/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--accel--kxcjk-1013.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 13:54:11,236 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 13:54:11,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 13:54:11,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 13:54:11,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 13:54:11,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 13:54:11,279 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 13:54:11,282 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 13:54:11,285 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 13:54:11,286 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 13:54:11,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 13:54:11,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 13:54:11,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 13:54:11,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 13:54:11,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 13:54:11,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 13:54:11,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 13:54:11,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 13:54:11,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 13:54:11,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 13:54:11,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 13:54:11,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 13:54:11,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 13:54:11,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 13:54:11,346 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 13:54:11,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 13:54:11,349 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 13:54:11,354 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 13:54:11,355 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 13:54:11,356 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 13:54:11,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 13:54:11,357 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 13:54:11,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 13:54:11,361 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 13:54:11,362 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 13:54:11,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 13:54:11,363 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 13:54:11,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 13:54:11,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 13:54:11,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 13:54:11,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 13:54:11,372 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 13:54:11,434 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 13:54:11,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 13:54:11,439 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 13:54:11,439 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 13:54:11,439 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 13:54:11,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 13:54:11,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 13:54:11,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 13:54:11,441 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 13:54:11,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 13:54:11,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 13:54:11,441 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 13:54:11,442 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 13:54:11,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 13:54:11,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 13:54:11,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 13:54:11,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 13:54:11,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:54:11,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 13:54:11,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 13:54:11,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 13:54:11,444 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 13:54:11,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 13:54:11,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 13:54:11,444 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 13:54:11,445 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 13:54:11,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 13:54:11,879 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 13:54:11,883 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 13:54:11,884 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 13:54:11,885 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 13:54:11,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--accel--kxcjk-1013.ko-entry_point.cil.out.i [2020-12-22 13:54:11,986 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c11e9aeeb/f252283981ba47c08670882fff3b5ddb/FLAGd5a68ce02 [2020-12-22 13:54:13,175 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 13:54:13,176 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--accel--kxcjk-1013.ko-entry_point.cil.out.i [2020-12-22 13:54:13,223 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c11e9aeeb/f252283981ba47c08670882fff3b5ddb/FLAGd5a68ce02 [2020-12-22 13:54:13,590 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c11e9aeeb/f252283981ba47c08670882fff3b5ddb [2020-12-22 13:54:13,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 13:54:13,597 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 13:54:13,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 13:54:13,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 13:54:13,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 13:54:13,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:54:13" (1/1) ... [2020-12-22 13:54:13,609 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9364562 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:54:13, skipping insertion in model container [2020-12-22 13:54:13,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:54:13" (1/1) ... [2020-12-22 13:54:13,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 13:54:13,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 13:54:15,726 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--accel--kxcjk-1013.ko-entry_point.cil.out.i[206964,206977] [2020-12-22 13:54:15,786 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2020-12-22 13:54:15,802 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:54:15,869 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 13:54:16,252 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--accel--kxcjk-1013.ko-entry_point.cil.out.i[206964,206977] [2020-12-22 13:54:16,268 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2020-12-22 13:54:16,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:54:16,592 INFO L208 MainTranslator]: Completed translation [2020-12-22 13:54:16,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:54:16 WrapperNode [2020-12-22 13:54:16,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 13:54:16,595 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 13:54:16,595 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 13:54:16,598 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 13:54:16,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:54:16" (1/1) ... [2020-12-22 13:54:16,722 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:54:16" (1/1) ... [2020-12-22 13:54:17,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 13:54:17,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 13:54:17,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 13:54:17,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 13:54:17,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:54:16" (1/1) ... [2020-12-22 13:54:17,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:54:16" (1/1) ... [2020-12-22 13:54:17,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:54:16" (1/1) ... [2020-12-22 13:54:17,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:54:16" (1/1) ... [2020-12-22 13:54:17,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:54:16" (1/1) ... [2020-12-22 13:54:17,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:54:16" (1/1) ... [2020-12-22 13:54:17,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:54:16" (1/1) ... [2020-12-22 13:54:17,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 13:54:17,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 13:54:17,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 13:54:17,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 13:54:17,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:54:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:54:17,740 INFO L130 BoogieDeclarations]: Found specification of procedure __cmpxchg_wrong_size [2020-12-22 13:54:17,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 13:54:17,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 13:54:17,740 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2020-12-22 13:54:17,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 13:54:17,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 13:54:17,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 13:54:17,851 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 13:54:17,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 13:54:17,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 13:54:17,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 13:54:17,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 13:54:17,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 13:54:17,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 13:54:48,864 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 13:54:48,865 INFO L299 CfgBuilder]: Removed 1852 assume(true) statements. [2020-12-22 13:54:48,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:54:48 BoogieIcfgContainer [2020-12-22 13:54:48,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 13:54:48,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 13:54:48,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 13:54:48,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 13:54:48,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:54:13" (1/3) ... [2020-12-22 13:54:48,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21d679a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:54:48, skipping insertion in model container [2020-12-22 13:54:48,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:54:16" (2/3) ... [2020-12-22 13:54:48,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21d679a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:54:48, skipping insertion in model container [2020-12-22 13:54:48,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:54:48" (3/3) ... [2020-12-22 13:54:48,880 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--iio--accel--kxcjk-1013.ko-entry_point.cil.out.i [2020-12-22 13:54:48,888 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 13:54:48,896 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 13:54:48,916 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 13:54:48,952 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 13:54:48,952 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 13:54:48,953 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 13:54:48,953 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 13:54:48,953 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 13:54:48,953 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 13:54:48,953 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 13:54:48,953 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 13:54:49,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states. [2020-12-22 13:54:49,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 13:54:49,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:54:49,023 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:54:49,024 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:54:49,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:54:49,030 INFO L82 PathProgramCache]: Analyzing trace with hash -192666553, now seen corresponding path program 1 times [2020-12-22 13:54:49,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:54:49,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011303745] [2020-12-22 13:54:49,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:54:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:54:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:54:49,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011303745] [2020-12-22 13:54:49,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:54:49,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:54:49,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61869222] [2020-12-22 13:54:49,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 13:54:49,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:54:49,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 13:54:49,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 13:54:49,914 INFO L87 Difference]: Start difference. First operand 2066 states. Second operand 2 states. [2020-12-22 13:54:50,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:54:50,068 INFO L93 Difference]: Finished difference Result 4128 states and 5909 transitions. [2020-12-22 13:54:50,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 13:54:50,069 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 118 [2020-12-22 13:54:50,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:54:50,099 INFO L225 Difference]: With dead ends: 4128 [2020-12-22 13:54:50,099 INFO L226 Difference]: Without dead ends: 2043 [2020-12-22 13:54:50,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 13:54:50,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2020-12-22 13:54:50,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 2043. [2020-12-22 13:54:50,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2043 states. [2020-12-22 13:54:50,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2043 states to 2043 states and 2889 transitions. [2020-12-22 13:54:50,261 INFO L78 Accepts]: Start accepts. Automaton has 2043 states and 2889 transitions. Word has length 118 [2020-12-22 13:54:50,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:54:50,262 INFO L481 AbstractCegarLoop]: Abstraction has 2043 states and 2889 transitions. [2020-12-22 13:54:50,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 13:54:50,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2043 states and 2889 transitions. [2020-12-22 13:54:50,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 13:54:50,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:54:50,269 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:54:50,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 13:54:50,270 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:54:50,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:54:50,272 INFO L82 PathProgramCache]: Analyzing trace with hash 687142361, now seen corresponding path program 1 times [2020-12-22 13:54:50,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:54:50,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241617184] [2020-12-22 13:54:50,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:54:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:54:50,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:54:50,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241617184] [2020-12-22 13:54:50,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:54:50,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:54:50,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393453178] [2020-12-22 13:54:50,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:54:50,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:54:50,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:54:50,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:54:50,822 INFO L87 Difference]: Start difference. First operand 2043 states and 2889 transitions. Second operand 3 states. [2020-12-22 13:54:53,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:54:53,198 INFO L93 Difference]: Finished difference Result 5897 states and 8399 transitions. [2020-12-22 13:54:53,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:54:53,200 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2020-12-22 13:54:53,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:54:53,224 INFO L225 Difference]: With dead ends: 5897 [2020-12-22 13:54:53,225 INFO L226 Difference]: Without dead ends: 3955 [2020-12-22 13:54:53,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:54:53,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3955 states. [2020-12-22 13:54:53,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3955 to 3955. [2020-12-22 13:54:53,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3955 states. [2020-12-22 13:54:53,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3955 states to 3955 states and 5626 transitions. [2020-12-22 13:54:53,359 INFO L78 Accepts]: Start accepts. Automaton has 3955 states and 5626 transitions. Word has length 118 [2020-12-22 13:54:53,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:54:53,361 INFO L481 AbstractCegarLoop]: Abstraction has 3955 states and 5626 transitions. [2020-12-22 13:54:53,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:54:53,361 INFO L276 IsEmpty]: Start isEmpty. Operand 3955 states and 5626 transitions. [2020-12-22 13:54:53,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 13:54:53,372 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:54:53,373 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:54:53,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 13:54:53,374 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:54:53,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:54:53,375 INFO L82 PathProgramCache]: Analyzing trace with hash 104069193, now seen corresponding path program 1 times [2020-12-22 13:54:53,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:54:53,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631758992] [2020-12-22 13:54:53,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:54:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:54:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:54:53,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631758992] [2020-12-22 13:54:53,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:54:53,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:54:53,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988785583] [2020-12-22 13:54:54,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:54:54,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:54:54,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:54:54,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:54:54,011 INFO L87 Difference]: Start difference. First operand 3955 states and 5626 transitions. Second operand 3 states. [2020-12-22 13:54:54,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:54:54,228 INFO L93 Difference]: Finished difference Result 7809 states and 11133 transitions. [2020-12-22 13:54:54,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:54:54,239 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2020-12-22 13:54:54,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:54:54,281 INFO L225 Difference]: With dead ends: 7809 [2020-12-22 13:54:54,281 INFO L226 Difference]: Without dead ends: 7805 [2020-12-22 13:54:54,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:54:54,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7805 states. [2020-12-22 13:54:54,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7805 to 7805. [2020-12-22 13:54:54,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7805 states. [2020-12-22 13:54:54,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7805 states to 7805 states and 11127 transitions. [2020-12-22 13:54:54,690 INFO L78 Accepts]: Start accepts. Automaton has 7805 states and 11127 transitions. Word has length 122 [2020-12-22 13:54:54,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:54:54,691 INFO L481 AbstractCegarLoop]: Abstraction has 7805 states and 11127 transitions. [2020-12-22 13:54:54,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:54:54,691 INFO L276 IsEmpty]: Start isEmpty. Operand 7805 states and 11127 transitions. [2020-12-22 13:54:54,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-12-22 13:54:54,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:54:54,706 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:54:54,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 13:54:54,706 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:54:54,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:54:54,707 INFO L82 PathProgramCache]: Analyzing trace with hash -2130557170, now seen corresponding path program 1 times [2020-12-22 13:54:54,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:54:54,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551677529] [2020-12-22 13:54:54,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:54:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:54:55,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:54:55,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551677529] [2020-12-22 13:54:55,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:54:55,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:54:55,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428409572] [2020-12-22 13:54:55,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:54:55,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:54:55,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:54:55,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:54:55,202 INFO L87 Difference]: Start difference. First operand 7805 states and 11127 transitions. Second operand 3 states. [2020-12-22 13:54:55,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:54:55,896 INFO L93 Difference]: Finished difference Result 22269 states and 31890 transitions. [2020-12-22 13:54:55,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:54:55,896 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 180 [2020-12-22 13:54:55,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:54:55,994 INFO L225 Difference]: With dead ends: 22269 [2020-12-22 13:54:55,995 INFO L226 Difference]: Without dead ends: 14565 [2020-12-22 13:54:56,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:54:56,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14565 states. [2020-12-22 13:54:56,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14565 to 14561. [2020-12-22 13:54:56,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14561 states. [2020-12-22 13:54:56,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14561 states to 14561 states and 20875 transitions. [2020-12-22 13:54:56,574 INFO L78 Accepts]: Start accepts. Automaton has 14561 states and 20875 transitions. Word has length 180 [2020-12-22 13:54:56,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:54:56,576 INFO L481 AbstractCegarLoop]: Abstraction has 14561 states and 20875 transitions. [2020-12-22 13:54:56,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:54:56,576 INFO L276 IsEmpty]: Start isEmpty. Operand 14561 states and 20875 transitions. [2020-12-22 13:54:56,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-12-22 13:54:56,602 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:54:56,603 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:54:56,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 13:54:56,603 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:54:56,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:54:56,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1298696450, now seen corresponding path program 1 times [2020-12-22 13:54:56,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:54:56,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607773457] [2020-12-22 13:54:56,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:54:56,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:54:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 13:54:57,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607773457] [2020-12-22 13:54:57,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829105671] [2020-12-22 13:54:57,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:54:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:54:58,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 4202 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:54:58,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:54:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 13:54:59,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:54:59,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2020-12-22 13:54:59,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70667916] [2020-12-22 13:54:59,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:54:59,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:54:59,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:54:59,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:54:59,173 INFO L87 Difference]: Start difference. First operand 14561 states and 20875 transitions. Second operand 4 states. [2020-12-22 13:55:01,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:55:01,328 INFO L93 Difference]: Finished difference Result 70545 states and 101387 transitions. [2020-12-22 13:55:01,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:55:01,329 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 218 [2020-12-22 13:55:01,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:55:01,497 INFO L225 Difference]: With dead ends: 70545 [2020-12-22 13:55:01,498 INFO L226 Difference]: Without dead ends: 56085 [2020-12-22 13:55:01,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:55:01,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56085 states. [2020-12-22 13:55:02,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56085 to 14569. [2020-12-22 13:55:02,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14569 states. [2020-12-22 13:55:02,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14569 states to 14569 states and 20883 transitions. [2020-12-22 13:55:02,583 INFO L78 Accepts]: Start accepts. Automaton has 14569 states and 20883 transitions. Word has length 218 [2020-12-22 13:55:02,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:55:02,584 INFO L481 AbstractCegarLoop]: Abstraction has 14569 states and 20883 transitions. [2020-12-22 13:55:02,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:55:02,584 INFO L276 IsEmpty]: Start isEmpty. Operand 14569 states and 20883 transitions. [2020-12-22 13:55:02,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-12-22 13:55:02,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:55:02,607 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:55:02,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:55:02,823 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:55:02,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:55:02,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1413250717, now seen corresponding path program 1 times [2020-12-22 13:55:02,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:55:02,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688731924] [2020-12-22 13:55:02,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:55:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:55:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 13:55:04,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688731924] [2020-12-22 13:55:04,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969511105] [2020-12-22 13:55:04,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:55:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:55:05,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 4484 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:55:05,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:55:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 13:55:06,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:55:06,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2020-12-22 13:55:06,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656208882] [2020-12-22 13:55:06,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:55:06,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:55:06,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:55:06,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:55:06,182 INFO L87 Difference]: Start difference. First operand 14569 states and 20883 transitions. Second operand 4 states. [2020-12-22 13:55:09,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:55:09,199 INFO L93 Difference]: Finished difference Result 68709 states and 98555 transitions. [2020-12-22 13:55:09,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:55:09,200 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 245 [2020-12-22 13:55:09,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:55:09,359 INFO L225 Difference]: With dead ends: 68709 [2020-12-22 13:55:09,360 INFO L226 Difference]: Without dead ends: 54241 [2020-12-22 13:55:09,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:55:09,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54241 states. [2020-12-22 13:55:10,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54241 to 14585. [2020-12-22 13:55:10,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14585 states. [2020-12-22 13:55:10,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14585 states to 14585 states and 20899 transitions. [2020-12-22 13:55:10,726 INFO L78 Accepts]: Start accepts. Automaton has 14585 states and 20899 transitions. Word has length 245 [2020-12-22 13:55:10,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:55:10,727 INFO L481 AbstractCegarLoop]: Abstraction has 14585 states and 20899 transitions. [2020-12-22 13:55:10,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:55:10,727 INFO L276 IsEmpty]: Start isEmpty. Operand 14585 states and 20899 transitions. [2020-12-22 13:55:10,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-12-22 13:55:10,750 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:55:10,750 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:55:10,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:55:10,965 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:55:10,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:55:10,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1161637369, now seen corresponding path program 1 times [2020-12-22 13:55:10,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:55:10,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913981367] [2020-12-22 13:55:10,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:55:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:55:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 13:55:11,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913981367] [2020-12-22 13:55:11,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891834458] [2020-12-22 13:55:11,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:55:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:55:13,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 4542 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:55:13,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:55:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 13:55:13,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:55:13,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2020-12-22 13:55:13,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710692671] [2020-12-22 13:55:13,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:55:13,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:55:13,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:55:13,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:55:13,448 INFO L87 Difference]: Start difference. First operand 14585 states and 20899 transitions. Second operand 4 states. [2020-12-22 13:55:15,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:55:15,603 INFO L93 Difference]: Finished difference Result 70817 states and 101699 transitions. [2020-12-22 13:55:15,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:55:15,604 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 253 [2020-12-22 13:55:15,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:55:15,742 INFO L225 Difference]: With dead ends: 70817 [2020-12-22 13:55:15,742 INFO L226 Difference]: Without dead ends: 56333 [2020-12-22 13:55:15,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:55:15,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56333 states. [2020-12-22 13:55:17,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56333 to 14593. [2020-12-22 13:55:17,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14593 states. [2020-12-22 13:55:17,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14593 states to 14593 states and 20907 transitions. [2020-12-22 13:55:17,116 INFO L78 Accepts]: Start accepts. Automaton has 14593 states and 20907 transitions. Word has length 253 [2020-12-22 13:55:17,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:55:17,117 INFO L481 AbstractCegarLoop]: Abstraction has 14593 states and 20907 transitions. [2020-12-22 13:55:17,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:55:17,117 INFO L276 IsEmpty]: Start isEmpty. Operand 14593 states and 20907 transitions. [2020-12-22 13:55:17,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-12-22 13:55:17,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:55:17,143 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:55:17,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:55:17,357 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:55:17,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:55:17,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1223929376, now seen corresponding path program 1 times [2020-12-22 13:55:17,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:55:17,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284402804] [2020-12-22 13:55:17,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:55:17,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:55:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 13:55:18,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284402804] [2020-12-22 13:55:18,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100290926] [2020-12-22 13:55:18,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:55:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:55:19,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 4572 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 13:55:19,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:55:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 13:55:20,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:55:20,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2020-12-22 13:55:20,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207174802] [2020-12-22 13:55:20,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:55:20,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:55:20,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:55:20,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:55:20,211 INFO L87 Difference]: Start difference. First operand 14593 states and 20907 transitions. Second operand 4 states. [2020-12-22 13:55:23,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:55:23,964 INFO L93 Difference]: Finished difference Result 43579 states and 62484 transitions. [2020-12-22 13:55:23,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:55:23,965 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 255 [2020-12-22 13:55:23,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:55:24,020 INFO L225 Difference]: With dead ends: 43579 [2020-12-22 13:55:24,021 INFO L226 Difference]: Without dead ends: 43575 [2020-12-22 13:55:24,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 255 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 13:55:24,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43575 states. [2020-12-22 13:55:26,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43575 to 43141. [2020-12-22 13:55:26,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43141 states. [2020-12-22 13:55:26,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43141 states to 43141 states and 61923 transitions. [2020-12-22 13:55:26,133 INFO L78 Accepts]: Start accepts. Automaton has 43141 states and 61923 transitions. Word has length 255 [2020-12-22 13:55:26,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:55:26,133 INFO L481 AbstractCegarLoop]: Abstraction has 43141 states and 61923 transitions. [2020-12-22 13:55:26,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:55:26,134 INFO L276 IsEmpty]: Start isEmpty. Operand 43141 states and 61923 transitions. [2020-12-22 13:55:26,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-12-22 13:55:26,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:55:26,181 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:55:26,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:55:26,396 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:55:26,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:55:26,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1076893214, now seen corresponding path program 1 times [2020-12-22 13:55:26,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:55:26,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564081929] [2020-12-22 13:55:26,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:55:27,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:55:27,457 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 24 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:55:27,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564081929] [2020-12-22 13:55:27,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597409428] [2020-12-22 13:55:27,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:55:29,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:55:29,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 4567 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 13:55:29,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:55:29,451 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 13:55:29,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:55:29,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 10 [2020-12-22 13:55:29,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546266507] [2020-12-22 13:55:29,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 13:55:29,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:55:29,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 13:55:29,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:55:29,456 INFO L87 Difference]: Start difference. First operand 43141 states and 61923 transitions. Second operand 7 states. [2020-12-22 13:55:40,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:55:40,476 INFO L93 Difference]: Finished difference Result 295057 states and 424287 transitions. [2020-12-22 13:55:40,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 13:55:40,476 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 255 [2020-12-22 13:55:40,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:55:41,105 INFO L225 Difference]: With dead ends: 295057 [2020-12-22 13:55:41,105 INFO L226 Difference]: Without dead ends: 252017 [2020-12-22 13:55:41,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-12-22 13:55:41,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252017 states. [2020-12-22 13:55:45,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252017 to 43201. [2020-12-22 13:55:45,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43201 states. [2020-12-22 13:55:45,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43201 states to 43201 states and 61995 transitions. [2020-12-22 13:55:45,740 INFO L78 Accepts]: Start accepts. Automaton has 43201 states and 61995 transitions. Word has length 255 [2020-12-22 13:55:45,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:55:45,740 INFO L481 AbstractCegarLoop]: Abstraction has 43201 states and 61995 transitions. [2020-12-22 13:55:45,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 13:55:45,740 INFO L276 IsEmpty]: Start isEmpty. Operand 43201 states and 61995 transitions. [2020-12-22 13:55:45,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-12-22 13:55:45,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:55:45,768 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:55:45,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:55:45,984 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:55:45,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:55:45,985 INFO L82 PathProgramCache]: Analyzing trace with hash -294914084, now seen corresponding path program 1 times [2020-12-22 13:55:45,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:55:45,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804002322] [2020-12-22 13:55:45,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:55:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:55:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 13:55:46,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804002322] [2020-12-22 13:55:46,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:55:46,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:55:46,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56721578] [2020-12-22 13:55:46,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:55:46,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:55:46,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:55:46,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:55:46,846 INFO L87 Difference]: Start difference. First operand 43201 states and 61995 transitions. Second operand 5 states. [2020-12-22 13:55:55,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:55:55,637 INFO L93 Difference]: Finished difference Result 169729 states and 243987 transitions. [2020-12-22 13:55:55,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:55:55,638 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-12-22 13:55:55,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:55:55,820 INFO L225 Difference]: With dead ends: 169729 [2020-12-22 13:55:55,820 INFO L226 Difference]: Without dead ends: 126629 [2020-12-22 13:55:55,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:55:55,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126629 states. [2020-12-22 13:55:59,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126629 to 43237. [2020-12-22 13:55:59,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43237 states. [2020-12-22 13:55:59,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43237 states to 43237 states and 62031 transitions. [2020-12-22 13:55:59,843 INFO L78 Accepts]: Start accepts. Automaton has 43237 states and 62031 transitions. Word has length 255 [2020-12-22 13:55:59,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:55:59,844 INFO L481 AbstractCegarLoop]: Abstraction has 43237 states and 62031 transitions. [2020-12-22 13:55:59,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:55:59,844 INFO L276 IsEmpty]: Start isEmpty. Operand 43237 states and 62031 transitions. [2020-12-22 13:55:59,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 13:55:59,871 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:55:59,872 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:55:59,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 13:55:59,872 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:55:59,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:55:59,873 INFO L82 PathProgramCache]: Analyzing trace with hash -675431404, now seen corresponding path program 1 times [2020-12-22 13:55:59,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:55:59,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859410043] [2020-12-22 13:55:59,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:56:00,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:56:00,534 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 13:56:00,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859410043] [2020-12-22 13:56:00,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:56:00,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:56:00,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47934214] [2020-12-22 13:56:00,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:56:00,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:56:00,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:56:00,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:56:00,546 INFO L87 Difference]: Start difference. First operand 43237 states and 62031 transitions. Second operand 3 states. [2020-12-22 13:56:07,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:56:07,026 INFO L93 Difference]: Finished difference Result 120905 states and 173243 transitions. [2020-12-22 13:56:07,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:56:07,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 261 [2020-12-22 13:56:07,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:56:07,125 INFO L225 Difference]: With dead ends: 120905 [2020-12-22 13:56:07,126 INFO L226 Difference]: Without dead ends: 77769 [2020-12-22 13:56:07,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:56:07,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77769 states. [2020-12-22 13:56:11,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77769 to 43237. [2020-12-22 13:56:11,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43237 states. [2020-12-22 13:56:11,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43237 states to 43237 states and 61755 transitions. [2020-12-22 13:56:11,125 INFO L78 Accepts]: Start accepts. Automaton has 43237 states and 61755 transitions. Word has length 261 [2020-12-22 13:56:11,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:56:11,125 INFO L481 AbstractCegarLoop]: Abstraction has 43237 states and 61755 transitions. [2020-12-22 13:56:11,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:56:11,125 INFO L276 IsEmpty]: Start isEmpty. Operand 43237 states and 61755 transitions. [2020-12-22 13:56:11,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 13:56:11,169 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:56:11,169 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:56:11,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 13:56:11,170 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:56:11,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:56:11,170 INFO L82 PathProgramCache]: Analyzing trace with hash -231530730, now seen corresponding path program 1 times [2020-12-22 13:56:11,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:56:11,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389251832] [2020-12-22 13:56:11,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:56:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:56:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-22 13:56:14,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389251832] [2020-12-22 13:56:14,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:56:14,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:56:14,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305895411] [2020-12-22 13:56:14,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:56:14,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:56:14,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:56:14,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:56:14,024 INFO L87 Difference]: Start difference. First operand 43237 states and 61755 transitions. Second operand 3 states. [2020-12-22 13:56:17,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:56:17,715 INFO L93 Difference]: Finished difference Result 86440 states and 123491 transitions. [2020-12-22 13:56:17,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:56:17,716 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 261 [2020-12-22 13:56:17,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:56:17,764 INFO L225 Difference]: With dead ends: 86440 [2020-12-22 13:56:17,765 INFO L226 Difference]: Without dead ends: 43254 [2020-12-22 13:56:17,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:56:17,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43254 states. [2020-12-22 13:56:21,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43254 to 43254. [2020-12-22 13:56:21,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43254 states. [2020-12-22 13:56:21,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43254 states to 43254 states and 61772 transitions. [2020-12-22 13:56:21,341 INFO L78 Accepts]: Start accepts. Automaton has 43254 states and 61772 transitions. Word has length 261 [2020-12-22 13:56:21,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:56:21,342 INFO L481 AbstractCegarLoop]: Abstraction has 43254 states and 61772 transitions. [2020-12-22 13:56:21,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:56:21,342 INFO L276 IsEmpty]: Start isEmpty. Operand 43254 states and 61772 transitions. [2020-12-22 13:56:21,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-12-22 13:56:21,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:56:21,366 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:56:21,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 13:56:21,366 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:56:21,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:56:21,367 INFO L82 PathProgramCache]: Analyzing trace with hash 94003851, now seen corresponding path program 1 times [2020-12-22 13:56:21,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:56:21,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437450629] [2020-12-22 13:56:21,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:56:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:56:25,810 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-22 13:56:25,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437450629] [2020-12-22 13:56:25,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569353913] [2020-12-22 13:56:25,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:56:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:56:45,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 4716 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 13:56:45,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:56:46,110 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-22 13:56:46,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:56:46,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 13:56:46,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509880581] [2020-12-22 13:56:46,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:56:46,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:56:46,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:56:46,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:56:46,113 INFO L87 Difference]: Start difference. First operand 43254 states and 61772 transitions. Second operand 3 states. [2020-12-22 13:56:50,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:56:50,408 INFO L93 Difference]: Finished difference Result 86461 states and 123497 transitions. [2020-12-22 13:56:50,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:56:50,409 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 278 [2020-12-22 13:56:50,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:56:50,459 INFO L225 Difference]: With dead ends: 86461 [2020-12-22 13:56:50,459 INFO L226 Difference]: Without dead ends: 43255 [2020-12-22 13:56:50,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:56:50,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43255 states. [2020-12-22 13:56:53,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43255 to 43255. [2020-12-22 13:56:53,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43255 states. [2020-12-22 13:56:54,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43255 states to 43255 states and 61773 transitions. [2020-12-22 13:56:54,012 INFO L78 Accepts]: Start accepts. Automaton has 43255 states and 61773 transitions. Word has length 278 [2020-12-22 13:56:54,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:56:54,012 INFO L481 AbstractCegarLoop]: Abstraction has 43255 states and 61773 transitions. [2020-12-22 13:56:54,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:56:54,012 INFO L276 IsEmpty]: Start isEmpty. Operand 43255 states and 61773 transitions. [2020-12-22 13:56:54,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-12-22 13:56:54,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:56:54,037 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:56:54,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:56:54,238 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:56:54,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:56:54,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1661667620, now seen corresponding path program 1 times [2020-12-22 13:56:54,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:56:54,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220206451] [2020-12-22 13:56:54,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:56:58,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:56:58,953 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-22 13:56:58,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220206451] [2020-12-22 13:56:58,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213052995] [2020-12-22 13:56:58,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:57:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:57:45,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 4722 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-22 13:57:45,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:57:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-22 13:57:45,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:57:45,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 8 [2020-12-22 13:57:45,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340116391] [2020-12-22 13:57:45,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 13:57:45,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:57:45,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 13:57:45,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:57:45,767 INFO L87 Difference]: Start difference. First operand 43255 states and 61773 transitions. Second operand 8 states.