./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.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-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.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 34ead930b8137fdc7abb50622ed73bdb27f2c7ae71d0ef3b9d44cfc9bee95799 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 17:46:02,900 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 17:46:02,901 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 17:46:02,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 17:46:02,946 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 17:46:02,947 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 17:46:02,949 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 17:46:02,953 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 17:46:02,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 17:46:02,955 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 17:46:02,955 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 17:46:02,957 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 17:46:02,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 17:46:02,958 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 17:46:02,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 17:46:02,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 17:46:02,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 17:46:02,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 17:46:02,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 17:46:02,965 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 17:46:02,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 17:46:02,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 17:46:02,970 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 17:46:02,971 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 17:46:02,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 17:46:02,972 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 17:46:02,973 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 17:46:02,973 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 17:46:02,973 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 17:46:02,974 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 17:46:02,974 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 17:46:02,975 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 17:46:02,975 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 17:46:02,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 17:46:02,976 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 17:46:02,977 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 17:46:02,977 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 17:46:02,977 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 17:46:02,978 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 17:46:02,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 17:46:02,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 17:46:02,979 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 17:46:02,994 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 17:46:03,000 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 17:46:03,001 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 17:46:03,001 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 17:46:03,002 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 17:46:03,003 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 17:46:03,003 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 17:46:03,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 17:46:03,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 17:46:03,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 17:46:03,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 17:46:03,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 17:46:03,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 17:46:03,005 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 17:46:03,005 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 17:46:03,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 17:46:03,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 17:46:03,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 17:46:03,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 17:46:03,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 17:46:03,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 17:46:03,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 17:46:03,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 17:46:03,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 17:46:03,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 17:46:03,007 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 17:46:03,007 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 17:46:03,008 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 17:46:03,008 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 17:46:03,008 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34ead930b8137fdc7abb50622ed73bdb27f2c7ae71d0ef3b9d44cfc9bee95799 [2021-11-06 17:46:03,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 17:46:03,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 17:46:03,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 17:46:03,187 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 17:46:03,188 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 17:46:03,189 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i [2021-11-06 17:46:03,244 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c42838fcc/25a6b18d63894257a339d1e9e035a378/FLAGb8df847a8 [2021-11-06 17:46:03,783 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 17:46:03,783 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i [2021-11-06 17:46:03,813 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c42838fcc/25a6b18d63894257a339d1e9e035a378/FLAGb8df847a8 [2021-11-06 17:46:04,211 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c42838fcc/25a6b18d63894257a339d1e9e035a378 [2021-11-06 17:46:04,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 17:46:04,214 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 17:46:04,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 17:46:04,218 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 17:46:04,220 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 17:46:04,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 05:46:04" (1/1) ... [2021-11-06 17:46:04,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54783ca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:46:04, skipping insertion in model container [2021-11-06 17:46:04,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 05:46:04" (1/1) ... [2021-11-06 17:46:04,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 17:46:04,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 17:46:04,896 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-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i[145794,145807] [2021-11-06 17:46:04,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 17:46:04,941 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 17:46:05,100 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-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i[145794,145807] [2021-11-06 17:46:05,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 17:46:05,139 INFO L208 MainTranslator]: Completed translation [2021-11-06 17:46:05,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:46:05 WrapperNode [2021-11-06 17:46:05,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 17:46:05,141 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 17:46:05,141 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 17:46:05,141 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 17:46:05,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:46:05" (1/1) ... [2021-11-06 17:46:05,188 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:46:05" (1/1) ... [2021-11-06 17:46:05,318 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 17:46:05,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 17:46:05,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 17:46:05,320 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 17:46:05,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:46:05" (1/1) ... [2021-11-06 17:46:05,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:46:05" (1/1) ... [2021-11-06 17:46:05,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:46:05" (1/1) ... [2021-11-06 17:46:05,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:46:05" (1/1) ... [2021-11-06 17:46:05,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:46:05" (1/1) ... [2021-11-06 17:46:05,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:46:05" (1/1) ... [2021-11-06 17:46:05,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:46:05" (1/1) ... [2021-11-06 17:46:05,511 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 17:46:05,512 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 17:46:05,512 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 17:46:05,512 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 17:46:05,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:46:05" (1/1) ... [2021-11-06 17:46:05,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 17:46:05,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:46:05,536 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 17:46:05,556 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 17:46:05,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 17:46:05,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 17:46:05,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 17:46:05,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 17:46:05,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 17:46:05,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 17:46:05,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 17:46:05,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 17:46:05,564 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-06 17:46:05,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 17:46:05,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 17:46:05,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 17:46:05,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 17:46:05,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 17:46:05,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 17:46:05,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 17:46:09,031 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 17:46:09,031 INFO L299 CfgBuilder]: Removed 938 assume(true) statements. [2021-11-06 17:46:09,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 05:46:09 BoogieIcfgContainer [2021-11-06 17:46:09,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 17:46:09,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 17:46:09,034 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 17:46:09,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 17:46:09,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 05:46:04" (1/3) ... [2021-11-06 17:46:09,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15696fd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 05:46:09, skipping insertion in model container [2021-11-06 17:46:09,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:46:05" (2/3) ... [2021-11-06 17:46:09,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15696fd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 05:46:09, skipping insertion in model container [2021-11-06 17:46:09,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 05:46:09" (3/3) ... [2021-11-06 17:46:09,038 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i [2021-11-06 17:46:09,041 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 17:46:09,041 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-06 17:46:09,073 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 17:46:09,076 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 17:46:09,077 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-06 17:46:09,094 INFO L276 IsEmpty]: Start isEmpty. Operand has 750 states, 743 states have (on average 1.4010767160161508) internal successors, (1041), 749 states have internal predecessors, (1041), 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 17:46:09,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-06 17:46:09,102 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:46:09,103 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:46:09,103 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:46:09,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:46:09,107 INFO L85 PathProgramCache]: Analyzing trace with hash -453684691, now seen corresponding path program 1 times [2021-11-06 17:46:09,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:46:09,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198100636] [2021-11-06 17:46:09,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:09,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:46:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:09,411 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 17:46:09,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:46:09,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198100636] [2021-11-06 17:46:09,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198100636] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:46:09,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:46:09,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 17:46:09,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734067512] [2021-11-06 17:46:09,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-06 17:46:09,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:46:09,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-06 17:46:09,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 17:46:09,432 INFO L87 Difference]: Start difference. First operand has 750 states, 743 states have (on average 1.4010767160161508) internal successors, (1041), 749 states have internal predecessors, (1041), 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 2 states, 2 states have (on average 37.0) internal successors, (74), 2 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 17:46:09,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:46:09,505 INFO L93 Difference]: Finished difference Result 1482 states and 2059 transitions. [2021-11-06 17:46:09,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-06 17:46:09,507 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 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 17:46:09,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:46:09,521 INFO L225 Difference]: With dead ends: 1482 [2021-11-06 17:46:09,522 INFO L226 Difference]: Without dead ends: 738 [2021-11-06 17:46:09,527 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 17:46:09,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2021-11-06 17:46:09,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 738. [2021-11-06 17:46:09,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 732 states have (on average 1.3743169398907105) internal successors, (1006), 737 states have internal predecessors, (1006), 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 17:46:09,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1006 transitions. [2021-11-06 17:46:09,591 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1006 transitions. Word has length 74 [2021-11-06 17:46:09,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:46:09,592 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 1006 transitions. [2021-11-06 17:46:09,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 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 17:46:09,592 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1006 transitions. [2021-11-06 17:46:09,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-06 17:46:09,600 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:46:09,600 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:46:09,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 17:46:09,600 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:46:09,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:46:09,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1696617127, now seen corresponding path program 1 times [2021-11-06 17:46:09,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:46:09,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365789110] [2021-11-06 17:46:09,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:09,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:46:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:09,730 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 17:46:09,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:46:09,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365789110] [2021-11-06 17:46:09,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365789110] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:46:09,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:46:09,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 17:46:09,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200215526] [2021-11-06 17:46:09,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 17:46:09,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:46:09,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 17:46:09,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 17:46:09,736 INFO L87 Difference]: Start difference. First operand 738 states and 1006 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 17:46:09,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:46:09,789 INFO L93 Difference]: Finished difference Result 1479 states and 2021 transitions. [2021-11-06 17:46:09,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 17:46:09,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 75 [2021-11-06 17:46:09,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:46:09,792 INFO L225 Difference]: With dead ends: 1479 [2021-11-06 17:46:09,792 INFO L226 Difference]: Without dead ends: 759 [2021-11-06 17:46:09,793 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 17:46:09,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-11-06 17:46:09,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 756. [2021-11-06 17:46:09,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 750 states have (on average 1.3773333333333333) internal successors, (1033), 755 states have internal predecessors, (1033), 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 17:46:09,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1033 transitions. [2021-11-06 17:46:09,804 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1033 transitions. Word has length 75 [2021-11-06 17:46:09,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:46:09,805 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 1033 transitions. [2021-11-06 17:46:09,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 17:46:09,805 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1033 transitions. [2021-11-06 17:46:09,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-06 17:46:09,806 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:46:09,806 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 17:46:09,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 17:46:09,807 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:46:09,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:46:09,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1668587877, now seen corresponding path program 1 times [2021-11-06 17:46:09,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:46:09,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972704225] [2021-11-06 17:46:09,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:09,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:46:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:09,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 17:46:09,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:46:09,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972704225] [2021-11-06 17:46:09,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972704225] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:46:09,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:46:09,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 17:46:09,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899462664] [2021-11-06 17:46:09,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 17:46:09,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:46:09,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 17:46:09,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 17:46:09,947 INFO L87 Difference]: Start difference. First operand 756 states and 1033 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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 17:46:10,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:46:10,529 INFO L93 Difference]: Finished difference Result 1527 states and 2097 transitions. [2021-11-06 17:46:10,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 17:46:10,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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 101 [2021-11-06 17:46:10,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:46:10,532 INFO L225 Difference]: With dead ends: 1527 [2021-11-06 17:46:10,532 INFO L226 Difference]: Without dead ends: 789 [2021-11-06 17:46:10,533 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 17:46:10,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-11-06 17:46:10,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 786. [2021-11-06 17:46:10,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 780 states have (on average 1.3807692307692307) internal successors, (1077), 785 states have internal predecessors, (1077), 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 17:46:10,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1077 transitions. [2021-11-06 17:46:10,544 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1077 transitions. Word has length 101 [2021-11-06 17:46:10,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:46:10,545 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 1077 transitions. [2021-11-06 17:46:10,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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 17:46:10,545 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1077 transitions. [2021-11-06 17:46:10,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-06 17:46:10,546 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:46:10,546 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:46:10,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 17:46:10,547 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:46:10,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:46:10,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1271589435, now seen corresponding path program 1 times [2021-11-06 17:46:10,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:46:10,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050263166] [2021-11-06 17:46:10,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:10,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:46:10,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 17:46:10,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:46:10,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050263166] [2021-11-06 17:46:10,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050263166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:46:10,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:46:10,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 17:46:10,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009544633] [2021-11-06 17:46:10,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 17:46:10,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:46:10,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 17:46:10,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 17:46:10,665 INFO L87 Difference]: Start difference. First operand 786 states and 1077 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 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 17:46:10,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:46:10,696 INFO L93 Difference]: Finished difference Result 2320 states and 3182 transitions. [2021-11-06 17:46:10,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 17:46:10,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 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 17:46:10,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:46:10,701 INFO L225 Difference]: With dead ends: 2320 [2021-11-06 17:46:10,702 INFO L226 Difference]: Without dead ends: 1552 [2021-11-06 17:46:10,703 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 17:46:10,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2021-11-06 17:46:10,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 787. [2021-11-06 17:46:10,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 781 states have (on average 1.380281690140845) internal successors, (1078), 786 states have internal predecessors, (1078), 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 17:46:10,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1078 transitions. [2021-11-06 17:46:10,717 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1078 transitions. Word has length 115 [2021-11-06 17:46:10,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:46:10,718 INFO L470 AbstractCegarLoop]: Abstraction has 787 states and 1078 transitions. [2021-11-06 17:46:10,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 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 17:46:10,718 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1078 transitions. [2021-11-06 17:46:10,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-06 17:46:10,720 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:46:10,721 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:46:10,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 17:46:10,721 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:46:10,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:46:10,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1069765501, now seen corresponding path program 1 times [2021-11-06 17:46:10,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:46:10,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243363305] [2021-11-06 17:46:10,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:10,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:46:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:10,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-06 17:46:10,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:46:10,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243363305] [2021-11-06 17:46:10,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243363305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:46:10,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:46:10,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 17:46:10,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824189025] [2021-11-06 17:46:10,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 17:46:10,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:46:10,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 17:46:10,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 17:46:10,851 INFO L87 Difference]: Start difference. First operand 787 states and 1078 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 17:46:10,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:46:10,876 INFO L93 Difference]: Finished difference Result 1558 states and 2137 transitions. [2021-11-06 17:46:10,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 17:46:10,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 17:46:10,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:46:10,881 INFO L225 Difference]: With dead ends: 1558 [2021-11-06 17:46:10,881 INFO L226 Difference]: Without dead ends: 789 [2021-11-06 17:46:10,882 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 17:46:10,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-11-06 17:46:10,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 789. [2021-11-06 17:46:10,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 783 states have (on average 1.3793103448275863) internal successors, (1080), 788 states have internal predecessors, (1080), 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 17:46:10,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1080 transitions. [2021-11-06 17:46:10,895 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1080 transitions. Word has length 115 [2021-11-06 17:46:10,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:46:10,896 INFO L470 AbstractCegarLoop]: Abstraction has 789 states and 1080 transitions. [2021-11-06 17:46:10,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 17:46:10,896 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1080 transitions. [2021-11-06 17:46:10,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-06 17:46:10,897 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:46:10,897 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:46:10,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 17:46:10,898 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:46:10,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:46:10,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1462792511, now seen corresponding path program 1 times [2021-11-06 17:46:10,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:46:10,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108029801] [2021-11-06 17:46:10,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:10,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:46:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:11,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-06 17:46:11,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:46:11,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108029801] [2021-11-06 17:46:11,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108029801] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:46:11,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:46:11,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 17:46:11,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724961283] [2021-11-06 17:46:11,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 17:46:11,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:46:11,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 17:46:11,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 17:46:11,040 INFO L87 Difference]: Start difference. First operand 789 states and 1080 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 17:46:11,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:46:11,236 INFO L93 Difference]: Finished difference Result 2247 states and 3092 transitions. [2021-11-06 17:46:11,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 17:46:11,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 17:46:11,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:46:11,242 INFO L225 Difference]: With dead ends: 2247 [2021-11-06 17:46:11,242 INFO L226 Difference]: Without dead ends: 1476 [2021-11-06 17:46:11,244 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 17:46:11,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2021-11-06 17:46:11,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 795. [2021-11-06 17:46:11,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 789 states have (on average 1.376425855513308) internal successors, (1086), 794 states have internal predecessors, (1086), 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 17:46:11,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1086 transitions. [2021-11-06 17:46:11,262 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1086 transitions. Word has length 115 [2021-11-06 17:46:11,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:46:11,262 INFO L470 AbstractCegarLoop]: Abstraction has 795 states and 1086 transitions. [2021-11-06 17:46:11,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 17:46:11,263 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1086 transitions. [2021-11-06 17:46:11,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-06 17:46:11,264 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:46:11,264 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:46:11,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 17:46:11,264 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:46:11,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:46:11,265 INFO L85 PathProgramCache]: Analyzing trace with hash 556019336, now seen corresponding path program 1 times [2021-11-06 17:46:11,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:46:11,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883128465] [2021-11-06 17:46:11,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:11,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:46:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 17:46:11,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:46:11,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883128465] [2021-11-06 17:46:11,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883128465] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:46:11,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:46:11,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 17:46:11,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366895398] [2021-11-06 17:46:11,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 17:46:11,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:46:11,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 17:46:11,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 17:46:11,366 INFO L87 Difference]: Start difference. First operand 795 states and 1086 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 17:46:11,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:46:11,445 INFO L93 Difference]: Finished difference Result 2229 states and 3074 transitions. [2021-11-06 17:46:11,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 17:46:11,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 119 [2021-11-06 17:46:11,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:46:11,449 INFO L225 Difference]: With dead ends: 2229 [2021-11-06 17:46:11,449 INFO L226 Difference]: Without dead ends: 1452 [2021-11-06 17:46:11,452 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 17:46:11,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2021-11-06 17:46:11,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 831. [2021-11-06 17:46:11,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 825 states have (on average 1.3745454545454545) internal successors, (1134), 830 states have internal predecessors, (1134), 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 17:46:11,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1134 transitions. [2021-11-06 17:46:11,466 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1134 transitions. Word has length 119 [2021-11-06 17:46:11,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:46:11,467 INFO L470 AbstractCegarLoop]: Abstraction has 831 states and 1134 transitions. [2021-11-06 17:46:11,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 17:46:11,467 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1134 transitions. [2021-11-06 17:46:11,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-06 17:46:11,468 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:46:11,468 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:46:11,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 17:46:11,469 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:46:11,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:46:11,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1859190524, now seen corresponding path program 1 times [2021-11-06 17:46:11,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:46:11,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852995412] [2021-11-06 17:46:11,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:11,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:46:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:11,574 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-06 17:46:11,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:46:11,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852995412] [2021-11-06 17:46:11,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852995412] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:46:11,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575240692] [2021-11-06 17:46:11,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:11,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:46:11,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:46:11,576 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 17:46:11,589 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 17:46:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:12,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 1885 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 17:46:12,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 17:46:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-06 17:46:12,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575240692] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:46:12,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 17:46:12,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-06 17:46:12,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478997914] [2021-11-06 17:46:12,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 17:46:12,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:46:12,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 17:46:12,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 17:46:12,348 INFO L87 Difference]: Start difference. First operand 831 states and 1134 transitions. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 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 17:46:12,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:46:12,698 INFO L93 Difference]: Finished difference Result 3048 states and 4185 transitions. [2021-11-06 17:46:12,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 17:46:12,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 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 124 [2021-11-06 17:46:12,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:46:12,706 INFO L225 Difference]: With dead ends: 3048 [2021-11-06 17:46:12,706 INFO L226 Difference]: Without dead ends: 2235 [2021-11-06 17:46:12,708 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 124 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 17:46:12,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2021-11-06 17:46:12,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 897. [2021-11-06 17:46:12,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 891 states have (on average 1.3602693602693603) internal successors, (1212), 896 states have internal predecessors, (1212), 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 17:46:12,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1212 transitions. [2021-11-06 17:46:12,736 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1212 transitions. Word has length 124 [2021-11-06 17:46:12,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:46:12,736 INFO L470 AbstractCegarLoop]: Abstraction has 897 states and 1212 transitions. [2021-11-06 17:46:12,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 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 17:46:12,736 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1212 transitions. [2021-11-06 17:46:12,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-06 17:46:12,738 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:46:12,738 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 17:46:12,760 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 17:46:12,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:46:12,956 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:46:12,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:46:12,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1755959531, now seen corresponding path program 1 times [2021-11-06 17:46:12,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:46:12,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831598160] [2021-11-06 17:46:12,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:12,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:46:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-06 17:46:13,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:46:13,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831598160] [2021-11-06 17:46:13,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831598160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:46:13,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:46:13,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 17:46:13,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837270627] [2021-11-06 17:46:13,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 17:46:13,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:46:13,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 17:46:13,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 17:46:13,039 INFO L87 Difference]: Start difference. First operand 897 states and 1212 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 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 17:46:13,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:46:13,097 INFO L93 Difference]: Finished difference Result 1923 states and 2614 transitions. [2021-11-06 17:46:13,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 17:46:13,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 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 128 [2021-11-06 17:46:13,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:46:13,100 INFO L225 Difference]: With dead ends: 1923 [2021-11-06 17:46:13,100 INFO L226 Difference]: Without dead ends: 1044 [2021-11-06 17:46:13,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 17:46:13,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-11-06 17:46:13,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 901. [2021-11-06 17:46:13,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 895 states have (on average 1.3586592178770949) internal successors, (1216), 900 states have internal predecessors, (1216), 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 17:46:13,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1216 transitions. [2021-11-06 17:46:13,117 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1216 transitions. Word has length 128 [2021-11-06 17:46:13,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:46:13,117 INFO L470 AbstractCegarLoop]: Abstraction has 901 states and 1216 transitions. [2021-11-06 17:46:13,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 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 17:46:13,118 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1216 transitions. [2021-11-06 17:46:13,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-06 17:46:13,119 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:46:13,119 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 17:46:13,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-06 17:46:13,120 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:46:13,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:46:13,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1790413165, now seen corresponding path program 1 times [2021-11-06 17:46:13,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:46:13,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599403767] [2021-11-06 17:46:13,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:13,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:46:13,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:13,242 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-06 17:46:13,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:46:13,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599403767] [2021-11-06 17:46:13,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599403767] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:46:13,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:46:13,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 17:46:13,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405281505] [2021-11-06 17:46:13,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 17:46:13,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:46:13,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 17:46:13,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 17:46:13,244 INFO L87 Difference]: Start difference. First operand 901 states and 1216 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 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 17:46:13,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:46:13,299 INFO L93 Difference]: Finished difference Result 1931 states and 2622 transitions. [2021-11-06 17:46:13,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 17:46:13,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 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 135 [2021-11-06 17:46:13,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:46:13,303 INFO L225 Difference]: With dead ends: 1931 [2021-11-06 17:46:13,303 INFO L226 Difference]: Without dead ends: 1048 [2021-11-06 17:46:13,304 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 17:46:13,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-11-06 17:46:13,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 901. [2021-11-06 17:46:13,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 895 states have (on average 1.3586592178770949) internal successors, (1216), 900 states have internal predecessors, (1216), 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 17:46:13,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1216 transitions. [2021-11-06 17:46:13,319 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1216 transitions. Word has length 135 [2021-11-06 17:46:13,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:46:13,320 INFO L470 AbstractCegarLoop]: Abstraction has 901 states and 1216 transitions. [2021-11-06 17:46:13,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 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 17:46:13,320 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1216 transitions. [2021-11-06 17:46:13,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-06 17:46:13,321 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:46:13,322 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 17:46:13,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-06 17:46:13,322 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:46:13,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:46:13,322 INFO L85 PathProgramCache]: Analyzing trace with hash 852192385, now seen corresponding path program 1 times [2021-11-06 17:46:13,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:46:13,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157276898] [2021-11-06 17:46:13,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:13,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:46:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:13,458 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-06 17:46:13,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:46:13,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157276898] [2021-11-06 17:46:13,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157276898] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:46:13,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613759976] [2021-11-06 17:46:13,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:13,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:46:13,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:46:13,476 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 17:46:13,477 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 17:46:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:13,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 1962 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-06 17:46:13,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 17:46:14,192 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-06 17:46:14,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613759976] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:46:14,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 17:46:14,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-06 17:46:14,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818656442] [2021-11-06 17:46:14,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 17:46:14,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:46:14,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 17:46:14,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-06 17:46:14,195 INFO L87 Difference]: Start difference. First operand 901 states and 1216 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 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 17:46:14,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:46:14,664 INFO L93 Difference]: Finished difference Result 3851 states and 5268 transitions. [2021-11-06 17:46:14,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 17:46:14,666 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 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 17:46:14,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:46:14,674 INFO L225 Difference]: With dead ends: 3851 [2021-11-06 17:46:14,675 INFO L226 Difference]: Without dead ends: 2968 [2021-11-06 17:46:14,676 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 17:46:14,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2968 states. [2021-11-06 17:46:14,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2968 to 985. [2021-11-06 17:46:14,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 979 states have (on average 1.352400408580184) internal successors, (1324), 984 states have internal predecessors, (1324), 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 17:46:14,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1324 transitions. [2021-11-06 17:46:14,702 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1324 transitions. Word has length 136 [2021-11-06 17:46:14,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:46:14,702 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 1324 transitions. [2021-11-06 17:46:14,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 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 17:46:14,703 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1324 transitions. [2021-11-06 17:46:14,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-06 17:46:14,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:46:14,705 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:46:14,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-06 17:46:14,919 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,SelfDestructingSolverStorable10 [2021-11-06 17:46:14,919 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:46:14,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:46:14,920 INFO L85 PathProgramCache]: Analyzing trace with hash -710651366, now seen corresponding path program 2 times [2021-11-06 17:46:14,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:46:14,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586123714] [2021-11-06 17:46:14,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:14,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:46:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:15,045 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-06 17:46:15,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:46:15,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586123714] [2021-11-06 17:46:15,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586123714] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:46:15,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366479840] [2021-11-06 17:46:15,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 17:46:15,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:46:15,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:46:15,047 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 17:46:15,048 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 17:46:15,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-06 17:46:15,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 17:46:15,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 1627 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-06 17:46:15,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 17:46:15,757 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-06 17:46:15,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366479840] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:46:15,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 17:46:15,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2021-11-06 17:46:15,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873050336] [2021-11-06 17:46:15,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 17:46:15,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:46:15,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 17:46:15,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-06 17:46:15,760 INFO L87 Difference]: Start difference. First operand 985 states and 1324 transitions. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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 17:46:16,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:46:16,024 INFO L93 Difference]: Finished difference Result 2198 states and 2979 transitions. [2021-11-06 17:46:16,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 17:46:16,025 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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 140 [2021-11-06 17:46:16,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:46:16,028 INFO L225 Difference]: With dead ends: 2198 [2021-11-06 17:46:16,028 INFO L226 Difference]: Without dead ends: 1231 [2021-11-06 17:46:16,029 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-11-06 17:46:16,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2021-11-06 17:46:16,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 991. [2021-11-06 17:46:16,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 985 states have (on average 1.350253807106599) internal successors, (1330), 990 states have internal predecessors, (1330), 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 17:46:16,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1330 transitions. [2021-11-06 17:46:16,050 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1330 transitions. Word has length 140 [2021-11-06 17:46:16,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:46:16,050 INFO L470 AbstractCegarLoop]: Abstraction has 991 states and 1330 transitions. [2021-11-06 17:46:16,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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 17:46:16,050 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1330 transitions. [2021-11-06 17:46:16,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-06 17:46:16,052 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:46:16,052 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:46:16,074 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 17:46:16,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:46:16,264 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:46:16,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:46:16,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1270701829, now seen corresponding path program 1 times [2021-11-06 17:46:16,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:46:16,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758510804] [2021-11-06 17:46:16,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:16,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:46:16,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-06 17:46:16,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:46:16,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758510804] [2021-11-06 17:46:16,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758510804] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:46:16,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252295446] [2021-11-06 17:46:16,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:16,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:46:16,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:46:16,423 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 17:46:16,424 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 17:46:16,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:16,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 1993 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-06 17:46:16,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 17:46:17,247 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-06 17:46:17,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252295446] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:46:17,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 17:46:17,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-06 17:46:17,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773497509] [2021-11-06 17:46:17,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 17:46:17,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:46:17,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 17:46:17,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-06 17:46:17,249 INFO L87 Difference]: Start difference. First operand 991 states and 1330 transitions. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 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 17:46:17,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:46:17,721 INFO L93 Difference]: Finished difference Result 4692 states and 6401 transitions. [2021-11-06 17:46:17,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 17:46:17,723 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 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 17:46:17,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:46:17,732 INFO L225 Difference]: With dead ends: 4692 [2021-11-06 17:46:17,733 INFO L226 Difference]: Without dead ends: 3719 [2021-11-06 17:46:17,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 141 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 17:46:17,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2021-11-06 17:46:17,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 1075. [2021-11-06 17:46:17,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1075 states, 1069 states have (on average 1.3451824134705332) internal successors, (1438), 1074 states have internal predecessors, (1438), 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 17:46:17,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 1438 transitions. [2021-11-06 17:46:17,766 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 1438 transitions. Word has length 141 [2021-11-06 17:46:17,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:46:17,766 INFO L470 AbstractCegarLoop]: Abstraction has 1075 states and 1438 transitions. [2021-11-06 17:46:17,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 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 17:46:17,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 1438 transitions. [2021-11-06 17:46:17,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-06 17:46:17,769 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:46:17,769 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2021-11-06 17:46:17,789 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 17:46:17,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:46:17,989 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:46:17,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:46:17,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1491551852, now seen corresponding path program 2 times [2021-11-06 17:46:17,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:46:17,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694975101] [2021-11-06 17:46:17,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:17,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:46:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-06 17:46:18,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:46:18,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694975101] [2021-11-06 17:46:18,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694975101] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:46:18,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942461266] [2021-11-06 17:46:18,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 17:46:18,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:46:18,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:46:18,171 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 17:46:18,172 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 17:46:19,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-06 17:46:19,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 17:46:19,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 1648 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-06 17:46:19,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 17:46:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-06 17:46:19,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942461266] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:46:19,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 17:46:19,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-11-06 17:46:19,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66298903] [2021-11-06 17:46:19,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 17:46:19,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:46:19,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 17:46:19,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-06 17:46:19,581 INFO L87 Difference]: Start difference. First operand 1075 states and 1438 transitions. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 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 17:46:19,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:46:19,806 INFO L93 Difference]: Finished difference Result 3303 states and 4444 transitions. [2021-11-06 17:46:19,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 17:46:19,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 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 17:46:19,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:46:19,813 INFO L225 Difference]: With dead ends: 3303 [2021-11-06 17:46:19,813 INFO L226 Difference]: Without dead ends: 2246 [2021-11-06 17:46:19,814 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-06 17:46:19,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-11-06 17:46:19,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 1081. [2021-11-06 17:46:19,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1075 states have (on average 1.3432558139534885) internal successors, (1444), 1080 states have internal predecessors, (1444), 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 17:46:19,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1444 transitions. [2021-11-06 17:46:19,838 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1444 transitions. Word has length 145 [2021-11-06 17:46:19,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:46:19,839 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 1444 transitions. [2021-11-06 17:46:19,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 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 17:46:19,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1444 transitions. [2021-11-06 17:46:19,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-06 17:46:19,841 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:46:19,841 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2021-11-06 17:46:19,866 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 17:46:20,059 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,SelfDestructingSolverStorable13 [2021-11-06 17:46:20,059 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:46:20,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:46:20,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1244548351, now seen corresponding path program 1 times [2021-11-06 17:46:20,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:46:20,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559095841] [2021-11-06 17:46:20,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:20,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:46:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:20,204 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-06 17:46:20,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:46:20,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559095841] [2021-11-06 17:46:20,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559095841] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:46:20,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133591012] [2021-11-06 17:46:20,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:20,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:46:20,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:46:20,206 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 17:46:20,207 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 17:46:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:20,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 2024 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-06 17:46:20,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 17:46:21,029 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-06 17:46:21,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133591012] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:46:21,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 17:46:21,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-06 17:46:21,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148141534] [2021-11-06 17:46:21,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 17:46:21,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:46:21,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 17:46:21,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-06 17:46:21,031 INFO L87 Difference]: Start difference. First operand 1081 states and 1444 transitions. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 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 17:46:21,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:46:21,609 INFO L93 Difference]: Finished difference Result 5461 states and 7438 transitions. [2021-11-06 17:46:21,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 17:46:21,612 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 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 146 [2021-11-06 17:46:21,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:46:21,624 INFO L225 Difference]: With dead ends: 5461 [2021-11-06 17:46:21,625 INFO L226 Difference]: Without dead ends: 4398 [2021-11-06 17:46:21,628 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-06 17:46:21,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4398 states. [2021-11-06 17:46:21,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4398 to 1165. [2021-11-06 17:46:21,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1159 states have (on average 1.3390854184641934) internal successors, (1552), 1164 states have internal predecessors, (1552), 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 17:46:21,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 1552 transitions. [2021-11-06 17:46:21,664 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 1552 transitions. Word has length 146 [2021-11-06 17:46:21,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:46:21,664 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 1552 transitions. [2021-11-06 17:46:21,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 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 17:46:21,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 1552 transitions. [2021-11-06 17:46:21,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-06 17:46:21,666 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:46:21,666 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-06 17:46:21,693 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 17:46:21,883 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,SelfDestructingSolverStorable14 [2021-11-06 17:46:21,883 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:46:21,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:46:21,884 INFO L85 PathProgramCache]: Analyzing trace with hash -947469416, now seen corresponding path program 2 times [2021-11-06 17:46:21,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:46:21,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392000448] [2021-11-06 17:46:21,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:21,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:46:21,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:21,974 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-06 17:46:21,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:46:21,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392000448] [2021-11-06 17:46:21,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392000448] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:46:21,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:46:21,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 17:46:21,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986543155] [2021-11-06 17:46:21,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 17:46:21,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:46:21,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 17:46:21,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 17:46:21,976 INFO L87 Difference]: Start difference. First operand 1165 states and 1552 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 17:46:22,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:46:22,000 INFO L93 Difference]: Finished difference Result 2316 states and 3087 transitions. [2021-11-06 17:46:22,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 17:46:22,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 17:46:22,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:46:22,004 INFO L225 Difference]: With dead ends: 2316 [2021-11-06 17:46:22,004 INFO L226 Difference]: Without dead ends: 1169 [2021-11-06 17:46:22,005 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 17:46:22,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-11-06 17:46:22,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1169. [2021-11-06 17:46:22,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1163 states have (on average 1.3379191745485812) internal successors, (1556), 1168 states have internal predecessors, (1556), 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 17:46:22,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 1556 transitions. [2021-11-06 17:46:22,051 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 1556 transitions. Word has length 150 [2021-11-06 17:46:22,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:46:22,051 INFO L470 AbstractCegarLoop]: Abstraction has 1169 states and 1556 transitions. [2021-11-06 17:46:22,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 17:46:22,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 1556 transitions. [2021-11-06 17:46:22,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-06 17:46:22,055 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:46:22,055 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:46:22,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-06 17:46:22,055 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:46:22,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:46:22,056 INFO L85 PathProgramCache]: Analyzing trace with hash -720066253, now seen corresponding path program 1 times [2021-11-06 17:46:22,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:46:22,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640021451] [2021-11-06 17:46:22,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:22,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:46:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-06 17:46:22,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:46:22,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640021451] [2021-11-06 17:46:22,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640021451] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:46:22,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369577389] [2021-11-06 17:46:22,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:22,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:46:22,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:46:22,182 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 17:46:22,183 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 17:46:23,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:23,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 2041 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-06 17:46:23,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 17:46:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-06 17:46:23,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369577389] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:46:23,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 17:46:23,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-06 17:46:23,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76773790] [2021-11-06 17:46:23,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 17:46:23,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:46:23,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 17:46:23,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-06 17:46:23,709 INFO L87 Difference]: Start difference. First operand 1169 states and 1556 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 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 17:46:23,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:46:23,971 INFO L93 Difference]: Finished difference Result 3437 states and 4612 transitions. [2021-11-06 17:46:23,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 17:46:23,972 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 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 152 [2021-11-06 17:46:23,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:46:23,976 INFO L225 Difference]: With dead ends: 3437 [2021-11-06 17:46:23,976 INFO L226 Difference]: Without dead ends: 2286 [2021-11-06 17:46:23,978 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-06 17:46:23,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2021-11-06 17:46:24,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 1175. [2021-11-06 17:46:24,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 1169 states have (on average 1.3361847733105219) internal successors, (1562), 1174 states have internal predecessors, (1562), 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 17:46:24,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 1562 transitions. [2021-11-06 17:46:24,010 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 1562 transitions. Word has length 152 [2021-11-06 17:46:24,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:46:24,010 INFO L470 AbstractCegarLoop]: Abstraction has 1175 states and 1562 transitions. [2021-11-06 17:46:24,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 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 17:46:24,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 1562 transitions. [2021-11-06 17:46:24,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-06 17:46:24,012 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:46:24,012 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:46:24,037 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 17:46:24,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:46:24,227 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:46:24,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:46:24,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1077379303, now seen corresponding path program 1 times [2021-11-06 17:46:24,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:46:24,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398069567] [2021-11-06 17:46:24,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:24,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:46:24,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:24,373 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-06 17:46:24,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:46:24,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398069567] [2021-11-06 17:46:24,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398069567] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:46:24,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460009214] [2021-11-06 17:46:24,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:24,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:46:24,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:46:24,375 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 17:46:24,377 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 17:46:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:25,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 2062 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-06 17:46:25,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 17:46:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-06 17:46:25,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460009214] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:46:25,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 17:46:25,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-06 17:46:25,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308769906] [2021-11-06 17:46:25,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 17:46:25,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:46:25,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 17:46:25,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-06 17:46:25,870 INFO L87 Difference]: Start difference. First operand 1175 states and 1562 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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 17:46:25,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:46:25,968 INFO L93 Difference]: Finished difference Result 2674 states and 3585 transitions. [2021-11-06 17:46:25,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 17:46:25,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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 153 [2021-11-06 17:46:25,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:46:25,971 INFO L225 Difference]: With dead ends: 2674 [2021-11-06 17:46:25,972 INFO L226 Difference]: Without dead ends: 1517 [2021-11-06 17:46:25,973 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-06 17:46:25,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2021-11-06 17:46:25,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1179. [2021-11-06 17:46:25,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1173 states have (on average 1.3350383631713556) internal successors, (1566), 1178 states have internal predecessors, (1566), 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 17:46:25,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1566 transitions. [2021-11-06 17:46:25,997 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1566 transitions. Word has length 153 [2021-11-06 17:46:25,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:46:25,997 INFO L470 AbstractCegarLoop]: Abstraction has 1179 states and 1566 transitions. [2021-11-06 17:46:25,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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 17:46:25,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1566 transitions. [2021-11-06 17:46:26,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-06 17:46:26,000 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:46:26,000 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:46:26,026 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 17:46:26,215 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,SelfDestructingSolverStorable17 [2021-11-06 17:46:26,215 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:46:26,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:46:26,216 INFO L85 PathProgramCache]: Analyzing trace with hash -572264394, now seen corresponding path program 1 times [2021-11-06 17:46:26,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:46:26,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909236889] [2021-11-06 17:46:26,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:26,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:46:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-06 17:46:26,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:46:26,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909236889] [2021-11-06 17:46:26,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909236889] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:46:26,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654791545] [2021-11-06 17:46:26,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:26,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:46:26,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:46:26,340 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 17:46:26,341 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 17:46:27,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:27,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 2076 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-06 17:46:27,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 17:46:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-06 17:46:28,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654791545] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:46:28,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 17:46:28,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-06 17:46:28,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417807972] [2021-11-06 17:46:28,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 17:46:28,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:46:28,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 17:46:28,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-06 17:46:28,137 INFO L87 Difference]: Start difference. First operand 1179 states and 1566 transitions. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 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 17:46:28,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:46:28,388 INFO L93 Difference]: Finished difference Result 3045 states and 4076 transitions. [2021-11-06 17:46:28,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 17:46:28,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 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 17:46:28,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:46:28,392 INFO L225 Difference]: With dead ends: 3045 [2021-11-06 17:46:28,392 INFO L226 Difference]: Without dead ends: 1884 [2021-11-06 17:46:28,394 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-06 17:46:28,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2021-11-06 17:46:28,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1185. [2021-11-06 17:46:28,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1179 states have (on average 1.3333333333333333) internal successors, (1572), 1184 states have internal predecessors, (1572), 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 17:46:28,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1572 transitions. [2021-11-06 17:46:28,418 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1572 transitions. Word has length 156 [2021-11-06 17:46:28,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:46:28,418 INFO L470 AbstractCegarLoop]: Abstraction has 1185 states and 1572 transitions. [2021-11-06 17:46:28,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 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 17:46:28,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1572 transitions. [2021-11-06 17:46:28,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-06 17:46:28,420 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:46:28,421 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:46:28,445 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 17:46:28,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:46:28,632 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:46:28,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:46:28,633 INFO L85 PathProgramCache]: Analyzing trace with hash -2047593680, now seen corresponding path program 1 times [2021-11-06 17:46:28,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:46:28,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994487765] [2021-11-06 17:46:28,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:28,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:46:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-06 17:46:28,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:46:28,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994487765] [2021-11-06 17:46:28,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994487765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:46:28,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683548864] [2021-11-06 17:46:28,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:28,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:46:28,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:46:28,737 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 17:46:28,755 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 17:46:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:30,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 2097 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 17:46:30,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 17:46:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-06 17:46:30,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683548864] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:46:30,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 17:46:30,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-06 17:46:30,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112773523] [2021-11-06 17:46:30,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 17:46:30,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:46:30,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 17:46:30,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 17:46:30,444 INFO L87 Difference]: Start difference. First operand 1185 states and 1572 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 17:46:30,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:46:30,485 INFO L93 Difference]: Finished difference Result 2467 states and 3288 transitions. [2021-11-06 17:46:30,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 17:46:30,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 157 [2021-11-06 17:46:30,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:46:30,488 INFO L225 Difference]: With dead ends: 2467 [2021-11-06 17:46:30,488 INFO L226 Difference]: Without dead ends: 1300 [2021-11-06 17:46:30,490 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 157 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 17:46:30,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2021-11-06 17:46:30,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1187. [2021-11-06 17:46:30,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1181 states have (on average 1.3327688399661304) internal successors, (1574), 1186 states have internal predecessors, (1574), 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 17:46:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 1574 transitions. [2021-11-06 17:46:30,516 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 1574 transitions. Word has length 157 [2021-11-06 17:46:30,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:46:30,516 INFO L470 AbstractCegarLoop]: Abstraction has 1187 states and 1574 transitions. [2021-11-06 17:46:30,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 17:46:30,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 1574 transitions. [2021-11-06 17:46:30,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-06 17:46:30,518 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:46:30,519 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:46:30,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-06 17:46:30,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:46:30,735 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:46:30,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:46:30,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1807353934, now seen corresponding path program 1 times [2021-11-06 17:46:30,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:46:30,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246635391] [2021-11-06 17:46:30,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:30,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:46:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-06 17:46:30,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:46:30,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246635391] [2021-11-06 17:46:30,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246635391] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:46:30,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080751417] [2021-11-06 17:46:30,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:30,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:46:30,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:46:30,856 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 17:46:30,857 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 17:46:32,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:32,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 2096 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-06 17:46:32,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 17:46:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-06 17:46:33,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080751417] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:46:33,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 17:46:33,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-06 17:46:33,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224662684] [2021-11-06 17:46:33,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 17:46:33,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:46:33,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 17:46:33,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 17:46:33,087 INFO L87 Difference]: Start difference. First operand 1187 states and 1574 transitions. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 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 17:46:33,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:46:33,132 INFO L93 Difference]: Finished difference Result 2360 states and 3131 transitions. [2021-11-06 17:46:33,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 17:46:33,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 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 157 [2021-11-06 17:46:33,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:46:33,134 INFO L225 Difference]: With dead ends: 2360 [2021-11-06 17:46:33,134 INFO L226 Difference]: Without dead ends: 1191 [2021-11-06 17:46:33,136 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 17:46:33,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-11-06 17:46:33,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1191. [2021-11-06 17:46:33,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1185 states have (on average 1.3316455696202532) internal successors, (1578), 1190 states have internal predecessors, (1578), 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 17:46:33,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 1578 transitions. [2021-11-06 17:46:33,158 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 1578 transitions. Word has length 157 [2021-11-06 17:46:33,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:46:33,158 INFO L470 AbstractCegarLoop]: Abstraction has 1191 states and 1578 transitions. [2021-11-06 17:46:33,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 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 17:46:33,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 1578 transitions. [2021-11-06 17:46:33,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-06 17:46:33,161 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:46:33,161 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:46:33,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-06 17:46:33,379 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,SelfDestructingSolverStorable20 [2021-11-06 17:46:33,379 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:46:33,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:46:33,380 INFO L85 PathProgramCache]: Analyzing trace with hash -258826825, now seen corresponding path program 2 times [2021-11-06 17:46:33,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:46:33,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127799571] [2021-11-06 17:46:33,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:33,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:46:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:33,510 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-06 17:46:33,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:46:33,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127799571] [2021-11-06 17:46:33,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127799571] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:46:33,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255654500] [2021-11-06 17:46:33,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 17:46:33,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:46:33,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:46:33,512 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 17:46:33,539 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 17:46:34,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-06 17:46:34,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 17:46:34,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 1724 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-06 17:46:34,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 17:46:35,064 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-06 17:46:35,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255654500] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:46:35,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 17:46:35,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-06 17:46:35,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079974773] [2021-11-06 17:46:35,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 17:46:35,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:46:35,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 17:46:35,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-06 17:46:35,066 INFO L87 Difference]: Start difference. First operand 1191 states and 1578 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 17:46:35,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:46:35,123 INFO L93 Difference]: Finished difference Result 2378 states and 3153 transitions. [2021-11-06 17:46:35,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 17:46:35,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 159 [2021-11-06 17:46:35,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:46:35,126 INFO L225 Difference]: With dead ends: 2378 [2021-11-06 17:46:35,126 INFO L226 Difference]: Without dead ends: 1194 [2021-11-06 17:46:35,127 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-06 17:46:35,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-11-06 17:46:35,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1194. [2021-11-06 17:46:35,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1188 states have (on average 1.3308080808080809) internal successors, (1581), 1193 states have internal predecessors, (1581), 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 17:46:35,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1581 transitions. [2021-11-06 17:46:35,148 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1581 transitions. Word has length 159 [2021-11-06 17:46:35,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:46:35,149 INFO L470 AbstractCegarLoop]: Abstraction has 1194 states and 1581 transitions. [2021-11-06 17:46:35,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 17:46:35,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1581 transitions. [2021-11-06 17:46:35,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-06 17:46:35,151 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:46:35,151 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:46:35,189 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 17:46:35,363 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,SelfDestructingSolverStorable21 [2021-11-06 17:46:35,363 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:46:35,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:46:35,364 INFO L85 PathProgramCache]: Analyzing trace with hash -858185383, now seen corresponding path program 1 times [2021-11-06 17:46:35,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:46:35,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321800041] [2021-11-06 17:46:35,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:35,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:46:35,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-06 17:46:35,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:46:35,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321800041] [2021-11-06 17:46:35,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321800041] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:46:35,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947537620] [2021-11-06 17:46:35,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:35,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:46:35,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:46:35,494 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 17:46:35,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-06 17:46:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:38,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 2121 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-06 17:46:38,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 17:46:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-06 17:46:38,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947537620] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:46:38,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 17:46:38,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-06 17:46:38,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7989582] [2021-11-06 17:46:38,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 17:46:38,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:46:38,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 17:46:38,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-06 17:46:38,650 INFO L87 Difference]: Start difference. First operand 1194 states and 1581 transitions. Second operand has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 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 17:46:38,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:46:38,700 INFO L93 Difference]: Finished difference Result 2371 states and 3142 transitions. [2021-11-06 17:46:38,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 17:46:38,701 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 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 162 [2021-11-06 17:46:38,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:46:38,703 INFO L225 Difference]: With dead ends: 2371 [2021-11-06 17:46:38,703 INFO L226 Difference]: Without dead ends: 1198 [2021-11-06 17:46:38,704 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-06 17:46:38,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2021-11-06 17:46:38,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1198. [2021-11-06 17:46:38,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1192 states have (on average 1.3296979865771812) internal successors, (1585), 1197 states have internal predecessors, (1585), 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 17:46:38,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1585 transitions. [2021-11-06 17:46:38,731 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1585 transitions. Word has length 162 [2021-11-06 17:46:38,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:46:38,731 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 1585 transitions. [2021-11-06 17:46:38,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 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 17:46:38,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1585 transitions. [2021-11-06 17:46:38,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-06 17:46:38,734 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:46:38,734 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 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] [2021-11-06 17:46:38,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-06 17:46:38,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-06 17:46:38,950 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:46:38,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:46:38,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1359083934, now seen corresponding path program 2 times [2021-11-06 17:46:38,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:46:38,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053115179] [2021-11-06 17:46:38,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:38,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:46:39,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-06 17:46:39,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:46:39,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053115179] [2021-11-06 17:46:39,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053115179] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:46:39,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194805006] [2021-11-06 17:46:39,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 17:46:39,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:46:39,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:46:39,072 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 17:46:39,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-06 17:46:40,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-06 17:46:40,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 17:46:40,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 1724 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-06 17:46:40,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 17:46:40,804 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-06 17:46:40,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194805006] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:46:40,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 17:46:40,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-06 17:46:40,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661037388] [2021-11-06 17:46:40,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 17:46:40,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:46:40,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 17:46:40,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-06 17:46:40,805 INFO L87 Difference]: Start difference. First operand 1198 states and 1585 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 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 17:46:40,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:46:40,851 INFO L93 Difference]: Finished difference Result 2394 states and 3169 transitions. [2021-11-06 17:46:40,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 17:46:40,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 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 164 [2021-11-06 17:46:40,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:46:40,854 INFO L225 Difference]: With dead ends: 2394 [2021-11-06 17:46:40,854 INFO L226 Difference]: Without dead ends: 1200 [2021-11-06 17:46:40,855 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-06 17:46:40,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-11-06 17:46:40,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1200. [2021-11-06 17:46:40,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1194 states have (on average 1.329145728643216) internal successors, (1587), 1199 states have internal predecessors, (1587), 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 17:46:40,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1587 transitions. [2021-11-06 17:46:40,879 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1587 transitions. Word has length 164 [2021-11-06 17:46:40,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:46:40,879 INFO L470 AbstractCegarLoop]: Abstraction has 1200 states and 1587 transitions. [2021-11-06 17:46:40,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 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 17:46:40,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1587 transitions. [2021-11-06 17:46:40,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-06 17:46:40,881 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:46:40,882 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 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] [2021-11-06 17:46:40,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-06 17:46:41,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:46:41,095 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:46:41,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:46:41,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1468522778, now seen corresponding path program 1 times [2021-11-06 17:46:41,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:46:41,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370029006] [2021-11-06 17:46:41,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:41,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:46:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-06 17:46:41,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:46:41,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370029006] [2021-11-06 17:46:41,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370029006] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:46:41,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59352453] [2021-11-06 17:46:41,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:41,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:46:41,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:46:41,229 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 17:46:41,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-06 17:46:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:43,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 2140 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-06 17:46:43,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 17:46:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-06 17:46:43,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59352453] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:46:43,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 17:46:43,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-11-06 17:46:43,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230374343] [2021-11-06 17:46:43,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 17:46:43,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:46:43,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 17:46:43,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-06 17:46:43,665 INFO L87 Difference]: Start difference. First operand 1200 states and 1587 transitions. Second operand has 8 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 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 17:46:43,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:46:43,768 INFO L93 Difference]: Finished difference Result 2401 states and 3178 transitions. [2021-11-06 17:46:43,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-06 17:46:43,768 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 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 17:46:43,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:46:43,770 INFO L225 Difference]: With dead ends: 2401 [2021-11-06 17:46:43,770 INFO L226 Difference]: Without dead ends: 1206 [2021-11-06 17:46:43,772 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-06 17:46:43,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-11-06 17:46:43,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1206. [2021-11-06 17:46:43,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1200 states have (on average 1.3275) internal successors, (1593), 1205 states have internal predecessors, (1593), 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 17:46:43,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 1593 transitions. [2021-11-06 17:46:43,793 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 1593 transitions. Word has length 166 [2021-11-06 17:46:43,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:46:43,793 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 1593 transitions. [2021-11-06 17:46:43,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 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 17:46:43,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 1593 transitions. [2021-11-06 17:46:43,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-06 17:46:43,795 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:46:43,795 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 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] [2021-11-06 17:46:43,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-06 17:46:44,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:46:44,019 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:46:44,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:46:44,020 INFO L85 PathProgramCache]: Analyzing trace with hash 918543395, now seen corresponding path program 2 times [2021-11-06 17:46:44,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:46:44,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555196709] [2021-11-06 17:46:44,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:46:44,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:46:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:46:44,182 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-06 17:46:44,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:46:44,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555196709] [2021-11-06 17:46:44,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555196709] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:46:44,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567566003] [2021-11-06 17:46:44,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 17:46:44,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:46:44,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:46:44,184 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 17:46:44,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-06 17:47:10,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 17:47:10,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 17:47:10,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 2159 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-06 17:47:10,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 17:47:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-06 17:47:10,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567566003] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:47:10,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 17:47:10,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-11-06 17:47:10,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910061685] [2021-11-06 17:47:10,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-06 17:47:10,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:47:10,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-06 17:47:10,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-06 17:47:10,553 INFO L87 Difference]: Start difference. First operand 1206 states and 1593 transitions. Second operand has 10 states, 10 states have (on average 21.1) internal successors, (211), 10 states have internal predecessors, (211), 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 17:47:10,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:47:10,699 INFO L93 Difference]: Finished difference Result 2412 states and 3189 transitions. [2021-11-06 17:47:10,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-06 17:47:10,700 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 21.1) internal successors, (211), 10 states have internal predecessors, (211), 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 170 [2021-11-06 17:47:10,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:47:10,701 INFO L225 Difference]: With dead ends: 2412 [2021-11-06 17:47:10,701 INFO L226 Difference]: Without dead ends: 1212 [2021-11-06 17:47:10,702 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-06 17:47:10,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-11-06 17:47:10,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1212. [2021-11-06 17:47:10,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1206 states have (on average 1.3258706467661692) internal successors, (1599), 1211 states have internal predecessors, (1599), 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 17:47:10,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1599 transitions. [2021-11-06 17:47:10,731 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1599 transitions. Word has length 170 [2021-11-06 17:47:10,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:47:10,731 INFO L470 AbstractCegarLoop]: Abstraction has 1212 states and 1599 transitions. [2021-11-06 17:47:10,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.1) internal successors, (211), 10 states have internal predecessors, (211), 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 17:47:10,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1599 transitions. [2021-11-06 17:47:10,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-06 17:47:10,734 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:47:10,734 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 3, 3, 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] [2021-11-06 17:47:10,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-06 17:47:10,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-06 17:47:10,944 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:47:10,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:47:10,944 INFO L85 PathProgramCache]: Analyzing trace with hash -358192848, now seen corresponding path program 3 times [2021-11-06 17:47:10,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:47:10,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860481957] [2021-11-06 17:47:10,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:47:10,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:47:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:47:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-06 17:47:11,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:47:11,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860481957] [2021-11-06 17:47:11,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860481957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:47:11,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931339830] [2021-11-06 17:47:11,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 17:47:11,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:47:11,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:47:11,091 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 17:47:11,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-06 17:47:36,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-06 17:47:36,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 17:47:36,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 1892 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-06 17:47:36,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 17:47:36,595 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-06 17:47:36,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931339830] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:47:36,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 17:47:36,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2021-11-06 17:47:36,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491976278] [2021-11-06 17:47:36,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-06 17:47:36,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:47:36,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-06 17:47:36,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-06 17:47:36,597 INFO L87 Difference]: Start difference. First operand 1212 states and 1599 transitions. Second operand has 10 states, 10 states have (on average 20.8) internal successors, (208), 10 states have internal predecessors, (208), 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 17:47:36,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:47:36,737 INFO L93 Difference]: Finished difference Result 2420 states and 3197 transitions. [2021-11-06 17:47:36,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-06 17:47:36,737 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.8) internal successors, (208), 10 states have internal predecessors, (208), 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 174 [2021-11-06 17:47:36,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:47:36,739 INFO L225 Difference]: With dead ends: 2420 [2021-11-06 17:47:36,739 INFO L226 Difference]: Without dead ends: 1219 [2021-11-06 17:47:36,740 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-06 17:47:36,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-11-06 17:47:36,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1219. [2021-11-06 17:47:36,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1213 states have (on average 1.3239901071723001) internal successors, (1606), 1218 states have internal predecessors, (1606), 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 17:47:36,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 1606 transitions. [2021-11-06 17:47:36,761 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 1606 transitions. Word has length 174 [2021-11-06 17:47:36,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:47:36,761 INFO L470 AbstractCegarLoop]: Abstraction has 1219 states and 1606 transitions. [2021-11-06 17:47:36,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.8) internal successors, (208), 10 states have internal predecessors, (208), 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 17:47:36,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 1606 transitions. [2021-11-06 17:47:36,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-06 17:47:36,764 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:47:36,764 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 5, 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] [2021-11-06 17:47:36,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-06 17:47:36,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-06 17:47:36,979 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:47:36,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:47:36,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1293148107, now seen corresponding path program 4 times [2021-11-06 17:47:36,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:47:36,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851839856] [2021-11-06 17:47:36,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:47:36,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:47:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:47:37,155 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-06 17:47:37,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:47:37,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851839856] [2021-11-06 17:47:37,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851839856] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:47:37,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651023019] [2021-11-06 17:47:37,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-06 17:47:37,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:47:37,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:47:37,159 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 17:47:37,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-06 17:47:41,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-06 17:47:41,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 17:47:41,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 2203 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-06 17:47:41,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 17:47:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-06 17:47:41,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651023019] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:47:41,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 17:47:41,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-11-06 17:47:41,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130756498] [2021-11-06 17:47:41,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-06 17:47:41,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:47:41,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-06 17:47:41,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-06 17:47:41,967 INFO L87 Difference]: Start difference. First operand 1219 states and 1606 transitions. Second operand has 15 states, 15 states have (on average 14.333333333333334) internal successors, (215), 15 states have internal predecessors, (215), 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 17:47:42,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:47:42,229 INFO L93 Difference]: Finished difference Result 2433 states and 3210 transitions. [2021-11-06 17:47:42,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-06 17:47:42,229 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 14.333333333333334) internal successors, (215), 15 states have internal predecessors, (215), 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 179 [2021-11-06 17:47:42,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:47:42,231 INFO L225 Difference]: With dead ends: 2433 [2021-11-06 17:47:42,231 INFO L226 Difference]: Without dead ends: 1226 [2021-11-06 17:47:42,232 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-06 17:47:42,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2021-11-06 17:47:42,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 1226. [2021-11-06 17:47:42,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1220 states have (on average 1.3221311475409836) internal successors, (1613), 1225 states have internal predecessors, (1613), 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 17:47:42,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1613 transitions. [2021-11-06 17:47:42,252 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1613 transitions. Word has length 179 [2021-11-06 17:47:42,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:47:42,252 INFO L470 AbstractCegarLoop]: Abstraction has 1226 states and 1613 transitions. [2021-11-06 17:47:42,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 14.333333333333334) internal successors, (215), 15 states have internal predecessors, (215), 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 17:47:42,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1613 transitions. [2021-11-06 17:47:42,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-06 17:47:42,255 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:47:42,255 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 5, 4, 3, 3, 3, 3, 3, 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] [2021-11-06 17:47:42,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-06 17:47:42,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-06 17:47:42,463 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 17:47:42,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:47:42,464 INFO L85 PathProgramCache]: Analyzing trace with hash 2072287546, now seen corresponding path program 5 times [2021-11-06 17:47:42,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:47:42,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648856213] [2021-11-06 17:47:42,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:47:42,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:47:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:47:42,634 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-06 17:47:42,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:47:42,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648856213] [2021-11-06 17:47:42,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648856213] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:47:42,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096370791] [2021-11-06 17:47:42,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-06 17:47:42,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:47:42,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:47:42,636 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 17:47:42,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process Killed by 15