/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_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--smsc--smsc9420.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 13:15:28,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 13:15:28,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 13:15:28,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 13:15:28,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 13:15:28,121 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 13:15:28,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 13:15:28,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 13:15:28,140 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 13:15:28,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 13:15:28,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 13:15:28,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 13:15:28,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 13:15:28,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 13:15:28,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 13:15:28,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 13:15:28,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 13:15:28,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 13:15:28,172 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 13:15:28,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 13:15:28,183 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 13:15:28,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 13:15:28,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 13:15:28,190 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 13:15:28,199 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 13:15:28,199 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 13:15:28,200 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 13:15:28,202 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 13:15:28,203 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 13:15:28,204 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 13:15:28,205 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 13:15:28,206 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 13:15:28,208 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 13:15:28,209 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 13:15:28,210 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 13:15:28,210 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 13:15:28,211 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 13:15:28,211 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 13:15:28,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 13:15:28,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 13:15:28,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 13:15:28,215 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 13:15:28,269 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 13:15:28,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 13:15:28,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 13:15:28,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 13:15:28,275 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 13:15:28,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 13:15:28,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 13:15:28,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 13:15:28,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 13:15:28,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 13:15:28,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 13:15:28,278 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 13:15:28,279 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 13:15:28,279 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 13:15:28,279 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 13:15:28,279 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 13:15:28,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 13:15:28,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:15:28,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 13:15:28,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 13:15:28,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 13:15:28,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 13:15:28,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 13:15:28,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 13:15:28,309 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 13:15:28,309 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 13:15:28,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 13:15:28,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 13:15:28,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 13:15:28,771 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 13:15:28,772 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 13:15:28,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--smsc--smsc9420.ko-entry_point.cil.out.i [2020-12-22 13:15:28,866 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6637a7f09/adca62b3b80e46b8adb57653ea87ed89/FLAG235237d29 [2020-12-22 13:15:30,140 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 13:15:30,140 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--smsc--smsc9420.ko-entry_point.cil.out.i [2020-12-22 13:15:30,204 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6637a7f09/adca62b3b80e46b8adb57653ea87ed89/FLAG235237d29 [2020-12-22 13:15:30,449 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6637a7f09/adca62b3b80e46b8adb57653ea87ed89 [2020-12-22 13:15:30,452 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 13:15:30,454 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 13:15:30,456 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 13:15:30,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 13:15:30,461 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 13:15:30,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:15:30" (1/1) ... [2020-12-22 13:15:30,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2db0d344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:30, skipping insertion in model container [2020-12-22 13:15:30,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:15:30" (1/1) ... [2020-12-22 13:15:30,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 13:15:30,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 13:15:31,899 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_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--smsc--smsc9420.ko-entry_point.cil.out.i[172824,172837] [2020-12-22 13:15:33,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:15:33,141 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 13:15:33,326 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_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--smsc--smsc9420.ko-entry_point.cil.out.i[172824,172837] [2020-12-22 13:15:33,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:15:34,200 INFO L208 MainTranslator]: Completed translation [2020-12-22 13:15:34,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:34 WrapperNode [2020-12-22 13:15:34,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 13:15:34,203 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 13:15:34,203 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 13:15:34,203 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 13:15:34,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:34" (1/1) ... [2020-12-22 13:15:34,345 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:34" (1/1) ... [2020-12-22 13:15:34,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 13:15:34,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 13:15:34,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 13:15:34,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 13:15:34,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:34" (1/1) ... [2020-12-22 13:15:34,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:34" (1/1) ... [2020-12-22 13:15:35,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:34" (1/1) ... [2020-12-22 13:15:35,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:34" (1/1) ... [2020-12-22 13:15:35,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:34" (1/1) ... [2020-12-22 13:15:35,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:34" (1/1) ... [2020-12-22 13:15:35,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:34" (1/1) ... [2020-12-22 13:15:35,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 13:15:35,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 13:15:35,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 13:15:35,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 13:15:35,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:34" (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 13:15:35,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-12-22 13:15:35,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-12-22 13:15:35,927 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2020-12-22 13:15:35,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 13:15:35,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 13:15:35,927 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u32 [2020-12-22 13:15:35,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 13:15:35,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 13:15:35,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-12-22 13:15:35,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 13:15:35,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 13:15:35,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 13:15:35,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 13:15:35,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 13:15:35,931 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2020-12-22 13:15:35,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 13:15:35,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 13:15:35,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 13:15:55,952 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 13:15:55,953 INFO L299 CfgBuilder]: Removed 3362 assume(true) statements. [2020-12-22 13:15:55,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:15:55 BoogieIcfgContainer [2020-12-22 13:15:55,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 13:15:55,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 13:15:55,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 13:15:55,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 13:15:55,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:15:30" (1/3) ... [2020-12-22 13:15:55,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8cbdf96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:15:55, skipping insertion in model container [2020-12-22 13:15:55,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:34" (2/3) ... [2020-12-22 13:15:55,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8cbdf96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:15:55, skipping insertion in model container [2020-12-22 13:15:55,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:15:55" (3/3) ... [2020-12-22 13:15:55,975 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--smsc--smsc9420.ko-entry_point.cil.out.i [2020-12-22 13:15:55,983 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 13:15:55,991 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 13:15:56,013 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 13:15:56,070 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 13:15:56,071 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 13:15:56,071 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 13:15:56,071 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 13:15:56,071 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 13:15:56,071 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 13:15:56,072 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 13:15:56,072 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 13:15:56,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states. [2020-12-22 13:15:56,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 13:15:56,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:56,164 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:15:56,164 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:56,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:56,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1461368549, now seen corresponding path program 1 times [2020-12-22 13:15:56,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:56,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363045230] [2020-12-22 13:15:56,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:57,082 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 13:15:57,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363045230] [2020-12-22 13:15:57,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:15:57,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:15:57,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133628230] [2020-12-22 13:15:57,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:15:57,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:57,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:15:57,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:15:57,123 INFO L87 Difference]: Start difference. First operand 2776 states. Second operand 3 states. [2020-12-22 13:15:57,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:57,333 INFO L93 Difference]: Finished difference Result 5548 states and 7315 transitions. [2020-12-22 13:15:57,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:15:57,335 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-12-22 13:15:57,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:57,368 INFO L225 Difference]: With dead ends: 5548 [2020-12-22 13:15:57,368 INFO L226 Difference]: Without dead ends: 2690 [2020-12-22 13:15:57,381 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 13:15:57,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2020-12-22 13:15:57,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2690. [2020-12-22 13:15:57,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2690 states. [2020-12-22 13:15:57,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2690 states to 2690 states and 3428 transitions. [2020-12-22 13:15:57,535 INFO L78 Accepts]: Start accepts. Automaton has 2690 states and 3428 transitions. Word has length 37 [2020-12-22 13:15:57,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:57,536 INFO L481 AbstractCegarLoop]: Abstraction has 2690 states and 3428 transitions. [2020-12-22 13:15:57,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:15:57,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2690 states and 3428 transitions. [2020-12-22 13:15:57,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 13:15:57,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:57,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:15:57,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 13:15:57,539 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:57,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:57,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1539984818, now seen corresponding path program 1 times [2020-12-22 13:15:57,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:57,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907093276] [2020-12-22 13:15:57,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:57,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:57,826 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 13:15:57,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907093276] [2020-12-22 13:15:57,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:15:57,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:15:57,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225405134] [2020-12-22 13:15:57,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:15:57,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:57,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:15:57,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:15:57,832 INFO L87 Difference]: Start difference. First operand 2690 states and 3428 transitions. Second operand 3 states. [2020-12-22 13:16:00,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:00,195 INFO L93 Difference]: Finished difference Result 7829 states and 10015 transitions. [2020-12-22 13:16:00,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:16:00,196 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-12-22 13:16:00,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:00,229 INFO L225 Difference]: With dead ends: 7829 [2020-12-22 13:16:00,229 INFO L226 Difference]: Without dead ends: 5235 [2020-12-22 13:16:00,236 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 13:16:00,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5235 states. [2020-12-22 13:16:00,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5235 to 5235. [2020-12-22 13:16:00,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5235 states. [2020-12-22 13:16:00,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5235 states to 5235 states and 6691 transitions. [2020-12-22 13:16:00,412 INFO L78 Accepts]: Start accepts. Automaton has 5235 states and 6691 transitions. Word has length 38 [2020-12-22 13:16:00,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:00,413 INFO L481 AbstractCegarLoop]: Abstraction has 5235 states and 6691 transitions. [2020-12-22 13:16:00,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:16:00,413 INFO L276 IsEmpty]: Start isEmpty. Operand 5235 states and 6691 transitions. [2020-12-22 13:16:00,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 13:16:00,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:00,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:16:00,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 13:16:00,416 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:00,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:00,417 INFO L82 PathProgramCache]: Analyzing trace with hash 888841163, now seen corresponding path program 1 times [2020-12-22 13:16:00,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:00,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861297626] [2020-12-22 13:16:00,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:00,729 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 13:16:00,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861297626] [2020-12-22 13:16:00,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:00,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:16:00,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414852326] [2020-12-22 13:16:00,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:16:00,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:00,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:16:00,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:16:00,732 INFO L87 Difference]: Start difference. First operand 5235 states and 6691 transitions. Second operand 5 states. [2020-12-22 13:16:01,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:01,430 INFO L93 Difference]: Finished difference Result 15511 states and 19858 transitions. [2020-12-22 13:16:01,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:16:01,431 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-12-22 13:16:01,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:01,487 INFO L225 Difference]: With dead ends: 15511 [2020-12-22 13:16:01,487 INFO L226 Difference]: Without dead ends: 10368 [2020-12-22 13:16:01,498 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 13:16:01,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10368 states. [2020-12-22 13:16:01,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10368 to 10368. [2020-12-22 13:16:01,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10368 states. [2020-12-22 13:16:01,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10368 states to 10368 states and 13263 transitions. [2020-12-22 13:16:01,928 INFO L78 Accepts]: Start accepts. Automaton has 10368 states and 13263 transitions. Word has length 44 [2020-12-22 13:16:01,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:01,929 INFO L481 AbstractCegarLoop]: Abstraction has 10368 states and 13263 transitions. [2020-12-22 13:16:01,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:16:01,929 INFO L276 IsEmpty]: Start isEmpty. Operand 10368 states and 13263 transitions. [2020-12-22 13:16:01,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-12-22 13:16:01,960 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:01,961 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:16:01,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 13:16:01,961 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:01,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:01,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1913287317, now seen corresponding path program 1 times [2020-12-22 13:16:01,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:01,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424627873] [2020-12-22 13:16:01,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:16:02,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424627873] [2020-12-22 13:16:02,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:02,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:16:02,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998488070] [2020-12-22 13:16:02,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:16:02,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:02,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:16:02,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:16:02,478 INFO L87 Difference]: Start difference. First operand 10368 states and 13263 transitions. Second operand 3 states. [2020-12-22 13:16:03,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:03,432 INFO L93 Difference]: Finished difference Result 26160 states and 33573 transitions. [2020-12-22 13:16:03,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:16:03,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 208 [2020-12-22 13:16:03,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:03,550 INFO L225 Difference]: With dead ends: 26160 [2020-12-22 13:16:03,550 INFO L226 Difference]: Without dead ends: 15888 [2020-12-22 13:16:03,577 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 13:16:03,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15888 states. [2020-12-22 13:16:04,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15888 to 15210. [2020-12-22 13:16:04,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15210 states. [2020-12-22 13:16:04,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15210 states to 15210 states and 19516 transitions. [2020-12-22 13:16:04,533 INFO L78 Accepts]: Start accepts. Automaton has 15210 states and 19516 transitions. Word has length 208 [2020-12-22 13:16:04,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:04,536 INFO L481 AbstractCegarLoop]: Abstraction has 15210 states and 19516 transitions. [2020-12-22 13:16:04,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:16:04,536 INFO L276 IsEmpty]: Start isEmpty. Operand 15210 states and 19516 transitions. [2020-12-22 13:16:04,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-12-22 13:16:04,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:04,560 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:16:04,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 13:16:04,560 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:04,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:04,561 INFO L82 PathProgramCache]: Analyzing trace with hash -747005645, now seen corresponding path program 1 times [2020-12-22 13:16:04,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:04,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001514440] [2020-12-22 13:16:04,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:16:04,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001514440] [2020-12-22 13:16:04,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:04,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:16:04,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782213335] [2020-12-22 13:16:04,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:16:04,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:04,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:16:04,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:16:04,940 INFO L87 Difference]: Start difference. First operand 15210 states and 19516 transitions. Second operand 3 states. [2020-12-22 13:16:05,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:05,876 INFO L93 Difference]: Finished difference Result 38950 states and 50136 transitions. [2020-12-22 13:16:05,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:16:05,877 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 223 [2020-12-22 13:16:05,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:05,937 INFO L225 Difference]: With dead ends: 38950 [2020-12-22 13:16:05,938 INFO L226 Difference]: Without dead ends: 23836 [2020-12-22 13:16:05,977 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 13:16:06,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23836 states. [2020-12-22 13:16:07,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23836 to 23830. [2020-12-22 13:16:07,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23830 states. [2020-12-22 13:16:07,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23830 states to 23830 states and 30714 transitions. [2020-12-22 13:16:07,132 INFO L78 Accepts]: Start accepts. Automaton has 23830 states and 30714 transitions. Word has length 223 [2020-12-22 13:16:07,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:07,133 INFO L481 AbstractCegarLoop]: Abstraction has 23830 states and 30714 transitions. [2020-12-22 13:16:07,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:16:07,133 INFO L276 IsEmpty]: Start isEmpty. Operand 23830 states and 30714 transitions. [2020-12-22 13:16:07,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-12-22 13:16:07,164 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:07,165 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:16:07,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 13:16:07,167 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:07,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:07,168 INFO L82 PathProgramCache]: Analyzing trace with hash -604853874, now seen corresponding path program 1 times [2020-12-22 13:16:07,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:07,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228036754] [2020-12-22 13:16:07,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:07,716 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:16:07,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228036754] [2020-12-22 13:16:07,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:07,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:16:07,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241004307] [2020-12-22 13:16:07,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:16:07,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:07,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:16:07,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:16:07,719 INFO L87 Difference]: Start difference. First operand 23830 states and 30714 transitions. Second operand 3 states. [2020-12-22 13:16:10,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:10,849 INFO L93 Difference]: Finished difference Result 56278 states and 72692 transitions. [2020-12-22 13:16:10,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:16:10,850 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 240 [2020-12-22 13:16:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:10,931 INFO L225 Difference]: With dead ends: 56278 [2020-12-22 13:16:10,932 INFO L226 Difference]: Without dead ends: 32544 [2020-12-22 13:16:11,120 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 13:16:11,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32544 states. [2020-12-22 13:16:12,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32544 to 32538. [2020-12-22 13:16:12,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32538 states. [2020-12-22 13:16:12,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32538 states to 32538 states and 42032 transitions. [2020-12-22 13:16:12,278 INFO L78 Accepts]: Start accepts. Automaton has 32538 states and 42032 transitions. Word has length 240 [2020-12-22 13:16:12,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:12,288 INFO L481 AbstractCegarLoop]: Abstraction has 32538 states and 42032 transitions. [2020-12-22 13:16:12,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:16:12,289 INFO L276 IsEmpty]: Start isEmpty. Operand 32538 states and 42032 transitions. [2020-12-22 13:16:12,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-12-22 13:16:12,436 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:12,437 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:16:12,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 13:16:12,437 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:12,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:12,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1880802480, now seen corresponding path program 1 times [2020-12-22 13:16:12,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:12,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229919252] [2020-12-22 13:16:12,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:16:12,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229919252] [2020-12-22 13:16:12,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:12,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:16:12,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463626340] [2020-12-22 13:16:12,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:16:12,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:12,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:16:12,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:16:12,908 INFO L87 Difference]: Start difference. First operand 32538 states and 42032 transitions. Second operand 4 states. [2020-12-22 13:16:16,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:16,421 INFO L93 Difference]: Finished difference Result 74722 states and 96586 transitions. [2020-12-22 13:16:16,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:16:16,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 255 [2020-12-22 13:16:16,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:16,520 INFO L225 Difference]: With dead ends: 74722 [2020-12-22 13:16:16,520 INFO L226 Difference]: Without dead ends: 42280 [2020-12-22 13:16:16,566 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 13:16:16,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42280 states. [2020-12-22 13:16:17,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42280 to 32546. [2020-12-22 13:16:17,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32546 states. [2020-12-22 13:16:17,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32546 states to 32546 states and 42036 transitions. [2020-12-22 13:16:17,931 INFO L78 Accepts]: Start accepts. Automaton has 32546 states and 42036 transitions. Word has length 255 [2020-12-22 13:16:17,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:17,932 INFO L481 AbstractCegarLoop]: Abstraction has 32546 states and 42036 transitions. [2020-12-22 13:16:17,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:16:17,932 INFO L276 IsEmpty]: Start isEmpty. Operand 32546 states and 42036 transitions. [2020-12-22 13:16:17,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-12-22 13:16:17,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:17,980 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:16:17,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 13:16:17,981 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:17,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:17,981 INFO L82 PathProgramCache]: Analyzing trace with hash -873146403, now seen corresponding path program 1 times [2020-12-22 13:16:17,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:17,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371703586] [2020-12-22 13:16:17,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:18,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:18,527 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:16:18,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371703586] [2020-12-22 13:16:18,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:18,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:16:18,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604091734] [2020-12-22 13:16:18,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:16:18,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:18,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:16:18,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:16:18,530 INFO L87 Difference]: Start difference. First operand 32546 states and 42036 transitions. Second operand 3 states. [2020-12-22 13:16:19,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:19,613 INFO L93 Difference]: Finished difference Result 65044 states and 84021 transitions. [2020-12-22 13:16:19,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:16:19,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 325 [2020-12-22 13:16:19,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:19,678 INFO L225 Difference]: With dead ends: 65044 [2020-12-22 13:16:19,679 INFO L226 Difference]: Without dead ends: 32594 [2020-12-22 13:16:19,709 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 13:16:19,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32594 states. [2020-12-22 13:16:20,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32594 to 32550. [2020-12-22 13:16:20,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32550 states. [2020-12-22 13:16:20,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32550 states to 32550 states and 42040 transitions. [2020-12-22 13:16:20,720 INFO L78 Accepts]: Start accepts. Automaton has 32550 states and 42040 transitions. Word has length 325 [2020-12-22 13:16:20,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:20,721 INFO L481 AbstractCegarLoop]: Abstraction has 32550 states and 42040 transitions. [2020-12-22 13:16:20,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:16:20,721 INFO L276 IsEmpty]: Start isEmpty. Operand 32550 states and 42040 transitions. [2020-12-22 13:16:20,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-12-22 13:16:20,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:20,754 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:16:20,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 13:16:20,755 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:20,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:20,756 INFO L82 PathProgramCache]: Analyzing trace with hash -601091809, now seen corresponding path program 1 times [2020-12-22 13:16:20,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:20,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880715061] [2020-12-22 13:16:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:16:21,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880715061] [2020-12-22 13:16:21,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239284464] [2020-12-22 13:16:21,648 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 13:16:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:24,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 5070 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 13:16:24,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:16:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:16:24,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:16:24,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 13:16:24,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377841122] [2020-12-22 13:16:24,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:16:24,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:24,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:16:24,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:16:24,548 INFO L87 Difference]: Start difference. First operand 32550 states and 42040 transitions. Second operand 3 states. [2020-12-22 13:16:25,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:25,764 INFO L93 Difference]: Finished difference Result 75200 states and 97607 transitions. [2020-12-22 13:16:25,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:16:25,764 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 325 [2020-12-22 13:16:25,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:25,826 INFO L225 Difference]: With dead ends: 75200 [2020-12-22 13:16:25,826 INFO L226 Difference]: Without dead ends: 42746 [2020-12-22 13:16:25,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:16:25,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42746 states. [2020-12-22 13:16:27,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42746 to 42064. [2020-12-22 13:16:27,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42064 states. [2020-12-22 13:16:27,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42064 states to 42064 states and 54581 transitions. [2020-12-22 13:16:27,115 INFO L78 Accepts]: Start accepts. Automaton has 42064 states and 54581 transitions. Word has length 325 [2020-12-22 13:16:27,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:27,116 INFO L481 AbstractCegarLoop]: Abstraction has 42064 states and 54581 transitions. [2020-12-22 13:16:27,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:16:27,116 INFO L276 IsEmpty]: Start isEmpty. Operand 42064 states and 54581 transitions. [2020-12-22 13:16:27,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-12-22 13:16:27,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:27,153 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:16:27,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 13:16:27,370 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:27,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:27,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1092559955, now seen corresponding path program 1 times [2020-12-22 13:16:27,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:27,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512899375] [2020-12-22 13:16:27,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:27,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:16:28,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512899375] [2020-12-22 13:16:28,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:28,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:16:28,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442900180] [2020-12-22 13:16:28,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:16:28,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:28,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:16:28,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:16:28,241 INFO L87 Difference]: Start difference. First operand 42064 states and 54581 transitions. Second operand 3 states. [2020-12-22 13:16:29,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:29,722 INFO L93 Difference]: Finished difference Result 95020 states and 123492 transitions. [2020-12-22 13:16:29,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:16:29,723 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 340 [2020-12-22 13:16:29,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:29,799 INFO L225 Difference]: With dead ends: 95020 [2020-12-22 13:16:29,799 INFO L226 Difference]: Without dead ends: 53052 [2020-12-22 13:16:29,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 13:16:29,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53052 states. [2020-12-22 13:16:31,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53052 to 53046. [2020-12-22 13:16:31,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53046 states. [2020-12-22 13:16:31,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53046 states to 53046 states and 68989 transitions. [2020-12-22 13:16:31,613 INFO L78 Accepts]: Start accepts. Automaton has 53046 states and 68989 transitions. Word has length 340 [2020-12-22 13:16:31,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:31,613 INFO L481 AbstractCegarLoop]: Abstraction has 53046 states and 68989 transitions. [2020-12-22 13:16:31,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:16:31,613 INFO L276 IsEmpty]: Start isEmpty. Operand 53046 states and 68989 transitions. [2020-12-22 13:16:31,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-12-22 13:16:31,653 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:31,654 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:16:31,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 13:16:31,654 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:31,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:31,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1044623355, now seen corresponding path program 1 times [2020-12-22 13:16:31,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:31,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090139651] [2020-12-22 13:16:31,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:31,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 13:16:32,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090139651] [2020-12-22 13:16:32,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404510500] [2020-12-22 13:16:32,219 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 13:16:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:34,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 5121 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 13:16:34,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:16:34,968 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 13:16:34,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:16:34,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 13:16:34,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904302926] [2020-12-22 13:16:34,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:16:34,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:34,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:16:34,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:16:34,971 INFO L87 Difference]: Start difference. First operand 53046 states and 68989 transitions. Second operand 3 states. [2020-12-22 13:16:37,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:37,367 INFO L93 Difference]: Finished difference Result 147438 states and 192515 transitions. [2020-12-22 13:16:37,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:16:37,368 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 344 [2020-12-22 13:16:37,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:37,491 INFO L225 Difference]: With dead ends: 147438 [2020-12-22 13:16:37,491 INFO L226 Difference]: Without dead ends: 94488 [2020-12-22 13:16:37,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:16:37,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94488 states. [2020-12-22 13:16:39,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94488 to 53074. [2020-12-22 13:16:39,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53074 states. [2020-12-22 13:16:39,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53074 states to 53074 states and 69017 transitions. [2020-12-22 13:16:39,681 INFO L78 Accepts]: Start accepts. Automaton has 53074 states and 69017 transitions. Word has length 344 [2020-12-22 13:16:39,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:39,681 INFO L481 AbstractCegarLoop]: Abstraction has 53074 states and 69017 transitions. [2020-12-22 13:16:39,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:16:39,682 INFO L276 IsEmpty]: Start isEmpty. Operand 53074 states and 69017 transitions. [2020-12-22 13:16:39,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-12-22 13:16:39,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:39,722 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:16:39,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:16:39,938 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:39,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:39,940 INFO L82 PathProgramCache]: Analyzing trace with hash -2025578169, now seen corresponding path program 1 times [2020-12-22 13:16:39,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:39,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495189389] [2020-12-22 13:16:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:40,156 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 13:16:40,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [105336820] [2020-12-22 13:16:40,157 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 13:16:42,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:42,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 5120 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 13:16:42,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:16:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 13:16:43,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495189389] [2020-12-22 13:16:43,217 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 13:16:43,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105336820] [2020-12-22 13:16:43,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:43,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:16:43,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663050307] [2020-12-22 13:16:43,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:16:43,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:43,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:16:43,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:16:43,220 INFO L87 Difference]: Start difference. First operand 53074 states and 69017 transitions. Second operand 3 states. [2020-12-22 13:16:46,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:46,431 INFO L93 Difference]: Finished difference Result 158022 states and 205633 transitions. [2020-12-22 13:16:46,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:16:46,432 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 344 [2020-12-22 13:16:46,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:46,586 INFO L225 Difference]: With dead ends: 158022 [2020-12-22 13:16:46,586 INFO L226 Difference]: Without dead ends: 105044 [2020-12-22 13:16:46,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 342 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 13:16:46,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105044 states. [2020-12-22 13:16:49,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105044 to 53130. [2020-12-22 13:16:49,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53130 states. [2020-12-22 13:16:49,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53130 states to 53130 states and 69073 transitions. [2020-12-22 13:16:49,108 INFO L78 Accepts]: Start accepts. Automaton has 53130 states and 69073 transitions. Word has length 344 [2020-12-22 13:16:49,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:49,109 INFO L481 AbstractCegarLoop]: Abstraction has 53130 states and 69073 transitions. [2020-12-22 13:16:49,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:16:49,109 INFO L276 IsEmpty]: Start isEmpty. Operand 53130 states and 69073 transitions. [2020-12-22 13:16:49,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-12-22 13:16:49,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:49,142 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:16:49,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 13:16:49,344 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:49,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:49,344 INFO L82 PathProgramCache]: Analyzing trace with hash 533034435, now seen corresponding path program 1 times [2020-12-22 13:16:49,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:49,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086710066] [2020-12-22 13:16:49,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:49,543 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 13:16:49,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117836816] [2020-12-22 13:16:49,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:16:52,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:52,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 5133 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 13:16:52,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:16:52,804 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-22 13:16:52,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086710066] [2020-12-22 13:16:52,804 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 13:16:52,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117836816] [2020-12-22 13:16:52,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:52,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:16:52,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526120790] [2020-12-22 13:16:52,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:16:52,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:52,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:16:52,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:16:52,807 INFO L87 Difference]: Start difference. First operand 53130 states and 69073 transitions. Second operand 3 states. [2020-12-22 13:16:56,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:56,265 INFO L93 Difference]: Finished difference Result 159114 states and 206837 transitions. [2020-12-22 13:16:56,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:16:56,266 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 346 [2020-12-22 13:16:56,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:56,414 INFO L225 Difference]: With dead ends: 159114 [2020-12-22 13:16:56,415 INFO L226 Difference]: Without dead ends: 106080 [2020-12-22 13:16:56,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 344 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 13:16:56,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106080 states. [2020-12-22 13:16:59,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106080 to 93978. [2020-12-22 13:16:59,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93978 states. [2020-12-22 13:17:00,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93978 states to 93978 states and 122998 transitions. [2020-12-22 13:17:00,302 INFO L78 Accepts]: Start accepts. Automaton has 93978 states and 122998 transitions. Word has length 346 [2020-12-22 13:17:00,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:00,303 INFO L481 AbstractCegarLoop]: Abstraction has 93978 states and 122998 transitions. [2020-12-22 13:17:00,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:17:00,318 INFO L276 IsEmpty]: Start isEmpty. Operand 93978 states and 122998 transitions. [2020-12-22 13:17:00,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-12-22 13:17:00,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:00,392 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:17:00,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:17:00,609 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:00,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:00,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1592378164, now seen corresponding path program 1 times [2020-12-22 13:17:00,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:00,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426479535] [2020-12-22 13:17:00,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:00,818 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 13:17:00,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060388750] [2020-12-22 13:17:00,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:17:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:03,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 5134 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 13:17:03,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:17:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-22 13:17:03,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426479535] [2020-12-22 13:17:03,926 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 13:17:03,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060388750] [2020-12-22 13:17:03,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:17:03,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:17:03,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680693382] [2020-12-22 13:17:03,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:17:03,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:03,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:17:03,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:17:03,933 INFO L87 Difference]: Start difference. First operand 93978 states and 122998 transitions. Second operand 3 states. [2020-12-22 13:17:10,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:10,161 INFO L93 Difference]: Finished difference Result 281686 states and 368668 transitions. [2020-12-22 13:17:10,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:17:10,162 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 347 [2020-12-22 13:17:10,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:10,465 INFO L225 Difference]: With dead ends: 281686 [2020-12-22 13:17:10,465 INFO L226 Difference]: Without dead ends: 187804 [2020-12-22 13:17:10,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 345 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 13:17:10,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187804 states. [2020-12-22 13:17:17,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187804 to 187798. [2020-12-22 13:17:17,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187798 states. [2020-12-22 13:17:18,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187798 states to 187798 states and 245632 transitions. [2020-12-22 13:17:18,027 INFO L78 Accepts]: Start accepts. Automaton has 187798 states and 245632 transitions. Word has length 347 [2020-12-22 13:17:18,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:18,028 INFO L481 AbstractCegarLoop]: Abstraction has 187798 states and 245632 transitions. [2020-12-22 13:17:18,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:17:18,028 INFO L276 IsEmpty]: Start isEmpty. Operand 187798 states and 245632 transitions. [2020-12-22 13:17:18,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-12-22 13:17:18,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:18,137 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:17:18,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 13:17:18,338 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:18,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:18,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1014768294, now seen corresponding path program 1 times [2020-12-22 13:17:18,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:18,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629637545] [2020-12-22 13:17:18,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:18,542 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 13:17:18,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [257532471] [2020-12-22 13:17:18,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:17:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:21,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 5157 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:17:21,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:17:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-22 13:17:21,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629637545] [2020-12-22 13:17:21,792 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 13:17:21,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257532471] [2020-12-22 13:17:21,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:17:21,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-22 13:17:21,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7412393] [2020-12-22 13:17:21,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:17:21,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:21,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:17:21,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:17:21,795 INFO L87 Difference]: Start difference. First operand 187798 states and 245632 transitions. Second operand 4 states. [2020-12-22 13:17:29,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:29,154 INFO L93 Difference]: Finished difference Result 375502 states and 491160 transitions. [2020-12-22 13:17:29,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:17:29,155 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 347 [2020-12-22 13:17:29,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:29,817 INFO L225 Difference]: With dead ends: 375502 [2020-12-22 13:17:29,818 INFO L226 Difference]: Without dead ends: 187799 [2020-12-22 13:17:30,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:17:30,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187799 states. [2020-12-22 13:17:37,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187799 to 187799. [2020-12-22 13:17:37,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187799 states. [2020-12-22 13:17:38,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187799 states to 187799 states and 245633 transitions. [2020-12-22 13:17:38,025 INFO L78 Accepts]: Start accepts. Automaton has 187799 states and 245633 transitions. Word has length 347 [2020-12-22 13:17:38,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:38,026 INFO L481 AbstractCegarLoop]: Abstraction has 187799 states and 245633 transitions. [2020-12-22 13:17:38,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:17:38,026 INFO L276 IsEmpty]: Start isEmpty. Operand 187799 states and 245633 transitions. [2020-12-22 13:17:38,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-12-22 13:17:38,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:38,260 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:17:38,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:17:38,476 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:38,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:38,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1121685501, now seen corresponding path program 2 times [2020-12-22 13:17:38,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:38,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981496742] [2020-12-22 13:17:38,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:38,699 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 13:17:38,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [375904800] [2020-12-22 13:17:38,700 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true