/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--caif--caif_hsi.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 13:14:42,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 13:14:42,161 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 13:14:42,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 13:14:42,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 13:14:42,218 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 13:14:42,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 13:14:42,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 13:14:42,232 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 13:14:42,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 13:14:42,242 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 13:14:42,243 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 13:14:42,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 13:14:42,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 13:14:42,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 13:14:42,251 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 13:14:42,252 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 13:14:42,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 13:14:42,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 13:14:42,272 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 13:14:42,274 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 13:14:42,275 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 13:14:42,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 13:14:42,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 13:14:42,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 13:14:42,282 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 13:14:42,282 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 13:14:42,283 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 13:14:42,284 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 13:14:42,288 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 13:14:42,288 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 13:14:42,290 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 13:14:42,291 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 13:14:42,296 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 13:14:42,297 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 13:14:42,297 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 13:14:42,299 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 13:14:42,299 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 13:14:42,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 13:14:42,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 13:14:42,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 13:14:42,302 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 13:14:42,362 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 13:14:42,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 13:14:42,364 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 13:14:42,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 13:14:42,365 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 13:14:42,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 13:14:42,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 13:14:42,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 13:14:42,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 13:14:42,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 13:14:42,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 13:14:42,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 13:14:42,367 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 13:14:42,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 13:14:42,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 13:14:42,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 13:14:42,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 13:14:42,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:14:42,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 13:14:42,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 13:14:42,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 13:14:42,371 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 13:14:42,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 13:14:42,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 13:14:42,371 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 13:14:42,371 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 13:14:42,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 13:14:42,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 13:14:42,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 13:14:42,835 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 13:14:42,835 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 13:14:42,836 INFO L432 ainManager$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--caif--caif_hsi.ko-entry_point.cil.out.i [2020-12-22 13:14:42,923 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c61830e6b/d25917a4713545b098e9e39c1de1902a/FLAG986adc69f [2020-12-22 13:14:44,054 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 13:14:44,055 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--caif--caif_hsi.ko-entry_point.cil.out.i [2020-12-22 13:14:44,091 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c61830e6b/d25917a4713545b098e9e39c1de1902a/FLAG986adc69f [2020-12-22 13:14:44,387 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c61830e6b/d25917a4713545b098e9e39c1de1902a [2020-12-22 13:14:44,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 13:14:44,392 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 13:14:44,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 13:14:44,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 13:14:44,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 13:14:44,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:14:44" (1/1) ... [2020-12-22 13:14:44,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c79fdb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:44, skipping insertion in model container [2020-12-22 13:14:44,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:14:44" (1/1) ... [2020-12-22 13:14:44,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 13:14:44,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 13:14:45,612 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--caif--caif_hsi.ko-entry_point.cil.out.i[158583,158596] [2020-12-22 13:14:46,384 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:14:46,412 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 13:14:46,600 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--caif--caif_hsi.ko-entry_point.cil.out.i[158583,158596] [2020-12-22 13:14:46,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:14:47,182 INFO L208 MainTranslator]: Completed translation [2020-12-22 13:14:47,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:47 WrapperNode [2020-12-22 13:14:47,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 13:14:47,185 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 13:14:47,185 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 13:14:47,186 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 13:14:47,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:47" (1/1) ... [2020-12-22 13:14:47,321 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:47" (1/1) ... [2020-12-22 13:14:47,953 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 13:14:47,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 13:14:47,957 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 13:14:47,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 13:14:47,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:47" (1/1) ... [2020-12-22 13:14:47,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:47" (1/1) ... [2020-12-22 13:14:48,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:47" (1/1) ... [2020-12-22 13:14:48,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:47" (1/1) ... [2020-12-22 13:14:48,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:47" (1/1) ... [2020-12-22 13:14:48,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:47" (1/1) ... [2020-12-22 13:14:48,842 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:47" (1/1) ... [2020-12-22 13:14:48,934 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 13:14:48,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 13:14:48,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 13:14:48,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 13:14:48,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:47" (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 13:14:49,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-12-22 13:14:49,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-12-22 13:14:49,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 13:14:49,049 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 13:14:49,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 13:14:49,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 13:14:49,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-12-22 13:14:49,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 13:14:49,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 13:14:49,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 13:14:49,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 13:14:49,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 13:14:49,051 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2020-12-22 13:14:49,051 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2020-12-22 13:14:49,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2020-12-22 13:14:49,052 INFO L130 BoogieDeclarations]: Found specification of procedure cfhsi_open [2020-12-22 13:14:49,052 INFO L138 BoogieDeclarations]: Found implementation of procedure cfhsi_open [2020-12-22 13:14:49,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 13:14:49,052 INFO L130 BoogieDeclarations]: Found specification of procedure cfhsi_close [2020-12-22 13:14:49,052 INFO L138 BoogieDeclarations]: Found implementation of procedure cfhsi_close [2020-12-22 13:14:49,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 13:14:49,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 13:15:12,771 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 13:15:12,771 INFO L299 CfgBuilder]: Removed 2489 assume(true) statements. [2020-12-22 13:15:12,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:15:12 BoogieIcfgContainer [2020-12-22 13:15:12,778 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 13:15:12,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 13:15:12,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 13:15:12,784 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 13:15:12,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:14:44" (1/3) ... [2020-12-22 13:15:12,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76d739d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:15:12, skipping insertion in model container [2020-12-22 13:15:12,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:47" (2/3) ... [2020-12-22 13:15:12,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76d739d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:15:12, skipping insertion in model container [2020-12-22 13:15:12,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:15:12" (3/3) ... [2020-12-22 13:15:12,787 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--caif--caif_hsi.ko-entry_point.cil.out.i [2020-12-22 13:15:12,794 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 13:15:12,801 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 13:15:12,821 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 13:15:12,880 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 13:15:12,881 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 13:15:12,881 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 13:15:12,882 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 13:15:12,882 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 13:15:12,882 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 13:15:12,882 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 13:15:12,882 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 13:15:12,952 INFO L276 IsEmpty]: Start isEmpty. Operand 2940 states. [2020-12-22 13:15:12,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 13:15:12,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:12,980 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] [2020-12-22 13:15:12,981 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:12,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:12,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1824939026, now seen corresponding path program 1 times [2020-12-22 13:15:13,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:13,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168106549] [2020-12-22 13:15:13,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:13,823 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 13:15:13,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168106549] [2020-12-22 13:15:13,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:15:13,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:15:13,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106455219] [2020-12-22 13:15:13,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:15:13,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:13,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:15:13,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:15:13,852 INFO L87 Difference]: Start difference. First operand 2940 states. Second operand 3 states. [2020-12-22 13:15:16,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:16,445 INFO L93 Difference]: Finished difference Result 8754 states and 13070 transitions. [2020-12-22 13:15:16,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:15:16,449 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-12-22 13:15:16,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:16,513 INFO L225 Difference]: With dead ends: 8754 [2020-12-22 13:15:16,513 INFO L226 Difference]: Without dead ends: 5807 [2020-12-22 13:15:16,740 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 13:15:16,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5807 states. [2020-12-22 13:15:17,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5807 to 5807. [2020-12-22 13:15:17,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5807 states. [2020-12-22 13:15:17,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5807 states to 5807 states and 8155 transitions. [2020-12-22 13:15:17,091 INFO L78 Accepts]: Start accepts. Automaton has 5807 states and 8155 transitions. Word has length 23 [2020-12-22 13:15:17,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:17,091 INFO L481 AbstractCegarLoop]: Abstraction has 5807 states and 8155 transitions. [2020-12-22 13:15:17,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:15:17,092 INFO L276 IsEmpty]: Start isEmpty. Operand 5807 states and 8155 transitions. [2020-12-22 13:15:17,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 13:15:17,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:17,096 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] [2020-12-22 13:15:17,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 13:15:17,097 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:17,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:17,100 INFO L82 PathProgramCache]: Analyzing trace with hash 666202280, now seen corresponding path program 1 times [2020-12-22 13:15:17,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:17,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819820740] [2020-12-22 13:15:17,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:17,522 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 13:15:17,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819820740] [2020-12-22 13:15:17,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:15:17,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:15:17,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614370318] [2020-12-22 13:15:17,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:15:17,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:17,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:15:17,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:15:17,526 INFO L87 Difference]: Start difference. First operand 5807 states and 8155 transitions. Second operand 5 states. [2020-12-22 13:15:19,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:19,886 INFO L93 Difference]: Finished difference Result 17383 states and 24454 transitions. [2020-12-22 13:15:19,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:15:19,888 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-12-22 13:15:19,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:19,966 INFO L225 Difference]: With dead ends: 17383 [2020-12-22 13:15:19,967 INFO L226 Difference]: Without dead ends: 11586 [2020-12-22 13:15:19,990 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 13:15:20,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11586 states. [2020-12-22 13:15:20,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11586 to 11290. [2020-12-22 13:15:20,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11290 states. [2020-12-22 13:15:20,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11290 states to 11290 states and 15866 transitions. [2020-12-22 13:15:20,408 INFO L78 Accepts]: Start accepts. Automaton has 11290 states and 15866 transitions. Word has length 25 [2020-12-22 13:15:20,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:20,409 INFO L481 AbstractCegarLoop]: Abstraction has 11290 states and 15866 transitions. [2020-12-22 13:15:20,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:15:20,410 INFO L276 IsEmpty]: Start isEmpty. Operand 11290 states and 15866 transitions. [2020-12-22 13:15:20,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 13:15:20,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:20,427 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:15:20,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 13:15:20,428 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:20,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:20,431 INFO L82 PathProgramCache]: Analyzing trace with hash 555830267, now seen corresponding path program 1 times [2020-12-22 13:15:20,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:20,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479289074] [2020-12-22 13:15:20,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:20,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:15:20,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479289074] [2020-12-22 13:15:20,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:15:20,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:15:20,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681301276] [2020-12-22 13:15:20,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:15:20,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:20,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:15:20,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:15:20,882 INFO L87 Difference]: Start difference. First operand 11290 states and 15866 transitions. Second operand 4 states. [2020-12-22 13:15:22,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:22,568 INFO L93 Difference]: Finished difference Result 44194 states and 62512 transitions. [2020-12-22 13:15:22,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:15:22,569 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-12-22 13:15:22,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:22,759 INFO L225 Difference]: With dead ends: 44194 [2020-12-22 13:15:22,760 INFO L226 Difference]: Without dead ends: 32922 [2020-12-22 13:15:22,803 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 13:15:22,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32922 states. [2020-12-22 13:15:23,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32922 to 11458. [2020-12-22 13:15:23,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11458 states. [2020-12-22 13:15:23,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11458 states to 11458 states and 16034 transitions. [2020-12-22 13:15:23,780 INFO L78 Accepts]: Start accepts. Automaton has 11458 states and 16034 transitions. Word has length 66 [2020-12-22 13:15:23,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:23,781 INFO L481 AbstractCegarLoop]: Abstraction has 11458 states and 16034 transitions. [2020-12-22 13:15:23,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:15:23,781 INFO L276 IsEmpty]: Start isEmpty. Operand 11458 states and 16034 transitions. [2020-12-22 13:15:23,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 13:15:23,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:23,796 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:15:23,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 13:15:23,796 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:23,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:23,797 INFO L82 PathProgramCache]: Analyzing trace with hash -196678620, now seen corresponding path program 1 times [2020-12-22 13:15:23,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:23,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60641333] [2020-12-22 13:15:23,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:15:24,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60641333] [2020-12-22 13:15:24,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:15:24,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:15:24,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553558620] [2020-12-22 13:15:24,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:15:24,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:24,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:15:24,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:15:24,171 INFO L87 Difference]: Start difference. First operand 11458 states and 16034 transitions. Second operand 3 states. [2020-12-22 13:15:24,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:24,621 INFO L93 Difference]: Finished difference Result 22958 states and 32127 transitions. [2020-12-22 13:15:24,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:15:24,622 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-22 13:15:24,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:24,896 INFO L225 Difference]: With dead ends: 22958 [2020-12-22 13:15:24,897 INFO L226 Difference]: Without dead ends: 11518 [2020-12-22 13:15:24,919 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 13:15:24,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11518 states. [2020-12-22 13:15:25,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11518 to 11478. [2020-12-22 13:15:25,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11478 states. [2020-12-22 13:15:25,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11478 states to 11478 states and 16054 transitions. [2020-12-22 13:15:25,346 INFO L78 Accepts]: Start accepts. Automaton has 11478 states and 16054 transitions. Word has length 69 [2020-12-22 13:15:25,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:25,346 INFO L481 AbstractCegarLoop]: Abstraction has 11478 states and 16054 transitions. [2020-12-22 13:15:25,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:15:25,347 INFO L276 IsEmpty]: Start isEmpty. Operand 11478 states and 16054 transitions. [2020-12-22 13:15:25,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 13:15:25,360 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:25,360 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:15:25,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 13:15:25,361 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:25,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:25,361 INFO L82 PathProgramCache]: Analyzing trace with hash 660079663, now seen corresponding path program 1 times [2020-12-22 13:15:25,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:25,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101883514] [2020-12-22 13:15:25,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:25,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:15:25,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101883514] [2020-12-22 13:15:25,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:15:25,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:15:25,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282116635] [2020-12-22 13:15:25,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:15:25,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:25,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:15:25,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:15:25,661 INFO L87 Difference]: Start difference. First operand 11478 states and 16054 transitions. Second operand 4 states. [2020-12-22 13:15:27,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:27,352 INFO L93 Difference]: Finished difference Result 44898 states and 62958 transitions. [2020-12-22 13:15:27,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:15:27,353 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-12-22 13:15:27,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:27,485 INFO L225 Difference]: With dead ends: 44898 [2020-12-22 13:15:27,486 INFO L226 Difference]: Without dead ends: 33438 [2020-12-22 13:15:27,531 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 13:15:27,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33438 states. [2020-12-22 13:15:28,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33438 to 11510. [2020-12-22 13:15:28,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11510 states. [2020-12-22 13:15:28,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11510 states to 11510 states and 16086 transitions. [2020-12-22 13:15:28,308 INFO L78 Accepts]: Start accepts. Automaton has 11510 states and 16086 transitions. Word has length 69 [2020-12-22 13:15:28,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:28,309 INFO L481 AbstractCegarLoop]: Abstraction has 11510 states and 16086 transitions. [2020-12-22 13:15:28,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:15:28,309 INFO L276 IsEmpty]: Start isEmpty. Operand 11510 states and 16086 transitions. [2020-12-22 13:15:28,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 13:15:28,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:28,324 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:15:28,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 13:15:28,324 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:28,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:28,325 INFO L82 PathProgramCache]: Analyzing trace with hash -436548035, now seen corresponding path program 1 times [2020-12-22 13:15:28,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:28,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118900224] [2020-12-22 13:15:28,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:28,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:15:28,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118900224] [2020-12-22 13:15:28,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437329246] [2020-12-22 13:15:28,683 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 13:15:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:30,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 2690 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 13:15:30,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:15:30,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:15:30,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:15:30,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 13:15:30,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750233035] [2020-12-22 13:15:30,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:15:30,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:30,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:15:30,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:15:30,202 INFO L87 Difference]: Start difference. First operand 11510 states and 16086 transitions. Second operand 3 states. [2020-12-22 13:15:31,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:31,128 INFO L93 Difference]: Finished difference Result 31898 states and 44652 transitions. [2020-12-22 13:15:31,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:15:31,129 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 13:15:31,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:31,198 INFO L225 Difference]: With dead ends: 31898 [2020-12-22 13:15:31,199 INFO L226 Difference]: Without dead ends: 20406 [2020-12-22 13:15:31,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:15:31,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20406 states. [2020-12-22 13:15:31,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20406 to 11526. [2020-12-22 13:15:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11526 states. [2020-12-22 13:15:31,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11526 states to 11526 states and 16102 transitions. [2020-12-22 13:15:31,843 INFO L78 Accepts]: Start accepts. Automaton has 11526 states and 16102 transitions. Word has length 72 [2020-12-22 13:15:31,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:31,843 INFO L481 AbstractCegarLoop]: Abstraction has 11526 states and 16102 transitions. [2020-12-22 13:15:31,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:15:31,844 INFO L276 IsEmpty]: Start isEmpty. Operand 11526 states and 16102 transitions. [2020-12-22 13:15:31,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 13:15:31,858 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:31,859 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:15:32,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 13:15:32,073 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:32,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:32,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1725726798, now seen corresponding path program 1 times [2020-12-22 13:15:32,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:32,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326547198] [2020-12-22 13:15:32,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:32,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:15:32,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326547198] [2020-12-22 13:15:32,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448371696] [2020-12-22 13:15:32,419 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 13:15:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:33,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 2757 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 13:15:33,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:15:34,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:15:34,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:15:34,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 13:15:34,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294312145] [2020-12-22 13:15:34,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:15:34,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:34,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:15:34,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:15:34,054 INFO L87 Difference]: Start difference. First operand 11526 states and 16102 transitions. Second operand 5 states. [2020-12-22 13:15:34,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:34,897 INFO L93 Difference]: Finished difference Result 23134 states and 32303 transitions. [2020-12-22 13:15:34,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:15:34,898 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-12-22 13:15:34,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:34,940 INFO L225 Difference]: With dead ends: 23134 [2020-12-22 13:15:34,940 INFO L226 Difference]: Without dead ends: 11626 [2020-12-22 13:15:34,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:15:34,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11626 states. [2020-12-22 13:15:35,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11626 to 11586. [2020-12-22 13:15:35,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11586 states. [2020-12-22 13:15:35,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11586 states to 11586 states and 16162 transitions. [2020-12-22 13:15:35,730 INFO L78 Accepts]: Start accepts. Automaton has 11586 states and 16162 transitions. Word has length 75 [2020-12-22 13:15:35,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:35,731 INFO L481 AbstractCegarLoop]: Abstraction has 11586 states and 16162 transitions. [2020-12-22 13:15:35,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:15:35,731 INFO L276 IsEmpty]: Start isEmpty. Operand 11586 states and 16162 transitions. [2020-12-22 13:15:35,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 13:15:35,747 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:35,747 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:15:35,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:15:35,962 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:35,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:35,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1409683414, now seen corresponding path program 1 times [2020-12-22 13:15:35,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:35,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889018647] [2020-12-22 13:15:35,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:15:36,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889018647] [2020-12-22 13:15:36,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:15:36,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:15:36,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999082193] [2020-12-22 13:15:36,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:15:36,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:36,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:15:36,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:15:36,303 INFO L87 Difference]: Start difference. First operand 11586 states and 16162 transitions. Second operand 3 states. [2020-12-22 13:15:37,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:37,112 INFO L93 Difference]: Finished difference Result 31010 states and 43284 transitions. [2020-12-22 13:15:37,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:15:37,113 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 13:15:37,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:37,174 INFO L225 Difference]: With dead ends: 31010 [2020-12-22 13:15:37,174 INFO L226 Difference]: Without dead ends: 19442 [2020-12-22 13:15:37,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 13:15:37,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19442 states. [2020-12-22 13:15:38,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19442 to 12086. [2020-12-22 13:15:38,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12086 states. [2020-12-22 13:15:38,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12086 states to 12086 states and 16832 transitions. [2020-12-22 13:15:38,079 INFO L78 Accepts]: Start accepts. Automaton has 12086 states and 16832 transitions. Word has length 77 [2020-12-22 13:15:38,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:38,080 INFO L481 AbstractCegarLoop]: Abstraction has 12086 states and 16832 transitions. [2020-12-22 13:15:38,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:15:38,080 INFO L276 IsEmpty]: Start isEmpty. Operand 12086 states and 16832 transitions. [2020-12-22 13:15:38,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 13:15:38,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:38,096 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:15:38,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 13:15:38,096 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:38,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:38,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1553880309, now seen corresponding path program 2 times [2020-12-22 13:15:38,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:38,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569294891] [2020-12-22 13:15:38,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:15:38,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569294891] [2020-12-22 13:15:38,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957011077] [2020-12-22 13:15:38,732 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 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