./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5f08f0f0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.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 f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5f08f0f [2021-11-05 16:40:05,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-05 16:40:05,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-05 16:40:05,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-05 16:40:05,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-05 16:40:05,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-05 16:40:05,051 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-05 16:40:05,052 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-05 16:40:05,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-05 16:40:05,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-05 16:40:05,054 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-05 16:40:05,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-05 16:40:05,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-05 16:40:05,056 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-05 16:40:05,057 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-05 16:40:05,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-05 16:40:05,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-05 16:40:05,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-05 16:40:05,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-05 16:40:05,064 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-05 16:40:05,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-05 16:40:05,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-05 16:40:05,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-05 16:40:05,067 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-05 16:40:05,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-05 16:40:05,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-05 16:40:05,069 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-05 16:40:05,070 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-05 16:40:05,070 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-05 16:40:05,071 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-05 16:40:05,071 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-05 16:40:05,071 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-05 16:40:05,072 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-05 16:40:05,072 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-05 16:40:05,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-05 16:40:05,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-05 16:40:05,074 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-05 16:40:05,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-05 16:40:05,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-05 16:40:05,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-05 16:40:05,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-05 16:40:05,079 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-05 16:40:05,109 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-05 16:40:05,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-05 16:40:05,110 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-05 16:40:05,110 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-05 16:40:05,112 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-05 16:40:05,112 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-05 16:40:05,112 INFO L138 SettingsManager]: * Use SBE=true [2021-11-05 16:40:05,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-05 16:40:05,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-05 16:40:05,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-05 16:40:05,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-05 16:40:05,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-05 16:40:05,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-05 16:40:05,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-05 16:40:05,114 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-05 16:40:05,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-05 16:40:05,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-05 16:40:05,114 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-05 16:40:05,114 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-05 16:40:05,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 16:40:05,115 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-05 16:40:05,115 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-05 16:40:05,115 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-05 16:40:05,115 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-05 16:40:05,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-05 16:40:05,115 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-05 16:40:05,115 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-05 16:40:05,116 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-05 16:40:05,116 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-05 16:40:05,116 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b [2021-11-05 16:40:05,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-05 16:40:05,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-05 16:40:05,402 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-05 16:40:05,403 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-05 16:40:05,404 INFO L275 PluginConnector]: CDTParser initialized [2021-11-05 16:40:05,405 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-05 16:40:05,469 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9a32d974/fbc7db52d53a4607827099b78d1e25ec/FLAGa0f45eb5a [2021-11-05 16:40:06,034 INFO L306 CDTParser]: Found 1 translation units. [2021-11-05 16:40:06,035 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-05 16:40:06,062 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9a32d974/fbc7db52d53a4607827099b78d1e25ec/FLAGa0f45eb5a [2021-11-05 16:40:06,504 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9a32d974/fbc7db52d53a4607827099b78d1e25ec [2021-11-05 16:40:06,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-05 16:40:06,509 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-05 16:40:06,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-05 16:40:06,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-05 16:40:06,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-05 16:40:06,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 04:40:06" (1/1) ... [2021-11-05 16:40:06,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a51cf10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:40:06, skipping insertion in model container [2021-11-05 16:40:06,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 04:40:06" (1/1) ... [2021-11-05 16:40:06,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-05 16:40:06,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-05 16:40:07,289 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-11-05 16:40:07,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 16:40:07,572 INFO L203 MainTranslator]: Completed pre-run [2021-11-05 16:40:07,670 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-11-05 16:40:07,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 16:40:07,840 INFO L208 MainTranslator]: Completed translation [2021-11-05 16:40:07,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:40:07 WrapperNode [2021-11-05 16:40:07,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-05 16:40:07,842 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-05 16:40:07,842 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-05 16:40:07,843 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-05 16:40:07,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:40:07" (1/1) ... [2021-11-05 16:40:07,899 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:40:07" (1/1) ... [2021-11-05 16:40:08,033 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-05 16:40:08,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-05 16:40:08,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-05 16:40:08,035 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-05 16:40:08,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:40:07" (1/1) ... [2021-11-05 16:40:08,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:40:07" (1/1) ... [2021-11-05 16:40:08,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:40:07" (1/1) ... [2021-11-05 16:40:08,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:40:07" (1/1) ... [2021-11-05 16:40:08,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:40:07" (1/1) ... [2021-11-05 16:40:08,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:40:07" (1/1) ... [2021-11-05 16:40:08,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:40:07" (1/1) ... [2021-11-05 16:40:08,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-05 16:40:08,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-05 16:40:08,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-05 16:40:08,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-05 16:40:08,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:40:07" (1/1) ... [2021-11-05 16:40:08,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 16:40:08,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:40:08,206 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) [2021-11-05 16:40:08,218 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 [2021-11-05 16:40:08,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-05 16:40:08,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-05 16:40:08,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-05 16:40:08,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-05 16:40:08,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-05 16:40:08,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-05 16:40:08,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-05 16:40:08,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-05 16:40:08,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-05 16:40:08,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-05 16:40:08,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-05 16:40:08,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-05 16:40:08,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-05 16:40:08,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-05 16:40:08,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-05 16:40:12,384 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-05 16:40:12,385 INFO L299 CfgBuilder]: Removed 769 assume(true) statements. [2021-11-05 16:40:12,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 04:40:12 BoogieIcfgContainer [2021-11-05 16:40:12,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-05 16:40:12,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-05 16:40:12,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-05 16:40:12,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-05 16:40:12,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.11 04:40:06" (1/3) ... [2021-11-05 16:40:12,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6635dbaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 04:40:12, skipping insertion in model container [2021-11-05 16:40:12,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:40:07" (2/3) ... [2021-11-05 16:40:12,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6635dbaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 04:40:12, skipping insertion in model container [2021-11-05 16:40:12,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 04:40:12" (3/3) ... [2021-11-05 16:40:12,395 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-05 16:40:12,399 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-05 16:40:12,399 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-05 16:40:12,444 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-05 16:40:12,449 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 [2021-11-05 16:40:12,449 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-05 16:40:12,470 INFO L276 IsEmpty]: Start isEmpty. Operand has 898 states, 896 states have (on average 1.5290178571428572) internal successors, (1370), 897 states have internal predecessors, (1370), 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) [2021-11-05 16:40:12,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-05 16:40:12,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:40:12,477 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:40:12,477 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:40:12,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:40:12,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1898451720, now seen corresponding path program 1 times [2021-11-05 16:40:12,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:40:12,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78988290] [2021-11-05 16:40:12,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:40:12,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:40:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:40:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:40:12,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:40:12,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78988290] [2021-11-05 16:40:12,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78988290] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:40:12,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:40:12,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:40:12,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515646643] [2021-11-05 16:40:12,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:40:12,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:40:12,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:40:12,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:40:12,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:40:12,841 INFO L87 Difference]: Start difference. First operand has 898 states, 896 states have (on average 1.5290178571428572) internal successors, (1370), 897 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:40:13,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:40:13,035 INFO L93 Difference]: Finished difference Result 2608 states and 3995 transitions. [2021-11-05 16:40:13,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:40:13,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-05 16:40:13,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:40:13,058 INFO L225 Difference]: With dead ends: 2608 [2021-11-05 16:40:13,059 INFO L226 Difference]: Without dead ends: 1703 [2021-11-05 16:40:13,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.05ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:40:13,073 INFO L933 BasicCegarLoop]: 1300 mSDtfsCounter, 1205 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 2586 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.68ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.74ms IncrementalHoareTripleChecker+Time [2021-11-05 16:40:13,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1205 Valid, 2586 Invalid, 15 Unknown, 0 Unchecked, 15.68ms Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 53.74ms Time] [2021-11-05 16:40:13,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-11-05 16:40:13,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1703. [2021-11-05 16:40:13,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 1.4618096357226793) internal successors, (2488), 1702 states have internal predecessors, (2488), 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) [2021-11-05 16:40:13,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 2488 transitions. [2021-11-05 16:40:13,177 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 2488 transitions. Word has length 36 [2021-11-05 16:40:13,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:40:13,178 INFO L470 AbstractCegarLoop]: Abstraction has 1703 states and 2488 transitions. [2021-11-05 16:40:13,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:40:13,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 2488 transitions. [2021-11-05 16:40:13,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-05 16:40:13,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:40:13,181 INFO L514 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] [2021-11-05 16:40:13,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-05 16:40:13,181 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:40:13,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:40:13,182 INFO L85 PathProgramCache]: Analyzing trace with hash 331004688, now seen corresponding path program 1 times [2021-11-05 16:40:13,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:40:13,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345901292] [2021-11-05 16:40:13,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:40:13,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:40:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:40:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:40:13,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:40:13,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345901292] [2021-11-05 16:40:13,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345901292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:40:13,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:40:13,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-05 16:40:13,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918623781] [2021-11-05 16:40:13,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:40:13,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-05 16:40:13,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:40:13,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-05 16:40:13,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:40:13,290 INFO L87 Difference]: Start difference. First operand 1703 states and 2488 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2021-11-05 16:40:13,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:40:13,539 INFO L93 Difference]: Finished difference Result 5001 states and 7337 transitions. [2021-11-05 16:40:13,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 16:40:13,540 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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 40 [2021-11-05 16:40:13,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:40:13,552 INFO L225 Difference]: With dead ends: 5001 [2021-11-05 16:40:13,552 INFO L226 Difference]: Without dead ends: 3345 [2021-11-05 16:40:13,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.30ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-05 16:40:13,559 INFO L933 BasicCegarLoop]: 1227 mSDtfsCounter, 1260 mSDsluCounter, 3616 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 128.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1260 SdHoareTripleChecker+Valid, 4843 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.15ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 162.79ms IncrementalHoareTripleChecker+Time [2021-11-05 16:40:13,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1260 Valid, 4843 Invalid, 263 Unknown, 0 Unchecked, 6.15ms Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 162.79ms Time] [2021-11-05 16:40:13,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3345 states. [2021-11-05 16:40:13,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3345 to 3249. [2021-11-05 16:40:13,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3249 states, 3248 states have (on average 1.4716748768472907) internal successors, (4780), 3248 states have internal predecessors, (4780), 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) [2021-11-05 16:40:13,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3249 states to 3249 states and 4780 transitions. [2021-11-05 16:40:13,674 INFO L78 Accepts]: Start accepts. Automaton has 3249 states and 4780 transitions. Word has length 40 [2021-11-05 16:40:13,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:40:13,675 INFO L470 AbstractCegarLoop]: Abstraction has 3249 states and 4780 transitions. [2021-11-05 16:40:13,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2021-11-05 16:40:13,676 INFO L276 IsEmpty]: Start isEmpty. Operand 3249 states and 4780 transitions. [2021-11-05 16:40:13,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-05 16:40:13,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:40:13,686 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:40:13,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-05 16:40:13,686 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:40:13,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:40:13,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1564766953, now seen corresponding path program 1 times [2021-11-05 16:40:13,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:40:13,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526971007] [2021-11-05 16:40:13,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:40:13,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:40:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:40:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:40:13,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:40:13,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526971007] [2021-11-05 16:40:13,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526971007] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:40:13,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:40:13,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:40:13,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831417662] [2021-11-05 16:40:13,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:40:13,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:40:13,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:40:13,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:40:13,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:40:13,771 INFO L87 Difference]: Start difference. First operand 3249 states and 4780 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2021-11-05 16:40:13,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:40:13,887 INFO L93 Difference]: Finished difference Result 7909 states and 11681 transitions. [2021-11-05 16:40:13,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:40:13,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 69 [2021-11-05 16:40:13,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:40:13,903 INFO L225 Difference]: With dead ends: 7909 [2021-11-05 16:40:13,903 INFO L226 Difference]: Without dead ends: 4713 [2021-11-05 16:40:13,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.50ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:40:13,913 INFO L933 BasicCegarLoop]: 1297 mSDtfsCounter, 629 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 2486 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.94ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.78ms IncrementalHoareTripleChecker+Time [2021-11-05 16:40:13,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [629 Valid, 2486 Invalid, 41 Unknown, 0 Unchecked, 2.94ms Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 37.78ms Time] [2021-11-05 16:40:13,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4713 states. [2021-11-05 16:40:14,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4713 to 4693. [2021-11-05 16:40:14,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4693 states, 4692 states have (on average 1.4786871270247228) internal successors, (6938), 4692 states have internal predecessors, (6938), 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) [2021-11-05 16:40:14,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4693 states to 4693 states and 6938 transitions. [2021-11-05 16:40:14,048 INFO L78 Accepts]: Start accepts. Automaton has 4693 states and 6938 transitions. Word has length 69 [2021-11-05 16:40:14,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:40:14,048 INFO L470 AbstractCegarLoop]: Abstraction has 4693 states and 6938 transitions. [2021-11-05 16:40:14,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2021-11-05 16:40:14,049 INFO L276 IsEmpty]: Start isEmpty. Operand 4693 states and 6938 transitions. [2021-11-05 16:40:14,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-05 16:40:14,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:40:14,052 INFO L514 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] [2021-11-05 16:40:14,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-05 16:40:14,053 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:40:14,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:40:14,053 INFO L85 PathProgramCache]: Analyzing trace with hash 36804616, now seen corresponding path program 1 times [2021-11-05 16:40:14,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:40:14,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553171475] [2021-11-05 16:40:14,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:40:14,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:40:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:40:14,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:40:14,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:40:14,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553171475] [2021-11-05 16:40:14,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553171475] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:40:14,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:40:14,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:40:14,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125333068] [2021-11-05 16:40:14,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:40:14,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:40:14,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:40:14,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:40:14,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:40:14,115 INFO L87 Difference]: Start difference. First operand 4693 states and 6938 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) [2021-11-05 16:40:14,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:40:14,279 INFO L93 Difference]: Finished difference Result 11205 states and 16555 transitions. [2021-11-05 16:40:14,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:40:14,280 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 [2021-11-05 16:40:14,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:40:14,300 INFO L225 Difference]: With dead ends: 11205 [2021-11-05 16:40:14,301 INFO L226 Difference]: Without dead ends: 6565 [2021-11-05 16:40:14,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.58ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:40:14,308 INFO L933 BasicCegarLoop]: 1953 mSDtfsCounter, 747 mSDsluCounter, 1219 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 3172 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.02ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.07ms IncrementalHoareTripleChecker+Time [2021-11-05 16:40:14,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [747 Valid, 3172 Invalid, 11 Unknown, 0 Unchecked, 4.02ms Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 15.07ms Time] [2021-11-05 16:40:14,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6565 states. [2021-11-05 16:40:14,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6565 to 6557. [2021-11-05 16:40:14,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6557 states, 6556 states have (on average 1.4740695546064673) internal successors, (9664), 6556 states have internal predecessors, (9664), 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) [2021-11-05 16:40:14,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6557 states to 6557 states and 9664 transitions. [2021-11-05 16:40:14,474 INFO L78 Accepts]: Start accepts. Automaton has 6557 states and 9664 transitions. Word has length 75 [2021-11-05 16:40:14,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:40:14,474 INFO L470 AbstractCegarLoop]: Abstraction has 6557 states and 9664 transitions. [2021-11-05 16:40:14,475 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) [2021-11-05 16:40:14,475 INFO L276 IsEmpty]: Start isEmpty. Operand 6557 states and 9664 transitions. [2021-11-05 16:40:14,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-05 16:40:14,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:40:14,480 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:40:14,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-05 16:40:14,480 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:40:14,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:40:14,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1358903704, now seen corresponding path program 1 times [2021-11-05 16:40:14,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:40:14,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906695205] [2021-11-05 16:40:14,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:40:14,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:40:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:40:14,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:40:14,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:40:14,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906695205] [2021-11-05 16:40:14,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906695205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:40:14,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:40:14,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:40:14,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896179257] [2021-11-05 16:40:14,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:40:14,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:40:14,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:40:14,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:40:14,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:40:14,530 INFO L87 Difference]: Start difference. First operand 6557 states and 9664 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2021-11-05 16:40:14,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:40:14,731 INFO L93 Difference]: Finished difference Result 14781 states and 21907 transitions. [2021-11-05 16:40:14,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:40:14,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 83 [2021-11-05 16:40:14,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:40:14,757 INFO L225 Difference]: With dead ends: 14781 [2021-11-05 16:40:14,757 INFO L226 Difference]: Without dead ends: 8277 [2021-11-05 16:40:14,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.49ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:40:14,767 INFO L933 BasicCegarLoop]: 1312 mSDtfsCounter, 763 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 2390 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.92ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 83.83ms IncrementalHoareTripleChecker+Time [2021-11-05 16:40:14,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [763 Valid, 2390 Invalid, 65 Unknown, 0 Unchecked, 2.92ms Time], IncrementalHoareTripleChecker [20 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 83.83ms Time] [2021-11-05 16:40:14,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8277 states. [2021-11-05 16:40:14,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8277 to 8257. [2021-11-05 16:40:14,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8257 states, 8256 states have (on average 1.4752906976744187) internal successors, (12180), 8256 states have internal predecessors, (12180), 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) [2021-11-05 16:40:14,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8257 states to 8257 states and 12180 transitions. [2021-11-05 16:40:14,974 INFO L78 Accepts]: Start accepts. Automaton has 8257 states and 12180 transitions. Word has length 83 [2021-11-05 16:40:14,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:40:14,974 INFO L470 AbstractCegarLoop]: Abstraction has 8257 states and 12180 transitions. [2021-11-05 16:40:14,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2021-11-05 16:40:14,975 INFO L276 IsEmpty]: Start isEmpty. Operand 8257 states and 12180 transitions. [2021-11-05 16:40:14,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-05 16:40:14,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:40:14,983 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:40:14,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-05 16:40:14,983 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:40:14,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:40:14,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1475894567, now seen corresponding path program 1 times [2021-11-05 16:40:14,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:40:14,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046215574] [2021-11-05 16:40:14,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:40:14,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:40:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:40:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 16:40:15,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:40:15,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046215574] [2021-11-05 16:40:15,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046215574] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:40:15,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:40:15,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:40:15,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428606746] [2021-11-05 16:40:15,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:40:15,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:40:15,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:40:15,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:40:15,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:40:15,031 INFO L87 Difference]: Start difference. First operand 8257 states and 12180 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2021-11-05 16:40:15,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:40:15,313 INFO L93 Difference]: Finished difference Result 19919 states and 29468 transitions. [2021-11-05 16:40:15,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:40:15,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-05 16:40:15,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:40:15,356 INFO L225 Difference]: With dead ends: 19919 [2021-11-05 16:40:15,356 INFO L226 Difference]: Without dead ends: 15701 [2021-11-05 16:40:15,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.36ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:40:15,367 INFO L933 BasicCegarLoop]: 2321 mSDtfsCounter, 1130 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1130 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.23ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.77ms IncrementalHoareTripleChecker+Time [2021-11-05 16:40:15,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1130 Valid, 3504 Invalid, 73 Unknown, 0 Unchecked, 4.23ms Time], IncrementalHoareTripleChecker [37 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 54.77ms Time] [2021-11-05 16:40:15,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15701 states. [2021-11-05 16:40:15,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15701 to 8369. [2021-11-05 16:40:15,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8369 states, 8368 states have (on average 1.4689292543021033) internal successors, (12292), 8368 states have internal predecessors, (12292), 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) [2021-11-05 16:40:15,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8369 states to 8369 states and 12292 transitions. [2021-11-05 16:40:15,650 INFO L78 Accepts]: Start accepts. Automaton has 8369 states and 12292 transitions. Word has length 84 [2021-11-05 16:40:15,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:40:15,652 INFO L470 AbstractCegarLoop]: Abstraction has 8369 states and 12292 transitions. [2021-11-05 16:40:15,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2021-11-05 16:40:15,652 INFO L276 IsEmpty]: Start isEmpty. Operand 8369 states and 12292 transitions. [2021-11-05 16:40:15,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-05 16:40:15,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:40:15,662 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:40:15,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-05 16:40:15,663 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:40:15,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:40:15,663 INFO L85 PathProgramCache]: Analyzing trace with hash 341292008, now seen corresponding path program 1 times [2021-11-05 16:40:15,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:40:15,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915287431] [2021-11-05 16:40:15,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:40:15,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:40:15,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:40:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 16:40:15,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:40:15,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915287431] [2021-11-05 16:40:15,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915287431] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:40:15,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:40:15,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 16:40:15,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146371919] [2021-11-05 16:40:15,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:40:15,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:40:15,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:40:15,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:40:15,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:40:15,773 INFO L87 Difference]: Start difference. First operand 8369 states and 12292 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2021-11-05 16:40:16,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:40:16,158 INFO L93 Difference]: Finished difference Result 20135 states and 29611 transitions. [2021-11-05 16:40:16,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 16:40:16,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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 86 [2021-11-05 16:40:16,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:40:16,180 INFO L225 Difference]: With dead ends: 20135 [2021-11-05 16:40:16,180 INFO L226 Difference]: Without dead ends: 11819 [2021-11-05 16:40:16,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.78ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:40:16,193 INFO L933 BasicCegarLoop]: 2316 mSDtfsCounter, 2208 mSDsluCounter, 2254 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2208 SdHoareTripleChecker+Valid, 4570 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 48.90ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.39ms IncrementalHoareTripleChecker+Time [2021-11-05 16:40:16,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2208 Valid, 4570 Invalid, 111 Unknown, 0 Unchecked, 48.90ms Time], IncrementalHoareTripleChecker [23 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 101.39ms Time] [2021-11-05 16:40:16,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11819 states. [2021-11-05 16:40:16,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11819 to 8201. [2021-11-05 16:40:16,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8201 states, 8200 states have (on average 1.4580487804878048) internal successors, (11956), 8200 states have internal predecessors, (11956), 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) [2021-11-05 16:40:16,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8201 states to 8201 states and 11956 transitions. [2021-11-05 16:40:16,384 INFO L78 Accepts]: Start accepts. Automaton has 8201 states and 11956 transitions. Word has length 86 [2021-11-05 16:40:16,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:40:16,384 INFO L470 AbstractCegarLoop]: Abstraction has 8201 states and 11956 transitions. [2021-11-05 16:40:16,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2021-11-05 16:40:16,384 INFO L276 IsEmpty]: Start isEmpty. Operand 8201 states and 11956 transitions. [2021-11-05 16:40:16,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-05 16:40:16,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:40:16,392 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:40:16,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-05 16:40:16,393 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:40:16,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:40:16,393 INFO L85 PathProgramCache]: Analyzing trace with hash -265952138, now seen corresponding path program 1 times [2021-11-05 16:40:16,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:40:16,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233821511] [2021-11-05 16:40:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:40:16,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:40:16,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:40:16,521 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-05 16:40:16,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:40:16,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233821511] [2021-11-05 16:40:16,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233821511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:40:16,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:40:16,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 16:40:16,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306790568] [2021-11-05 16:40:16,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:40:16,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:40:16,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:40:16,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:40:16,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:40:16,523 INFO L87 Difference]: Start difference. First operand 8201 states and 11956 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 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) [2021-11-05 16:40:16,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:40:16,773 INFO L93 Difference]: Finished difference Result 19005 states and 27638 transitions. [2021-11-05 16:40:16,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 16:40:16,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 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 [2021-11-05 16:40:16,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:40:16,795 INFO L225 Difference]: With dead ends: 19005 [2021-11-05 16:40:16,795 INFO L226 Difference]: Without dead ends: 10857 [2021-11-05 16:40:16,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.83ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:40:16,810 INFO L933 BasicCegarLoop]: 2065 mSDtfsCounter, 1523 mSDsluCounter, 2601 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 4666 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.62ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.16ms IncrementalHoareTripleChecker+Time [2021-11-05 16:40:16,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1523 Valid, 4666 Invalid, 16 Unknown, 0 Unchecked, 8.62ms Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 26.16ms Time] [2021-11-05 16:40:16,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10857 states. [2021-11-05 16:40:17,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10857 to 8217. [2021-11-05 16:40:17,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8217 states, 8216 states have (on average 1.4571567672833496) internal successors, (11972), 8216 states have internal predecessors, (11972), 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) [2021-11-05 16:40:17,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8217 states to 8217 states and 11972 transitions. [2021-11-05 16:40:17,038 INFO L78 Accepts]: Start accepts. Automaton has 8217 states and 11972 transitions. Word has length 119 [2021-11-05 16:40:17,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:40:17,039 INFO L470 AbstractCegarLoop]: Abstraction has 8217 states and 11972 transitions. [2021-11-05 16:40:17,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 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) [2021-11-05 16:40:17,039 INFO L276 IsEmpty]: Start isEmpty. Operand 8217 states and 11972 transitions. [2021-11-05 16:40:17,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-05 16:40:17,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:40:17,047 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:40:17,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-05 16:40:17,047 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:40:17,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:40:17,048 INFO L85 PathProgramCache]: Analyzing trace with hash 464660825, now seen corresponding path program 1 times [2021-11-05 16:40:17,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:40:17,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12249732] [2021-11-05 16:40:17,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:40:17,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:40:17,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:40:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-05 16:40:17,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:40:17,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12249732] [2021-11-05 16:40:17,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12249732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:40:17,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:40:17,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 16:40:17,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7804976] [2021-11-05 16:40:17,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:40:17,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:40:17,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:40:17,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:40:17,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:40:17,133 INFO L87 Difference]: Start difference. First operand 8217 states and 11972 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 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) [2021-11-05 16:40:17,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:40:17,918 INFO L93 Difference]: Finished difference Result 40548 states and 59167 transitions. [2021-11-05 16:40:17,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 16:40:17,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 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 126 [2021-11-05 16:40:17,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:40:18,007 INFO L225 Difference]: With dead ends: 40548 [2021-11-05 16:40:18,008 INFO L226 Difference]: Without dead ends: 32384 [2021-11-05 16:40:18,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.28ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:40:18,029 INFO L933 BasicCegarLoop]: 2561 mSDtfsCounter, 3663 mSDsluCounter, 3849 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3663 SdHoareTripleChecker+Valid, 6410 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.77ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.34ms IncrementalHoareTripleChecker+Time [2021-11-05 16:40:18,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3663 Valid, 6410 Invalid, 83 Unknown, 0 Unchecked, 13.77ms Time], IncrementalHoareTripleChecker [13 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 56.34ms Time] [2021-11-05 16:40:18,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32384 states. [2021-11-05 16:40:18,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32384 to 8233. [2021-11-05 16:40:18,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8233 states, 8232 states have (on average 1.456268221574344) internal successors, (11988), 8232 states have internal predecessors, (11988), 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) [2021-11-05 16:40:18,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8233 states to 8233 states and 11988 transitions. [2021-11-05 16:40:18,434 INFO L78 Accepts]: Start accepts. Automaton has 8233 states and 11988 transitions. Word has length 126 [2021-11-05 16:40:18,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:40:18,435 INFO L470 AbstractCegarLoop]: Abstraction has 8233 states and 11988 transitions. [2021-11-05 16:40:18,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 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) [2021-11-05 16:40:18,435 INFO L276 IsEmpty]: Start isEmpty. Operand 8233 states and 11988 transitions. [2021-11-05 16:40:18,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-05 16:40:18,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:40:18,443 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:40:18,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-05 16:40:18,443 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:40:18,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:40:18,444 INFO L85 PathProgramCache]: Analyzing trace with hash 772581936, now seen corresponding path program 1 times [2021-11-05 16:40:18,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:40:18,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421667302] [2021-11-05 16:40:18,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:40:18,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:40:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:40:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-05 16:40:18,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:40:18,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421667302] [2021-11-05 16:40:18,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421667302] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 16:40:18,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567323276] [2021-11-05 16:40:18,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:40:18,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:40:18,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:40:18,538 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) [2021-11-05 16:40:18,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-05 16:40:18,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:40:18,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-05 16:40:18,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:40:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-05 16:40:19,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 16:40:19,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567323276] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:40:19,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-05 16:40:19,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-05 16:40:19,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673634656] [2021-11-05 16:40:19,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:40:19,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-05 16:40:19,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:40:19,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-05 16:40:19,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-05 16:40:19,177 INFO L87 Difference]: Start difference. First operand 8233 states and 11988 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) [2021-11-05 16:40:19,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:40:19,558 INFO L93 Difference]: Finished difference Result 21501 states and 31227 transitions. [2021-11-05 16:40:19,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-05 16:40:19,559 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 129 [2021-11-05 16:40:19,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:40:19,586 INFO L225 Difference]: With dead ends: 21501 [2021-11-05 16:40:19,586 INFO L226 Difference]: Without dead ends: 13321 [2021-11-05 16:40:19,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 35.91ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-05 16:40:19,601 INFO L933 BasicCegarLoop]: 2808 mSDtfsCounter, 2289 mSDsluCounter, 4605 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2289 SdHoareTripleChecker+Valid, 7413 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.52ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.70ms IncrementalHoareTripleChecker+Time [2021-11-05 16:40:19,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2289 Valid, 7413 Invalid, 38 Unknown, 0 Unchecked, 7.52ms Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 47.70ms Time] [2021-11-05 16:40:19,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13321 states. [2021-11-05 16:40:19,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13321 to 8241. [2021-11-05 16:40:19,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8241 states, 8240 states have (on average 1.4558252427184466) internal successors, (11996), 8240 states have internal predecessors, (11996), 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) [2021-11-05 16:40:19,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8241 states to 8241 states and 11996 transitions. [2021-11-05 16:40:19,859 INFO L78 Accepts]: Start accepts. Automaton has 8241 states and 11996 transitions. Word has length 129 [2021-11-05 16:40:19,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:40:19,859 INFO L470 AbstractCegarLoop]: Abstraction has 8241 states and 11996 transitions. [2021-11-05 16:40:19,859 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) [2021-11-05 16:40:19,860 INFO L276 IsEmpty]: Start isEmpty. Operand 8241 states and 11996 transitions. [2021-11-05 16:40:19,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-05 16:40:19,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:40:19,867 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:40:19,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-05 16:40:20,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-05 16:40:20,084 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:40:20,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:40:20,084 INFO L85 PathProgramCache]: Analyzing trace with hash 2006158458, now seen corresponding path program 1 times [2021-11-05 16:40:20,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:40:20,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874552701] [2021-11-05 16:40:20,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:40:20,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:40:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:40:20,254 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-05 16:40:20,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:40:20,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874552701] [2021-11-05 16:40:20,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874552701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 16:40:20,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384719543] [2021-11-05 16:40:20,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:40:20,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:40:20,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:40:20,256 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) [2021-11-05 16:40:20,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-05 16:40:20,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:40:20,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 1506 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-05 16:40:20,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:40:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-05 16:40:20,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 16:40:20,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384719543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:40:20,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-05 16:40:20,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-05 16:40:20,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356447358] [2021-11-05 16:40:20,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:40:20,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:40:20,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:40:20,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:40:20,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:40:20,932 INFO L87 Difference]: Start difference. First operand 8241 states and 11996 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 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) [2021-11-05 16:40:21,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:40:21,203 INFO L93 Difference]: Finished difference Result 10931 states and 15825 transitions. [2021-11-05 16:40:21,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 16:40:21,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 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 144 [2021-11-05 16:40:21,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:40:21,222 INFO L225 Difference]: With dead ends: 10931 [2021-11-05 16:40:21,222 INFO L226 Difference]: Without dead ends: 10923 [2021-11-05 16:40:21,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.77ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:40:21,226 INFO L933 BasicCegarLoop]: 1985 mSDtfsCounter, 1995 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1995 SdHoareTripleChecker+Valid, 2823 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.06ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.11ms IncrementalHoareTripleChecker+Time [2021-11-05 16:40:21,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1995 Valid, 2823 Invalid, 14 Unknown, 0 Unchecked, 3.06ms Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 21.11ms Time] [2021-11-05 16:40:21,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10923 states. [2021-11-05 16:40:21,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10923 to 9639. [2021-11-05 16:40:21,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9639 states, 9638 states have (on average 1.4522722556547) internal successors, (13997), 9638 states have internal predecessors, (13997), 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) [2021-11-05 16:40:21,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9639 states to 9639 states and 13997 transitions. [2021-11-05 16:40:21,555 INFO L78 Accepts]: Start accepts. Automaton has 9639 states and 13997 transitions. Word has length 144 [2021-11-05 16:40:21,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:40:21,555 INFO L470 AbstractCegarLoop]: Abstraction has 9639 states and 13997 transitions. [2021-11-05 16:40:21,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 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) [2021-11-05 16:40:21,556 INFO L276 IsEmpty]: Start isEmpty. Operand 9639 states and 13997 transitions. [2021-11-05 16:40:21,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-05 16:40:21,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:40:21,563 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:40:21,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-05 16:40:21,782 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 [2021-11-05 16:40:21,782 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:40:21,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:40:21,783 INFO L85 PathProgramCache]: Analyzing trace with hash -290010734, now seen corresponding path program 1 times [2021-11-05 16:40:21,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:40:21,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499255121] [2021-11-05 16:40:21,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:40:21,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:40:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:40:21,934 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-05 16:40:21,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:40:21,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499255121] [2021-11-05 16:40:21,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499255121] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:40:21,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:40:21,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:40:21,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494325589] [2021-11-05 16:40:21,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:40:21,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:40:21,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:40:21,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:40:21,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:40:21,937 INFO L87 Difference]: Start difference. First operand 9639 states and 13997 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:40:22,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:40:22,149 INFO L93 Difference]: Finished difference Result 14409 states and 20943 transitions. [2021-11-05 16:40:22,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:40:22,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-11-05 16:40:22,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:40:22,156 INFO L225 Difference]: With dead ends: 14409 [2021-11-05 16:40:22,156 INFO L226 Difference]: Without dead ends: 4081 [2021-11-05 16:40:22,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.32ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:40:22,169 INFO L933 BasicCegarLoop]: 1305 mSDtfsCounter, 1120 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.90ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.28ms IncrementalHoareTripleChecker+Time [2021-11-05 16:40:22,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1120 Valid, 1394 Invalid, 11 Unknown, 0 Unchecked, 1.90ms Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 21.28ms Time] [2021-11-05 16:40:22,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4081 states. [2021-11-05 16:40:22,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4081 to 4081. [2021-11-05 16:40:22,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4081 states, 4080 states have (on average 1.4424019607843137) internal successors, (5885), 4080 states have internal predecessors, (5885), 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) [2021-11-05 16:40:22,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4081 states to 4081 states and 5885 transitions. [2021-11-05 16:40:22,323 INFO L78 Accepts]: Start accepts. Automaton has 4081 states and 5885 transitions. Word has length 148 [2021-11-05 16:40:22,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:40:22,324 INFO L470 AbstractCegarLoop]: Abstraction has 4081 states and 5885 transitions. [2021-11-05 16:40:22,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:40:22,324 INFO L276 IsEmpty]: Start isEmpty. Operand 4081 states and 5885 transitions. [2021-11-05 16:40:22,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-05 16:40:22,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:40:22,329 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:40:22,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-05 16:40:22,329 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:40:22,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:40:22,330 INFO L85 PathProgramCache]: Analyzing trace with hash 527780847, now seen corresponding path program 1 times [2021-11-05 16:40:22,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:40:22,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088167616] [2021-11-05 16:40:22,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:40:22,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:40:22,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:40:22,510 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-05 16:40:22,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:40:22,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088167616] [2021-11-05 16:40:22,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088167616] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:40:22,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:40:22,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-05 16:40:22,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754738025] [2021-11-05 16:40:22,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:40:22,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-05 16:40:22,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:40:22,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-05 16:40:22,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-05 16:40:22,513 INFO L87 Difference]: Start difference. First operand 4081 states and 5885 transitions. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 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) [2021-11-05 16:40:24,648 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 16:40:25,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:40:25,180 INFO L93 Difference]: Finished difference Result 15553 states and 22553 transitions. [2021-11-05 16:40:25,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-05 16:40:25,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 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 [2021-11-05 16:40:25,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:40:25,195 INFO L225 Difference]: With dead ends: 15553 [2021-11-05 16:40:25,195 INFO L226 Difference]: Without dead ends: 11558 [2021-11-05 16:40:25,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.24ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-05 16:40:25,202 INFO L933 BasicCegarLoop]: 2443 mSDtfsCounter, 7613 mSDsluCounter, 11114 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2066.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7613 SdHoareTripleChecker+Valid, 13557 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.60ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2091.72ms IncrementalHoareTripleChecker+Time [2021-11-05 16:40:25,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7613 Valid, 13557 Invalid, 63 Unknown, 0 Unchecked, 14.60ms Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 1 Unknown, 0 Unchecked, 2091.72ms Time] [2021-11-05 16:40:25,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11558 states. [2021-11-05 16:40:25,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11558 to 4111. [2021-11-05 16:40:25,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4111 states, 4110 states have (on average 1.4391727493917275) internal successors, (5915), 4110 states have internal predecessors, (5915), 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) [2021-11-05 16:40:25,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4111 states to 4111 states and 5915 transitions. [2021-11-05 16:40:25,394 INFO L78 Accepts]: Start accepts. Automaton has 4111 states and 5915 transitions. Word has length 156 [2021-11-05 16:40:25,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:40:25,395 INFO L470 AbstractCegarLoop]: Abstraction has 4111 states and 5915 transitions. [2021-11-05 16:40:25,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 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) [2021-11-05 16:40:25,395 INFO L276 IsEmpty]: Start isEmpty. Operand 4111 states and 5915 transitions. [2021-11-05 16:40:25,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-05 16:40:25,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:40:25,399 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:40:25,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-05 16:40:25,400 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:40:25,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:40:25,400 INFO L85 PathProgramCache]: Analyzing trace with hash 972368043, now seen corresponding path program 1 times [2021-11-05 16:40:25,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:40:25,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757655840] [2021-11-05 16:40:25,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:40:25,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:40:25,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:40:25,553 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-05 16:40:25,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:40:25,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757655840] [2021-11-05 16:40:25,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757655840] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:40:25,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:40:25,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-05 16:40:25,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178698600] [2021-11-05 16:40:25,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:40:25,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-05 16:40:25,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:40:25,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-05 16:40:25,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-05 16:40:25,556 INFO L87 Difference]: Start difference. First operand 4111 states and 5915 transitions. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:40:26,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:40:26,615 INFO L93 Difference]: Finished difference Result 25221 states and 36317 transitions. [2021-11-05 16:40:26,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-05 16:40:26,616 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-11-05 16:40:26,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:40:26,643 INFO L225 Difference]: With dead ends: 25221 [2021-11-05 16:40:26,643 INFO L226 Difference]: Without dead ends: 21196 [2021-11-05 16:40:26,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 86.80ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-11-05 16:40:26,651 INFO L933 BasicCegarLoop]: 3067 mSDtfsCounter, 9039 mSDsluCounter, 11005 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9039 SdHoareTripleChecker+Valid, 14072 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.40ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 116.92ms IncrementalHoareTripleChecker+Time [2021-11-05 16:40:26,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9039 Valid, 14072 Invalid, 190 Unknown, 0 Unchecked, 16.40ms Time], IncrementalHoareTripleChecker [37 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 116.92ms Time] [2021-11-05 16:40:26,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21196 states. [2021-11-05 16:40:27,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21196 to 8180. [2021-11-05 16:40:27,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8180 states, 8179 states have (on average 1.4381953784081183) internal successors, (11763), 8179 states have internal predecessors, (11763), 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) [2021-11-05 16:40:27,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8180 states to 8180 states and 11763 transitions. [2021-11-05 16:40:27,023 INFO L78 Accepts]: Start accepts. Automaton has 8180 states and 11763 transitions. Word has length 158 [2021-11-05 16:40:27,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:40:27,024 INFO L470 AbstractCegarLoop]: Abstraction has 8180 states and 11763 transitions. [2021-11-05 16:40:27,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:40:27,024 INFO L276 IsEmpty]: Start isEmpty. Operand 8180 states and 11763 transitions. [2021-11-05 16:40:27,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-05 16:40:27,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:40:27,032 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:40:27,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-05 16:40:27,032 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:40:27,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:40:27,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1848387049, now seen corresponding path program 1 times [2021-11-05 16:40:27,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:40:27,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412156109] [2021-11-05 16:40:27,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:40:27,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:40:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:40:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-05 16:40:27,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:40:27,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412156109] [2021-11-05 16:40:27,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412156109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:40:27,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:40:27,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-05 16:40:27,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591908244] [2021-11-05 16:40:27,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:40:27,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-05 16:40:27,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:40:27,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-05 16:40:27,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:40:27,211 INFO L87 Difference]: Start difference. First operand 8180 states and 11763 transitions. Second operand has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:40:28,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:40:28,703 INFO L93 Difference]: Finished difference Result 36292 states and 52227 transitions. [2021-11-05 16:40:28,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-05 16:40:28,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-11-05 16:40:28,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:40:28,750 INFO L225 Difference]: With dead ends: 36292 [2021-11-05 16:40:28,750 INFO L226 Difference]: Without dead ends: 28258 [2021-11-05 16:40:28,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.80ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-05 16:40:28,767 INFO L933 BasicCegarLoop]: 3385 mSDtfsCounter, 3613 mSDsluCounter, 6672 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3613 SdHoareTripleChecker+Valid, 10057 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.27ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.17ms IncrementalHoareTripleChecker+Time [2021-11-05 16:40:28,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3613 Valid, 10057 Invalid, 98 Unknown, 0 Unchecked, 9.27ms Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 74.17ms Time] [2021-11-05 16:40:28,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28258 states. [2021-11-05 16:40:29,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28258 to 8212. [2021-11-05 16:40:29,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8212 states, 8211 states have (on average 1.4364876385336744) internal successors, (11795), 8211 states have internal predecessors, (11795), 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) [2021-11-05 16:40:29,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8212 states to 8212 states and 11795 transitions. [2021-11-05 16:40:29,463 INFO L78 Accepts]: Start accepts. Automaton has 8212 states and 11795 transitions. Word has length 158 [2021-11-05 16:40:29,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:40:29,463 INFO L470 AbstractCegarLoop]: Abstraction has 8212 states and 11795 transitions. [2021-11-05 16:40:29,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:40:29,464 INFO L276 IsEmpty]: Start isEmpty. Operand 8212 states and 11795 transitions. [2021-11-05 16:40:29,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-05 16:40:29,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:40:29,472 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:40:29,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-05 16:40:29,472 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:40:29,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:40:29,472 INFO L85 PathProgramCache]: Analyzing trace with hash -622349658, now seen corresponding path program 1 times [2021-11-05 16:40:29,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:40:29,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513243630] [2021-11-05 16:40:29,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:40:29,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:40:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:40:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:40:30,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:40:30,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513243630] [2021-11-05 16:40:30,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513243630] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 16:40:30,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362754486] [2021-11-05 16:40:30,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:40:30,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:40:30,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:40:30,781 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) [2021-11-05 16:40:30,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-05 16:40:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:40:31,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-05 16:40:31,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:40:32,158 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-05 16:40:32,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:40:32,642 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-05 16:40:32,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362754486] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-05 16:40:32,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-05 16:40:32,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [23, 15] total 44 [2021-11-05 16:40:32,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013883653] [2021-11-05 16:40:32,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:40:32,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-05 16:40:32,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:40:32,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-05 16:40:32,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1779, Unknown=0, NotChecked=0, Total=1892 [2021-11-05 16:40:32,645 INFO L87 Difference]: Start difference. First operand 8212 states and 11795 transitions. Second operand has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:40:35,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:40:35,457 INFO L93 Difference]: Finished difference Result 45798 states and 65907 transitions. [2021-11-05 16:40:35,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-05 16:40:35,458 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-11-05 16:40:35,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:40:35,515 INFO L225 Difference]: With dead ends: 45798 [2021-11-05 16:40:35,516 INFO L226 Difference]: Without dead ends: 37732 [2021-11-05 16:40:35,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1180.67ms TimeCoverageRelationStatistics Valid=166, Invalid=2284, Unknown=0, NotChecked=0, Total=2450 [2021-11-05 16:40:35,532 INFO L933 BasicCegarLoop]: 5389 mSDtfsCounter, 12314 mSDsluCounter, 21527 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 204.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12314 SdHoareTripleChecker+Valid, 26916 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.93ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 244.62ms IncrementalHoareTripleChecker+Time [2021-11-05 16:40:35,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12314 Valid, 26916 Invalid, 425 Unknown, 0 Unchecked, 26.93ms Time], IncrementalHoareTripleChecker [39 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 244.62ms Time] [2021-11-05 16:40:35,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37732 states. [2021-11-05 16:40:36,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37732 to 8236. [2021-11-05 16:40:36,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8236 states, 8235 states have (on average 1.4342440801457195) internal successors, (11811), 8235 states have internal predecessors, (11811), 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) [2021-11-05 16:40:36,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8236 states to 8236 states and 11811 transitions. [2021-11-05 16:40:36,261 INFO L78 Accepts]: Start accepts. Automaton has 8236 states and 11811 transitions. Word has length 158 [2021-11-05 16:40:36,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:40:36,262 INFO L470 AbstractCegarLoop]: Abstraction has 8236 states and 11811 transitions. [2021-11-05 16:40:36,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:40:36,262 INFO L276 IsEmpty]: Start isEmpty. Operand 8236 states and 11811 transitions. [2021-11-05 16:40:36,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-05 16:40:36,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:40:36,270 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:40:36,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-05 16:40:36,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:40:36,480 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:40:36,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:40:36,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1108652355, now seen corresponding path program 1 times [2021-11-05 16:40:36,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:40:36,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859298723] [2021-11-05 16:40:36,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:40:36,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:40:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:40:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-05 16:40:37,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:40:37,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859298723] [2021-11-05 16:40:37,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859298723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:40:37,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:40:37,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-05 16:40:37,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051129471] [2021-11-05 16:40:37,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:40:37,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-05 16:40:37,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:40:37,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-05 16:40:37,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-11-05 16:40:37,108 INFO L87 Difference]: Start difference. First operand 8236 states and 11811 transitions. Second operand has 16 states, 16 states have (on average 9.75) internal successors, (156), 15 states have internal predecessors, (156), 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) [2021-11-05 16:40:40,628 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 16:40:45,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:40:45,841 INFO L93 Difference]: Finished difference Result 25128 states and 36125 transitions. [2021-11-05 16:40:45,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-05 16:40:45,841 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.75) internal successors, (156), 15 states have internal predecessors, (156), 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 [2021-11-05 16:40:45,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:40:45,863 INFO L225 Difference]: With dead ends: 25128 [2021-11-05 16:40:45,864 INFO L226 Difference]: Without dead ends: 17038 [2021-11-05 16:40:45,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1158.33ms TimeCoverageRelationStatistics Valid=303, Invalid=1103, Unknown=0, NotChecked=0, Total=1406 [2021-11-05 16:40:45,872 INFO L933 BasicCegarLoop]: 2575 mSDtfsCounter, 4797 mSDsluCounter, 21880 mSDsCounter, 0 mSdLazyCounter, 4792 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5653.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4797 SdHoareTripleChecker+Valid, 24455 SdHoareTripleChecker+Invalid, 4844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.75ms SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 4792 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6252.83ms IncrementalHoareTripleChecker+Time [2021-11-05 16:40:45,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4797 Valid, 24455 Invalid, 4844 Unknown, 0 Unchecked, 35.75ms Time], IncrementalHoareTripleChecker [51 Valid, 4792 Invalid, 1 Unknown, 0 Unchecked, 6252.83ms Time] [2021-11-05 16:40:45,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17038 states. [2021-11-05 16:40:46,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17038 to 8276. [2021-11-05 16:40:46,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8276 states, 8275 states have (on average 1.4331117824773414) internal successors, (11859), 8275 states have internal predecessors, (11859), 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) [2021-11-05 16:40:46,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8276 states to 8276 states and 11859 transitions. [2021-11-05 16:40:46,553 INFO L78 Accepts]: Start accepts. Automaton has 8276 states and 11859 transitions. Word has length 166 [2021-11-05 16:40:46,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:40:46,554 INFO L470 AbstractCegarLoop]: Abstraction has 8276 states and 11859 transitions. [2021-11-05 16:40:46,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.75) internal successors, (156), 15 states have internal predecessors, (156), 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) [2021-11-05 16:40:46,554 INFO L276 IsEmpty]: Start isEmpty. Operand 8276 states and 11859 transitions. [2021-11-05 16:40:46,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-05 16:40:46,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:40:46,561 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:40:46,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-05 16:40:46,561 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:40:46,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:40:46,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1340947775, now seen corresponding path program 1 times [2021-11-05 16:40:46,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:40:46,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395339685] [2021-11-05 16:40:46,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:40:46,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:40:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:40:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 16:40:47,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:40:47,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395339685] [2021-11-05 16:40:47,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395339685] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:40:47,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:40:47,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-11-05 16:40:47,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052579523] [2021-11-05 16:40:47,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:40:47,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-05 16:40:47,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:40:47,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-05 16:40:47,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-11-05 16:40:47,834 INFO L87 Difference]: Start difference. First operand 8276 states and 11859 transitions. Second operand has 29 states, 29 states have (on average 5.689655172413793) internal successors, (165), 28 states have internal predecessors, (165), 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) [2021-11-05 16:40:52,970 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 16:42:05,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:42:05,642 INFO L93 Difference]: Finished difference Result 240956 states and 350203 transitions. [2021-11-05 16:42:05,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2021-11-05 16:42:05,643 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.689655172413793) internal successors, (165), 28 states have internal predecessors, (165), 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 [2021-11-05 16:42:05,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:42:06,311 INFO L225 Difference]: With dead ends: 240956 [2021-11-05 16:42:06,311 INFO L226 Difference]: Without dead ends: 232826 [2021-11-05 16:42:06,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25490 ImplicationChecksByTransitivity, 16556.86ms TimeCoverageRelationStatistics Valid=7081, Invalid=60259, Unknown=0, NotChecked=0, Total=67340 [2021-11-05 16:42:06,395 INFO L933 BasicCegarLoop]: 12038 mSDtfsCounter, 42711 mSDsluCounter, 224770 mSDsCounter, 0 mSdLazyCounter, 42853 mSolverCounterSat, 687 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30234.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42711 SdHoareTripleChecker+Valid, 236808 SdHoareTripleChecker+Invalid, 43541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 479.87ms SdHoareTripleChecker+Time, 687 IncrementalHoareTripleChecker+Valid, 42853 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34609.13ms IncrementalHoareTripleChecker+Time [2021-11-05 16:42:06,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42711 Valid, 236808 Invalid, 43541 Unknown, 0 Unchecked, 479.87ms Time], IncrementalHoareTripleChecker [687 Valid, 42853 Invalid, 1 Unknown, 0 Unchecked, 34609.13ms Time] [2021-11-05 16:42:06,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232826 states. [2021-11-05 16:42:10,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232826 to 18914. [2021-11-05 16:42:10,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18914 states, 18913 states have (on average 1.4446676888912389) internal successors, (27323), 18913 states have internal predecessors, (27323), 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) [2021-11-05 16:42:10,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18914 states to 18914 states and 27323 transitions. [2021-11-05 16:42:10,355 INFO L78 Accepts]: Start accepts. Automaton has 18914 states and 27323 transitions. Word has length 166 [2021-11-05 16:42:10,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:42:10,356 INFO L470 AbstractCegarLoop]: Abstraction has 18914 states and 27323 transitions. [2021-11-05 16:42:10,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.689655172413793) internal successors, (165), 28 states have internal predecessors, (165), 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) [2021-11-05 16:42:10,356 INFO L276 IsEmpty]: Start isEmpty. Operand 18914 states and 27323 transitions. [2021-11-05 16:42:10,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-05 16:42:10,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:42:10,370 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:42:10,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-05 16:42:10,370 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:42:10,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:42:10,370 INFO L85 PathProgramCache]: Analyzing trace with hash -115618885, now seen corresponding path program 1 times [2021-11-05 16:42:10,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:42:10,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307691823] [2021-11-05 16:42:10,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:42:10,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:42:10,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:42:11,094 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-05 16:42:11,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:42:11,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307691823] [2021-11-05 16:42:11,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307691823] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 16:42:11,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847514041] [2021-11-05 16:42:11,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:42:11,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:42:11,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:42:11,096 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) [2021-11-05 16:42:11,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-05 16:42:11,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:42:11,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 1629 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-05 16:42:11,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:42:12,383 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-05 16:42:12,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 14 [2021-11-05 16:42:12,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-05 16:42:12,936 INFO L354 Elim1Store]: treesize reduction 16, result has 23.8 percent of original size [2021-11-05 16:42:12,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2021-11-05 16:42:17,141 INFO L354 Elim1Store]: treesize reduction 70, result has 24.7 percent of original size [2021-11-05 16:42:17,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 58 [2021-11-05 16:42:17,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-11-05 16:42:21,616 INFO L354 Elim1Store]: treesize reduction 99, result has 28.8 percent of original size [2021-11-05 16:42:21,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 73 treesize of output 101 [2021-11-05 16:42:21,621 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-11-05 16:42:21,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-05 16:42:21,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-05 16:42:21,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033236158] [2021-11-05 16:42:21,621 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-05 16:42:21,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-05 16:42:21,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:42:21,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-05 16:42:21,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1968, Unknown=2, NotChecked=0, Total=2162 [2021-11-05 16:42:21,623 INFO L87 Difference]: Start difference. First operand 18914 states and 27323 transitions. Second operand has 25 states, 25 states have (on average 6.6) internal successors, (165), 24 states have internal predecessors, (165), 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) [2021-11-05 16:42:21,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-05 16:42:21,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 9027.14ms TimeCoverageRelationStatistics Valid=192, Invalid=1968, Unknown=2, NotChecked=0, Total=2162 [2021-11-05 16:42:21,623 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.01ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-05 16:42:21,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.01ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-05 16:42:21,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-05 16:42:21,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:42:21,825 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@240960d4 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:359) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-05 16:42:21,831 INFO L158 Benchmark]: Toolchain (without parser) took 135320.59ms. Allocated memory was 54.5MB in the beginning and 4.2GB in the end (delta: 4.1GB). Free memory was 33.1MB in the beginning and 2.7GB in the end (delta: -2.7GB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. [2021-11-05 16:42:21,831 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 54.5MB. Free memory was 37.1MB in the beginning and 37.0MB in the end (delta: 44.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-05 16:42:21,832 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1330.33ms. Allocated memory was 54.5MB in the beginning and 125.8MB in the end (delta: 71.3MB). Free memory was 33.0MB in the beginning and 69.4MB in the end (delta: -36.4MB). Peak memory consumption was 53.6MB. Max. memory is 16.1GB. [2021-11-05 16:42:21,832 INFO L158 Benchmark]: Boogie Procedure Inliner took 191.39ms. Allocated memory is still 125.8MB. Free memory was 69.4MB in the beginning and 70.0MB in the end (delta: -563.8kB). Peak memory consumption was 25.8MB. Max. memory is 16.1GB. [2021-11-05 16:42:21,832 INFO L158 Benchmark]: Boogie Preprocessor took 149.68ms. Allocated memory is still 125.8MB. Free memory was 70.0MB in the beginning and 47.8MB in the end (delta: 22.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-05 16:42:21,832 INFO L158 Benchmark]: RCFGBuilder took 4203.45ms. Allocated memory was 125.8MB in the beginning and 278.9MB in the end (delta: 153.1MB). Free memory was 47.8MB in the beginning and 152.0MB in the end (delta: -104.2MB). Peak memory consumption was 60.8MB. Max. memory is 16.1GB. [2021-11-05 16:42:21,835 INFO L158 Benchmark]: TraceAbstraction took 129439.13ms. Allocated memory was 278.9MB in the beginning and 4.2GB in the end (delta: 3.9GB). Free memory was 150.9MB in the beginning and 2.7GB in the end (delta: -2.6GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. [2021-11-05 16:42:21,837 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 54.5MB. Free memory was 37.1MB in the beginning and 37.0MB in the end (delta: 44.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1330.33ms. Allocated memory was 54.5MB in the beginning and 125.8MB in the end (delta: 71.3MB). Free memory was 33.0MB in the beginning and 69.4MB in the end (delta: -36.4MB). Peak memory consumption was 53.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 191.39ms. Allocated memory is still 125.8MB. Free memory was 69.4MB in the beginning and 70.0MB in the end (delta: -563.8kB). Peak memory consumption was 25.8MB. Max. memory is 16.1GB. * Boogie Preprocessor took 149.68ms. Allocated memory is still 125.8MB. Free memory was 70.0MB in the beginning and 47.8MB in the end (delta: 22.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * RCFGBuilder took 4203.45ms. Allocated memory was 125.8MB in the beginning and 278.9MB in the end (delta: 153.1MB). Free memory was 47.8MB in the beginning and 152.0MB in the end (delta: -104.2MB). Peak memory consumption was 60.8MB. Max. memory is 16.1GB. * TraceAbstraction took 129439.13ms. Allocated memory was 278.9MB in the beginning and 4.2GB in the end (delta: 3.9GB). Free memory was 150.9MB in the beginning and 2.7GB in the end (delta: -2.6GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@240960d4 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@240960d4: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-05 16:42:21,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.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 f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5f08f0f [2021-11-05 16:42:23,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-05 16:42:23,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-05 16:42:23,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-05 16:42:23,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-05 16:42:23,683 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-05 16:42:23,684 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-05 16:42:23,689 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-05 16:42:23,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-05 16:42:23,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-05 16:42:23,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-05 16:42:23,699 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-05 16:42:23,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-05 16:42:23,701 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-05 16:42:23,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-05 16:42:23,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-05 16:42:23,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-05 16:42:23,709 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-05 16:42:23,710 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-05 16:42:23,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-05 16:42:23,714 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-05 16:42:23,715 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-05 16:42:23,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-05 16:42:23,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-05 16:42:23,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-05 16:42:23,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-05 16:42:23,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-05 16:42:23,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-05 16:42:23,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-05 16:42:23,722 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-05 16:42:23,722 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-05 16:42:23,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-05 16:42:23,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-05 16:42:23,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-05 16:42:23,725 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-05 16:42:23,725 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-05 16:42:23,726 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-05 16:42:23,726 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-05 16:42:23,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-05 16:42:23,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-05 16:42:23,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-05 16:42:23,731 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-11-05 16:42:23,755 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-05 16:42:23,755 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-05 16:42:23,756 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-05 16:42:23,756 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-05 16:42:23,758 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-05 16:42:23,758 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-05 16:42:23,758 INFO L138 SettingsManager]: * Use SBE=true [2021-11-05 16:42:23,758 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-05 16:42:23,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-05 16:42:23,758 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-05 16:42:23,759 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-05 16:42:23,759 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-05 16:42:23,759 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-05 16:42:23,759 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-05 16:42:23,760 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-05 16:42:23,760 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-05 16:42:23,760 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-05 16:42:23,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-05 16:42:23,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-05 16:42:23,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-05 16:42:23,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 16:42:23,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-05 16:42:23,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-05 16:42:23,761 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-05 16:42:23,761 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-05 16:42:23,761 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-05 16:42:23,761 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-05 16:42:23,762 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-05 16:42:23,762 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-05 16:42:23,762 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-05 16:42:23,762 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-05 16:42:23,762 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b [2021-11-05 16:42:23,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-05 16:42:24,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-05 16:42:24,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-05 16:42:24,006 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-05 16:42:24,007 INFO L275 PluginConnector]: CDTParser initialized [2021-11-05 16:42:24,008 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-05 16:42:24,068 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60cde8460/5555fa43d22743eb8b628e1972796a81/FLAG694a4759f [2021-11-05 16:42:24,596 INFO L306 CDTParser]: Found 1 translation units. [2021-11-05 16:42:24,596 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-05 16:42:24,628 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60cde8460/5555fa43d22743eb8b628e1972796a81/FLAG694a4759f [2021-11-05 16:42:24,843 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60cde8460/5555fa43d22743eb8b628e1972796a81 [2021-11-05 16:42:24,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-05 16:42:24,846 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-05 16:42:24,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-05 16:42:24,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-05 16:42:24,850 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-05 16:42:24,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 04:42:24" (1/1) ... [2021-11-05 16:42:24,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7797c3af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:42:24, skipping insertion in model container [2021-11-05 16:42:24,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 04:42:24" (1/1) ... [2021-11-05 16:42:24,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-05 16:42:24,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-05 16:42:25,677 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-11-05 16:42:25,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 16:42:25,992 INFO L203 MainTranslator]: Completed pre-run [2021-11-05 16:42:26,147 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-11-05 16:42:26,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 16:42:26,364 INFO L208 MainTranslator]: Completed translation [2021-11-05 16:42:26,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:42:26 WrapperNode [2021-11-05 16:42:26,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-05 16:42:26,367 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-05 16:42:26,367 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-05 16:42:26,368 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-05 16:42:26,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:42:26" (1/1) ... [2021-11-05 16:42:26,426 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:42:26" (1/1) ... [2021-11-05 16:42:26,549 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-05 16:42:26,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-05 16:42:26,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-05 16:42:26,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-05 16:42:26,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:42:26" (1/1) ... [2021-11-05 16:42:26,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:42:26" (1/1) ... [2021-11-05 16:42:26,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:42:26" (1/1) ... [2021-11-05 16:42:26,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:42:26" (1/1) ... [2021-11-05 16:42:26,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:42:26" (1/1) ... [2021-11-05 16:42:26,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:42:26" (1/1) ... [2021-11-05 16:42:26,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:42:26" (1/1) ... [2021-11-05 16:42:26,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-05 16:42:26,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-05 16:42:26,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-05 16:42:26,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-05 16:42:26,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:42:26" (1/1) ... [2021-11-05 16:42:26,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 16:42:26,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:42:26,770 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) [2021-11-05 16:42:26,777 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 [2021-11-05 16:42:26,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-05 16:42:26,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-05 16:42:26,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-05 16:42:26,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-05 16:42:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-05 16:42:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-05 16:42:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-05 16:42:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-05 16:42:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-05 16:42:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-05 16:42:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-05 16:42:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-05 16:42:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-05 16:42:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-05 16:42:26,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-05 16:42:26,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-05 16:42:26,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-05 16:42:26,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-05 16:42:26,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-05 16:42:26,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-05 16:42:26,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-05 16:42:26,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-05 16:42:26,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-05 16:42:26,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-05 16:42:26,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-05 16:42:26,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-05 16:42:26,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-05 16:42:26,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-05 16:42:26,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-05 16:42:37,700 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-05 16:42:37,701 INFO L299 CfgBuilder]: Removed 769 assume(true) statements. [2021-11-05 16:42:37,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 04:42:37 BoogieIcfgContainer [2021-11-05 16:42:37,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-05 16:42:37,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-05 16:42:37,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-05 16:42:37,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-05 16:42:37,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.11 04:42:24" (1/3) ... [2021-11-05 16:42:37,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@498e9369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 04:42:37, skipping insertion in model container [2021-11-05 16:42:37,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:42:26" (2/3) ... [2021-11-05 16:42:37,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@498e9369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 04:42:37, skipping insertion in model container [2021-11-05 16:42:37,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 04:42:37" (3/3) ... [2021-11-05 16:42:37,708 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-05 16:42:37,711 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-05 16:42:37,711 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-05 16:42:37,742 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-05 16:42:37,746 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 [2021-11-05 16:42:37,746 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-05 16:42:37,765 INFO L276 IsEmpty]: Start isEmpty. Operand has 898 states, 896 states have (on average 1.5290178571428572) internal successors, (1370), 897 states have internal predecessors, (1370), 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) [2021-11-05 16:42:37,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-05 16:42:37,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:42:37,771 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:42:37,772 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:42:37,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:42:37,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1898451720, now seen corresponding path program 1 times [2021-11-05 16:42:37,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-05 16:42:37,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13090563] [2021-11-05 16:42:37,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:42:37,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-05 16:42:37,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-05 16:42:37,787 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-05 16:42:37,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-05 16:42:38,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:42:38,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-05 16:42:38,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:42:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:42:38,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:42:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:42:38,468 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-05 16:42:38,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13090563] [2021-11-05 16:42:38,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13090563] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-05 16:42:38,469 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:42:38,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-05 16:42:38,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530409701] [2021-11-05 16:42:38,471 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-05 16:42:38,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:42:38,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-05 16:42:38,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:42:38,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:42:38,494 INFO L87 Difference]: Start difference. First operand has 898 states, 896 states have (on average 1.5290178571428572) internal successors, (1370), 897 states have internal predecessors, (1370), 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 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2021-11-05 16:42:39,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:42:39,064 INFO L93 Difference]: Finished difference Result 3424 states and 5255 transitions. [2021-11-05 16:42:39,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 16:42:39,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-05 16:42:39,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:42:39,083 INFO L225 Difference]: With dead ends: 3424 [2021-11-05 16:42:39,083 INFO L226 Difference]: Without dead ends: 2515 [2021-11-05 16:42:39,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.17ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:42:39,091 INFO L933 BasicCegarLoop]: 1300 mSDtfsCounter, 3677 mSDsluCounter, 2486 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 388.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3677 SdHoareTripleChecker+Valid, 3786 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.99ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 415.76ms IncrementalHoareTripleChecker+Time [2021-11-05 16:42:39,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3677 Valid, 3786 Invalid, 27 Unknown, 0 Unchecked, 12.99ms Time], IncrementalHoareTripleChecker [9 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 415.76ms Time] [2021-11-05 16:42:39,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2021-11-05 16:42:39,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 2515. [2021-11-05 16:42:39,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2515 states, 2514 states have (on average 1.4657915672235482) internal successors, (3685), 2514 states have internal predecessors, (3685), 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) [2021-11-05 16:42:39,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2515 states to 2515 states and 3685 transitions. [2021-11-05 16:42:39,183 INFO L78 Accepts]: Start accepts. Automaton has 2515 states and 3685 transitions. Word has length 36 [2021-11-05 16:42:39,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:42:39,184 INFO L470 AbstractCegarLoop]: Abstraction has 2515 states and 3685 transitions. [2021-11-05 16:42:39,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2021-11-05 16:42:39,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states and 3685 transitions. [2021-11-05 16:42:39,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-05 16:42:39,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:42:39,186 INFO L514 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] [2021-11-05 16:42:39,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-05 16:42:39,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-05 16:42:39,397 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:42:39,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:42:39,398 INFO L85 PathProgramCache]: Analyzing trace with hash 331004688, now seen corresponding path program 1 times [2021-11-05 16:42:39,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-05 16:42:39,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [849330046] [2021-11-05 16:42:39,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:42:39,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-05 16:42:39,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-05 16:42:39,403 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-05 16:42:39,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-05 16:42:39,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:42:39,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-05 16:42:39,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:42:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:42:39,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:42:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:42:40,058 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-05 16:42:40,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [849330046] [2021-11-05 16:42:40,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [849330046] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-05 16:42:40,058 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:42:40,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-05 16:42:40,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164062808] [2021-11-05 16:42:40,058 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-05 16:42:40,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-05 16:42:40,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-05 16:42:40,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-05 16:42:40,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:42:40,060 INFO L87 Difference]: Start difference. First operand 2515 states and 3685 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2021-11-05 16:42:40,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:42:40,452 INFO L93 Difference]: Finished difference Result 6629 states and 9733 transitions. [2021-11-05 16:42:40,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 16:42:40,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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 40 [2021-11-05 16:42:40,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:42:40,467 INFO L225 Difference]: With dead ends: 6629 [2021-11-05 16:42:40,467 INFO L226 Difference]: Without dead ends: 4167 [2021-11-05 16:42:40,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 181.17ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-05 16:42:40,471 INFO L933 BasicCegarLoop]: 2487 mSDtfsCounter, 3752 mSDsluCounter, 2586 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 126.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3752 SdHoareTripleChecker+Valid, 5073 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.52ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 143.65ms IncrementalHoareTripleChecker+Time [2021-11-05 16:42:40,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3752 Valid, 5073 Invalid, 24 Unknown, 0 Unchecked, 9.52ms Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 143.65ms Time] [2021-11-05 16:42:40,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4167 states. [2021-11-05 16:42:40,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4167 to 2518. [2021-11-05 16:42:40,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2518 states, 2517 states have (on average 1.464839094159714) internal successors, (3687), 2517 states have internal predecessors, (3687), 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) [2021-11-05 16:42:40,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2518 states to 2518 states and 3687 transitions. [2021-11-05 16:42:40,559 INFO L78 Accepts]: Start accepts. Automaton has 2518 states and 3687 transitions. Word has length 40 [2021-11-05 16:42:40,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:42:40,559 INFO L470 AbstractCegarLoop]: Abstraction has 2518 states and 3687 transitions. [2021-11-05 16:42:40,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2021-11-05 16:42:40,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2518 states and 3687 transitions. [2021-11-05 16:42:40,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-05 16:42:40,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:42:40,565 INFO L514 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] [2021-11-05 16:42:40,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-05 16:42:40,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-05 16:42:40,776 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:42:40,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:42:40,777 INFO L85 PathProgramCache]: Analyzing trace with hash -349053682, now seen corresponding path program 1 times [2021-11-05 16:42:40,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-05 16:42:40,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8723568] [2021-11-05 16:42:40,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:42:40,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-05 16:42:40,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-05 16:42:40,779 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-05 16:42:40,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-05 16:42:41,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:42:41,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-05 16:42:41,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:42:41,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:42:41,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:42:41,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:42:41,671 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-05 16:42:41,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8723568] [2021-11-05 16:42:41,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8723568] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-05 16:42:41,672 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:42:41,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-05 16:42:41,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060803878] [2021-11-05 16:42:41,672 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-05 16:42:41,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-05 16:42:41,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-05 16:42:41,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-05 16:42:41,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-05 16:42:41,673 INFO L87 Difference]: Start difference. First operand 2518 states and 3687 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 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) [2021-11-05 16:42:43,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:42:43,305 INFO L93 Difference]: Finished difference Result 7446 states and 10934 transitions. [2021-11-05 16:42:43,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 16:42:43,306 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 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 40 [2021-11-05 16:42:43,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:42:43,320 INFO L225 Difference]: With dead ends: 7446 [2021-11-05 16:42:43,320 INFO L226 Difference]: Without dead ends: 4975 [2021-11-05 16:42:43,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 271.09ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-05 16:42:43,328 INFO L933 BasicCegarLoop]: 1227 mSDtfsCounter, 1261 mSDsluCounter, 3616 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1257.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1261 SdHoareTripleChecker+Valid, 4843 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.29ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1354.71ms IncrementalHoareTripleChecker+Time [2021-11-05 16:42:43,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1261 Valid, 4843 Invalid, 263 Unknown, 0 Unchecked, 8.29ms Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 1354.71ms Time] [2021-11-05 16:42:43,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4975 states. [2021-11-05 16:42:43,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4975 to 4831. [2021-11-05 16:42:43,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4831 states, 4830 states have (on average 1.4737060041407868) internal successors, (7118), 4830 states have internal predecessors, (7118), 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) [2021-11-05 16:42:43,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4831 states to 4831 states and 7118 transitions. [2021-11-05 16:42:43,473 INFO L78 Accepts]: Start accepts. Automaton has 4831 states and 7118 transitions. Word has length 40 [2021-11-05 16:42:43,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:42:43,474 INFO L470 AbstractCegarLoop]: Abstraction has 4831 states and 7118 transitions. [2021-11-05 16:42:43,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 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) [2021-11-05 16:42:43,475 INFO L276 IsEmpty]: Start isEmpty. Operand 4831 states and 7118 transitions. [2021-11-05 16:42:43,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-05 16:42:43,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:42:43,479 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:42:43,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-05 16:42:43,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-05 16:42:43,690 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:42:43,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:42:43,690 INFO L85 PathProgramCache]: Analyzing trace with hash 2050141973, now seen corresponding path program 1 times [2021-11-05 16:42:43,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-05 16:42:43,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248644641] [2021-11-05 16:42:43,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:42:43,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-05 16:42:43,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-05 16:42:43,692 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-05 16:42:43,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-05 16:42:44,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:42:44,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-05 16:42:44,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:42:44,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:42:44,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:42:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:42:44,693 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-05 16:42:44,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248644641] [2021-11-05 16:42:44,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248644641] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-05 16:42:44,693 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:42:44,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-05 16:42:44,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304623399] [2021-11-05 16:42:44,693 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-05 16:42:44,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:42:44,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-05 16:42:44,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:42:44,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:42:44,694 INFO L87 Difference]: Start difference. First operand 4831 states and 7118 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2021-11-05 16:42:45,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:42:45,102 INFO L93 Difference]: Finished difference Result 11795 states and 17437 transitions. [2021-11-05 16:42:45,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:42:45,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 69 [2021-11-05 16:42:45,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:42:45,124 INFO L225 Difference]: With dead ends: 11795 [2021-11-05 16:42:45,124 INFO L226 Difference]: Without dead ends: 7017 [2021-11-05 16:42:45,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.81ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:42:45,133 INFO L933 BasicCegarLoop]: 1297 mSDtfsCounter, 629 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 222.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 2486 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.73ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 246.88ms IncrementalHoareTripleChecker+Time [2021-11-05 16:42:45,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [629 Valid, 2486 Invalid, 41 Unknown, 0 Unchecked, 2.73ms Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 246.88ms Time] [2021-11-05 16:42:45,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7017 states. [2021-11-05 16:42:45,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7017 to 6991. [2021-11-05 16:42:45,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6991 states, 6990 states have (on average 1.4804005722460658) internal successors, (10348), 6990 states have internal predecessors, (10348), 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) [2021-11-05 16:42:45,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6991 states to 6991 states and 10348 transitions. [2021-11-05 16:42:45,337 INFO L78 Accepts]: Start accepts. Automaton has 6991 states and 10348 transitions. Word has length 69 [2021-11-05 16:42:45,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:42:45,338 INFO L470 AbstractCegarLoop]: Abstraction has 6991 states and 10348 transitions. [2021-11-05 16:42:45,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2021-11-05 16:42:45,339 INFO L276 IsEmpty]: Start isEmpty. Operand 6991 states and 10348 transitions. [2021-11-05 16:42:45,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-05 16:42:45,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:42:45,345 INFO L514 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] [2021-11-05 16:42:45,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-05 16:42:45,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-05 16:42:45,561 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:42:45,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:42:45,562 INFO L85 PathProgramCache]: Analyzing trace with hash -643253754, now seen corresponding path program 1 times [2021-11-05 16:42:45,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-05 16:42:45,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1849773292] [2021-11-05 16:42:45,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:42:45,563 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-05 16:42:45,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-05 16:42:45,564 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-05 16:42:45,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-05 16:42:45,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:42:45,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-05 16:42:45,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:42:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:42:46,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:42:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:42:46,628 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-05 16:42:46,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1849773292] [2021-11-05 16:42:46,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1849773292] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-05 16:42:46,628 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:42:46,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-05 16:42:46,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548074427] [2021-11-05 16:42:46,629 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-05 16:42:46,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:42:46,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-05 16:42:46,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:42:46,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:42:46,630 INFO L87 Difference]: Start difference. First operand 6991 states and 10348 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) [2021-11-05 16:42:46,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:42:46,949 INFO L93 Difference]: Finished difference Result 16727 states and 24734 transitions. [2021-11-05 16:42:46,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:42:46,949 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 [2021-11-05 16:42:46,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:42:46,989 INFO L225 Difference]: With dead ends: 16727 [2021-11-05 16:42:46,989 INFO L226 Difference]: Without dead ends: 9789 [2021-11-05 16:42:47,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.69ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:42:47,001 INFO L933 BasicCegarLoop]: 1953 mSDtfsCounter, 747 mSDsluCounter, 1219 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 3172 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.61ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 91.49ms IncrementalHoareTripleChecker+Time [2021-11-05 16:42:47,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [747 Valid, 3172 Invalid, 11 Unknown, 0 Unchecked, 2.61ms Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 91.49ms Time] [2021-11-05 16:42:47,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9789 states. [2021-11-05 16:42:47,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9789 to 9760. [2021-11-05 16:42:47,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9760 states, 9759 states have (on average 1.4756634901116918) internal successors, (14401), 9759 states have internal predecessors, (14401), 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) [2021-11-05 16:42:47,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9760 states to 9760 states and 14401 transitions. [2021-11-05 16:42:47,293 INFO L78 Accepts]: Start accepts. Automaton has 9760 states and 14401 transitions. Word has length 75 [2021-11-05 16:42:47,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:42:47,294 INFO L470 AbstractCegarLoop]: Abstraction has 9760 states and 14401 transitions. [2021-11-05 16:42:47,294 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) [2021-11-05 16:42:47,294 INFO L276 IsEmpty]: Start isEmpty. Operand 9760 states and 14401 transitions. [2021-11-05 16:42:47,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-05 16:42:47,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:42:47,303 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:42:47,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-05 16:42:47,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-05 16:42:47,520 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:42:47,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:42:47,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1358903704, now seen corresponding path program 1 times [2021-11-05 16:42:47,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-05 16:42:47,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699514879] [2021-11-05 16:42:47,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:42:47,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-05 16:42:47,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-05 16:42:47,522 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-05 16:42:47,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-05 16:42:47,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:42:47,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-05 16:42:47,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:42:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:42:48,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:42:48,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:42:48,632 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-05 16:42:48,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699514879] [2021-11-05 16:42:48,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699514879] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-05 16:42:48,632 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:42:48,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-05 16:42:48,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676538582] [2021-11-05 16:42:48,632 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-05 16:42:48,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:42:48,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-05 16:42:48,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:42:48,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:42:48,634 INFO L87 Difference]: Start difference. First operand 9760 states and 14401 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2021-11-05 16:42:49,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:42:49,653 INFO L93 Difference]: Finished difference Result 24595 states and 36627 transitions. [2021-11-05 16:42:49,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 16:42:49,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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 83 [2021-11-05 16:42:49,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:42:49,685 INFO L225 Difference]: With dead ends: 24595 [2021-11-05 16:42:49,685 INFO L226 Difference]: Without dead ends: 14888 [2021-11-05 16:42:49,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.72ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:42:49,700 INFO L933 BasicCegarLoop]: 1311 mSDtfsCounter, 2143 mSDsluCounter, 1667 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 632.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2143 SdHoareTripleChecker+Valid, 2978 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.13ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 684.32ms IncrementalHoareTripleChecker+Time [2021-11-05 16:42:49,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2143 Valid, 2978 Invalid, 109 Unknown, 0 Unchecked, 4.13ms Time], IncrementalHoareTripleChecker [46 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 684.32ms Time] [2021-11-05 16:42:49,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14888 states. [2021-11-05 16:42:50,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14888 to 14836. [2021-11-05 16:42:50,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14836 states, 14835 states have (on average 1.4816986855409504) internal successors, (21981), 14835 states have internal predecessors, (21981), 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) [2021-11-05 16:42:50,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14836 states to 14836 states and 21981 transitions. [2021-11-05 16:42:50,095 INFO L78 Accepts]: Start accepts. Automaton has 14836 states and 21981 transitions. Word has length 83 [2021-11-05 16:42:50,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:42:50,096 INFO L470 AbstractCegarLoop]: Abstraction has 14836 states and 21981 transitions. [2021-11-05 16:42:50,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2021-11-05 16:42:50,096 INFO L276 IsEmpty]: Start isEmpty. Operand 14836 states and 21981 transitions. [2021-11-05 16:42:50,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-05 16:42:50,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:42:50,105 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:42:50,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-05 16:42:50,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-05 16:42:50,315 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:42:50,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:42:50,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1475894567, now seen corresponding path program 1 times [2021-11-05 16:42:50,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-05 16:42:50,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1236007124] [2021-11-05 16:42:50,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:42:50,316 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-05 16:42:50,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-05 16:42:50,317 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-05 16:42:50,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-05 16:42:50,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:42:50,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-05 16:42:50,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:42:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 16:42:50,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:42:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 16:42:51,120 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-05 16:42:51,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1236007124] [2021-11-05 16:42:51,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1236007124] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-05 16:42:51,120 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:42:51,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-05 16:42:51,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558564009] [2021-11-05 16:42:51,120 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-05 16:42:51,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:42:51,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-05 16:42:51,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:42:51,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:42:51,121 INFO L87 Difference]: Start difference. First operand 14836 states and 21981 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2021-11-05 16:42:52,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:42:52,049 INFO L93 Difference]: Finished difference Result 35912 states and 53342 transitions. [2021-11-05 16:42:52,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:42:52,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-05 16:42:52,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:42:52,113 INFO L225 Difference]: With dead ends: 35912 [2021-11-05 16:42:52,113 INFO L226 Difference]: Without dead ends: 28317 [2021-11-05 16:42:52,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.11ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:42:52,129 INFO L933 BasicCegarLoop]: 2321 mSDtfsCounter, 1130 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 248.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1130 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.78ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 285.61ms IncrementalHoareTripleChecker+Time [2021-11-05 16:42:52,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1130 Valid, 3504 Invalid, 73 Unknown, 0 Unchecked, 4.78ms Time], IncrementalHoareTripleChecker [37 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 285.61ms Time] [2021-11-05 16:42:52,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28317 states. [2021-11-05 16:42:52,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28317 to 15028. [2021-11-05 16:42:52,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15028 states, 15027 states have (on average 1.4755440207626274) internal successors, (22173), 15027 states have internal predecessors, (22173), 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) [2021-11-05 16:42:52,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15028 states to 15028 states and 22173 transitions. [2021-11-05 16:42:52,625 INFO L78 Accepts]: Start accepts. Automaton has 15028 states and 22173 transitions. Word has length 84 [2021-11-05 16:42:52,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:42:52,625 INFO L470 AbstractCegarLoop]: Abstraction has 15028 states and 22173 transitions. [2021-11-05 16:42:52,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2021-11-05 16:42:52,625 INFO L276 IsEmpty]: Start isEmpty. Operand 15028 states and 22173 transitions. [2021-11-05 16:42:52,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-05 16:42:52,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:42:52,634 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:42:52,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-05 16:42:52,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-05 16:42:52,848 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:42:52,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:42:52,848 INFO L85 PathProgramCache]: Analyzing trace with hash 341292008, now seen corresponding path program 1 times [2021-11-05 16:42:52,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-05 16:42:52,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519165000] [2021-11-05 16:42:52,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:42:52,849 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-05 16:42:52,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-05 16:42:52,850 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-05 16:42:52,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-05 16:42:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:42:53,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-05 16:42:53,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:42:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 16:42:53,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:42:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 16:42:54,455 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-05 16:42:54,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519165000] [2021-11-05 16:42:54,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1519165000] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-05 16:42:54,455 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:42:54,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-05 16:42:54,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861920310] [2021-11-05 16:42:54,456 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-05 16:42:54,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-05 16:42:54,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-05 16:42:54,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-05 16:42:54,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-05 16:42:54,457 INFO L87 Difference]: Start difference. First operand 15028 states and 22173 transitions. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:42:58,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:42:58,945 INFO L93 Difference]: Finished difference Result 43004 states and 63555 transitions. [2021-11-05 16:42:58,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 16:42:58,946 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-05 16:42:58,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:42:59,001 INFO L225 Difference]: With dead ends: 43004 [2021-11-05 16:42:59,001 INFO L226 Difference]: Without dead ends: 28029 [2021-11-05 16:42:59,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 119.72ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-05 16:42:59,020 INFO L933 BasicCegarLoop]: 2313 mSDtfsCounter, 3217 mSDsluCounter, 7767 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3381.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3217 SdHoareTripleChecker+Valid, 10080 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.08ms SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3642.70ms IncrementalHoareTripleChecker+Time [2021-11-05 16:42:59,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3217 Valid, 10080 Invalid, 497 Unknown, 0 Unchecked, 12.08ms Time], IncrementalHoareTripleChecker [47 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 3642.70ms Time] [2021-11-05 16:42:59,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28029 states. [2021-11-05 16:42:59,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28029 to 14398. [2021-11-05 16:42:59,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14398 states, 14397 states have (on average 1.4649579773563937) internal successors, (21091), 14397 states have internal predecessors, (21091), 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) [2021-11-05 16:42:59,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14398 states to 14398 states and 21091 transitions. [2021-11-05 16:42:59,511 INFO L78 Accepts]: Start accepts. Automaton has 14398 states and 21091 transitions. Word has length 86 [2021-11-05 16:42:59,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:42:59,511 INFO L470 AbstractCegarLoop]: Abstraction has 14398 states and 21091 transitions. [2021-11-05 16:42:59,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:42:59,511 INFO L276 IsEmpty]: Start isEmpty. Operand 14398 states and 21091 transitions. [2021-11-05 16:42:59,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-05 16:42:59,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:42:59,525 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:42:59,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-05 16:42:59,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-05 16:42:59,740 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:42:59,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:42:59,741 INFO L85 PathProgramCache]: Analyzing trace with hash -265952138, now seen corresponding path program 1 times [2021-11-05 16:42:59,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-05 16:42:59,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497446111] [2021-11-05 16:42:59,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:42:59,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-05 16:42:59,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-05 16:42:59,742 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-05 16:42:59,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-05 16:43:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:43:00,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-05 16:43:00,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:43:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-05 16:43:00,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:43:01,090 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-05 16:43:01,090 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-05 16:43:01,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497446111] [2021-11-05 16:43:01,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497446111] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-05 16:43:01,090 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:43:01,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-05 16:43:01,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442907446] [2021-11-05 16:43:01,090 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-05 16:43:01,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-05 16:43:01,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-05 16:43:01,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-05 16:43:01,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-05 16:43:01,092 INFO L87 Difference]: Start difference. First operand 14398 states and 21091 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 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) [2021-11-05 16:43:02,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:43:02,324 INFO L93 Difference]: Finished difference Result 36643 states and 53395 transitions. [2021-11-05 16:43:02,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-05 16:43:02,327 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 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 [2021-11-05 16:43:02,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:43:02,363 INFO L225 Difference]: With dead ends: 36643 [2021-11-05 16:43:02,363 INFO L226 Difference]: Without dead ends: 22298 [2021-11-05 16:43:02,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 190.85ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-05 16:43:02,382 INFO L933 BasicCegarLoop]: 2065 mSDtfsCounter, 3822 mSDsluCounter, 4121 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 418.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3822 SdHoareTripleChecker+Valid, 6186 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.89ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 437.84ms IncrementalHoareTripleChecker+Time [2021-11-05 16:43:02,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3822 Valid, 6186 Invalid, 17 Unknown, 0 Unchecked, 5.89ms Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 437.84ms Time] [2021-11-05 16:43:02,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22298 states. [2021-11-05 16:43:02,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22298 to 14422. [2021-11-05 16:43:02,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14422 states, 14421 states have (on average 1.4641841758546563) internal successors, (21115), 14421 states have internal predecessors, (21115), 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) [2021-11-05 16:43:02,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14422 states to 14422 states and 21115 transitions. [2021-11-05 16:43:02,939 INFO L78 Accepts]: Start accepts. Automaton has 14422 states and 21115 transitions. Word has length 119 [2021-11-05 16:43:02,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:43:02,939 INFO L470 AbstractCegarLoop]: Abstraction has 14422 states and 21115 transitions. [2021-11-05 16:43:02,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 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) [2021-11-05 16:43:02,940 INFO L276 IsEmpty]: Start isEmpty. Operand 14422 states and 21115 transitions. [2021-11-05 16:43:02,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-05 16:43:02,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:43:02,951 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:43:02,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-05 16:43:03,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-05 16:43:03,164 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:43:03,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:43:03,165 INFO L85 PathProgramCache]: Analyzing trace with hash 464660825, now seen corresponding path program 1 times [2021-11-05 16:43:03,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-05 16:43:03,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1200537416] [2021-11-05 16:43:03,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:43:03,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-05 16:43:03,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-05 16:43:03,166 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-05 16:43:03,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-05 16:43:03,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:43:03,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-05 16:43:03,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:43:04,145 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-05 16:43:04,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:43:04,794 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-05 16:43:04,794 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-05 16:43:04,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1200537416] [2021-11-05 16:43:04,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1200537416] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-05 16:43:04,795 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:43:04,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-05 16:43:04,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140272697] [2021-11-05 16:43:04,799 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-05 16:43:04,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-05 16:43:04,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-05 16:43:04,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-05 16:43:04,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-05 16:43:04,800 INFO L87 Difference]: Start difference. First operand 14422 states and 21115 transitions. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 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) [2021-11-05 16:43:07,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:43:07,349 INFO L93 Difference]: Finished difference Result 43979 states and 64011 transitions. [2021-11-05 16:43:07,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-05 16:43:07,350 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 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 126 [2021-11-05 16:43:07,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:43:07,402 INFO L225 Difference]: With dead ends: 43979 [2021-11-05 16:43:07,402 INFO L226 Difference]: Without dead ends: 29610 [2021-11-05 16:43:07,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 866.87ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-11-05 16:43:07,422 INFO L933 BasicCegarLoop]: 2838 mSDtfsCounter, 5306 mSDsluCounter, 12476 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 785.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5306 SdHoareTripleChecker+Valid, 15314 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.15ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 853.51ms IncrementalHoareTripleChecker+Time [2021-11-05 16:43:07,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5306 Valid, 15314 Invalid, 94 Unknown, 0 Unchecked, 11.15ms Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 853.51ms Time] [2021-11-05 16:43:07,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29610 states. [2021-11-05 16:43:08,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29610 to 14422. [2021-11-05 16:43:08,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14422 states, 14421 states have (on average 1.4641841758546563) internal successors, (21115), 14421 states have internal predecessors, (21115), 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) [2021-11-05 16:43:08,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14422 states to 14422 states and 21115 transitions. [2021-11-05 16:43:08,123 INFO L78 Accepts]: Start accepts. Automaton has 14422 states and 21115 transitions. Word has length 126 [2021-11-05 16:43:08,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:43:08,123 INFO L470 AbstractCegarLoop]: Abstraction has 14422 states and 21115 transitions. [2021-11-05 16:43:08,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 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) [2021-11-05 16:43:08,124 INFO L276 IsEmpty]: Start isEmpty. Operand 14422 states and 21115 transitions. [2021-11-05 16:43:08,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-05 16:43:08,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:43:08,134 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:43:08,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-05 16:43:08,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-05 16:43:08,338 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:43:08,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:43:08,339 INFO L85 PathProgramCache]: Analyzing trace with hash -443712689, now seen corresponding path program 1 times [2021-11-05 16:43:08,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-05 16:43:08,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846946539] [2021-11-05 16:43:08,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:43:08,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-05 16:43:08,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-05 16:43:08,341 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-05 16:43:08,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-05 16:43:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:43:08,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-05 16:43:08,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:43:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-05 16:43:09,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:43:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-05 16:43:10,856 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-05 16:43:10,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846946539] [2021-11-05 16:43:10,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846946539] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-05 16:43:10,856 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:43:10,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-05 16:43:10,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445875584] [2021-11-05 16:43:10,857 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-05 16:43:10,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-05 16:43:10,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-05 16:43:10,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-05 16:43:10,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-05 16:43:10,858 INFO L87 Difference]: Start difference. First operand 14422 states and 21115 transitions. Second operand has 12 states, 12 states have (on average 12.083333333333334) internal successors, (145), 12 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:43:14,602 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 16:43:16,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:43:16,513 INFO L93 Difference]: Finished difference Result 53690 states and 78603 transitions. [2021-11-05 16:43:16,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-05 16:43:16,515 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 12.083333333333334) internal successors, (145), 12 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-05 16:43:16,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:43:16,574 INFO L225 Difference]: With dead ends: 53690 [2021-11-05 16:43:16,575 INFO L226 Difference]: Without dead ends: 39321 [2021-11-05 16:43:16,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1124.23ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-05 16:43:16,596 INFO L933 BasicCegarLoop]: 2470 mSDtfsCounter, 11597 mSDsluCounter, 22739 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3479.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11597 SdHoareTripleChecker+Valid, 25209 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.45ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3575.46ms IncrementalHoareTripleChecker+Time [2021-11-05 16:43:16,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11597 Valid, 25209 Invalid, 101 Unknown, 0 Unchecked, 19.45ms Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 3575.46ms Time] [2021-11-05 16:43:16,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39321 states. [2021-11-05 16:43:17,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39321 to 14482. [2021-11-05 16:43:17,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14482 states, 14481 states have (on average 1.4622608935846972) internal successors, (21175), 14481 states have internal predecessors, (21175), 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) [2021-11-05 16:43:17,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14482 states to 14482 states and 21175 transitions. [2021-11-05 16:43:17,461 INFO L78 Accepts]: Start accepts. Automaton has 14482 states and 21175 transitions. Word has length 141 [2021-11-05 16:43:17,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:43:17,462 INFO L470 AbstractCegarLoop]: Abstraction has 14482 states and 21175 transitions. [2021-11-05 16:43:17,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.083333333333334) internal successors, (145), 12 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:43:17,462 INFO L276 IsEmpty]: Start isEmpty. Operand 14482 states and 21175 transitions. [2021-11-05 16:43:17,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-05 16:43:17,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:43:17,471 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:43:17,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-05 16:43:17,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-05 16:43:17,678 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:43:17,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:43:17,679 INFO L85 PathProgramCache]: Analyzing trace with hash 549404179, now seen corresponding path program 1 times [2021-11-05 16:43:17,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-05 16:43:17,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1643626252] [2021-11-05 16:43:17,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:43:17,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-05 16:43:17,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-05 16:43:17,681 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-05 16:43:17,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-05 16:43:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:43:18,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-05 16:43:18,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:43:18,874 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-05 16:43:18,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:43:19,317 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-05 16:43:19,317 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-05 16:43:19,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1643626252] [2021-11-05 16:43:19,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1643626252] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-05 16:43:19,317 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:43:19,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-05 16:43:19,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922923224] [2021-11-05 16:43:19,318 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-05 16:43:19,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-05 16:43:19,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-05 16:43:19,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-05 16:43:19,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:43:19,319 INFO L87 Difference]: Start difference. First operand 14482 states and 21175 transitions. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 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) [2021-11-05 16:43:22,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:43:22,566 INFO L93 Difference]: Finished difference Result 66222 states and 96797 transitions. [2021-11-05 16:43:22,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-05 16:43:22,567 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 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 143 [2021-11-05 16:43:22,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:43:22,704 INFO L225 Difference]: With dead ends: 66222 [2021-11-05 16:43:22,704 INFO L226 Difference]: Without dead ends: 51793 [2021-11-05 16:43:22,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 309.68ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-05 16:43:22,724 INFO L933 BasicCegarLoop]: 3437 mSDtfsCounter, 3713 mSDsluCounter, 6753 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 645.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3713 SdHoareTripleChecker+Valid, 10190 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.48ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 719.77ms IncrementalHoareTripleChecker+Time [2021-11-05 16:43:22,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3713 Valid, 10190 Invalid, 98 Unknown, 0 Unchecked, 9.48ms Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 719.77ms Time] [2021-11-05 16:43:22,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51793 states. [2021-11-05 16:43:23,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51793 to 14530. [2021-11-05 16:43:23,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14530 states, 14529 states have (on average 1.4607337050037856) internal successors, (21223), 14529 states have internal predecessors, (21223), 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) [2021-11-05 16:43:23,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14530 states to 14530 states and 21223 transitions. [2021-11-05 16:43:23,742 INFO L78 Accepts]: Start accepts. Automaton has 14530 states and 21223 transitions. Word has length 143 [2021-11-05 16:43:23,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:43:23,742 INFO L470 AbstractCegarLoop]: Abstraction has 14530 states and 21223 transitions. [2021-11-05 16:43:23,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 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) [2021-11-05 16:43:23,743 INFO L276 IsEmpty]: Start isEmpty. Operand 14530 states and 21223 transitions. [2021-11-05 16:43:23,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-05 16:43:23,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:43:23,752 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:43:23,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-05 16:43:23,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-05 16:43:23,953 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:43:23,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:43:23,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1758105866, now seen corresponding path program 1 times [2021-11-05 16:43:23,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-05 16:43:23,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859477408] [2021-11-05 16:43:23,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:43:23,954 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-05 16:43:23,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-05 16:43:23,955 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-05 16:43:23,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-05 16:43:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:43:24,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-05 16:43:24,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:43:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-05 16:43:27,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:43:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-05 16:43:29,150 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-05 16:43:29,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859477408] [2021-11-05 16:43:29,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859477408] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-05 16:43:29,151 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:43:29,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-05 16:43:29,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499804700] [2021-11-05 16:43:29,151 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-05 16:43:29,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-05 16:43:29,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-05 16:43:29,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-05 16:43:29,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-05 16:43:29,152 INFO L87 Difference]: Start difference. First operand 14530 states and 21223 transitions. Second operand has 11 states, 11 states have (on average 19.90909090909091) internal successors, (219), 11 states have internal predecessors, (219), 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) [2021-11-05 16:43:39,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:43:39,082 INFO L93 Difference]: Finished difference Result 123871 states and 180787 transitions. [2021-11-05 16:43:39,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-05 16:43:39,084 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 19.90909090909091) internal successors, (219), 11 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-05 16:43:39,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:43:39,290 INFO L225 Difference]: With dead ends: 123871 [2021-11-05 16:43:39,291 INFO L226 Difference]: Without dead ends: 109394 [2021-11-05 16:43:39,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1760.28ms TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2021-11-05 16:43:39,329 INFO L933 BasicCegarLoop]: 2984 mSDtfsCounter, 16681 mSDsluCounter, 19241 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1699.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16681 SdHoareTripleChecker+Valid, 22225 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.37ms SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1840.59ms IncrementalHoareTripleChecker+Time [2021-11-05 16:43:39,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16681 Valid, 22225 Invalid, 335 Unknown, 0 Unchecked, 31.37ms Time], IncrementalHoareTripleChecker [47 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 1840.59ms Time] [2021-11-05 16:43:39,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109394 states. [2021-11-05 16:43:42,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109394 to 30574. [2021-11-05 16:43:42,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30574 states, 30573 states have (on average 1.4598829032152554) internal successors, (44633), 30573 states have internal predecessors, (44633), 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) [2021-11-05 16:43:42,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30574 states to 30574 states and 44633 transitions. [2021-11-05 16:43:42,202 INFO L78 Accepts]: Start accepts. Automaton has 30574 states and 44633 transitions. Word has length 143 [2021-11-05 16:43:42,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:43:42,202 INFO L470 AbstractCegarLoop]: Abstraction has 30574 states and 44633 transitions. [2021-11-05 16:43:42,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.90909090909091) internal successors, (219), 11 states have internal predecessors, (219), 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) [2021-11-05 16:43:42,202 INFO L276 IsEmpty]: Start isEmpty. Operand 30574 states and 44633 transitions. [2021-11-05 16:43:42,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-05 16:43:42,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:43:42,226 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:43:42,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-05 16:43:42,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-05 16:43:42,434 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:43:42,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:43:42,435 INFO L85 PathProgramCache]: Analyzing trace with hash 691494264, now seen corresponding path program 1 times [2021-11-05 16:43:42,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-05 16:43:42,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612182815] [2021-11-05 16:43:42,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:43:42,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-05 16:43:42,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-05 16:43:42,437 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-05 16:43:42,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-05 16:43:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:43:43,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-05 16:43:43,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:43:43,563 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-05 16:43:43,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:43:43,887 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-05 16:43:43,887 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-05 16:43:43,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612182815] [2021-11-05 16:43:43,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612182815] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-05 16:43:43,888 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:43:43,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-05 16:43:43,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705147274] [2021-11-05 16:43:43,888 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-05 16:43:43,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:43:43,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-05 16:43:43,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:43:43,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:43:43,889 INFO L87 Difference]: Start difference. First operand 30574 states and 44633 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 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) [2021-11-05 16:43:53,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:43:53,480 INFO L93 Difference]: Finished difference Result 151146 states and 220879 transitions. [2021-11-05 16:43:53,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 16:43:53,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 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 143 [2021-11-05 16:43:53,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:43:53,696 INFO L225 Difference]: With dead ends: 151146 [2021-11-05 16:43:53,696 INFO L226 Difference]: Without dead ends: 120652 [2021-11-05 16:43:53,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 150.33ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:43:53,735 INFO L933 BasicCegarLoop]: 2561 mSDtfsCounter, 3663 mSDsluCounter, 3849 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 384.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3663 SdHoareTripleChecker+Valid, 6410 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.43ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 413.63ms IncrementalHoareTripleChecker+Time [2021-11-05 16:43:53,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3663 Valid, 6410 Invalid, 83 Unknown, 0 Unchecked, 10.43ms Time], IncrementalHoareTripleChecker [13 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 413.63ms Time] [2021-11-05 16:43:53,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120652 states. [2021-11-05 16:43:56,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120652 to 30646. [2021-11-05 16:43:56,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30646 states, 30645 states have (on average 1.4588024147495513) internal successors, (44705), 30645 states have internal predecessors, (44705), 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) [2021-11-05 16:43:56,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30646 states to 30646 states and 44705 transitions. [2021-11-05 16:43:56,763 INFO L78 Accepts]: Start accepts. Automaton has 30646 states and 44705 transitions. Word has length 143 [2021-11-05 16:43:56,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:43:56,764 INFO L470 AbstractCegarLoop]: Abstraction has 30646 states and 44705 transitions. [2021-11-05 16:43:56,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 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) [2021-11-05 16:43:56,764 INFO L276 IsEmpty]: Start isEmpty. Operand 30646 states and 44705 transitions. [2021-11-05 16:43:56,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-05 16:43:56,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:43:56,783 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:43:56,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-05 16:43:56,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-05 16:43:56,999 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:43:57,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:43:57,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1910960719, now seen corresponding path program 1 times [2021-11-05 16:43:57,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-05 16:43:57,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937776824] [2021-11-05 16:43:57,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:43:57,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-05 16:43:57,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-05 16:43:57,002 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-05 16:43:57,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-05 16:43:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:43:57,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-05 16:43:57,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:43:58,820 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-05 16:43:58,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:44:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-05 16:44:00,130 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-05 16:44:00,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937776824] [2021-11-05 16:44:00,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937776824] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-05 16:44:00,130 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:44:00,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 16 [2021-11-05 16:44:00,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393593841] [2021-11-05 16:44:00,130 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-05 16:44:00,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-05 16:44:00,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-05 16:44:00,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-05 16:44:00,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-05 16:44:00,131 INFO L87 Difference]: Start difference. First operand 30646 states and 44705 transitions. Second operand has 16 states, 16 states have (on average 9.375) internal successors, (150), 16 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)