/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-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 13:17:45,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 13:17:45,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 13:17:45,280 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 13:17:45,281 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 13:17:45,282 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 13:17:45,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 13:17:45,287 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 13:17:45,289 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 13:17:45,290 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 13:17:45,291 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 13:17:45,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 13:17:45,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 13:17:45,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 13:17:45,296 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 13:17:45,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 13:17:45,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 13:17:45,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 13:17:45,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 13:17:45,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 13:17:45,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 13:17:45,307 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 13:17:45,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 13:17:45,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 13:17:45,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 13:17:45,327 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 13:17:45,327 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 13:17:45,328 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 13:17:45,329 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 13:17:45,330 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 13:17:45,330 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 13:17:45,331 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 13:17:45,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 13:17:45,333 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 13:17:45,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 13:17:45,335 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 13:17:45,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 13:17:45,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 13:17:45,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 13:17:45,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 13:17:45,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 13:17:45,341 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 13:17:45,367 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 13:17:45,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 13:17:45,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 13:17:45,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 13:17:45,369 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 13:17:45,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 13:17:45,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 13:17:45,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 13:17:45,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 13:17:45,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 13:17:45,371 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 13:17:45,371 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 13:17:45,372 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 13:17:45,372 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 13:17:45,372 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 13:17:45,372 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 13:17:45,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 13:17:45,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:17:45,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 13:17:45,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 13:17:45,374 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 13:17:45,374 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 13:17:45,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 13:17:45,375 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 13:17:45,375 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 13:17:45,375 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 13:17:45,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 13:17:45,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 13:17:45,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 13:17:45,864 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 13:17:45,864 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 13:17:45,865 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2020-12-22 13:17:45,952 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90e979818/865dd2e0bbfd443fb3dc4242633fc485/FLAG7973894ee [2020-12-22 13:17:46,914 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 13:17:46,915 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2020-12-22 13:17:46,972 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90e979818/865dd2e0bbfd443fb3dc4242633fc485/FLAG7973894ee [2020-12-22 13:17:47,442 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90e979818/865dd2e0bbfd443fb3dc4242633fc485 [2020-12-22 13:17:47,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 13:17:47,447 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 13:17:47,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 13:17:47,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 13:17:47,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 13:17:47,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:17:47" (1/1) ... [2020-12-22 13:17:47,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29c8ac74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:17:47, skipping insertion in model container [2020-12-22 13:17:47,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:17:47" (1/1) ... [2020-12-22 13:17:47,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 13:17:47,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 13:17:48,310 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-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i[149470,149483] [2020-12-22 13:17:48,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:17:48,702 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 13:17:48,865 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-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i[149470,149483] [2020-12-22 13:17:48,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:17:49,023 INFO L208 MainTranslator]: Completed translation [2020-12-22 13:17:49,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:17:49 WrapperNode [2020-12-22 13:17:49,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 13:17:49,025 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 13:17:49,025 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 13:17:49,026 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 13:17:49,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:17:49" (1/1) ... [2020-12-22 13:17:49,069 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:17:49" (1/1) ... [2020-12-22 13:17:49,171 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 13:17:49,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 13:17:49,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 13:17:49,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 13:17:49,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:17:49" (1/1) ... [2020-12-22 13:17:49,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:17:49" (1/1) ... [2020-12-22 13:17:49,203 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:17:49" (1/1) ... [2020-12-22 13:17:49,203 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:17:49" (1/1) ... [2020-12-22 13:17:49,382 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:17:49" (1/1) ... [2020-12-22 13:17:49,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:17:49" (1/1) ... [2020-12-22 13:17:49,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:17:49" (1/1) ... [2020-12-22 13:17:49,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 13:17:49,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 13:17:49,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 13:17:49,478 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 13:17:49,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:17:49" (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 13:17:49,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 13:17:49,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 13:17:49,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 13:17:49,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-12-22 13:17:49,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-12-22 13:17:49,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 13:17:49,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 13:17:49,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 13:17:49,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 13:17:49,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 13:17:49,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 13:17:49,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 13:17:49,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-12-22 13:17:49,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 13:17:49,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 13:17:52,136 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 13:17:52,136 INFO L299 CfgBuilder]: Removed 198 assume(true) statements. [2020-12-22 13:17:52,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:17:52 BoogieIcfgContainer [2020-12-22 13:17:52,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 13:17:52,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 13:17:52,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 13:17:52,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 13:17:52,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:17:47" (1/3) ... [2020-12-22 13:17:52,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@738845e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:17:52, skipping insertion in model container [2020-12-22 13:17:52,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:17:49" (2/3) ... [2020-12-22 13:17:52,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@738845e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:17:52, skipping insertion in model container [2020-12-22 13:17:52,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:17:52" (3/3) ... [2020-12-22 13:17:52,153 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2020-12-22 13:17:52,161 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 13:17:52,168 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 13:17:52,188 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 13:17:52,221 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 13:17:52,221 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 13:17:52,222 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 13:17:52,222 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 13:17:52,222 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 13:17:52,222 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 13:17:52,222 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 13:17:52,223 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 13:17:52,246 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states. [2020-12-22 13:17:52,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 13:17:52,254 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:52,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:17:52,256 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:52,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:52,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1448866139, now seen corresponding path program 1 times [2020-12-22 13:17:52,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:52,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847364425] [2020-12-22 13:17:52,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:52,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:17:52,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847364425] [2020-12-22 13:17:52,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:17:52,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:17:52,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060203281] [2020-12-22 13:17:52,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:17:52,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:52,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:17:52,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:17:52,819 INFO L87 Difference]: Start difference. First operand 296 states. Second operand 3 states. [2020-12-22 13:17:52,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:52,920 INFO L93 Difference]: Finished difference Result 588 states and 899 transitions. [2020-12-22 13:17:52,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:17:52,923 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-12-22 13:17:52,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:52,937 INFO L225 Difference]: With dead ends: 588 [2020-12-22 13:17:52,938 INFO L226 Difference]: Without dead ends: 290 [2020-12-22 13:17:52,943 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 13:17:52,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-12-22 13:17:53,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2020-12-22 13:17:53,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-12-22 13:17:53,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 420 transitions. [2020-12-22 13:17:53,007 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 420 transitions. Word has length 18 [2020-12-22 13:17:53,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:53,008 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 420 transitions. [2020-12-22 13:17:53,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:17:53,008 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 420 transitions. [2020-12-22 13:17:53,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 13:17:53,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:53,010 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:17:53,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 13:17:53,011 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:53,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:53,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1211009814, now seen corresponding path program 1 times [2020-12-22 13:17:53,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:53,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738759158] [2020-12-22 13:17:53,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:53,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:53,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:17:53,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738759158] [2020-12-22 13:17:53,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:17:53,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:17:53,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347386078] [2020-12-22 13:17:53,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:17:53,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:53,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:17:53,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:17:53,161 INFO L87 Difference]: Start difference. First operand 290 states and 420 transitions. Second operand 3 states. [2020-12-22 13:17:53,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:53,326 INFO L93 Difference]: Finished difference Result 828 states and 1211 transitions. [2020-12-22 13:17:53,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:17:53,327 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-22 13:17:53,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:53,336 INFO L225 Difference]: With dead ends: 828 [2020-12-22 13:17:53,336 INFO L226 Difference]: Without dead ends: 549 [2020-12-22 13:17:53,338 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 13:17:53,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2020-12-22 13:17:53,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2020-12-22 13:17:53,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 549 states. [2020-12-22 13:17:53,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 801 transitions. [2020-12-22 13:17:53,411 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 801 transitions. Word has length 19 [2020-12-22 13:17:53,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:53,412 INFO L481 AbstractCegarLoop]: Abstraction has 549 states and 801 transitions. [2020-12-22 13:17:53,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:17:53,412 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 801 transitions. [2020-12-22 13:17:53,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 13:17:53,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:53,414 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] [2020-12-22 13:17:53,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 13:17:53,417 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:53,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:53,419 INFO L82 PathProgramCache]: Analyzing trace with hash 72115822, now seen corresponding path program 1 times [2020-12-22 13:17:53,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:53,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647651691] [2020-12-22 13:17:53,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:17:53,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647651691] [2020-12-22 13:17:53,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:17:53,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:17:53,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328880984] [2020-12-22 13:17:53,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:17:53,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:53,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:17:53,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:17:53,571 INFO L87 Difference]: Start difference. First operand 549 states and 801 transitions. Second operand 4 states. [2020-12-22 13:17:53,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:53,694 INFO L93 Difference]: Finished difference Result 1086 states and 1587 transitions. [2020-12-22 13:17:53,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:17:53,696 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-12-22 13:17:53,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:53,699 INFO L225 Difference]: With dead ends: 1086 [2020-12-22 13:17:53,699 INFO L226 Difference]: Without dead ends: 548 [2020-12-22 13:17:53,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:17:53,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2020-12-22 13:17:53,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 548. [2020-12-22 13:17:53,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 548 states. [2020-12-22 13:17:53,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 797 transitions. [2020-12-22 13:17:53,723 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 797 transitions. Word has length 24 [2020-12-22 13:17:53,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:53,724 INFO L481 AbstractCegarLoop]: Abstraction has 548 states and 797 transitions. [2020-12-22 13:17:53,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:17:53,724 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 797 transitions. [2020-12-22 13:17:53,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 13:17:53,727 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:53,727 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:17:53,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 13:17:53,728 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:53,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:53,728 INFO L82 PathProgramCache]: Analyzing trace with hash -479932233, now seen corresponding path program 1 times [2020-12-22 13:17:53,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:53,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052275228] [2020-12-22 13:17:53,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 13:17:53,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052275228] [2020-12-22 13:17:53,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:17:53,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:17:53,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491615267] [2020-12-22 13:17:53,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:17:53,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:53,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:17:53,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:17:53,839 INFO L87 Difference]: Start difference. First operand 548 states and 797 transitions. Second operand 5 states. [2020-12-22 13:17:54,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:54,026 INFO L93 Difference]: Finished difference Result 1620 states and 2364 transitions. [2020-12-22 13:17:54,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:17:54,027 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-12-22 13:17:54,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:54,034 INFO L225 Difference]: With dead ends: 1620 [2020-12-22 13:17:54,034 INFO L226 Difference]: Without dead ends: 1079 [2020-12-22 13:17:54,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:17:54,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2020-12-22 13:17:54,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 1063. [2020-12-22 13:17:54,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1063 states. [2020-12-22 13:17:54,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1551 transitions. [2020-12-22 13:17:54,084 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1551 transitions. Word has length 35 [2020-12-22 13:17:54,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:54,084 INFO L481 AbstractCegarLoop]: Abstraction has 1063 states and 1551 transitions. [2020-12-22 13:17:54,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:17:54,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1551 transitions. [2020-12-22 13:17:54,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 13:17:54,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:54,090 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-12-22 13:17:54,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 13:17:54,090 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:54,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:54,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1842743390, now seen corresponding path program 1 times [2020-12-22 13:17:54,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:54,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625532642] [2020-12-22 13:17:54,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:54,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 13:17:54,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625532642] [2020-12-22 13:17:54,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:17:54,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:17:54,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031749409] [2020-12-22 13:17:54,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:17:54,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:54,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:17:54,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:17:54,187 INFO L87 Difference]: Start difference. First operand 1063 states and 1551 transitions. Second operand 3 states. [2020-12-22 13:17:54,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:54,264 INFO L93 Difference]: Finished difference Result 1660 states and 2417 transitions. [2020-12-22 13:17:54,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:17:54,264 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 13:17:54,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:54,268 INFO L225 Difference]: With dead ends: 1660 [2020-12-22 13:17:54,268 INFO L226 Difference]: Without dead ends: 608 [2020-12-22 13:17:54,270 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 13:17:54,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2020-12-22 13:17:54,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 594. [2020-12-22 13:17:54,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 594 states. [2020-12-22 13:17:54,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 861 transitions. [2020-12-22 13:17:54,296 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 861 transitions. Word has length 66 [2020-12-22 13:17:54,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:54,297 INFO L481 AbstractCegarLoop]: Abstraction has 594 states and 861 transitions. [2020-12-22 13:17:54,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:17:54,297 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 861 transitions. [2020-12-22 13:17:54,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 13:17:54,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:54,299 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-12-22 13:17:54,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 13:17:54,299 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:54,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:54,300 INFO L82 PathProgramCache]: Analyzing trace with hash -892127492, now seen corresponding path program 2 times [2020-12-22 13:17:54,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:54,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098713394] [2020-12-22 13:17:54,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:17:54,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098713394] [2020-12-22 13:17:54,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:17:54,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:17:54,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747880800] [2020-12-22 13:17:54,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:17:54,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:54,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:17:54,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:17:54,489 INFO L87 Difference]: Start difference. First operand 594 states and 861 transitions. Second operand 4 states. [2020-12-22 13:17:54,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:54,669 INFO L93 Difference]: Finished difference Result 2562 states and 3741 transitions. [2020-12-22 13:17:54,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:17:54,669 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-12-22 13:17:54,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:54,681 INFO L225 Difference]: With dead ends: 2562 [2020-12-22 13:17:54,681 INFO L226 Difference]: Without dead ends: 1992 [2020-12-22 13:17:54,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:17:54,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2020-12-22 13:17:54,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 602. [2020-12-22 13:17:54,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2020-12-22 13:17:54,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 869 transitions. [2020-12-22 13:17:54,729 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 869 transitions. Word has length 66 [2020-12-22 13:17:54,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:54,730 INFO L481 AbstractCegarLoop]: Abstraction has 602 states and 869 transitions. [2020-12-22 13:17:54,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:17:54,730 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 869 transitions. [2020-12-22 13:17:54,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 13:17:54,731 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:54,732 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-12-22 13:17:54,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 13:17:54,732 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:54,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:54,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1161719077, now seen corresponding path program 1 times [2020-12-22 13:17:54,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:54,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994604355] [2020-12-22 13:17:54,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:17:54,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994604355] [2020-12-22 13:17:54,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:17:54,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 13:17:54,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476744554] [2020-12-22 13:17:54,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 13:17:54,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:54,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 13:17:54,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 13:17:54,893 INFO L87 Difference]: Start difference. First operand 602 states and 869 transitions. Second operand 9 states. [2020-12-22 13:17:55,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:55,688 INFO L93 Difference]: Finished difference Result 3274 states and 4773 transitions. [2020-12-22 13:17:55,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 13:17:55,689 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-12-22 13:17:55,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:55,704 INFO L225 Difference]: With dead ends: 3274 [2020-12-22 13:17:55,705 INFO L226 Difference]: Without dead ends: 2696 [2020-12-22 13:17:55,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2020-12-22 13:17:55,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2020-12-22 13:17:55,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 610. [2020-12-22 13:17:55,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 610 states. [2020-12-22 13:17:55,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 877 transitions. [2020-12-22 13:17:55,771 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 877 transitions. Word has length 69 [2020-12-22 13:17:55,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:55,774 INFO L481 AbstractCegarLoop]: Abstraction has 610 states and 877 transitions. [2020-12-22 13:17:55,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 13:17:55,774 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 877 transitions. [2020-12-22 13:17:55,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 13:17:55,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:55,776 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-12-22 13:17:55,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 13:17:55,776 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:55,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:55,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1273317856, now seen corresponding path program 1 times [2020-12-22 13:17:55,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:55,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706666864] [2020-12-22 13:17:55,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:17:56,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706666864] [2020-12-22 13:17:56,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:17:56,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-22 13:17:56,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461584058] [2020-12-22 13:17:56,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 13:17:56,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:56,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 13:17:56,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-12-22 13:17:56,475 INFO L87 Difference]: Start difference. First operand 610 states and 877 transitions. Second operand 11 states. [2020-12-22 13:17:58,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:58,345 INFO L93 Difference]: Finished difference Result 2812 states and 4074 transitions. [2020-12-22 13:17:58,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 13:17:58,346 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-12-22 13:17:58,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:58,357 INFO L225 Difference]: With dead ends: 2812 [2020-12-22 13:17:58,357 INFO L226 Difference]: Without dead ends: 2226 [2020-12-22 13:17:58,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2020-12-22 13:17:58,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2020-12-22 13:17:58,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 638. [2020-12-22 13:17:58,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 638 states. [2020-12-22 13:17:58,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 905 transitions. [2020-12-22 13:17:58,457 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 905 transitions. Word has length 71 [2020-12-22 13:17:58,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:58,457 INFO L481 AbstractCegarLoop]: Abstraction has 638 states and 905 transitions. [2020-12-22 13:17:58,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 13:17:58,457 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 905 transitions. [2020-12-22 13:17:58,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 13:17:58,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:58,459 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-12-22 13:17:58,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 13:17:58,459 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:58,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:58,460 INFO L82 PathProgramCache]: Analyzing trace with hash -207364913, now seen corresponding path program 1 times [2020-12-22 13:17:58,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:58,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924399558] [2020-12-22 13:17:58,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:58,561 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:17:58,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924399558] [2020-12-22 13:17:58,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:17:58,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:17:58,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850565740] [2020-12-22 13:17:58,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:17:58,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:58,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:17:58,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:17:58,563 INFO L87 Difference]: Start difference. First operand 638 states and 905 transitions. Second operand 3 states. [2020-12-22 13:17:58,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:58,704 INFO L93 Difference]: Finished difference Result 1536 states and 2187 transitions. [2020-12-22 13:17:58,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:17:58,705 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 13:17:58,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:58,711 INFO L225 Difference]: With dead ends: 1536 [2020-12-22 13:17:58,712 INFO L226 Difference]: Without dead ends: 1222 [2020-12-22 13:17:58,713 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 13:17:58,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2020-12-22 13:17:58,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 642. [2020-12-22 13:17:58,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2020-12-22 13:17:58,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 909 transitions. [2020-12-22 13:17:58,798 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 909 transitions. Word has length 77 [2020-12-22 13:17:58,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:58,799 INFO L481 AbstractCegarLoop]: Abstraction has 642 states and 909 transitions. [2020-12-22 13:17:58,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:17:58,799 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 909 transitions. [2020-12-22 13:17:58,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 13:17:58,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:58,801 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-12-22 13:17:58,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 13:17:58,802 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:58,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:58,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1597670354, now seen corresponding path program 1 times [2020-12-22 13:17:58,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:58,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580485932] [2020-12-22 13:17:58,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:59,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:17:59,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580485932] [2020-12-22 13:17:59,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:17:59,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:17:59,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457239762] [2020-12-22 13:17:59,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:17:59,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:59,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:17:59,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:17:59,010 INFO L87 Difference]: Start difference. First operand 642 states and 909 transitions. Second operand 4 states. [2020-12-22 13:17:59,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:59,278 INFO L93 Difference]: Finished difference Result 1538 states and 2184 transitions. [2020-12-22 13:17:59,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:17:59,278 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-12-22 13:17:59,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:59,283 INFO L225 Difference]: With dead ends: 1538 [2020-12-22 13:17:59,283 INFO L226 Difference]: Without dead ends: 920 [2020-12-22 13:17:59,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:17:59,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2020-12-22 13:17:59,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 636. [2020-12-22 13:17:59,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2020-12-22 13:17:59,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 897 transitions. [2020-12-22 13:17:59,381 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 897 transitions. Word has length 79 [2020-12-22 13:17:59,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:59,382 INFO L481 AbstractCegarLoop]: Abstraction has 636 states and 897 transitions. [2020-12-22 13:17:59,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:17:59,382 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 897 transitions. [2020-12-22 13:17:59,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 13:17:59,389 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:59,391 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-12-22 13:17:59,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 13:17:59,391 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:59,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:59,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1802324330, now seen corresponding path program 1 times [2020-12-22 13:17:59,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:59,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34476959] [2020-12-22 13:17:59,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:59,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:17:59,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34476959] [2020-12-22 13:17:59,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:17:59,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:17:59,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239856119] [2020-12-22 13:17:59,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:17:59,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:59,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:17:59,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:17:59,601 INFO L87 Difference]: Start difference. First operand 636 states and 897 transitions. Second operand 3 states. [2020-12-22 13:17:59,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:59,717 INFO L93 Difference]: Finished difference Result 1519 states and 2148 transitions. [2020-12-22 13:17:59,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:17:59,718 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-12-22 13:17:59,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:59,723 INFO L225 Difference]: With dead ends: 1519 [2020-12-22 13:17:59,723 INFO L226 Difference]: Without dead ends: 907 [2020-12-22 13:17:59,725 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 13:17:59,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2020-12-22 13:17:59,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 630. [2020-12-22 13:17:59,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 630 states. [2020-12-22 13:17:59,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 885 transitions. [2020-12-22 13:17:59,803 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 885 transitions. Word has length 84 [2020-12-22 13:17:59,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:59,804 INFO L481 AbstractCegarLoop]: Abstraction has 630 states and 885 transitions. [2020-12-22 13:17:59,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:17:59,804 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 885 transitions. [2020-12-22 13:17:59,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 13:17:59,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:59,806 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-12-22 13:17:59,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 13:17:59,806 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:59,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:59,806 INFO L82 PathProgramCache]: Analyzing trace with hash 457259670, now seen corresponding path program 1 times [2020-12-22 13:17:59,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:59,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067016775] [2020-12-22 13:17:59,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:59,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:18:00,065 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:18:00,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067016775] [2020-12-22 13:18:00,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:18:00,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:18:00,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991585842] [2020-12-22 13:18:00,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:18:00,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:18:00,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:18:00,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:18:00,068 INFO L87 Difference]: Start difference. First operand 630 states and 885 transitions. Second operand 4 states. [2020-12-22 13:18:00,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:18:00,286 INFO L93 Difference]: Finished difference Result 1515 states and 2138 transitions. [2020-12-22 13:18:00,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:18:00,287 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-12-22 13:18:00,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:18:00,292 INFO L225 Difference]: With dead ends: 1515 [2020-12-22 13:18:00,292 INFO L226 Difference]: Without dead ends: 909 [2020-12-22 13:18:00,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:18:00,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2020-12-22 13:18:00,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 632. [2020-12-22 13:18:00,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 632 states. [2020-12-22 13:18:00,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 887 transitions. [2020-12-22 13:18:00,385 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 887 transitions. Word has length 84 [2020-12-22 13:18:00,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:18:00,385 INFO L481 AbstractCegarLoop]: Abstraction has 632 states and 887 transitions. [2020-12-22 13:18:00,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:18:00,385 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 887 transitions. [2020-12-22 13:18:00,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 13:18:00,387 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:18:00,387 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-12-22 13:18:00,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 13:18:00,388 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:18:00,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:18:00,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1486510631, now seen corresponding path program 1 times [2020-12-22 13:18:00,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:18:00,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540986955] [2020-12-22 13:18:00,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:18:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:18:00,553 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:18:00,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540986955] [2020-12-22 13:18:00,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009053226] [2020-12-22 13:18:00,554 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 13:18:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:18:01,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:18:01,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:18:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:18:01,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:18:01,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-12-22 13:18:01,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220095371] [2020-12-22 13:18:01,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 13:18:01,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:18:01,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 13:18:01,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:18:01,283 INFO L87 Difference]: Start difference. First operand 632 states and 887 transitions. Second operand 7 states. [2020-12-22 13:18:01,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:18:01,896 INFO L93 Difference]: Finished difference Result 2109 states and 2962 transitions. [2020-12-22 13:18:01,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:18:01,897 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 85 [2020-12-22 13:18:01,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:18:01,905 INFO L225 Difference]: With dead ends: 2109 [2020-12-22 13:18:01,905 INFO L226 Difference]: Without dead ends: 1501 [2020-12-22 13:18:01,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-12-22 13:18:01,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2020-12-22 13:18:02,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 642. [2020-12-22 13:18:02,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2020-12-22 13:18:02,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 901 transitions. [2020-12-22 13:18:02,014 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 901 transitions. Word has length 85 [2020-12-22 13:18:02,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:18:02,014 INFO L481 AbstractCegarLoop]: Abstraction has 642 states and 901 transitions. [2020-12-22 13:18:02,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 13:18:02,015 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 901 transitions. [2020-12-22 13:18:02,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 13:18:02,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:18:02,017 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-12-22 13:18:02,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 13:18:02,233 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:18:02,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:18:02,235 INFO L82 PathProgramCache]: Analyzing trace with hash 97810424, now seen corresponding path program 1 times [2020-12-22 13:18:02,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:18:02,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374855168] [2020-12-22 13:18:02,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:18:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:18:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:18:02,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374855168] [2020-12-22 13:18:02,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004648829] [2020-12-22 13:18:02,581 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 13:18:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:18:03,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 13:18:03,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:18:03,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:18:03,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:18:03,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-22 13:18:03,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324000443] [2020-12-22 13:18:03,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 13:18:03,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:18:03,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 13:18:03,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:18:03,634 INFO L87 Difference]: Start difference. First operand 642 states and 901 transitions. Second operand 8 states. [2020-12-22 13:18:03,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:18:03,965 INFO L93 Difference]: Finished difference Result 1539 states and 2170 transitions. [2020-12-22 13:18:03,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:18:03,966 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 86 [2020-12-22 13:18:03,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:18:03,971 INFO L225 Difference]: With dead ends: 1539 [2020-12-22 13:18:03,971 INFO L226 Difference]: Without dead ends: 921 [2020-12-22 13:18:03,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:18:03,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2020-12-22 13:18:04,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 644. [2020-12-22 13:18:04,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 644 states. [2020-12-22 13:18:04,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 903 transitions. [2020-12-22 13:18:04,065 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 903 transitions. Word has length 86 [2020-12-22 13:18:04,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:18:04,065 INFO L481 AbstractCegarLoop]: Abstraction has 644 states and 903 transitions. [2020-12-22 13:18:04,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 13:18:04,066 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 903 transitions. [2020-12-22 13:18:04,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 13:18:04,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:18:04,068 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-12-22 13:18:04,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 13:18:04,282 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:18:04,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:18:04,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1365505865, now seen corresponding path program 2 times [2020-12-22 13:18:04,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:18:04,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70514901] [2020-12-22 13:18:04,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:18:04,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:18:04,582 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 13:18:04,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70514901] [2020-12-22 13:18:04,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:18:04,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:18:04,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372681198] [2020-12-22 13:18:04,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:18:04,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:18:04,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:18:04,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:18:04,586 INFO L87 Difference]: Start difference. First operand 644 states and 903 transitions. Second operand 5 states. [2020-12-22 13:18:05,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:18:05,905 INFO L93 Difference]: Finished difference Result 1428 states and 2029 transitions. [2020-12-22 13:18:05,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:18:05,906 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 87 [2020-12-22 13:18:05,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:18:05,910 INFO L225 Difference]: With dead ends: 1428 [2020-12-22 13:18:05,911 INFO L226 Difference]: Without dead ends: 808 [2020-12-22 13:18:05,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:18:05,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2020-12-22 13:18:06,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 652. [2020-12-22 13:18:06,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2020-12-22 13:18:06,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 915 transitions. [2020-12-22 13:18:06,049 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 915 transitions. Word has length 87 [2020-12-22 13:18:06,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:18:06,050 INFO L481 AbstractCegarLoop]: Abstraction has 652 states and 915 transitions. [2020-12-22 13:18:06,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:18:06,050 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 915 transitions. [2020-12-22 13:18:06,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 13:18:06,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:18:06,052 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-12-22 13:18:06,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 13:18:06,053 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:18:06,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:18:06,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1349987147, now seen corresponding path program 1 times [2020-12-22 13:18:06,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:18:06,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640644806] [2020-12-22 13:18:06,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:18:06,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:18:06,412 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:18:06,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640644806] [2020-12-22 13:18:06,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892137609] [2020-12-22 13:18:06,414 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 13:18:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:18:07,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 13:18:07,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:18:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:18:08,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:18:08,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-22 13:18:08,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895716996] [2020-12-22 13:18:08,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 13:18:08,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:18:08,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 13:18:08,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:18:08,032 INFO L87 Difference]: Start difference. First operand 652 states and 915 transitions. Second operand 10 states. [2020-12-22 13:18:08,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:18:08,519 INFO L93 Difference]: Finished difference Result 1559 states and 2198 transitions. [2020-12-22 13:18:08,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:18:08,520 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 87 [2020-12-22 13:18:08,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:18:08,525 INFO L225 Difference]: With dead ends: 1559 [2020-12-22 13:18:08,525 INFO L226 Difference]: Without dead ends: 931 [2020-12-22 13:18:08,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-12-22 13:18:08,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2020-12-22 13:18:08,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 654. [2020-12-22 13:18:08,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2020-12-22 13:18:08,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 917 transitions. [2020-12-22 13:18:08,637 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 917 transitions. Word has length 87 [2020-12-22 13:18:08,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:18:08,637 INFO L481 AbstractCegarLoop]: Abstraction has 654 states and 917 transitions. [2020-12-22 13:18:08,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 13:18:08,638 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 917 transitions. [2020-12-22 13:18:08,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 13:18:08,639 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:18:08,640 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-12-22 13:18:08,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 13:18:08,855 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:18:08,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:18:08,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1528278614, now seen corresponding path program 2 times [2020-12-22 13:18:08,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:18:08,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480496024] [2020-12-22 13:18:08,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:18:09,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:18:09,246 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:18:09,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480496024] [2020-12-22 13:18:09,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550425833] [2020-12-22 13:18:09,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:18:10,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:18:10,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:18:10,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 13:18:10,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:18:11,125 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:18:11,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:18:11,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-22 13:18:11,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701251112] [2020-12-22 13:18:11,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 13:18:11,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:18:11,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 13:18:11,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-12-22 13:18:11,128 INFO L87 Difference]: Start difference. First operand 654 states and 917 transitions. Second operand 12 states. [2020-12-22 13:18:11,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:18:11,769 INFO L93 Difference]: Finished difference Result 1563 states and 2202 transitions. [2020-12-22 13:18:11,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 13:18:11,770 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 88 [2020-12-22 13:18:11,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:18:11,775 INFO L225 Difference]: With dead ends: 1563 [2020-12-22 13:18:11,775 INFO L226 Difference]: Without dead ends: 933 [2020-12-22 13:18:11,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-12-22 13:18:11,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2020-12-22 13:18:11,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 656. [2020-12-22 13:18:11,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 656 states. [2020-12-22 13:18:11,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 919 transitions. [2020-12-22 13:18:11,859 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 919 transitions. Word has length 88 [2020-12-22 13:18:11,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:18:11,859 INFO L481 AbstractCegarLoop]: Abstraction has 656 states and 919 transitions. [2020-12-22 13:18:11,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 13:18:11,860 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 919 transitions. [2020-12-22 13:18:11,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 13:18:11,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:18:11,862 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 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] [2020-12-22 13:18:12,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:18:12,075 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:18:12,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:18:12,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1534620501, now seen corresponding path program 3 times [2020-12-22 13:18:12,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:18:12,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522216117] [2020-12-22 13:18:12,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:18:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:18:12,477 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:18:12,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522216117] [2020-12-22 13:18:12,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818588234] [2020-12-22 13:18:12,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:19:41,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 13:19:41,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:19:41,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 13:19:41,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:19:41,457 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:19:41,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:19:41,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-22 13:19:41,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842020668] [2020-12-22 13:19:41,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 13:19:41,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:19:41,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 13:19:41,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-22 13:19:41,460 INFO L87 Difference]: Start difference. First operand 656 states and 919 transitions. Second operand 14 states. [2020-12-22 13:19:41,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:19:41,999 INFO L93 Difference]: Finished difference Result 1567 states and 2206 transitions. [2020-12-22 13:19:42,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 13:19:42,000 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2020-12-22 13:19:42,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:19:42,005 INFO L225 Difference]: With dead ends: 1567 [2020-12-22 13:19:42,005 INFO L226 Difference]: Without dead ends: 935 [2020-12-22 13:19:42,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-12-22 13:19:42,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2020-12-22 13:19:42,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 658. [2020-12-22 13:19:42,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 658 states. [2020-12-22 13:19:42,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 921 transitions. [2020-12-22 13:19:42,089 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 921 transitions. Word has length 89 [2020-12-22 13:19:42,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:19:42,089 INFO L481 AbstractCegarLoop]: Abstraction has 658 states and 921 transitions. [2020-12-22 13:19:42,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 13:19:42,089 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 921 transitions. [2020-12-22 13:19:42,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 13:19:42,091 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:19:42,091 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 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] [2020-12-22 13:19:42,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 13:19:42,306 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:19:42,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:19:42,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1995212554, now seen corresponding path program 4 times [2020-12-22 13:19:42,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:19:42,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080490250] [2020-12-22 13:19:42,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:19:42,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:19:42,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080490250] [2020-12-22 13:19:42,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687035333] [2020-12-22 13:19:42,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true