/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 15:11:09,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 15:11:09,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 15:11:09,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 15:11:09,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 15:11:09,059 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 15:11:09,061 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 15:11:09,063 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 15:11:09,066 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 15:11:09,067 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 15:11:09,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 15:11:09,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 15:11:09,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 15:11:09,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 15:11:09,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 15:11:09,075 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 15:11:09,076 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 15:11:09,077 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 15:11:09,080 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 15:11:09,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 15:11:09,084 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 15:11:09,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 15:11:09,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 15:11:09,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 15:11:09,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 15:11:09,121 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 15:11:09,121 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 15:11:09,124 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 15:11:09,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 15:11:09,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 15:11:09,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 15:11:09,131 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 15:11:09,133 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 15:11:09,134 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 15:11:09,135 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 15:11:09,135 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 15:11:09,136 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 15:11:09,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 15:11:09,136 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 15:11:09,138 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 15:11:09,139 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 15:11:09,140 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 15:11:09,194 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 15:11:09,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 15:11:09,200 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 15:11:09,200 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 15:11:09,200 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 15:11:09,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 15:11:09,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 15:11:09,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 15:11:09,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 15:11:09,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 15:11:09,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 15:11:09,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 15:11:09,203 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 15:11:09,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 15:11:09,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 15:11:09,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 15:11:09,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 15:11:09,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 15:11:09,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 15:11:09,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 15:11:09,205 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 15:11:09,205 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 15:11:09,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 15:11:09,205 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 15:11:09,206 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 15:11:09,206 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 15:11:09,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 15:11:09,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 15:11:09,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 15:11:09,689 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 15:11:09,690 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 15:11:09,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i [2020-12-22 15:11:09,796 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3d6ec5ca/b1064479006648c9910d517d5fe5d5ea/FLAG77ffad591 [2020-12-22 15:11:10,935 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 15:11:10,936 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i [2020-12-22 15:11:10,986 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3d6ec5ca/b1064479006648c9910d517d5fe5d5ea/FLAG77ffad591 [2020-12-22 15:11:11,395 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3d6ec5ca/b1064479006648c9910d517d5fe5d5ea [2020-12-22 15:11:11,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 15:11:11,402 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 15:11:11,406 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 15:11:11,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 15:11:11,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 15:11:11,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:11:11" (1/1) ... [2020-12-22 15:11:11,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bd83cf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:11:11, skipping insertion in model container [2020-12-22 15:11:11,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:11:11" (1/1) ... [2020-12-22 15:11:11,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 15:11:11,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 15:11:13,209 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i[164687,164700] [2020-12-22 15:11:13,262 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 15:11:13,301 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 15:11:13,646 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i[164687,164700] [2020-12-22 15:11:13,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 15:11:13,985 INFO L208 MainTranslator]: Completed translation [2020-12-22 15:11:13,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:11:13 WrapperNode [2020-12-22 15:11:13,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 15:11:13,989 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 15:11:13,989 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 15:11:13,990 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 15:11:14,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:11:13" (1/1) ... [2020-12-22 15:11:14,152 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:11:13" (1/1) ... [2020-12-22 15:11:14,926 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 15:11:14,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 15:11:14,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 15:11:14,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 15:11:14,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:11:13" (1/1) ... [2020-12-22 15:11:14,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:11:13" (1/1) ... [2020-12-22 15:11:15,066 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:11:13" (1/1) ... [2020-12-22 15:11:15,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:11:13" (1/1) ... [2020-12-22 15:11:15,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:11:13" (1/1) ... [2020-12-22 15:11:15,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:11:13" (1/1) ... [2020-12-22 15:11:15,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:11:13" (1/1) ... [2020-12-22 15:11:16,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 15:11:16,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 15:11:16,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 15:11:16,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 15:11:16,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:11:13" (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 15:11:16,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 15:11:16,179 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2020-12-22 15:11:16,179 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2020-12-22 15:11:16,179 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-12-22 15:11:16,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-12-22 15:11:16,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-12-22 15:11:16,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 15:11:16,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 15:11:16,180 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2020-12-22 15:11:16,180 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2020-12-22 15:11:16,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 15:11:16,180 INFO L130 BoogieDeclarations]: Found specification of procedure rdac_bus_detach [2020-12-22 15:11:16,180 INFO L138 BoogieDeclarations]: Found implementation of procedure rdac_bus_detach [2020-12-22 15:11:16,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 15:11:16,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 15:11:16,181 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2020-12-22 15:11:16,181 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2020-12-22 15:11:16,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2020-12-22 15:11:16,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 15:11:16,182 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2020-12-22 15:11:16,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 15:11:16,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 15:11:16,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 15:11:16,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-12-22 15:11:16,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 15:11:16,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 15:11:35,922 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 15:11:35,923 INFO L299 CfgBuilder]: Removed 3524 assume(true) statements. [2020-12-22 15:11:35,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:11:35 BoogieIcfgContainer [2020-12-22 15:11:35,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 15:11:35,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 15:11:35,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 15:11:35,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 15:11:35,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:11:11" (1/3) ... [2020-12-22 15:11:35,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1136b47d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:11:35, skipping insertion in model container [2020-12-22 15:11:35,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:11:13" (2/3) ... [2020-12-22 15:11:35,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1136b47d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:11:35, skipping insertion in model container [2020-12-22 15:11:35,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:11:35" (3/3) ... [2020-12-22 15:11:35,939 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i [2020-12-22 15:11:35,946 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 15:11:35,955 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-22 15:11:35,976 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 15:11:36,025 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 15:11:36,025 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 15:11:36,026 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 15:11:36,026 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 15:11:36,026 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 15:11:36,026 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 15:11:36,026 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 15:11:36,026 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 15:11:36,092 INFO L276 IsEmpty]: Start isEmpty. Operand 3676 states. [2020-12-22 15:11:36,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 15:11:36,100 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 15:11:36,101 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] [2020-12-22 15:11:36,101 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 15:11:36,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 15:11:36,108 INFO L82 PathProgramCache]: Analyzing trace with hash -792164640, now seen corresponding path program 1 times [2020-12-22 15:11:36,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 15:11:36,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687065424] [2020-12-22 15:11:36,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 15:11:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:11:36,861 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 15:11:36,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687065424] [2020-12-22 15:11:36,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 15:11:36,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 15:11:36,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789292191] [2020-12-22 15:11:36,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 15:11:36,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 15:11:36,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 15:11:36,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 15:11:36,897 INFO L87 Difference]: Start difference. First operand 3676 states. Second operand 2 states. [2020-12-22 15:11:37,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 15:11:37,243 INFO L93 Difference]: Finished difference Result 7348 states and 10581 transitions. [2020-12-22 15:11:37,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 15:11:37,245 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-12-22 15:11:37,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 15:11:37,285 INFO L225 Difference]: With dead ends: 7348 [2020-12-22 15:11:37,286 INFO L226 Difference]: Without dead ends: 2283 [2020-12-22 15:11:37,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 15:11:37,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2020-12-22 15:11:37,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 2283. [2020-12-22 15:11:37,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2283 states. [2020-12-22 15:11:37,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3215 transitions. [2020-12-22 15:11:37,510 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3215 transitions. Word has length 30 [2020-12-22 15:11:37,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 15:11:37,510 INFO L481 AbstractCegarLoop]: Abstraction has 2283 states and 3215 transitions. [2020-12-22 15:11:37,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 15:11:37,511 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3215 transitions. [2020-12-22 15:11:37,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 15:11:37,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 15:11:37,514 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] [2020-12-22 15:11:37,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 15:11:37,515 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 15:11:37,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 15:11:37,517 INFO L82 PathProgramCache]: Analyzing trace with hash -557880348, now seen corresponding path program 1 times [2020-12-22 15:11:37,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 15:11:37,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832064052] [2020-12-22 15:11:37,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 15:11:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:11:37,797 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 15:11:37,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832064052] [2020-12-22 15:11:37,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 15:11:37,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 15:11:37,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057270727] [2020-12-22 15:11:37,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 15:11:37,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 15:11:37,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 15:11:37,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 15:11:37,802 INFO L87 Difference]: Start difference. First operand 2283 states and 3215 transitions. Second operand 3 states. [2020-12-22 15:11:38,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 15:11:38,061 INFO L93 Difference]: Finished difference Result 4923 states and 6947 transitions. [2020-12-22 15:11:38,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 15:11:38,062 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-12-22 15:11:38,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 15:11:38,083 INFO L225 Difference]: With dead ends: 4923 [2020-12-22 15:11:38,083 INFO L226 Difference]: Without dead ends: 2659 [2020-12-22 15:11:38,092 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 15:11:38,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2020-12-22 15:11:38,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2658. [2020-12-22 15:11:38,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2658 states. [2020-12-22 15:11:38,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 3750 transitions. [2020-12-22 15:11:38,183 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 3750 transitions. Word has length 30 [2020-12-22 15:11:38,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 15:11:38,184 INFO L481 AbstractCegarLoop]: Abstraction has 2658 states and 3750 transitions. [2020-12-22 15:11:38,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 15:11:38,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 3750 transitions. [2020-12-22 15:11:38,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 15:11:38,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 15:11:38,195 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] [2020-12-22 15:11:38,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 15:11:38,196 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 15:11:38,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 15:11:38,199 INFO L82 PathProgramCache]: Analyzing trace with hash 889001481, now seen corresponding path program 1 times [2020-12-22 15:11:38,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 15:11:38,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891894959] [2020-12-22 15:11:38,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 15:11:38,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:11:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 15:11:38,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891894959] [2020-12-22 15:11:38,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 15:11:38,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 15:11:38,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158722031] [2020-12-22 15:11:38,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 15:11:38,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 15:11:38,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 15:11:38,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 15:11:38,480 INFO L87 Difference]: Start difference. First operand 2658 states and 3750 transitions. Second operand 3 states. [2020-12-22 15:11:38,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 15:11:38,793 INFO L93 Difference]: Finished difference Result 2711 states and 3826 transitions. [2020-12-22 15:11:38,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 15:11:38,796 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-12-22 15:11:38,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 15:11:38,817 INFO L225 Difference]: With dead ends: 2711 [2020-12-22 15:11:38,818 INFO L226 Difference]: Without dead ends: 2707 [2020-12-22 15:11:38,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 15:11:38,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2707 states. [2020-12-22 15:11:38,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2707 to 2654. [2020-12-22 15:11:38,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2020-12-22 15:11:38,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3746 transitions. [2020-12-22 15:11:38,963 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3746 transitions. Word has length 50 [2020-12-22 15:11:38,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 15:11:38,964 INFO L481 AbstractCegarLoop]: Abstraction has 2654 states and 3746 transitions. [2020-12-22 15:11:38,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 15:11:38,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3746 transitions. [2020-12-22 15:11:38,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 15:11:38,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 15:11:38,975 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 15:11:38,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 15:11:38,976 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 15:11:38,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 15:11:38,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1521652847, now seen corresponding path program 1 times [2020-12-22 15:11:38,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 15:11:38,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228901458] [2020-12-22 15:11:38,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 15:11:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:11:39,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 15:11:39,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228901458] [2020-12-22 15:11:39,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 15:11:39,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 15:11:39,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981298396] [2020-12-22 15:11:39,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 15:11:39,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 15:11:39,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 15:11:39,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 15:11:39,451 INFO L87 Difference]: Start difference. First operand 2654 states and 3746 transitions. Second operand 7 states. [2020-12-22 15:11:41,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 15:11:41,122 INFO L93 Difference]: Finished difference Result 15298 states and 21830 transitions. [2020-12-22 15:11:41,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 15:11:41,123 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 86 [2020-12-22 15:11:41,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 15:11:41,221 INFO L225 Difference]: With dead ends: 15298 [2020-12-22 15:11:41,221 INFO L226 Difference]: Without dead ends: 12663 [2020-12-22 15:11:41,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-12-22 15:11:41,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12663 states. [2020-12-22 15:11:41,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12663 to 2661. [2020-12-22 15:11:41,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2661 states. [2020-12-22 15:11:41,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 3753 transitions. [2020-12-22 15:11:41,564 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 3753 transitions. Word has length 86 [2020-12-22 15:11:41,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 15:11:41,564 INFO L481 AbstractCegarLoop]: Abstraction has 2661 states and 3753 transitions. [2020-12-22 15:11:41,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 15:11:41,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 3753 transitions. [2020-12-22 15:11:41,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-22 15:11:41,578 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 15:11:41,580 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, 1, 1, 1, 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 15:11:41,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 15:11:41,581 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 15:11:41,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 15:11:41,582 INFO L82 PathProgramCache]: Analyzing trace with hash 460602907, now seen corresponding path program 1 times [2020-12-22 15:11:41,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 15:11:41,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929422371] [2020-12-22 15:11:41,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 15:11:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:11:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 15:11:41,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929422371] [2020-12-22 15:11:41,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 15:11:41,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 15:11:41,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331766695] [2020-12-22 15:11:41,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 15:11:41,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 15:11:41,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 15:11:41,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 15:11:41,983 INFO L87 Difference]: Start difference. First operand 2661 states and 3753 transitions. Second operand 3 states. [2020-12-22 15:11:42,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 15:11:42,196 INFO L93 Difference]: Finished difference Result 5304 states and 7488 transitions. [2020-12-22 15:11:42,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 15:11:42,197 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 104 [2020-12-22 15:11:42,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 15:11:42,223 INFO L225 Difference]: With dead ends: 5304 [2020-12-22 15:11:42,224 INFO L226 Difference]: Without dead ends: 2662 [2020-12-22 15:11:42,234 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 15:11:42,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2020-12-22 15:11:42,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 2662. [2020-12-22 15:11:42,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2662 states. [2020-12-22 15:11:42,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 3754 transitions. [2020-12-22 15:11:42,424 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 3754 transitions. Word has length 104 [2020-12-22 15:11:42,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 15:11:42,425 INFO L481 AbstractCegarLoop]: Abstraction has 2662 states and 3754 transitions. [2020-12-22 15:11:42,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 15:11:42,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 3754 transitions. [2020-12-22 15:11:42,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-22 15:11:42,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 15:11:42,443 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, 1, 1, 1, 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 15:11:42,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 15:11:42,443 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 15:11:42,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 15:11:42,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1846806301, now seen corresponding path program 1 times [2020-12-22 15:11:42,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 15:11:42,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405607498] [2020-12-22 15:11:42,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 15:11:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:11:42,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 15:11:42,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405607498] [2020-12-22 15:11:42,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 15:11:42,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 15:11:42,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443987264] [2020-12-22 15:11:42,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 15:11:42,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 15:11:42,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 15:11:42,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 15:11:42,778 INFO L87 Difference]: Start difference. First operand 2662 states and 3754 transitions. Second operand 3 states. [2020-12-22 15:11:42,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 15:11:42,984 INFO L93 Difference]: Finished difference Result 5307 states and 7491 transitions. [2020-12-22 15:11:42,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 15:11:42,988 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 104 [2020-12-22 15:11:42,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 15:11:43,012 INFO L225 Difference]: With dead ends: 5307 [2020-12-22 15:11:43,013 INFO L226 Difference]: Without dead ends: 2664 [2020-12-22 15:11:43,031 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 15:11:43,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2020-12-22 15:11:43,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2663. [2020-12-22 15:11:43,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2663 states. [2020-12-22 15:11:43,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3755 transitions. [2020-12-22 15:11:43,193 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3755 transitions. Word has length 104 [2020-12-22 15:11:43,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 15:11:43,194 INFO L481 AbstractCegarLoop]: Abstraction has 2663 states and 3755 transitions. [2020-12-22 15:11:43,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 15:11:43,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3755 transitions. [2020-12-22 15:11:43,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 15:11:43,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 15:11:43,205 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, 1, 1, 1, 1, 1, 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 15:11:43,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 15:11:43,205 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 15:11:43,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 15:11:43,206 INFO L82 PathProgramCache]: Analyzing trace with hash -915727423, now seen corresponding path program 1 times [2020-12-22 15:11:43,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 15:11:43,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424070864] [2020-12-22 15:11:43,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 15:11:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:11:43,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 15:11:43,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424070864] [2020-12-22 15:11:43,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 15:11:43,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 15:11:43,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238635501] [2020-12-22 15:11:43,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 15:11:43,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 15:11:43,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 15:11:43,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 15:11:43,533 INFO L87 Difference]: Start difference. First operand 2663 states and 3755 transitions. Second operand 5 states. [2020-12-22 15:11:44,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 15:11:44,255 INFO L93 Difference]: Finished difference Result 8231 states and 11659 transitions. [2020-12-22 15:11:44,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 15:11:44,256 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2020-12-22 15:11:44,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 15:11:44,287 INFO L225 Difference]: With dead ends: 8231 [2020-12-22 15:11:44,287 INFO L226 Difference]: Without dead ends: 5587 [2020-12-22 15:11:44,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 15:11:44,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5587 states. [2020-12-22 15:11:44,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5587 to 2667. [2020-12-22 15:11:44,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2667 states. [2020-12-22 15:11:44,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2667 states to 2667 states and 3759 transitions. [2020-12-22 15:11:44,473 INFO L78 Accepts]: Start accepts. Automaton has 2667 states and 3759 transitions. Word has length 106 [2020-12-22 15:11:44,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 15:11:44,473 INFO L481 AbstractCegarLoop]: Abstraction has 2667 states and 3759 transitions. [2020-12-22 15:11:44,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 15:11:44,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2667 states and 3759 transitions. [2020-12-22 15:11:44,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 15:11:44,483 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 15:11:44,483 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:11:44,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 15:11:44,484 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 15:11:44,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 15:11:44,484 INFO L82 PathProgramCache]: Analyzing trace with hash 451314063, now seen corresponding path program 1 times [2020-12-22 15:11:44,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 15:11:44,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330631333] [2020-12-22 15:11:44,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 15:11:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:11:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 15:11:44,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330631333] [2020-12-22 15:11:44,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 15:11:44,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 15:11:44,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786446496] [2020-12-22 15:11:44,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 15:11:44,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 15:11:44,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 15:11:44,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 15:11:44,926 INFO L87 Difference]: Start difference. First operand 2667 states and 3759 transitions. Second operand 4 states. [2020-12-22 15:11:45,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 15:11:45,124 INFO L93 Difference]: Finished difference Result 5325 states and 7513 transitions. [2020-12-22 15:11:45,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 15:11:45,125 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2020-12-22 15:11:45,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 15:11:45,138 INFO L225 Difference]: With dead ends: 5325 [2020-12-22 15:11:45,139 INFO L226 Difference]: Without dead ends: 2677 [2020-12-22 15:11:45,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 15:11:45,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2020-12-22 15:11:45,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 2669. [2020-12-22 15:11:45,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2669 states. [2020-12-22 15:11:45,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2669 states to 2669 states and 3761 transitions. [2020-12-22 15:11:45,292 INFO L78 Accepts]: Start accepts. Automaton has 2669 states and 3761 transitions. Word has length 111 [2020-12-22 15:11:45,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 15:11:45,293 INFO L481 AbstractCegarLoop]: Abstraction has 2669 states and 3761 transitions. [2020-12-22 15:11:45,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 15:11:45,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2669 states and 3761 transitions. [2020-12-22 15:11:45,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 15:11:45,303 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 15:11:45,303 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:11:45,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 15:11:45,304 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 15:11:45,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 15:11:45,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1480673361, now seen corresponding path program 1 times [2020-12-22 15:11:45,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 15:11:45,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074811182] [2020-12-22 15:11:45,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 15:11:45,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:11:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 15:11:45,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074811182] [2020-12-22 15:11:45,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 15:11:45,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 15:11:45,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330799] [2020-12-22 15:11:45,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 15:11:45,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 15:11:45,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 15:11:45,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 15:11:45,556 INFO L87 Difference]: Start difference. First operand 2669 states and 3761 transitions. Second operand 4 states. [2020-12-22 15:11:45,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 15:11:45,744 INFO L93 Difference]: Finished difference Result 5322 states and 7506 transitions. [2020-12-22 15:11:45,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 15:11:45,746 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2020-12-22 15:11:45,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 15:11:45,758 INFO L225 Difference]: With dead ends: 5322 [2020-12-22 15:11:45,759 INFO L226 Difference]: Without dead ends: 2672 [2020-12-22 15:11:45,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 15:11:45,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2020-12-22 15:11:45,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2671. [2020-12-22 15:11:45,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2671 states. [2020-12-22 15:11:45,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2671 states to 2671 states and 3763 transitions. [2020-12-22 15:11:45,926 INFO L78 Accepts]: Start accepts. Automaton has 2671 states and 3763 transitions. Word has length 111 [2020-12-22 15:11:45,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 15:11:45,927 INFO L481 AbstractCegarLoop]: Abstraction has 2671 states and 3763 transitions. [2020-12-22 15:11:45,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 15:11:45,927 INFO L276 IsEmpty]: Start isEmpty. Operand 2671 states and 3763 transitions. [2020-12-22 15:11:45,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 15:11:45,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 15:11:45,938 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:11:45,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 15:11:45,942 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 15:11:45,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 15:11:45,943 INFO L82 PathProgramCache]: Analyzing trace with hash -920493235, now seen corresponding path program 1 times [2020-12-22 15:11:45,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 15:11:45,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201702266] [2020-12-22 15:11:45,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 15:11:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:11:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 15:11:46,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201702266] [2020-12-22 15:11:46,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 15:11:46,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 15:11:46,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625904558] [2020-12-22 15:11:46,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 15:11:46,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 15:11:46,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 15:11:46,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 15:11:46,440 INFO L87 Difference]: Start difference. First operand 2671 states and 3763 transitions. Second operand 3 states. [2020-12-22 15:11:46,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 15:11:46,807 INFO L93 Difference]: Finished difference Result 5336 states and 7532 transitions. [2020-12-22 15:11:46,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 15:11:46,808 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2020-12-22 15:11:46,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 15:11:46,822 INFO L225 Difference]: With dead ends: 5336 [2020-12-22 15:11:46,822 INFO L226 Difference]: Without dead ends: 2684 [2020-12-22 15:11:46,832 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 15:11:46,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2684 states. [2020-12-22 15:11:46,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2684 to 2684. [2020-12-22 15:11:46,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2684 states. [2020-12-22 15:11:46,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2684 states to 2684 states and 3776 transitions. [2020-12-22 15:11:46,977 INFO L78 Accepts]: Start accepts. Automaton has 2684 states and 3776 transitions. Word has length 111 [2020-12-22 15:11:46,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 15:11:46,977 INFO L481 AbstractCegarLoop]: Abstraction has 2684 states and 3776 transitions. [2020-12-22 15:11:46,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 15:11:46,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2684 states and 3776 transitions. [2020-12-22 15:11:46,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 15:11:46,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 15:11:46,989 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:11:46,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 15:11:46,992 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 15:11:46,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 15:11:46,992 INFO L82 PathProgramCache]: Analyzing trace with hash -621044477, now seen corresponding path program 1 times [2020-12-22 15:11:46,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 15:11:46,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093308629] [2020-12-22 15:11:46,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 15:11:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:11:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 15:11:47,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093308629] [2020-12-22 15:11:47,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941192016] [2020-12-22 15:11:47,437 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 15:11:48,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:11:48,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 2446 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 15:11:48,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 15:11:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 15:11:48,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 15:11:48,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-22 15:11:48,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490759052] [2020-12-22 15:11:48,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 15:11:48,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 15:11:48,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 15:11:48,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 15:11:48,996 INFO L87 Difference]: Start difference. First operand 2684 states and 3776 transitions. Second operand 6 states. [2020-12-22 15:11:49,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 15:11:49,600 INFO L93 Difference]: Finished difference Result 5394 states and 7622 transitions. [2020-12-22 15:11:49,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 15:11:49,601 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2020-12-22 15:11:49,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 15:11:49,615 INFO L225 Difference]: With dead ends: 5394 [2020-12-22 15:11:49,616 INFO L226 Difference]: Without dead ends: 2729 [2020-12-22 15:11:49,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 15:11:49,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2020-12-22 15:11:49,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2729. [2020-12-22 15:11:49,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2729 states. [2020-12-22 15:11:49,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2729 states to 2729 states and 3821 transitions. [2020-12-22 15:11:49,797 INFO L78 Accepts]: Start accepts. Automaton has 2729 states and 3821 transitions. Word has length 113 [2020-12-22 15:11:49,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 15:11:49,798 INFO L481 AbstractCegarLoop]: Abstraction has 2729 states and 3821 transitions. [2020-12-22 15:11:49,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 15:11:49,798 INFO L276 IsEmpty]: Start isEmpty. Operand 2729 states and 3821 transitions. [2020-12-22 15:11:49,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 15:11:49,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 15:11:49,809 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:11:50,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-22 15:11:50,024 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 15:11:50,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 15:11:50,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1109896179, now seen corresponding path program 2 times [2020-12-22 15:11:50,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 15:11:50,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384927602] [2020-12-22 15:11:50,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 15:11:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:11:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 15:11:50,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384927602] [2020-12-22 15:11:50,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150365030] [2020-12-22 15:11:50,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 15:11:51,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 15:11:51,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 15:11:51,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 2305 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 15:11:51,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 15:11:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 15:11:51,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 15:11:51,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-12-22 15:11:51,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419090824] [2020-12-22 15:11:51,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 15:11:51,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 15:11:51,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 15:11:51,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 15:11:51,993 INFO L87 Difference]: Start difference. First operand 2729 states and 3821 transitions. Second operand 3 states. [2020-12-22 15:11:52,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 15:11:52,345 INFO L93 Difference]: Finished difference Result 5440 states and 7624 transitions. [2020-12-22 15:11:52,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 15:11:52,346 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 115 [2020-12-22 15:11:52,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 15:11:52,358 INFO L225 Difference]: With dead ends: 5440 [2020-12-22 15:11:52,359 INFO L226 Difference]: Without dead ends: 2730 [2020-12-22 15:11:52,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 15:11:52,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2730 states. [2020-12-22 15:11:52,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2730 to 2730. [2020-12-22 15:11:52,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2730 states. [2020-12-22 15:11:52,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2730 states to 2730 states and 3822 transitions. [2020-12-22 15:11:52,515 INFO L78 Accepts]: Start accepts. Automaton has 2730 states and 3822 transitions. Word has length 115 [2020-12-22 15:11:52,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 15:11:52,516 INFO L481 AbstractCegarLoop]: Abstraction has 2730 states and 3822 transitions. [2020-12-22 15:11:52,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 15:11:52,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2730 states and 3822 transitions. [2020-12-22 15:11:52,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 15:11:52,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 15:11:52,527 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:11:52,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 15:11:52,743 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 15:11:52,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 15:11:52,744 INFO L82 PathProgramCache]: Analyzing trace with hash 779637862, now seen corresponding path program 1 times [2020-12-22 15:11:52,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 15:11:52,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888773170] [2020-12-22 15:11:52,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 15:11:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:11:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 15:11:53,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888773170] [2020-12-22 15:11:53,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917644766] [2020-12-22 15:11:53,284 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 15:11:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:11:54,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 2464 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 15:11:54,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 15:11:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 15:11:54,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 15:11:54,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-22 15:11:54,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463847326] [2020-12-22 15:11:54,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 15:11:54,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 15:11:54,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 15:11:54,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 15:11:54,541 INFO L87 Difference]: Start difference. First operand 2730 states and 3822 transitions. Second operand 8 states. [2020-12-22 15:11:55,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 15:11:55,250 INFO L93 Difference]: Finished difference Result 5470 states and 7682 transitions. [2020-12-22 15:11:55,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 15:11:55,251 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 116 [2020-12-22 15:11:55,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 15:11:55,264 INFO L225 Difference]: With dead ends: 5470 [2020-12-22 15:11:55,264 INFO L226 Difference]: Without dead ends: 2759 [2020-12-22 15:11:55,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 15:11:55,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2759 states. [2020-12-22 15:11:55,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2759 to 2759. [2020-12-22 15:11:55,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2759 states. [2020-12-22 15:11:55,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2759 states to 2759 states and 3851 transitions. [2020-12-22 15:11:55,436 INFO L78 Accepts]: Start accepts. Automaton has 2759 states and 3851 transitions. Word has length 116 [2020-12-22 15:11:55,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 15:11:55,436 INFO L481 AbstractCegarLoop]: Abstraction has 2759 states and 3851 transitions. [2020-12-22 15:11:55,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 15:11:55,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2759 states and 3851 transitions. [2020-12-22 15:11:55,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 15:11:55,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 15:11:55,448 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 15:11:55,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 15:11:55,662 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 15:11:55,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 15:11:55,662 INFO L82 PathProgramCache]: Analyzing trace with hash -155725606, now seen corresponding path program 2 times [2020-12-22 15:11:55,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 15:11:55,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473748829] [2020-12-22 15:11:55,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 15:11:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:11:55,986 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 15:11:55,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473748829] [2020-12-22 15:11:55,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282384872] [2020-12-22 15:11:55,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 15:12:11,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 15:12:11,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 15:12:11,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 2305 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 15:12:11,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 15:12:11,491 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 15:12:11,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 15:12:11,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2020-12-22 15:12:11,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732719617] [2020-12-22 15:12:11,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 15:12:11,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 15:12:11,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 15:12:11,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 15:12:11,493 INFO L87 Difference]: Start difference. First operand 2759 states and 3851 transitions. Second operand 5 states. [2020-12-22 15:12:13,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 15:12:13,020 INFO L93 Difference]: Finished difference Result 12339 states and 17332 transitions. [2020-12-22 15:12:13,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 15:12:13,021 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2020-12-22 15:12:13,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 15:12:13,065 INFO L225 Difference]: With dead ends: 12339 [2020-12-22 15:12:13,065 INFO L226 Difference]: Without dead ends: 9599 [2020-12-22 15:12:13,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-12-22 15:12:13,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9599 states. [2020-12-22 15:12:13,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9599 to 2762. [2020-12-22 15:12:13,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2762 states. [2020-12-22 15:12:13,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2762 states to 2762 states and 3854 transitions. [2020-12-22 15:12:13,348 INFO L78 Accepts]: Start accepts. Automaton has 2762 states and 3854 transitions. Word has length 118 [2020-12-22 15:12:13,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 15:12:13,349 INFO L481 AbstractCegarLoop]: Abstraction has 2762 states and 3854 transitions. [2020-12-22 15:12:13,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 15:12:13,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2762 states and 3854 transitions. [2020-12-22 15:12:13,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 15:12:13,361 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 15:12:13,361 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 15:12:13,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 15:12:13,576 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 15:12:13,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 15:12:13,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1121942990, now seen corresponding path program 1 times [2020-12-22 15:12:13,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 15:12:13,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012188936] [2020-12-22 15:12:13,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 15:12:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:12:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 15:12:13,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012188936] [2020-12-22 15:12:13,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644953359] [2020-12-22 15:12:13,958 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 15:12:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:12:15,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 2527 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 15:12:15,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 15:12:15,454 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 15:12:15,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 15:12:15,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-22 15:12:15,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866909387] [2020-12-22 15:12:15,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 15:12:15,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 15:12:15,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 15:12:15,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 15:12:15,458 INFO L87 Difference]: Start difference. First operand 2762 states and 3854 transitions. Second operand 10 states. [2020-12-22 15:12:16,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 15:12:16,352 INFO L93 Difference]: Finished difference Result 5534 states and 7746 transitions. [2020-12-22 15:12:16,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 15:12:16,353 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-12-22 15:12:16,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 15:12:16,365 INFO L225 Difference]: With dead ends: 5534 [2020-12-22 15:12:16,365 INFO L226 Difference]: Without dead ends: 2791 [2020-12-22 15:12:16,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 15:12:16,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2020-12-22 15:12:16,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2791. [2020-12-22 15:12:16,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2791 states. [2020-12-22 15:12:16,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 3883 transitions. [2020-12-22 15:12:16,578 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 3883 transitions. Word has length 124 [2020-12-22 15:12:16,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 15:12:16,579 INFO L481 AbstractCegarLoop]: Abstraction has 2791 states and 3883 transitions. [2020-12-22 15:12:16,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 15:12:16,579 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 3883 transitions. [2020-12-22 15:12:16,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-22 15:12:16,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 15:12:16,591 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-12-22 15:12:16,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 15:12:16,807 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 15:12:16,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 15:12:16,808 INFO L82 PathProgramCache]: Analyzing trace with hash 2046764094, now seen corresponding path program 2 times [2020-12-22 15:12:16,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 15:12:16,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699993451] [2020-12-22 15:12:16,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 15:12:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:12:17,184 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 15:12:17,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699993451] [2020-12-22 15:12:17,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834230557] [2020-12-22 15:12:17,185 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 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 15:12:28,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 15:12:28,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 15:12:28,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 2356 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 15:12:28,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 15:12:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 15:12:28,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 15:12:28,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2020-12-22 15:12:28,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8183562] [2020-12-22 15:12:28,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 15:12:28,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 15:12:28,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 15:12:28,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 15:12:28,878 INFO L87 Difference]: Start difference. First operand 2791 states and 3883 transitions. Second operand 4 states. [2020-12-22 15:12:30,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 15:12:30,070 INFO L93 Difference]: Finished difference Result 8215 states and 11475 transitions. [2020-12-22 15:12:30,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 15:12:30,070 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2020-12-22 15:12:30,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 15:12:30,093 INFO L225 Difference]: With dead ends: 8215 [2020-12-22 15:12:30,093 INFO L226 Difference]: Without dead ends: 5443 [2020-12-22 15:12:30,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-22 15:12:30,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5443 states. [2020-12-22 15:12:30,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5443 to 2801. [2020-12-22 15:12:30,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2801 states. [2020-12-22 15:12:30,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2801 states to 2801 states and 3893 transitions. [2020-12-22 15:12:30,330 INFO L78 Accepts]: Start accepts. Automaton has 2801 states and 3893 transitions. Word has length 126 [2020-12-22 15:12:30,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 15:12:30,330 INFO L481 AbstractCegarLoop]: Abstraction has 2801 states and 3893 transitions. [2020-12-22 15:12:30,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 15:12:30,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2801 states and 3893 transitions. [2020-12-22 15:12:30,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 15:12:30,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 15:12:30,341 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-12-22 15:12:30,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 15:12:30,557 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 15:12:30,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 15:12:30,558 INFO L82 PathProgramCache]: Analyzing trace with hash 96773182, now seen corresponding path program 1 times [2020-12-22 15:12:30,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 15:12:30,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706917410] [2020-12-22 15:12:30,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 15:12:30,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:12:30,938 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 15:12:30,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706917410] [2020-12-22 15:12:30,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234571257] [2020-12-22 15:12:30,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 15:12:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:12:32,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 2575 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 15:12:32,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 15:12:32,365 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 15:12:32,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 15:12:32,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-22 15:12:32,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984806470] [2020-12-22 15:12:32,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 15:12:32,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 15:12:32,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 15:12:32,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-12-22 15:12:32,368 INFO L87 Difference]: Start difference. First operand 2801 states and 3893 transitions. Second operand 12 states. [2020-12-22 15:12:33,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 15:12:33,232 INFO L93 Difference]: Finished difference Result 5612 states and 7824 transitions. [2020-12-22 15:12:33,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 15:12:33,233 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 130 [2020-12-22 15:12:33,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 15:12:33,245 INFO L225 Difference]: With dead ends: 5612 [2020-12-22 15:12:33,245 INFO L226 Difference]: Without dead ends: 2830 [2020-12-22 15:12:33,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-12-22 15:12:33,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2830 states. [2020-12-22 15:12:33,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2830 to 2830. [2020-12-22 15:12:33,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2830 states. [2020-12-22 15:12:33,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2830 states to 2830 states and 3922 transitions. [2020-12-22 15:12:33,519 INFO L78 Accepts]: Start accepts. Automaton has 2830 states and 3922 transitions. Word has length 130 [2020-12-22 15:12:33,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 15:12:33,519 INFO L481 AbstractCegarLoop]: Abstraction has 2830 states and 3922 transitions. [2020-12-22 15:12:33,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 15:12:33,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2830 states and 3922 transitions. [2020-12-22 15:12:33,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 15:12:33,534 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 15:12:33,534 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-12-22 15:12:33,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 15:12:33,741 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 15:12:33,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 15:12:33,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1930986374, now seen corresponding path program 2 times [2020-12-22 15:12:33,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 15:12:33,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473712312] [2020-12-22 15:12:33,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 15:12:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:12:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 15:12:34,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473712312] [2020-12-22 15:12:34,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392373645] [2020-12-22 15:12:34,125 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 15:12:45,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 15:12:45,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 15:12:45,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 2392 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 15:12:45,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 15:12:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-22 15:12:45,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 15:12:45,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2020-12-22 15:12:45,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288529938] [2020-12-22 15:12:45,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 15:12:45,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 15:12:45,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 15:12:45,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-22 15:12:45,848 INFO L87 Difference]: Start difference. First operand 2830 states and 3922 transitions. Second operand 3 states. [2020-12-22 15:12:46,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 15:12:46,129 INFO L93 Difference]: Finished difference Result 6024 states and 8334 transitions. [2020-12-22 15:12:46,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 15:12:46,129 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-12-22 15:12:46,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 15:12:46,141 INFO L225 Difference]: With dead ends: 6024 [2020-12-22 15:12:46,141 INFO L226 Difference]: Without dead ends: 3213 [2020-12-22 15:12:46,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-22 15:12:46,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3213 states. [2020-12-22 15:12:46,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3213 to 2830. [2020-12-22 15:12:46,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2830 states. [2020-12-22 15:12:46,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2830 states to 2830 states and 3921 transitions. [2020-12-22 15:12:46,364 INFO L78 Accepts]: Start accepts. Automaton has 2830 states and 3921 transitions. Word has length 132 [2020-12-22 15:12:46,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 15:12:46,364 INFO L481 AbstractCegarLoop]: Abstraction has 2830 states and 3921 transitions. [2020-12-22 15:12:46,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 15:12:46,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2830 states and 3921 transitions. [2020-12-22 15:12:46,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 15:12:46,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 15:12:46,374 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-12-22 15:12:46,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 15:12:46,588 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 15:12:46,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 15:12:46,589 INFO L82 PathProgramCache]: Analyzing trace with hash 2068449918, now seen corresponding path program 1 times [2020-12-22 15:12:46,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 15:12:46,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341055966] [2020-12-22 15:12:46,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 15:12:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:12:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 15:12:46,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341055966] [2020-12-22 15:12:46,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637180394] [2020-12-22 15:12:46,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 15:12:48,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:12:48,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 2626 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 15:12:48,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 15:12:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 15:12:48,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 15:12:48,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-22 15:12:48,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855698920] [2020-12-22 15:12:48,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 15:12:48,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 15:12:48,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 15:12:48,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2020-12-22 15:12:48,383 INFO L87 Difference]: Start difference. First operand 2830 states and 3921 transitions. Second operand 14 states. [2020-12-22 15:12:49,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 15:12:49,249 INFO L93 Difference]: Finished difference Result 5670 states and 7880 transitions. [2020-12-22 15:12:49,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 15:12:49,249 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 134 [2020-12-22 15:12:49,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 15:12:49,262 INFO L225 Difference]: With dead ends: 5670 [2020-12-22 15:12:49,263 INFO L226 Difference]: Without dead ends: 2859 [2020-12-22 15:12:49,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2020-12-22 15:12:49,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2020-12-22 15:12:49,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2859. [2020-12-22 15:12:49,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2859 states. [2020-12-22 15:12:49,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2859 states to 2859 states and 3950 transitions. [2020-12-22 15:12:49,501 INFO L78 Accepts]: Start accepts. Automaton has 2859 states and 3950 transitions. Word has length 134 [2020-12-22 15:12:49,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 15:12:49,501 INFO L481 AbstractCegarLoop]: Abstraction has 2859 states and 3950 transitions. [2020-12-22 15:12:49,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 15:12:49,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2859 states and 3950 transitions. [2020-12-22 15:12:49,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 15:12:49,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 15:12:49,513 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-12-22 15:12:49,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 15:12:49,728 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 15:12:49,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 15:12:49,729 INFO L82 PathProgramCache]: Analyzing trace with hash 170791106, now seen corresponding path program 2 times [2020-12-22 15:12:49,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 15:12:49,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936375912] [2020-12-22 15:12:49,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 15:12:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:12:50,140 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 15:12:50,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936375912] [2020-12-22 15:12:50,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45004150] [2020-12-22 15:12:50,141 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 15:13:06,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 15:13:06,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 15:13:06,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 2431 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 15:13:06,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 15:13:06,564 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 15:13:06,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 15:13:06,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2020-12-22 15:13:06,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409356501] [2020-12-22 15:13:06,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 15:13:06,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 15:13:06,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 15:13:06,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-12-22 15:13:06,567 INFO L87 Difference]: Start difference. First operand 2859 states and 3950 transitions. Second operand 3 states. [2020-12-22 15:13:06,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 15:13:06,860 INFO L93 Difference]: Finished difference Result 6098 states and 8406 transitions. [2020-12-22 15:13:06,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 15:13:06,860 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2020-12-22 15:13:06,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 15:13:06,868 INFO L225 Difference]: With dead ends: 6098 [2020-12-22 15:13:06,868 INFO L226 Difference]: Without dead ends: 3258 [2020-12-22 15:13:06,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-12-22 15:13:06,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3258 states. [2020-12-22 15:13:07,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3258 to 2859. [2020-12-22 15:13:07,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2859 states. [2020-12-22 15:13:07,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2859 states to 2859 states and 3949 transitions. [2020-12-22 15:13:07,109 INFO L78 Accepts]: Start accepts. Automaton has 2859 states and 3949 transitions. Word has length 136 [2020-12-22 15:13:07,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 15:13:07,110 INFO L481 AbstractCegarLoop]: Abstraction has 2859 states and 3949 transitions. [2020-12-22 15:13:07,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 15:13:07,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2859 states and 3949 transitions. [2020-12-22 15:13:07,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 15:13:07,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 15:13:07,117 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-12-22 15:13:07,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 15:13:07,331 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 15:13:07,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 15:13:07,332 INFO L82 PathProgramCache]: Analyzing trace with hash -2034918210, now seen corresponding path program 1 times [2020-12-22 15:13:07,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 15:13:07,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311110309] [2020-12-22 15:13:07,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 15:13:07,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:13:07,758 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 15:13:07,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311110309] [2020-12-22 15:13:07,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229691214] [2020-12-22 15:13:07,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 15:13:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:13:08,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 2677 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 15:13:08,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 15:13:09,336 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 15:13:09,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 15:13:09,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 15:13:09,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401225835] [2020-12-22 15:13:09,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 15:13:09,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 15:13:09,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 15:13:09,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2020-12-22 15:13:09,339 INFO L87 Difference]: Start difference. First operand 2859 states and 3949 transitions. Second operand 16 states. [2020-12-22 15:13:10,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 15:13:10,442 INFO L93 Difference]: Finished difference Result 5728 states and 7936 transitions. [2020-12-22 15:13:10,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 15:13:10,442 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 138 [2020-12-22 15:13:10,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 15:13:10,449 INFO L225 Difference]: With dead ends: 5728 [2020-12-22 15:13:10,449 INFO L226 Difference]: Without dead ends: 2888 [2020-12-22 15:13:10,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2020-12-22 15:13:10,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2020-12-22 15:13:10,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2888. [2020-12-22 15:13:10,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2888 states. [2020-12-22 15:13:10,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2888 states to 2888 states and 3978 transitions. [2020-12-22 15:13:10,747 INFO L78 Accepts]: Start accepts. Automaton has 2888 states and 3978 transitions. Word has length 138 [2020-12-22 15:13:10,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 15:13:10,748 INFO L481 AbstractCegarLoop]: Abstraction has 2888 states and 3978 transitions. [2020-12-22 15:13:10,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 15:13:10,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2888 states and 3978 transitions. [2020-12-22 15:13:10,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-22 15:13:10,755 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 15:13:10,756 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 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] [2020-12-22 15:13:10,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 15:13:10,968 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 15:13:10,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 15:13:10,970 INFO L82 PathProgramCache]: Analyzing trace with hash -465251710, now seen corresponding path program 2 times [2020-12-22 15:13:10,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 15:13:10,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167023098] [2020-12-22 15:13:10,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 15:13:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:13:11,384 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-22 15:13:11,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167023098] [2020-12-22 15:13:11,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259215075] [2020-12-22 15:13:11,385 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 15:13:20,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 15:13:20,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 15:13:20,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 2470 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 15:13:20,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 15:13:21,008 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-12-22 15:13:21,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 15:13:21,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2020-12-22 15:13:21,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448440618] [2020-12-22 15:13:21,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 15:13:21,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 15:13:21,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 15:13:21,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-12-22 15:13:21,010 INFO L87 Difference]: Start difference. First operand 2888 states and 3978 transitions. Second operand 7 states. [2020-12-22 15:13:24,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 15:13:24,272 INFO L93 Difference]: Finished difference Result 13184 states and 17987 transitions. [2020-12-22 15:13:24,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 15:13:24,280 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 140 [2020-12-22 15:13:24,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 15:13:24,313 INFO L225 Difference]: With dead ends: 13184 [2020-12-22 15:13:24,313 INFO L226 Difference]: Without dead ends: 10315 [2020-12-22 15:13:24,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2020-12-22 15:13:24,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10315 states. [2020-12-22 15:13:24,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10315 to 2933. [2020-12-22 15:13:24,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2933 states. [2020-12-22 15:13:24,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 4036 transitions. [2020-12-22 15:13:24,650 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 4036 transitions. Word has length 140 [2020-12-22 15:13:24,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 15:13:24,650 INFO L481 AbstractCegarLoop]: Abstraction has 2933 states and 4036 transitions. [2020-12-22 15:13:24,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 15:13:24,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 4036 transitions. [2020-12-22 15:13:24,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-22 15:13:24,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 15:13:24,657 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 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] [2020-12-22 15:13:24,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 15:13:24,866 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 15:13:24,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 15:13:24,867 INFO L82 PathProgramCache]: Analyzing trace with hash 800799794, now seen corresponding path program 1 times [2020-12-22 15:13:24,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 15:13:24,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287052350] [2020-12-22 15:13:24,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 15:13:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:13:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-22 15:13:25,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287052350] [2020-12-22 15:13:25,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417137342] [2020-12-22 15:13:25,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 15:13:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:13:26,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 2791 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 15:13:26,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 15:13:27,021 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-22 15:13:27,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 15:13:27,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-12-22 15:13:27,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726845158] [2020-12-22 15:13:27,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 15:13:27,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 15:13:27,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 15:13:27,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-12-22 15:13:27,023 INFO L87 Difference]: Start difference. First operand 2933 states and 4036 transitions. Second operand 18 states. [2020-12-22 15:13:28,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 15:13:28,250 INFO L93 Difference]: Finished difference Result 5876 states and 8110 transitions. [2020-12-22 15:13:28,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 15:13:28,251 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 152 [2020-12-22 15:13:28,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 15:13:28,259 INFO L225 Difference]: With dead ends: 5876 [2020-12-22 15:13:28,259 INFO L226 Difference]: Without dead ends: 2962 [2020-12-22 15:13:28,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-12-22 15:13:28,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2962 states. [2020-12-22 15:13:28,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2962 to 2962. [2020-12-22 15:13:28,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2962 states. [2020-12-22 15:13:28,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 4065 transitions. [2020-12-22 15:13:28,513 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 4065 transitions. Word has length 152 [2020-12-22 15:13:28,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 15:13:28,514 INFO L481 AbstractCegarLoop]: Abstraction has 2962 states and 4065 transitions. [2020-12-22 15:13:28,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 15:13:28,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 4065 transitions. [2020-12-22 15:13:28,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-22 15:13:28,521 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 15:13:28,521 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 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] [2020-12-22 15:13:28,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 15:13:28,735 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 15:13:28,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 15:13:28,736 INFO L82 PathProgramCache]: Analyzing trace with hash -2120759362, now seen corresponding path program 2 times [2020-12-22 15:13:28,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 15:13:28,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908632830] [2020-12-22 15:13:28,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 15:13:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:13:29,228 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-22 15:13:29,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908632830] [2020-12-22 15:13:29,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179507686] [2020-12-22 15:13:29,229 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 15:13:42,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 15:13:42,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 15:13:42,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 2572 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 15:13:42,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 15:13:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-22 15:13:42,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 15:13:42,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2020-12-22 15:13:42,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379222254] [2020-12-22 15:13:42,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 15:13:42,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 15:13:42,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 15:13:42,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2020-12-22 15:13:42,375 INFO L87 Difference]: Start difference. First operand 2962 states and 4065 transitions. Second operand 3 states. [2020-12-22 15:13:42,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 15:13:42,812 INFO L93 Difference]: Finished difference Result 5909 states and 8115 transitions. [2020-12-22 15:13:42,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 15:13:42,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 154 [2020-12-22 15:13:42,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 15:13:42,818 INFO L225 Difference]: With dead ends: 5909 [2020-12-22 15:13:42,819 INFO L226 Difference]: Without dead ends: 2963 [2020-12-22 15:13:42,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2020-12-22 15:13:42,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2020-12-22 15:13:43,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2963. [2020-12-22 15:13:43,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2963 states. [2020-12-22 15:13:43,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 4066 transitions. [2020-12-22 15:13:43,177 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 4066 transitions. Word has length 154 [2020-12-22 15:13:43,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 15:13:43,177 INFO L481 AbstractCegarLoop]: Abstraction has 2963 states and 4066 transitions. [2020-12-22 15:13:43,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 15:13:43,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 4066 transitions. [2020-12-22 15:13:43,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-22 15:13:43,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 15:13:43,186 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 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] [2020-12-22 15:13:43,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 15:13:43,400 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 15:13:43,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 15:13:43,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1228875380, now seen corresponding path program 1 times [2020-12-22 15:13:43,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 15:13:43,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759328457] [2020-12-22 15:13:43,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 15:13:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:13:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 15:13:43,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759328457] [2020-12-22 15:13:43,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480393724] [2020-12-22 15:13:43,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 15:13:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:13:45,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 2809 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 15:13:45,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 15:13:45,759 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 15:13:45,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 15:13:45,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-12-22 15:13:45,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014132004] [2020-12-22 15:13:45,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 15:13:45,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 15:13:45,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 15:13:45,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2020-12-22 15:13:45,762 INFO L87 Difference]: Start difference. First operand 2963 states and 4066 transitions. Second operand 20 states. [2020-12-22 15:13:47,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 15:13:47,245 INFO L93 Difference]: Finished difference Result 5935 states and 8169 transitions. [2020-12-22 15:13:47,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 15:13:47,246 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 155 [2020-12-22 15:13:47,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 15:13:47,252 INFO L225 Difference]: With dead ends: 5935 [2020-12-22 15:13:47,252 INFO L226 Difference]: Without dead ends: 2992 [2020-12-22 15:13:47,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2020-12-22 15:13:47,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2020-12-22 15:13:47,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 2992. [2020-12-22 15:13:47,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2992 states. [2020-12-22 15:13:47,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2992 states to 2992 states and 4095 transitions. [2020-12-22 15:13:47,592 INFO L78 Accepts]: Start accepts. Automaton has 2992 states and 4095 transitions. Word has length 155 [2020-12-22 15:13:47,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 15:13:47,593 INFO L481 AbstractCegarLoop]: Abstraction has 2992 states and 4095 transitions. [2020-12-22 15:13:47,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 15:13:47,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2992 states and 4095 transitions. [2020-12-22 15:13:47,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-22 15:13:47,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 15:13:47,601 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 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] [2020-12-22 15:13:47,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 15:13:47,816 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 15:13:47,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 15:13:47,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1792442880, now seen corresponding path program 2 times [2020-12-22 15:13:47,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 15:13:47,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102635141] [2020-12-22 15:13:47,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 15:13:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 15:13:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-22 15:13:48,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102635141] [2020-12-22 15:13:48,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224948505] [2020-12-22 15:13:48,300 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true