853, now seen corresponding path program 1 times [2020-12-22 12:29:15,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 12:29:15,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280254451] [2020-12-22 12:29:15,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 12:29:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 12:29:17,237 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 38 [2020-12-22 12:29:18,395 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 12:29:18,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280254451] [2020-12-22 12:29:18,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 12:29:18,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-12-22 12:29:18,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517877871] [2020-12-22 12:29:18,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 12:29:18,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 12:29:18,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 12:29:18,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-12-22 12:29:18,398 INFO L87 Difference]: Start difference. First operand 1693 states and 2440 transitions. Second operand 28 states. [2020-12-22 12:29:39,571 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 12:29:50,731 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-12-22 12:29:51,726 WARN L197 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-12-22 12:29:52,217 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-22 12:29:53,021 WARN L197 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-12-22 12:29:54,376 WARN L197 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70