./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 173e3943 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 549c0f0e85f506f59a54b746c0743ded562d36f784f1b0fcb4bf7d5e1672332d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 14:31:10,978 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 14:31:10,979 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 14:31:11,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 14:31:11,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 14:31:11,045 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 14:31:11,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 14:31:11,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 14:31:11,051 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 14:31:11,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 14:31:11,055 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 14:31:11,056 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 14:31:11,057 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 14:31:11,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 14:31:11,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 14:31:11,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 14:31:11,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 14:31:11,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 14:31:11,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 14:31:11,072 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 14:31:11,073 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 14:31:11,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 14:31:11,076 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 14:31:11,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 14:31:11,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 14:31:11,082 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 14:31:11,082 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 14:31:11,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 14:31:11,084 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 14:31:11,085 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 14:31:11,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 14:31:11,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 14:31:11,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 14:31:11,089 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 14:31:11,090 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 14:31:11,090 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 14:31:11,091 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 14:31:11,091 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 14:31:11,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 14:31:11,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 14:31:11,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 14:31:11,093 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 14:31:11,123 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 14:31:11,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 14:31:11,125 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 14:31:11,125 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 14:31:11,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 14:31:11,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 14:31:11,126 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 14:31:11,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 14:31:11,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 14:31:11,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 14:31:11,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 14:31:11,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 14:31:11,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 14:31:11,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 14:31:11,127 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 14:31:11,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 14:31:11,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 14:31:11,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 14:31:11,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 14:31:11,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:31:11,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 14:31:11,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 14:31:11,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 14:31:11,128 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 14:31:11,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 14:31:11,128 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 14:31:11,128 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 14:31:11,129 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 14:31:11,129 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 14:31:11,129 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 549c0f0e85f506f59a54b746c0743ded562d36f784f1b0fcb4bf7d5e1672332d [2021-11-06 14:31:11,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 14:31:11,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 14:31:11,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 14:31:11,398 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 14:31:11,399 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 14:31:11,400 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i [2021-11-06 14:31:11,462 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ea86a3c6/67eb4d5175864134aea0b98d709f3fab/FLAG336e9eae3 [2021-11-06 14:31:12,070 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 14:31:12,071 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i [2021-11-06 14:31:12,106 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ea86a3c6/67eb4d5175864134aea0b98d709f3fab/FLAG336e9eae3 [2021-11-06 14:31:12,217 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ea86a3c6/67eb4d5175864134aea0b98d709f3fab [2021-11-06 14:31:12,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 14:31:12,220 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 14:31:12,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 14:31:12,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 14:31:12,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 14:31:12,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:31:12" (1/1) ... [2021-11-06 14:31:12,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43f18b6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:31:12, skipping insertion in model container [2021-11-06 14:31:12,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:31:12" (1/1) ... [2021-11-06 14:31:12,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 14:31:12,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 14:31:12,827 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i[160575,160588] [2021-11-06 14:31:13,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:31:13,342 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 14:31:13,450 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i[160575,160588] [2021-11-06 14:31:13,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:31:13,675 INFO L208 MainTranslator]: Completed translation [2021-11-06 14:31:13,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:31:13 WrapperNode [2021-11-06 14:31:13,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 14:31:13,678 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 14:31:13,678 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 14:31:13,678 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 14:31:13,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:31:13" (1/1) ... [2021-11-06 14:31:13,760 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:31:13" (1/1) ... [2021-11-06 14:31:13,962 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 14:31:13,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 14:31:13,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 14:31:13,963 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 14:31:13,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:31:13" (1/1) ... [2021-11-06 14:31:13,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:31:13" (1/1) ... [2021-11-06 14:31:14,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:31:13" (1/1) ... [2021-11-06 14:31:14,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:31:13" (1/1) ... [2021-11-06 14:31:14,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:31:13" (1/1) ... [2021-11-06 14:31:14,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:31:13" (1/1) ... [2021-11-06 14:31:14,174 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:31:13" (1/1) ... [2021-11-06 14:31:14,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 14:31:14,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 14:31:14,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 14:31:14,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 14:31:14,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:31:13" (1/1) ... [2021-11-06 14:31:14,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:31:14,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:31:14,284 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-06 14:31:14,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-06 14:31:14,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 14:31:14,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 14:31:14,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 14:31:14,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 14:31:14,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 14:31:14,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 14:31:14,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 14:31:14,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 14:31:14,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 14:31:14,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 14:31:14,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 14:31:14,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 14:31:14,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 14:31:14,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 14:31:14,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 14:31:18,733 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 14:31:18,733 INFO L299 CfgBuilder]: Removed 1046 assume(true) statements. [2021-11-06 14:31:18,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:31:18 BoogieIcfgContainer [2021-11-06 14:31:18,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 14:31:18,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 14:31:18,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 14:31:18,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 14:31:18,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 02:31:12" (1/3) ... [2021-11-06 14:31:18,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52e667ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:31:18, skipping insertion in model container [2021-11-06 14:31:18,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:31:13" (2/3) ... [2021-11-06 14:31:18,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52e667ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:31:18, skipping insertion in model container [2021-11-06 14:31:18,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:31:18" (3/3) ... [2021-11-06 14:31:18,744 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i [2021-11-06 14:31:18,747 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 14:31:18,748 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-06 14:31:18,790 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 14:31:18,794 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-06 14:31:18,795 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-06 14:31:18,859 INFO L276 IsEmpty]: Start isEmpty. Operand has 914 states, 912 states have (on average 1.3826754385964912) internal successors, (1261), 913 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:18,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-06 14:31:18,867 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:18,867 INFO L513 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] [2021-11-06 14:31:18,868 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:18,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:18,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1648518912, now seen corresponding path program 1 times [2021-11-06 14:31:18,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:18,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311917599] [2021-11-06 14:31:18,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:18,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:31:19,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:19,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311917599] [2021-11-06 14:31:19,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311917599] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:19,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:31:19,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:31:19,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700106725] [2021-11-06 14:31:19,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:31:19,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:19,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:31:19,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:31:19,318 INFO L87 Difference]: Start difference. First operand has 914 states, 912 states have (on average 1.3826754385964912) internal successors, (1261), 913 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:20,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:20,064 INFO L93 Difference]: Finished difference Result 2676 states and 3697 transitions. [2021-11-06 14:31:20,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:31:20,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-06 14:31:20,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:20,087 INFO L225 Difference]: With dead ends: 2676 [2021-11-06 14:31:20,088 INFO L226 Difference]: Without dead ends: 1753 [2021-11-06 14:31:20,093 INFO L786 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 [2021-11-06 14:31:20,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2021-11-06 14:31:20,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 1753. [2021-11-06 14:31:20,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1752 states have (on average 1.3293378995433789) internal successors, (2329), 1752 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:20,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2329 transitions. [2021-11-06 14:31:20,201 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2329 transitions. Word has length 29 [2021-11-06 14:31:20,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:20,201 INFO L470 AbstractCegarLoop]: Abstraction has 1753 states and 2329 transitions. [2021-11-06 14:31:20,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:20,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2329 transitions. [2021-11-06 14:31:20,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-06 14:31:20,205 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:20,205 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:31:20,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 14:31:20,206 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:20,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:20,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1054602339, now seen corresponding path program 1 times [2021-11-06 14:31:20,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:20,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141734095] [2021-11-06 14:31:20,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:20,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:31:20,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:20,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141734095] [2021-11-06 14:31:20,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141734095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:20,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:31:20,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:31:20,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561013245] [2021-11-06 14:31:20,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:31:20,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:20,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:31:20,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:31:20,359 INFO L87 Difference]: Start difference. First operand 1753 states and 2329 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:20,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:20,587 INFO L93 Difference]: Finished difference Result 5187 states and 6902 transitions. [2021-11-06 14:31:20,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:31:20,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-06 14:31:20,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:20,602 INFO L225 Difference]: With dead ends: 5187 [2021-11-06 14:31:20,602 INFO L226 Difference]: Without dead ends: 3464 [2021-11-06 14:31:20,606 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:31:20,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2021-11-06 14:31:20,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 3416. [2021-11-06 14:31:20,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3416 states, 3415 states have (on average 1.3308931185944364) internal successors, (4545), 3415 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:20,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 4545 transitions. [2021-11-06 14:31:20,735 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 4545 transitions. Word has length 36 [2021-11-06 14:31:20,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:20,736 INFO L470 AbstractCegarLoop]: Abstraction has 3416 states and 4545 transitions. [2021-11-06 14:31:20,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:20,736 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 4545 transitions. [2021-11-06 14:31:20,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-06 14:31:20,744 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:20,744 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 14:31:20,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 14:31:20,744 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:20,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:20,754 INFO L85 PathProgramCache]: Analyzing trace with hash 2040257624, now seen corresponding path program 1 times [2021-11-06 14:31:20,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:20,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165984273] [2021-11-06 14:31:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:20,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:31:20,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:20,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165984273] [2021-11-06 14:31:20,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165984273] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:20,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:31:20,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:31:20,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215070030] [2021-11-06 14:31:20,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:31:20,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:20,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:31:20,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:31:20,896 INFO L87 Difference]: Start difference. First operand 3416 states and 4545 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:21,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:21,082 INFO L93 Difference]: Finished difference Result 8837 states and 11752 transitions. [2021-11-06 14:31:21,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:31:21,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-06 14:31:21,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:21,102 INFO L225 Difference]: With dead ends: 8837 [2021-11-06 14:31:21,103 INFO L226 Difference]: Without dead ends: 5456 [2021-11-06 14:31:21,109 INFO L786 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 [2021-11-06 14:31:21,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5456 states. [2021-11-06 14:31:21,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5456 to 5446. [2021-11-06 14:31:21,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5446 states, 5445 states have (on average 1.3289256198347108) internal successors, (7236), 5445 states have internal predecessors, (7236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:21,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5446 states to 5446 states and 7236 transitions. [2021-11-06 14:31:21,256 INFO L78 Accepts]: Start accepts. Automaton has 5446 states and 7236 transitions. Word has length 74 [2021-11-06 14:31:21,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:21,257 INFO L470 AbstractCegarLoop]: Abstraction has 5446 states and 7236 transitions. [2021-11-06 14:31:21,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:21,257 INFO L276 IsEmpty]: Start isEmpty. Operand 5446 states and 7236 transitions. [2021-11-06 14:31:21,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-06 14:31:21,264 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:21,265 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:31:21,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 14:31:21,265 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:21,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:21,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1011975024, now seen corresponding path program 1 times [2021-11-06 14:31:21,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:21,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145126122] [2021-11-06 14:31:21,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:21,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:21,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:31:21,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:21,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145126122] [2021-11-06 14:31:21,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145126122] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:21,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:31:21,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:31:21,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569548932] [2021-11-06 14:31:21,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:31:21,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:21,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:31:21,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:31:21,400 INFO L87 Difference]: Start difference. First operand 5446 states and 7236 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:22,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:22,207 INFO L93 Difference]: Finished difference Result 12949 states and 17230 transitions. [2021-11-06 14:31:22,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:31:22,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-06 14:31:22,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:22,235 INFO L225 Difference]: With dead ends: 12949 [2021-11-06 14:31:22,235 INFO L226 Difference]: Without dead ends: 7538 [2021-11-06 14:31:22,245 INFO L786 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 [2021-11-06 14:31:22,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7538 states. [2021-11-06 14:31:22,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7538 to 7528. [2021-11-06 14:31:22,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7528 states, 7527 states have (on average 1.328417696293344) internal successors, (9999), 7527 states have internal predecessors, (9999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:22,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7528 states to 7528 states and 9999 transitions. [2021-11-06 14:31:22,452 INFO L78 Accepts]: Start accepts. Automaton has 7528 states and 9999 transitions. Word has length 84 [2021-11-06 14:31:22,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:22,453 INFO L470 AbstractCegarLoop]: Abstraction has 7528 states and 9999 transitions. [2021-11-06 14:31:22,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:22,453 INFO L276 IsEmpty]: Start isEmpty. Operand 7528 states and 9999 transitions. [2021-11-06 14:31:22,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-06 14:31:22,462 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:22,462 INFO L513 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:31:22,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 14:31:22,463 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:22,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:22,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1341541353, now seen corresponding path program 1 times [2021-11-06 14:31:22,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:22,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107902313] [2021-11-06 14:31:22,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:22,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:22,593 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:31:22,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:22,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107902313] [2021-11-06 14:31:22,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107902313] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:22,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:31:22,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:31:22,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370218141] [2021-11-06 14:31:22,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:31:22,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:22,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:31:22,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:31:22,596 INFO L87 Difference]: Start difference. First operand 7528 states and 9999 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:23,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:23,630 INFO L93 Difference]: Finished difference Result 17642 states and 23405 transitions. [2021-11-06 14:31:23,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:31:23,631 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-06 14:31:23,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:23,681 INFO L225 Difference]: With dead ends: 17642 [2021-11-06 14:31:23,682 INFO L226 Difference]: Without dead ends: 10149 [2021-11-06 14:31:23,698 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:31:23,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10149 states. [2021-11-06 14:31:23,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10149 to 7536. [2021-11-06 14:31:23,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7536 states, 7535 states have (on average 1.32806901128069) internal successors, (10007), 7535 states have internal predecessors, (10007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:23,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7536 states to 7536 states and 10007 transitions. [2021-11-06 14:31:23,944 INFO L78 Accepts]: Start accepts. Automaton has 7536 states and 10007 transitions. Word has length 96 [2021-11-06 14:31:23,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:23,945 INFO L470 AbstractCegarLoop]: Abstraction has 7536 states and 10007 transitions. [2021-11-06 14:31:23,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:23,946 INFO L276 IsEmpty]: Start isEmpty. Operand 7536 states and 10007 transitions. [2021-11-06 14:31:23,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-06 14:31:23,961 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:23,961 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:31:23,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 14:31:23,962 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:23,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:23,962 INFO L85 PathProgramCache]: Analyzing trace with hash -72857761, now seen corresponding path program 1 times [2021-11-06 14:31:23,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:23,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746753571] [2021-11-06 14:31:23,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:23,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:31:24,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:24,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746753571] [2021-11-06 14:31:24,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746753571] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:24,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:31:24,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:31:24,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604019631] [2021-11-06 14:31:24,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:31:24,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:24,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:31:24,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:31:24,129 INFO L87 Difference]: Start difference. First operand 7536 states and 10007 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:24,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:24,821 INFO L93 Difference]: Finished difference Result 31316 states and 41615 transitions. [2021-11-06 14:31:24,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:31:24,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-06 14:31:24,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:24,884 INFO L225 Difference]: With dead ends: 31316 [2021-11-06 14:31:24,884 INFO L226 Difference]: Without dead ends: 23815 [2021-11-06 14:31:24,908 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:31:24,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23815 states. [2021-11-06 14:31:25,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23815 to 7544. [2021-11-06 14:31:25,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7544 states, 7543 states have (on average 1.3277210658889036) internal successors, (10015), 7543 states have internal predecessors, (10015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:25,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7544 states to 7544 states and 10015 transitions. [2021-11-06 14:31:25,310 INFO L78 Accepts]: Start accepts. Automaton has 7544 states and 10015 transitions. Word has length 114 [2021-11-06 14:31:25,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:25,311 INFO L470 AbstractCegarLoop]: Abstraction has 7544 states and 10015 transitions. [2021-11-06 14:31:25,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:25,311 INFO L276 IsEmpty]: Start isEmpty. Operand 7544 states and 10015 transitions. [2021-11-06 14:31:25,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-06 14:31:25,319 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:25,319 INFO L513 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:31:25,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 14:31:25,320 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:25,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:25,320 INFO L85 PathProgramCache]: Analyzing trace with hash 528150739, now seen corresponding path program 1 times [2021-11-06 14:31:25,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:25,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824222907] [2021-11-06 14:31:25,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:25,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:25,468 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:31:25,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:25,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824222907] [2021-11-06 14:31:25,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824222907] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:25,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:31:25,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:31:25,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119863229] [2021-11-06 14:31:25,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:31:25,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:25,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:31:25,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:31:25,474 INFO L87 Difference]: Start difference. First operand 7544 states and 10015 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:26,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:26,215 INFO L93 Difference]: Finished difference Result 17686 states and 23449 transitions. [2021-11-06 14:31:26,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:31:26,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-11-06 14:31:26,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:26,241 INFO L225 Difference]: With dead ends: 17686 [2021-11-06 14:31:26,241 INFO L226 Difference]: Without dead ends: 10177 [2021-11-06 14:31:26,254 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:31:26,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10177 states. [2021-11-06 14:31:26,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10177 to 7544. [2021-11-06 14:31:26,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7544 states, 7543 states have (on average 1.3277210658889036) internal successors, (10015), 7543 states have internal predecessors, (10015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:26,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7544 states to 7544 states and 10015 transitions. [2021-11-06 14:31:26,493 INFO L78 Accepts]: Start accepts. Automaton has 7544 states and 10015 transitions. Word has length 115 [2021-11-06 14:31:26,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:26,494 INFO L470 AbstractCegarLoop]: Abstraction has 7544 states and 10015 transitions. [2021-11-06 14:31:26,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:26,494 INFO L276 IsEmpty]: Start isEmpty. Operand 7544 states and 10015 transitions. [2021-11-06 14:31:26,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-06 14:31:26,502 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:26,502 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:31:26,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 14:31:26,503 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:26,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:26,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1387417399, now seen corresponding path program 1 times [2021-11-06 14:31:26,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:26,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750293817] [2021-11-06 14:31:26,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:26,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:31:26,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:26,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750293817] [2021-11-06 14:31:26,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750293817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:26,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:31:26,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:31:26,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043973090] [2021-11-06 14:31:26,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:31:26,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:26,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:31:26,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:31:26,661 INFO L87 Difference]: Start difference. First operand 7544 states and 10015 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:27,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:27,623 INFO L93 Difference]: Finished difference Result 37373 states and 49631 transitions. [2021-11-06 14:31:27,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:31:27,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-06 14:31:27,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:27,679 INFO L225 Difference]: With dead ends: 37373 [2021-11-06 14:31:27,680 INFO L226 Difference]: Without dead ends: 29864 [2021-11-06 14:31:27,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:31:27,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29864 states. [2021-11-06 14:31:28,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29864 to 7552. [2021-11-06 14:31:28,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7552 states, 7551 states have (on average 1.3273738577671832) internal successors, (10023), 7551 states have internal predecessors, (10023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:28,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7552 states to 7552 states and 10023 transitions. [2021-11-06 14:31:28,189 INFO L78 Accepts]: Start accepts. Automaton has 7552 states and 10023 transitions. Word has length 122 [2021-11-06 14:31:28,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:28,190 INFO L470 AbstractCegarLoop]: Abstraction has 7552 states and 10023 transitions. [2021-11-06 14:31:28,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:28,190 INFO L276 IsEmpty]: Start isEmpty. Operand 7552 states and 10023 transitions. [2021-11-06 14:31:28,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-06 14:31:28,199 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:28,200 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:31:28,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-06 14:31:28,200 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:28,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:28,201 INFO L85 PathProgramCache]: Analyzing trace with hash -655559387, now seen corresponding path program 1 times [2021-11-06 14:31:28,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:28,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691968031] [2021-11-06 14:31:28,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:28,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:31:28,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:28,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691968031] [2021-11-06 14:31:28,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691968031] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:31:28,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570336709] [2021-11-06 14:31:28,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:28,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:31:28,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:31:28,399 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:31:28,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-06 14:31:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:29,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 2502 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 14:31:29,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:31:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:31:29,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570336709] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:29,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:31:29,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-06 14:31:29,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225622484] [2021-11-06 14:31:29,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:31:29,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:29,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:31:29,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:31:29,492 INFO L87 Difference]: Start difference. First operand 7552 states and 10023 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:30,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:30,816 INFO L93 Difference]: Finished difference Result 22589 states and 29987 transitions. [2021-11-06 14:31:30,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:31:30,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-06 14:31:30,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:30,854 INFO L225 Difference]: With dead ends: 22589 [2021-11-06 14:31:30,855 INFO L226 Difference]: Without dead ends: 22582 [2021-11-06 14:31:30,865 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:31:30,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22582 states. [2021-11-06 14:31:31,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22582 to 22224. [2021-11-06 14:31:31,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22224 states, 22223 states have (on average 1.3289834855780047) internal successors, (29534), 22223 states have internal predecessors, (29534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:31,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22224 states to 22224 states and 29534 transitions. [2021-11-06 14:31:31,686 INFO L78 Accepts]: Start accepts. Automaton has 22224 states and 29534 transitions. Word has length 125 [2021-11-06 14:31:31,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:31,686 INFO L470 AbstractCegarLoop]: Abstraction has 22224 states and 29534 transitions. [2021-11-06 14:31:31,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:31,687 INFO L276 IsEmpty]: Start isEmpty. Operand 22224 states and 29534 transitions. [2021-11-06 14:31:31,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-06 14:31:31,705 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:31,705 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:31:31,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-06 14:31:31,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:31:31,920 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:31,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:31,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1242365401, now seen corresponding path program 1 times [2021-11-06 14:31:31,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:31,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074883768] [2021-11-06 14:31:31,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:31,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:32,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:31:32,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:32,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074883768] [2021-11-06 14:31:32,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074883768] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:32,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:31:32,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:31:32,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753634086] [2021-11-06 14:31:32,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:31:32,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:32,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:31:32,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:31:32,072 INFO L87 Difference]: Start difference. First operand 22224 states and 29534 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:33,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:33,778 INFO L93 Difference]: Finished difference Result 56977 states and 75584 transitions. [2021-11-06 14:31:33,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:31:33,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-06 14:31:33,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:33,843 INFO L225 Difference]: With dead ends: 56977 [2021-11-06 14:31:33,844 INFO L226 Difference]: Without dead ends: 34788 [2021-11-06 14:31:33,893 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:31:33,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34788 states. [2021-11-06 14:31:34,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34788 to 22216. [2021-11-06 14:31:34,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22216 states, 22215 states have (on average 1.3285617825793383) internal successors, (29514), 22215 states have internal predecessors, (29514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:34,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22216 states to 22216 states and 29514 transitions. [2021-11-06 14:31:34,831 INFO L78 Accepts]: Start accepts. Automaton has 22216 states and 29514 transitions. Word has length 125 [2021-11-06 14:31:34,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:34,832 INFO L470 AbstractCegarLoop]: Abstraction has 22216 states and 29514 transitions. [2021-11-06 14:31:34,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:34,832 INFO L276 IsEmpty]: Start isEmpty. Operand 22216 states and 29514 transitions. [2021-11-06 14:31:34,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-06 14:31:34,848 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:34,849 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:31:34,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-06 14:31:34,849 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:34,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:34,850 INFO L85 PathProgramCache]: Analyzing trace with hash -604554894, now seen corresponding path program 1 times [2021-11-06 14:31:34,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:34,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242468844] [2021-11-06 14:31:34,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:34,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:34,941 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:31:34,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:34,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242468844] [2021-11-06 14:31:34,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242468844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:34,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:31:34,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:31:34,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125677586] [2021-11-06 14:31:34,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:31:34,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:34,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:31:34,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:31:34,943 INFO L87 Difference]: Start difference. First operand 22216 states and 29514 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:36,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:36,146 INFO L93 Difference]: Finished difference Result 34895 states and 46362 transitions. [2021-11-06 14:31:36,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:31:36,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-06 14:31:36,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:36,164 INFO L225 Difference]: With dead ends: 34895 [2021-11-06 14:31:36,165 INFO L226 Difference]: Without dead ends: 12711 [2021-11-06 14:31:36,186 INFO L786 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 [2021-11-06 14:31:36,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12711 states. [2021-11-06 14:31:36,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12711 to 12704. [2021-11-06 14:31:36,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12704 states, 12703 states have (on average 1.3284263559789027) internal successors, (16875), 12703 states have internal predecessors, (16875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:36,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12704 states to 12704 states and 16875 transitions. [2021-11-06 14:31:36,780 INFO L78 Accepts]: Start accepts. Automaton has 12704 states and 16875 transitions. Word has length 130 [2021-11-06 14:31:36,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:36,781 INFO L470 AbstractCegarLoop]: Abstraction has 12704 states and 16875 transitions. [2021-11-06 14:31:36,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:36,781 INFO L276 IsEmpty]: Start isEmpty. Operand 12704 states and 16875 transitions. [2021-11-06 14:31:36,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-06 14:31:36,789 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:36,789 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:31:36,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-06 14:31:36,789 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:36,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:36,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1963548884, now seen corresponding path program 1 times [2021-11-06 14:31:36,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:36,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872876775] [2021-11-06 14:31:36,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:36,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:36,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:31:36,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:36,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872876775] [2021-11-06 14:31:36,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872876775] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:36,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:31:36,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:31:36,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217872183] [2021-11-06 14:31:36,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:31:36,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:36,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:31:36,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:31:36,901 INFO L87 Difference]: Start difference. First operand 12704 states and 16875 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:37,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:37,757 INFO L93 Difference]: Finished difference Result 34996 states and 46511 transitions. [2021-11-06 14:31:37,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:31:37,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-06 14:31:37,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:37,785 INFO L225 Difference]: With dead ends: 34996 [2021-11-06 14:31:37,785 INFO L226 Difference]: Without dead ends: 23850 [2021-11-06 14:31:37,800 INFO L786 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 [2021-11-06 14:31:37,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23850 states. [2021-11-06 14:31:38,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23850 to 12710. [2021-11-06 14:31:38,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12710 states, 12709 states have (on average 1.3282713038004563) internal successors, (16881), 12709 states have internal predecessors, (16881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:38,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12710 states to 12710 states and 16881 transitions. [2021-11-06 14:31:38,463 INFO L78 Accepts]: Start accepts. Automaton has 12710 states and 16881 transitions. Word has length 132 [2021-11-06 14:31:38,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:38,464 INFO L470 AbstractCegarLoop]: Abstraction has 12710 states and 16881 transitions. [2021-11-06 14:31:38,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:38,464 INFO L276 IsEmpty]: Start isEmpty. Operand 12710 states and 16881 transitions. [2021-11-06 14:31:38,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-06 14:31:38,472 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:38,473 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:31:38,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-06 14:31:38,473 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:38,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:38,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1101609432, now seen corresponding path program 1 times [2021-11-06 14:31:38,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:38,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206796504] [2021-11-06 14:31:38,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:38,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:38,652 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:31:38,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:38,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206796504] [2021-11-06 14:31:38,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206796504] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:38,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:31:38,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:31:38,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47705985] [2021-11-06 14:31:38,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:31:38,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:38,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:31:38,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:31:38,655 INFO L87 Difference]: Start difference. First operand 12710 states and 16881 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:40,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:40,135 INFO L93 Difference]: Finished difference Result 23813 states and 31644 transitions. [2021-11-06 14:31:40,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:31:40,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-06 14:31:40,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:40,147 INFO L225 Difference]: With dead ends: 23813 [2021-11-06 14:31:40,147 INFO L226 Difference]: Without dead ends: 11138 [2021-11-06 14:31:40,160 INFO L786 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 [2021-11-06 14:31:40,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11138 states. [2021-11-06 14:31:40,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11138 to 11138. [2021-11-06 14:31:40,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11138 states, 11137 states have (on average 1.3258507677112328) internal successors, (14766), 11137 states have internal predecessors, (14766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:40,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11138 states to 11138 states and 14766 transitions. [2021-11-06 14:31:40,546 INFO L78 Accepts]: Start accepts. Automaton has 11138 states and 14766 transitions. Word has length 132 [2021-11-06 14:31:40,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:40,547 INFO L470 AbstractCegarLoop]: Abstraction has 11138 states and 14766 transitions. [2021-11-06 14:31:40,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:40,547 INFO L276 IsEmpty]: Start isEmpty. Operand 11138 states and 14766 transitions. [2021-11-06 14:31:40,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-06 14:31:40,555 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:40,555 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:31:40,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-06 14:31:40,556 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:40,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:40,556 INFO L85 PathProgramCache]: Analyzing trace with hash -560815859, now seen corresponding path program 1 times [2021-11-06 14:31:40,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:40,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572203404] [2021-11-06 14:31:40,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:40,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:40,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:31:40,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:40,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572203404] [2021-11-06 14:31:40,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572203404] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:31:40,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285254780] [2021-11-06 14:31:40,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:40,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:31:40,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:31:40,670 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:31:40,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-06 14:31:41,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:41,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 2569 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 14:31:41,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:31:41,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:31:41,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285254780] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:41,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:31:41,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-06 14:31:41,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210807709] [2021-11-06 14:31:41,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:31:41,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:41,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:31:41,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:31:41,622 INFO L87 Difference]: Start difference. First operand 11138 states and 14766 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:42,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:42,541 INFO L93 Difference]: Finished difference Result 26023 states and 34515 transitions. [2021-11-06 14:31:42,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:31:42,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-06 14:31:42,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:42,568 INFO L225 Difference]: With dead ends: 26023 [2021-11-06 14:31:42,568 INFO L226 Difference]: Without dead ends: 20464 [2021-11-06 14:31:42,586 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:31:42,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20464 states. [2021-11-06 14:31:43,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20464 to 11166. [2021-11-06 14:31:43,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11166 states, 11165 states have (on average 1.3250335871025527) internal successors, (14794), 11165 states have internal predecessors, (14794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:43,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11166 states to 11166 states and 14794 transitions. [2021-11-06 14:31:43,154 INFO L78 Accepts]: Start accepts. Automaton has 11166 states and 14794 transitions. Word has length 136 [2021-11-06 14:31:43,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:43,154 INFO L470 AbstractCegarLoop]: Abstraction has 11166 states and 14794 transitions. [2021-11-06 14:31:43,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:43,154 INFO L276 IsEmpty]: Start isEmpty. Operand 11166 states and 14794 transitions. [2021-11-06 14:31:43,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-06 14:31:43,160 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:43,160 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:31:43,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-06 14:31:43,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-06 14:31:43,361 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:43,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:43,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1241688413, now seen corresponding path program 1 times [2021-11-06 14:31:43,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:43,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162045809] [2021-11-06 14:31:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:43,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:43,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:31:43,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:43,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162045809] [2021-11-06 14:31:43,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162045809] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:43,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:31:43,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:31:43,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607811619] [2021-11-06 14:31:43,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:31:43,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:43,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:31:43,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:31:43,481 INFO L87 Difference]: Start difference. First operand 11166 states and 14794 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:43,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:43,911 INFO L93 Difference]: Finished difference Result 20908 states and 27736 transitions. [2021-11-06 14:31:43,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:31:43,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-06 14:31:43,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:43,925 INFO L225 Difference]: With dead ends: 20908 [2021-11-06 14:31:43,926 INFO L226 Difference]: Without dead ends: 11348 [2021-11-06 14:31:43,946 INFO L786 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 [2021-11-06 14:31:43,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11348 states. [2021-11-06 14:31:44,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11348 to 11180. [2021-11-06 14:31:44,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11180 states, 11179 states have (on average 1.3246265318901511) internal successors, (14808), 11179 states have internal predecessors, (14808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:44,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11180 states to 11180 states and 14808 transitions. [2021-11-06 14:31:44,365 INFO L78 Accepts]: Start accepts. Automaton has 11180 states and 14808 transitions. Word has length 136 [2021-11-06 14:31:44,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:44,366 INFO L470 AbstractCegarLoop]: Abstraction has 11180 states and 14808 transitions. [2021-11-06 14:31:44,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:44,366 INFO L276 IsEmpty]: Start isEmpty. Operand 11180 states and 14808 transitions. [2021-11-06 14:31:44,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-06 14:31:44,372 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:44,372 INFO L513 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:31:44,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-06 14:31:44,372 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:44,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:44,373 INFO L85 PathProgramCache]: Analyzing trace with hash 622000377, now seen corresponding path program 1 times [2021-11-06 14:31:44,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:44,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211964576] [2021-11-06 14:31:44,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:44,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:31:44,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:44,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211964576] [2021-11-06 14:31:44,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211964576] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:44,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:31:44,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:31:44,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997717490] [2021-11-06 14:31:44,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:31:44,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:44,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:31:44,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:31:44,490 INFO L87 Difference]: Start difference. First operand 11180 states and 14808 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:45,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:45,558 INFO L93 Difference]: Finished difference Result 23879 states and 31685 transitions. [2021-11-06 14:31:45,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:31:45,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-06 14:31:45,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:45,576 INFO L225 Difference]: With dead ends: 23879 [2021-11-06 14:31:45,576 INFO L226 Difference]: Without dead ends: 14305 [2021-11-06 14:31:45,584 INFO L786 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 [2021-11-06 14:31:45,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14305 states. [2021-11-06 14:31:46,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14305 to 14304. [2021-11-06 14:31:46,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14304 states, 14303 states have (on average 1.3251765363909669) internal successors, (18954), 14303 states have internal predecessors, (18954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:46,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14304 states to 14304 states and 18954 transitions. [2021-11-06 14:31:46,088 INFO L78 Accepts]: Start accepts. Automaton has 14304 states and 18954 transitions. Word has length 137 [2021-11-06 14:31:46,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:46,088 INFO L470 AbstractCegarLoop]: Abstraction has 14304 states and 18954 transitions. [2021-11-06 14:31:46,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:46,089 INFO L276 IsEmpty]: Start isEmpty. Operand 14304 states and 18954 transitions. [2021-11-06 14:31:46,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-06 14:31:46,095 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:46,095 INFO L513 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:31:46,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-06 14:31:46,095 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:46,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:46,096 INFO L85 PathProgramCache]: Analyzing trace with hash 341692227, now seen corresponding path program 1 times [2021-11-06 14:31:46,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:46,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804546792] [2021-11-06 14:31:46,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:46,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:31:46,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:46,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804546792] [2021-11-06 14:31:46,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804546792] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:46,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:31:46,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:31:46,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283601391] [2021-11-06 14:31:46,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:31:46,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:46,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:31:46,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:31:46,432 INFO L87 Difference]: Start difference. First operand 14304 states and 18954 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:48,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:48,334 INFO L93 Difference]: Finished difference Result 46921 states and 62179 transitions. [2021-11-06 14:31:48,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 14:31:48,334 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-06 14:31:48,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:48,379 INFO L225 Difference]: With dead ends: 46921 [2021-11-06 14:31:48,379 INFO L226 Difference]: Without dead ends: 34223 [2021-11-06 14:31:48,397 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:31:48,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34223 states. [2021-11-06 14:31:49,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34223 to 14322. [2021-11-06 14:31:49,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14322 states, 14321 states have (on average 1.3247678234760143) internal successors, (18972), 14321 states have internal predecessors, (18972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:49,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14322 states to 14322 states and 18972 transitions. [2021-11-06 14:31:49,099 INFO L78 Accepts]: Start accepts. Automaton has 14322 states and 18972 transitions. Word has length 137 [2021-11-06 14:31:49,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:49,099 INFO L470 AbstractCegarLoop]: Abstraction has 14322 states and 18972 transitions. [2021-11-06 14:31:49,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:49,100 INFO L276 IsEmpty]: Start isEmpty. Operand 14322 states and 18972 transitions. [2021-11-06 14:31:49,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-06 14:31:49,105 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:49,106 INFO L513 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:31:49,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-06 14:31:49,106 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:49,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:49,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1275223527, now seen corresponding path program 1 times [2021-11-06 14:31:49,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:49,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852930850] [2021-11-06 14:31:49,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:49,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:31:49,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:49,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852930850] [2021-11-06 14:31:49,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852930850] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:49,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:31:49,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-06 14:31:49,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659358931] [2021-11-06 14:31:49,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 14:31:49,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:49,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 14:31:49,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-06 14:31:49,293 INFO L87 Difference]: Start difference. First operand 14322 states and 18972 transitions. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:51,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:51,718 INFO L93 Difference]: Finished difference Result 66589 states and 88377 transitions. [2021-11-06 14:31:51,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 14:31:51,719 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-06 14:31:51,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:51,805 INFO L225 Difference]: With dead ends: 66589 [2021-11-06 14:31:51,805 INFO L226 Difference]: Without dead ends: 53873 [2021-11-06 14:31:51,837 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-06 14:31:51,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53873 states. [2021-11-06 14:31:52,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53873 to 14346. [2021-11-06 14:31:52,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14346 states, 14345 states have (on average 1.324224468455908) internal successors, (18996), 14345 states have internal predecessors, (18996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:52,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14346 states to 14346 states and 18996 transitions. [2021-11-06 14:31:52,906 INFO L78 Accepts]: Start accepts. Automaton has 14346 states and 18996 transitions. Word has length 139 [2021-11-06 14:31:52,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:52,907 INFO L470 AbstractCegarLoop]: Abstraction has 14346 states and 18996 transitions. [2021-11-06 14:31:52,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:52,907 INFO L276 IsEmpty]: Start isEmpty. Operand 14346 states and 18996 transitions. [2021-11-06 14:31:52,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-06 14:31:52,913 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:52,913 INFO L513 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:31:52,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-06 14:31:52,914 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:52,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:52,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1482052061, now seen corresponding path program 1 times [2021-11-06 14:31:52,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:52,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129479366] [2021-11-06 14:31:52,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:52,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:53,106 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:31:53,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:53,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129479366] [2021-11-06 14:31:53,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129479366] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:53,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:31:53,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:31:53,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698756265] [2021-11-06 14:31:53,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:31:53,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:53,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:31:53,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:31:53,109 INFO L87 Difference]: Start difference. First operand 14346 states and 18996 transitions. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:56,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:31:56,076 INFO L93 Difference]: Finished difference Result 65569 states and 87075 transitions. [2021-11-06 14:31:56,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:31:56,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-06 14:31:56,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:31:56,174 INFO L225 Difference]: With dead ends: 65569 [2021-11-06 14:31:56,174 INFO L226 Difference]: Without dead ends: 52829 [2021-11-06 14:31:56,204 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:31:56,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52829 states. [2021-11-06 14:31:57,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52829 to 14364. [2021-11-06 14:31:57,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14364 states, 14363 states have (on average 1.3238181438418157) internal successors, (19014), 14363 states have internal predecessors, (19014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:57,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14364 states to 14364 states and 19014 transitions. [2021-11-06 14:31:57,517 INFO L78 Accepts]: Start accepts. Automaton has 14364 states and 19014 transitions. Word has length 141 [2021-11-06 14:31:57,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:31:57,518 INFO L470 AbstractCegarLoop]: Abstraction has 14364 states and 19014 transitions. [2021-11-06 14:31:57,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:31:57,518 INFO L276 IsEmpty]: Start isEmpty. Operand 14364 states and 19014 transitions. [2021-11-06 14:31:57,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-06 14:31:57,524 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:31:57,525 INFO L513 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:31:57,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-06 14:31:57,525 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:31:57,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:31:57,525 INFO L85 PathProgramCache]: Analyzing trace with hash 268842815, now seen corresponding path program 1 times [2021-11-06 14:31:57,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:31:57,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962893907] [2021-11-06 14:31:57,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:31:57,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:31:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:31:57,699 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:31:57,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:31:57,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962893907] [2021-11-06 14:31:57,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962893907] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:31:57,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:31:57,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:31:57,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407350876] [2021-11-06 14:31:57,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:31:57,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:31:57,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:31:57,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:31:57,703 INFO L87 Difference]: Start difference. First operand 14364 states and 19014 transitions. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:01,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:01,005 INFO L93 Difference]: Finished difference Result 65587 states and 87087 transitions. [2021-11-06 14:32:01,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:32:01,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-06 14:32:01,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:01,093 INFO L225 Difference]: With dead ends: 65587 [2021-11-06 14:32:01,093 INFO L226 Difference]: Without dead ends: 52829 [2021-11-06 14:32:01,122 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:32:01,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52829 states. [2021-11-06 14:32:02,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52829 to 14382. [2021-11-06 14:32:02,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14382 states, 14381 states have (on average 1.3234128363813364) internal successors, (19032), 14381 states have internal predecessors, (19032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:02,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14382 states to 14382 states and 19032 transitions. [2021-11-06 14:32:02,395 INFO L78 Accepts]: Start accepts. Automaton has 14382 states and 19032 transitions. Word has length 143 [2021-11-06 14:32:02,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:02,396 INFO L470 AbstractCegarLoop]: Abstraction has 14382 states and 19032 transitions. [2021-11-06 14:32:02,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:02,396 INFO L276 IsEmpty]: Start isEmpty. Operand 14382 states and 19032 transitions. [2021-11-06 14:32:02,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-06 14:32:02,401 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:02,401 INFO L513 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:02,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-06 14:32:02,401 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:02,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:02,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1097768443, now seen corresponding path program 1 times [2021-11-06 14:32:02,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:02,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704681912] [2021-11-06 14:32:02,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:02,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:02,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:32:02,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:02,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704681912] [2021-11-06 14:32:02,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704681912] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:32:02,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:32:02,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:32:02,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524663503] [2021-11-06 14:32:02,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:32:02,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:02,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:32:02,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:32:02,568 INFO L87 Difference]: Start difference. First operand 14382 states and 19032 transitions. Second operand has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:06,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:06,108 INFO L93 Difference]: Finished difference Result 65117 states and 86467 transitions. [2021-11-06 14:32:06,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:32:06,111 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-11-06 14:32:06,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:06,212 INFO L225 Difference]: With dead ends: 65117 [2021-11-06 14:32:06,212 INFO L226 Difference]: Without dead ends: 52341 [2021-11-06 14:32:06,245 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:32:06,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52341 states. [2021-11-06 14:32:07,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52341 to 14400. [2021-11-06 14:32:07,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14400 states, 14399 states have (on average 1.3230085422598792) internal successors, (19050), 14399 states have internal predecessors, (19050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:07,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14400 states to 14400 states and 19050 transitions. [2021-11-06 14:32:07,645 INFO L78 Accepts]: Start accepts. Automaton has 14400 states and 19050 transitions. Word has length 145 [2021-11-06 14:32:07,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:07,646 INFO L470 AbstractCegarLoop]: Abstraction has 14400 states and 19050 transitions. [2021-11-06 14:32:07,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:07,646 INFO L276 IsEmpty]: Start isEmpty. Operand 14400 states and 19050 transitions. [2021-11-06 14:32:07,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-06 14:32:07,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:07,653 INFO L513 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:07,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-06 14:32:07,654 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:07,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:07,654 INFO L85 PathProgramCache]: Analyzing trace with hash 503951895, now seen corresponding path program 1 times [2021-11-06 14:32:07,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:07,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270327489] [2021-11-06 14:32:07,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:07,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:32:07,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:07,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270327489] [2021-11-06 14:32:07,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270327489] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:32:07,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:32:07,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:32:07,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506835235] [2021-11-06 14:32:07,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:32:07,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:07,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:32:07,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:32:07,817 INFO L87 Difference]: Start difference. First operand 14400 states and 19050 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:10,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:10,033 INFO L93 Difference]: Finished difference Result 39268 states and 52085 transitions. [2021-11-06 14:32:10,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:32:10,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-11-06 14:32:10,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:10,081 INFO L225 Difference]: With dead ends: 39268 [2021-11-06 14:32:10,090 INFO L226 Difference]: Without dead ends: 26474 [2021-11-06 14:32:10,113 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:32:10,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26474 states. [2021-11-06 14:32:11,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26474 to 14382. [2021-11-06 14:32:11,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14382 states, 14381 states have (on average 1.3221611848967387) internal successors, (19014), 14381 states have internal predecessors, (19014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:11,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14382 states to 14382 states and 19014 transitions. [2021-11-06 14:32:11,404 INFO L78 Accepts]: Start accepts. Automaton has 14382 states and 19014 transitions. Word has length 147 [2021-11-06 14:32:11,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:11,405 INFO L470 AbstractCegarLoop]: Abstraction has 14382 states and 19014 transitions. [2021-11-06 14:32:11,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:11,405 INFO L276 IsEmpty]: Start isEmpty. Operand 14382 states and 19014 transitions. [2021-11-06 14:32:11,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-06 14:32:11,415 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:11,415 INFO L513 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:11,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-06 14:32:11,416 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:11,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:11,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1102294551, now seen corresponding path program 1 times [2021-11-06 14:32:11,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:11,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352131090] [2021-11-06 14:32:11,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:11,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:11,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:11,605 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-06 14:32:11,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:11,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352131090] [2021-11-06 14:32:11,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352131090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:32:11,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:32:11,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:32:11,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450455339] [2021-11-06 14:32:11,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:32:11,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:11,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:32:11,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:32:11,609 INFO L87 Difference]: Start difference. First operand 14382 states and 19014 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:12,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:12,931 INFO L93 Difference]: Finished difference Result 28731 states and 37989 transitions. [2021-11-06 14:32:12,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:32:12,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-11-06 14:32:12,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:12,950 INFO L225 Difference]: With dead ends: 28731 [2021-11-06 14:32:12,950 INFO L226 Difference]: Without dead ends: 14383 [2021-11-06 14:32:12,966 INFO L786 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 [2021-11-06 14:32:12,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14383 states. [2021-11-06 14:32:14,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14383 to 14383. [2021-11-06 14:32:14,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14383 states, 14382 states have (on average 1.3221387845918509) internal successors, (19015), 14382 states have internal predecessors, (19015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:14,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14383 states to 14383 states and 19015 transitions. [2021-11-06 14:32:14,331 INFO L78 Accepts]: Start accepts. Automaton has 14383 states and 19015 transitions. Word has length 147 [2021-11-06 14:32:14,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:14,331 INFO L470 AbstractCegarLoop]: Abstraction has 14383 states and 19015 transitions. [2021-11-06 14:32:14,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:14,331 INFO L276 IsEmpty]: Start isEmpty. Operand 14383 states and 19015 transitions. [2021-11-06 14:32:14,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-06 14:32:14,337 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:14,337 INFO L513 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:14,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-06 14:32:14,337 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:14,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:14,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1313175400, now seen corresponding path program 1 times [2021-11-06 14:32:14,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:14,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593617824] [2021-11-06 14:32:14,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:14,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:14,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-06 14:32:14,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:14,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593617824] [2021-11-06 14:32:14,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593617824] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:32:14,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754126308] [2021-11-06 14:32:14,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:14,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:14,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:32:14,611 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:32:14,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-06 14:32:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:17,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 2705 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-06 14:32:17,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:32:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:32:17,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754126308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:32:17,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:32:17,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-11-06 14:32:17,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493361974] [2021-11-06 14:32:17,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 14:32:17,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:17,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 14:32:17,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:32:17,610 INFO L87 Difference]: Start difference. First operand 14383 states and 19015 transitions. Second operand has 7 states, 7 states have (on average 33.714285714285715) internal successors, (236), 7 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:19,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:19,526 INFO L93 Difference]: Finished difference Result 30690 states and 40548 transitions. [2021-11-06 14:32:19,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:32:19,527 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.714285714285715) internal successors, (236), 7 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-11-06 14:32:19,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:19,547 INFO L225 Difference]: With dead ends: 30690 [2021-11-06 14:32:19,547 INFO L226 Difference]: Without dead ends: 16342 [2021-11-06 14:32:19,566 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:32:19,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16342 states. [2021-11-06 14:32:20,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16342 to 14390. [2021-11-06 14:32:20,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14390 states, 14389 states have (on average 1.3219820696365279) internal successors, (19022), 14389 states have internal predecessors, (19022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:20,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14390 states to 14390 states and 19022 transitions. [2021-11-06 14:32:20,698 INFO L78 Accepts]: Start accepts. Automaton has 14390 states and 19022 transitions. Word has length 148 [2021-11-06 14:32:20,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:20,698 INFO L470 AbstractCegarLoop]: Abstraction has 14390 states and 19022 transitions. [2021-11-06 14:32:20,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.714285714285715) internal successors, (236), 7 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:20,698 INFO L276 IsEmpty]: Start isEmpty. Operand 14390 states and 19022 transitions. [2021-11-06 14:32:20,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-06 14:32:20,705 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:20,705 INFO L513 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:20,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-06 14:32:20,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:20,906 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:20,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:20,907 INFO L85 PathProgramCache]: Analyzing trace with hash 680538361, now seen corresponding path program 1 times [2021-11-06 14:32:20,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:20,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298473645] [2021-11-06 14:32:20,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:20,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:21,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-06 14:32:21,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:21,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298473645] [2021-11-06 14:32:21,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298473645] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:32:21,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077010005] [2021-11-06 14:32:21,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:21,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:21,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:32:21,193 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:32:21,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-06 14:32:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:21,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 2747 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-06 14:32:21,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:32:22,333 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-06 14:32:22,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077010005] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:32:22,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:32:22,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-06 14:32:22,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569030540] [2021-11-06 14:32:22,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 14:32:22,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:22,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 14:32:22,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:32:22,335 INFO L87 Difference]: Start difference. First operand 14390 states and 19022 transitions. Second operand has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:26,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:26,867 INFO L93 Difference]: Finished difference Result 60442 states and 79880 transitions. [2021-11-06 14:32:26,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 14:32:26,868 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-11-06 14:32:26,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:26,941 INFO L225 Difference]: With dead ends: 60442 [2021-11-06 14:32:26,941 INFO L226 Difference]: Without dead ends: 46088 [2021-11-06 14:32:26,970 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-06 14:32:27,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46088 states. [2021-11-06 14:32:28,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46088 to 14541. [2021-11-06 14:32:28,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14541 states, 14540 states have (on average 1.3235900962861074) internal successors, (19245), 14540 states have internal predecessors, (19245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:28,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14541 states to 14541 states and 19245 transitions. [2021-11-06 14:32:28,535 INFO L78 Accepts]: Start accepts. Automaton has 14541 states and 19245 transitions. Word has length 150 [2021-11-06 14:32:28,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:28,535 INFO L470 AbstractCegarLoop]: Abstraction has 14541 states and 19245 transitions. [2021-11-06 14:32:28,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:28,535 INFO L276 IsEmpty]: Start isEmpty. Operand 14541 states and 19245 transitions. [2021-11-06 14:32:28,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-06 14:32:28,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:28,542 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:28,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-06 14:32:28,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:28,742 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:28,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:28,743 INFO L85 PathProgramCache]: Analyzing trace with hash 505768310, now seen corresponding path program 1 times [2021-11-06 14:32:28,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:28,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550820976] [2021-11-06 14:32:28,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:28,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:28,984 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-06 14:32:28,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:28,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550820976] [2021-11-06 14:32:28,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550820976] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:32:28,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604769401] [2021-11-06 14:32:28,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:28,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:28,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:32:28,987 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:32:28,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-06 14:32:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:31,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 2763 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-06 14:32:31,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:32:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-06 14:32:31,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604769401] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:32:31,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:32:31,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-11-06 14:32:31,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339344809] [2021-11-06 14:32:31,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-06 14:32:31,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:31,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-06 14:32:31,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-06 14:32:31,758 INFO L87 Difference]: Start difference. First operand 14541 states and 19245 transitions. Second operand has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:33,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:33,862 INFO L93 Difference]: Finished difference Result 31022 states and 41033 transitions. [2021-11-06 14:32:33,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 14:32:33,862 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-11-06 14:32:33,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:33,880 INFO L225 Difference]: With dead ends: 31022 [2021-11-06 14:32:33,880 INFO L226 Difference]: Without dead ends: 16518 [2021-11-06 14:32:33,890 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-06 14:32:33,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16518 states. [2021-11-06 14:32:35,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16518 to 14548. [2021-11-06 14:32:35,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14548 states, 14547 states have (on average 1.3234343850965835) internal successors, (19252), 14547 states have internal predecessors, (19252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:35,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14548 states to 14548 states and 19252 transitions. [2021-11-06 14:32:35,163 INFO L78 Accepts]: Start accepts. Automaton has 14548 states and 19252 transitions. Word has length 152 [2021-11-06 14:32:35,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:35,164 INFO L470 AbstractCegarLoop]: Abstraction has 14548 states and 19252 transitions. [2021-11-06 14:32:35,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.2) internal successors, (242), 10 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:35,164 INFO L276 IsEmpty]: Start isEmpty. Operand 14548 states and 19252 transitions. [2021-11-06 14:32:35,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-06 14:32:35,171 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:35,171 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:35,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-06 14:32:35,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-06 14:32:35,372 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:35,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:35,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1898773097, now seen corresponding path program 2 times [2021-11-06 14:32:35,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:35,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009502686] [2021-11-06 14:32:35,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:35,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-06 14:32:35,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:35,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009502686] [2021-11-06 14:32:35,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009502686] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:32:35,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532996224] [2021-11-06 14:32:35,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:32:35,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:35,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:32:35,758 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:32:35,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-06 14:32:43,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:32:43,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:32:43,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 2805 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-06 14:32:43,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:32:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-06 14:32:44,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532996224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:32:44,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:32:44,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-11-06 14:32:44,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59267461] [2021-11-06 14:32:44,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-06 14:32:44,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:44,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-06 14:32:44,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-06 14:32:44,138 INFO L87 Difference]: Start difference. First operand 14548 states and 19252 transitions. Second operand has 13 states, 13 states have (on average 12.23076923076923) internal successors, (159), 13 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:47,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:47,401 INFO L93 Difference]: Finished difference Result 39710 states and 52716 transitions. [2021-11-06 14:32:47,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-06 14:32:47,401 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.23076923076923) internal successors, (159), 13 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-11-06 14:32:47,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:47,443 INFO L225 Difference]: With dead ends: 39710 [2021-11-06 14:32:47,443 INFO L226 Difference]: Without dead ends: 26790 [2021-11-06 14:32:47,463 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-11-06 14:32:47,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26790 states. [2021-11-06 14:32:48,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26790 to 14554. [2021-11-06 14:32:48,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14554 states, 14553 states have (on average 1.3233010375867518) internal successors, (19258), 14553 states have internal predecessors, (19258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:48,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14554 states to 14554 states and 19258 transitions. [2021-11-06 14:32:48,989 INFO L78 Accepts]: Start accepts. Automaton has 14554 states and 19258 transitions. Word has length 154 [2021-11-06 14:32:48,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:48,989 INFO L470 AbstractCegarLoop]: Abstraction has 14554 states and 19258 transitions. [2021-11-06 14:32:48,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.23076923076923) internal successors, (159), 13 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:48,989 INFO L276 IsEmpty]: Start isEmpty. Operand 14554 states and 19258 transitions. [2021-11-06 14:32:48,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-06 14:32:48,997 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:48,997 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:49,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-06 14:32:49,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-06 14:32:49,197 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:49,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:49,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1445349419, now seen corresponding path program 3 times [2021-11-06 14:32:49,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:49,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427969067] [2021-11-06 14:32:49,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:49,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-06 14:32:49,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:49,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427969067] [2021-11-06 14:32:49,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427969067] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:32:49,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667943943] [2021-11-06 14:32:49,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:32:49,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:49,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:32:49,601 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:32:49,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-06 14:33:01,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-06 14:33:01,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:33:01,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 2723 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-06 14:33:01,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:33:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-06 14:33:02,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667943943] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:33:02,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:33:02,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 16 [2021-11-06 14:33:02,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580734765] [2021-11-06 14:33:02,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-06 14:33:02,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:33:02,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-06 14:33:02,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-11-06 14:33:02,264 INFO L87 Difference]: Start difference. First operand 14554 states and 19258 transitions. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:16,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:33:16,867 INFO L93 Difference]: Finished difference Result 130224 states and 172927 transitions. [2021-11-06 14:33:16,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-06 14:33:16,868 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-11-06 14:33:16,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:33:17,287 INFO L225 Difference]: With dead ends: 130224 [2021-11-06 14:33:17,287 INFO L226 Difference]: Without dead ends: 117298 [2021-11-06 14:33:17,322 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=322, Invalid=1238, Unknown=0, NotChecked=0, Total=1560 [2021-11-06 14:33:17,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117298 states. [2021-11-06 14:33:20,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117298 to 14572. [2021-11-06 14:33:20,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14572 states, 14571 states have (on average 1.3224898771532496) internal successors, (19270), 14571 states have internal predecessors, (19270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:20,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14572 states to 14572 states and 19270 transitions. [2021-11-06 14:33:20,150 INFO L78 Accepts]: Start accepts. Automaton has 14572 states and 19270 transitions. Word has length 155 [2021-11-06 14:33:20,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:33:20,150 INFO L470 AbstractCegarLoop]: Abstraction has 14572 states and 19270 transitions. [2021-11-06 14:33:20,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:20,151 INFO L276 IsEmpty]: Start isEmpty. Operand 14572 states and 19270 transitions. [2021-11-06 14:33:20,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-06 14:33:20,156 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:33:20,156 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:33:20,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-06 14:33:20,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:33:20,357 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:33:20,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:33:20,357 INFO L85 PathProgramCache]: Analyzing trace with hash -303910570, now seen corresponding path program 1 times [2021-11-06 14:33:20,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:33:20,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597269420] [2021-11-06 14:33:20,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:20,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:33:20,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:33:20,475 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-06 14:33:20,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:33:20,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597269420] [2021-11-06 14:33:20,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597269420] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:33:20,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492012141] [2021-11-06 14:33:20,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:20,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:33:20,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:33:20,478 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:33:20,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-06 14:33:21,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:33:21,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 2809 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 14:33:21,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:33:21,705 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-06 14:33:21,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492012141] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:33:21,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:33:21,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-06 14:33:21,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004667800] [2021-11-06 14:33:21,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:33:21,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:33:21,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:33:21,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:33:21,707 INFO L87 Difference]: Start difference. First operand 14572 states and 19270 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:27,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:33:27,702 INFO L93 Difference]: Finished difference Result 53386 states and 70630 transitions. [2021-11-06 14:33:27,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:33:27,703 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-11-06 14:33:27,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:33:27,754 INFO L225 Difference]: With dead ends: 53386 [2021-11-06 14:33:27,754 INFO L226 Difference]: Without dead ends: 40442 [2021-11-06 14:33:27,770 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:33:27,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40442 states. [2021-11-06 14:33:30,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40442 to 14722. [2021-11-06 14:33:30,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14722 states, 14721 states have (on average 1.3214455539705183) internal successors, (19453), 14721 states have internal predecessors, (19453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:30,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14722 states to 14722 states and 19453 transitions. [2021-11-06 14:33:30,153 INFO L78 Accepts]: Start accepts. Automaton has 14722 states and 19453 transitions. Word has length 156 [2021-11-06 14:33:30,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:33:30,154 INFO L470 AbstractCegarLoop]: Abstraction has 14722 states and 19453 transitions. [2021-11-06 14:33:30,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:30,154 INFO L276 IsEmpty]: Start isEmpty. Operand 14722 states and 19453 transitions. [2021-11-06 14:33:30,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-06 14:33:30,160 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:33:30,160 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:33:30,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-06 14:33:30,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-06 14:33:30,361 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:33:30,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:33:30,362 INFO L85 PathProgramCache]: Analyzing trace with hash -269932465, now seen corresponding path program 2 times [2021-11-06 14:33:30,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:33:30,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332322578] [2021-11-06 14:33:30,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:30,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:33:30,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:33:30,542 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-06 14:33:30,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:33:30,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332322578] [2021-11-06 14:33:30,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332322578] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:33:30,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:33:30,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:33:30,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945224665] [2021-11-06 14:33:30,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:33:30,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:33:30,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:33:30,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:33:30,544 INFO L87 Difference]: Start difference. First operand 14722 states and 19453 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:34,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:33:34,297 INFO L93 Difference]: Finished difference Result 33397 states and 44109 transitions. [2021-11-06 14:33:34,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:33:34,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-11-06 14:33:34,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:33:34,324 INFO L225 Difference]: With dead ends: 33397 [2021-11-06 14:33:34,325 INFO L226 Difference]: Without dead ends: 20303 [2021-11-06 14:33:34,341 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:33:34,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20303 states. [2021-11-06 14:33:36,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20303 to 14680. [2021-11-06 14:33:36,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14680 states, 14679 states have (on average 1.3195040534096327) internal successors, (19369), 14679 states have internal predecessors, (19369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:36,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14680 states to 14680 states and 19369 transitions. [2021-11-06 14:33:36,666 INFO L78 Accepts]: Start accepts. Automaton has 14680 states and 19369 transitions. Word has length 160 [2021-11-06 14:33:36,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:33:36,667 INFO L470 AbstractCegarLoop]: Abstraction has 14680 states and 19369 transitions. [2021-11-06 14:33:36,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:36,667 INFO L276 IsEmpty]: Start isEmpty. Operand 14680 states and 19369 transitions. [2021-11-06 14:33:36,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-06 14:33:36,674 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:33:36,674 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:33:36,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-06 14:33:36,674 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:33:36,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:33:36,674 INFO L85 PathProgramCache]: Analyzing trace with hash 840327395, now seen corresponding path program 1 times [2021-11-06 14:33:36,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:33:36,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706512646] [2021-11-06 14:33:36,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:36,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:33:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:33:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-06 14:33:36,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:33:36,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706512646] [2021-11-06 14:33:36,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706512646] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:33:36,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134330812] [2021-11-06 14:33:36,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:36,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:33:36,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:33:36,849 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:33:36,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-06 14:33:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:33:37,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 2870 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-06 14:33:37,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:33:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-06 14:33:38,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134330812] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:33:38,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:33:38,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-06 14:33:38,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107998097] [2021-11-06 14:33:38,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 14:33:38,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:33:38,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 14:33:38,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-06 14:33:38,209 INFO L87 Difference]: Start difference. First operand 14680 states and 19369 transitions. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:46,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:33:46,405 INFO L93 Difference]: Finished difference Result 66264 states and 87509 transitions. [2021-11-06 14:33:46,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:33:46,405 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2021-11-06 14:33:46,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:33:46,486 INFO L225 Difference]: With dead ends: 66264 [2021-11-06 14:33:46,486 INFO L226 Difference]: Without dead ends: 53212 [2021-11-06 14:33:46,511 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-06 14:33:46,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53212 states. [2021-11-06 14:33:49,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53212 to 14830. [2021-11-06 14:33:49,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14830 states, 14829 states have (on average 1.318497538606784) internal successors, (19552), 14829 states have internal predecessors, (19552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:49,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14830 states to 14830 states and 19552 transitions. [2021-11-06 14:33:49,162 INFO L78 Accepts]: Start accepts. Automaton has 14830 states and 19552 transitions. Word has length 162 [2021-11-06 14:33:49,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:33:49,163 INFO L470 AbstractCegarLoop]: Abstraction has 14830 states and 19552 transitions. [2021-11-06 14:33:49,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:49,163 INFO L276 IsEmpty]: Start isEmpty. Operand 14830 states and 19552 transitions. [2021-11-06 14:33:49,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-06 14:33:49,170 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:33:49,171 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:33:49,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-06 14:33:49,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:33:49,373 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:33:49,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:33:49,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1428424420, now seen corresponding path program 2 times [2021-11-06 14:33:49,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:33:49,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755831991] [2021-11-06 14:33:49,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:49,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:33:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:33:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-06 14:33:49,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:33:49,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755831991] [2021-11-06 14:33:49,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755831991] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:33:49,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288564297] [2021-11-06 14:33:49,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:33:49,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:33:49,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:33:49,626 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:33:49,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-06 14:33:53,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:33:53,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:33:53,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 2878 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-06 14:33:53,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:33:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-06 14:33:53,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288564297] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:33:53,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:33:53,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-06 14:33:53,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074095778] [2021-11-06 14:33:53,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 14:33:53,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:33:53,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 14:33:53,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:33:53,483 INFO L87 Difference]: Start difference. First operand 14830 states and 19552 transitions. Second operand has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:34:04,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:34:04,222 INFO L93 Difference]: Finished difference Result 79166 states and 104547 transitions. [2021-11-06 14:34:04,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:34:04,223 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-11-06 14:34:04,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:34:04,318 INFO L225 Difference]: With dead ends: 79166 [2021-11-06 14:34:04,319 INFO L226 Difference]: Without dead ends: 65964 [2021-11-06 14:34:04,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:34:04,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65964 states. [2021-11-06 14:34:07,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65964 to 14980. [2021-11-06 14:34:07,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14980 states, 14979 states have (on average 1.3175111823219174) internal successors, (19735), 14979 states have internal predecessors, (19735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:34:07,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14980 states to 14980 states and 19735 transitions. [2021-11-06 14:34:07,061 INFO L78 Accepts]: Start accepts. Automaton has 14980 states and 19735 transitions. Word has length 166 [2021-11-06 14:34:07,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:34:07,062 INFO L470 AbstractCegarLoop]: Abstraction has 14980 states and 19735 transitions. [2021-11-06 14:34:07,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:34:07,062 INFO L276 IsEmpty]: Start isEmpty. Operand 14980 states and 19735 transitions. [2021-11-06 14:34:07,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-06 14:34:07,069 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:34:07,069 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:34:07,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-06 14:34:07,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-06 14:34:07,270 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:34:07,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:34:07,271 INFO L85 PathProgramCache]: Analyzing trace with hash 2142115475, now seen corresponding path program 1 times [2021-11-06 14:34:07,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:34:07,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884404399] [2021-11-06 14:34:07,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:34:07,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:34:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:34:07,774 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-06 14:34:07,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:34:07,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884404399] [2021-11-06 14:34:07,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884404399] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:34:07,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224219284] [2021-11-06 14:34:07,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:34:07,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:34:07,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:34:07,776 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:34:07,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-06 14:34:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:34:12,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 2913 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-06 14:34:12,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:34:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-06 14:34:12,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224219284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:34:12,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:34:12,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-11-06 14:34:12,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573890188] [2021-11-06 14:34:12,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-06 14:34:12,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:34:12,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-06 14:34:12,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-06 14:34:12,834 INFO L87 Difference]: Start difference. First operand 14980 states and 19735 transitions. Second operand has 16 states, 16 states have (on average 10.4375) internal successors, (167), 16 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:34:18,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:34:18,771 INFO L93 Difference]: Finished difference Result 40955 states and 54105 transitions. [2021-11-06 14:34:18,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-06 14:34:18,771 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.4375) internal successors, (167), 16 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-11-06 14:34:18,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:34:18,806 INFO L225 Difference]: With dead ends: 40955 [2021-11-06 14:34:18,807 INFO L226 Difference]: Without dead ends: 27603 [2021-11-06 14:34:18,821 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-11-06 14:34:18,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27603 states. [2021-11-06 14:34:21,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27603 to 14986. [2021-11-06 14:34:21,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14986 states, 14985 states have (on average 1.317384050717384) internal successors, (19741), 14985 states have internal predecessors, (19741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:34:21,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14986 states to 14986 states and 19741 transitions. [2021-11-06 14:34:21,319 INFO L78 Accepts]: Start accepts. Automaton has 14986 states and 19741 transitions. Word has length 166 [2021-11-06 14:34:21,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:34:21,319 INFO L470 AbstractCegarLoop]: Abstraction has 14986 states and 19741 transitions. [2021-11-06 14:34:21,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.4375) internal successors, (167), 16 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:34:21,319 INFO L276 IsEmpty]: Start isEmpty. Operand 14986 states and 19741 transitions. [2021-11-06 14:34:21,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-06 14:34:21,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:34:21,327 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:34:21,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-06 14:34:21,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-06 14:34:21,528 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:34:21,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:34:21,528 INFO L85 PathProgramCache]: Analyzing trace with hash -731855271, now seen corresponding path program 2 times [2021-11-06 14:34:21,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:34:21,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666450141] [2021-11-06 14:34:21,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:34:21,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:34:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:34:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-06 14:34:21,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:34:21,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666450141] [2021-11-06 14:34:21,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666450141] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:34:21,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74100630] [2021-11-06 14:34:21,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:34:21,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:34:21,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:34:21,932 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:34:21,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-06 14:34:29,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:34:29,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:34:29,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 2949 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-06 14:34:29,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:34:29,916 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-06 14:34:29,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74100630] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:34:29,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:34:29,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-11-06 14:34:29,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639678620] [2021-11-06 14:34:29,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-06 14:34:29,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:34:29,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-06 14:34:29,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-11-06 14:34:29,918 INFO L87 Difference]: Start difference. First operand 14986 states and 19741 transitions. Second operand has 17 states, 17 states have (on average 9.882352941176471) internal successors, (168), 17 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:34:36,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:34:36,487 INFO L93 Difference]: Finished difference Result 40967 states and 54117 transitions. [2021-11-06 14:34:36,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-06 14:34:36,488 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 9.882352941176471) internal successors, (168), 17 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2021-11-06 14:34:36,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:34:36,524 INFO L225 Difference]: With dead ends: 40967 [2021-11-06 14:34:36,524 INFO L226 Difference]: Without dead ends: 27609 [2021-11-06 14:34:36,541 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-11-06 14:34:36,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27609 states. [2021-11-06 14:34:39,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27609 to 14992. [2021-11-06 14:34:39,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14992 states, 14991 states have (on average 1.3172570208791943) internal successors, (19747), 14991 states have internal predecessors, (19747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:34:39,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14992 states to 14992 states and 19747 transitions. [2021-11-06 14:34:39,107 INFO L78 Accepts]: Start accepts. Automaton has 14992 states and 19747 transitions. Word has length 167 [2021-11-06 14:34:39,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:34:39,108 INFO L470 AbstractCegarLoop]: Abstraction has 14992 states and 19747 transitions. [2021-11-06 14:34:39,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.882352941176471) internal successors, (168), 17 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:34:39,108 INFO L276 IsEmpty]: Start isEmpty. Operand 14992 states and 19747 transitions. [2021-11-06 14:34:39,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-06 14:34:39,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:34:39,115 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:34:39,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-06 14:34:39,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-06 14:34:39,316 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:34:39,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:34:39,317 INFO L85 PathProgramCache]: Analyzing trace with hash 369364819, now seen corresponding path program 3 times [2021-11-06 14:34:39,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:34:39,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071489640] [2021-11-06 14:34:39,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:34:39,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:34:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:34:39,740 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-06 14:34:39,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:34:39,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071489640] [2021-11-06 14:34:39,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071489640] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:34:39,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893017120] [2021-11-06 14:34:39,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:34:39,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:34:39,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:34:39,742 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:34:39,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process Killed by 15