./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 173e3943 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_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-dev-173e394 [2021-11-06 14:40:29,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 14:40:29,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 14:40:29,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 14:40:29,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 14:40:29,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 14:40:29,966 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 14:40:29,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 14:40:29,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 14:40:29,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 14:40:29,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 14:40:29,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 14:40:29,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 14:40:29,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 14:40:29,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 14:40:29,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 14:40:29,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 14:40:29,988 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 14:40:29,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 14:40:29,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 14:40:29,991 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 14:40:29,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 14:40:29,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 14:40:29,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 14:40:29,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 14:40:29,995 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 14:40:29,996 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 14:40:29,996 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 14:40:29,997 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 14:40:29,997 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 14:40:29,998 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 14:40:29,998 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 14:40:29,999 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 14:40:29,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 14:40:30,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 14:40:30,000 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 14:40:30,001 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 14:40:30,001 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 14:40:30,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 14:40:30,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 14:40:30,003 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 14:40:30,004 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 14:40:30,018 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 14:40:30,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 14:40:30,019 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 14:40:30,019 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 14:40:30,020 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 14:40:30,020 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 14:40:30,020 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 14:40:30,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 14:40:30,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 14:40:30,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 14:40:30,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 14:40:30,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 14:40:30,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 14:40:30,021 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 14:40:30,021 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 14:40:30,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 14:40:30,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 14:40:30,022 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 14:40:30,022 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 14:40:30,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:40:30,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 14:40:30,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 14:40:30,023 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 14:40:30,023 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 14:40:30,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 14:40:30,023 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 14:40:30,023 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 14:40:30,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 14:40:30,024 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 14:40:30,024 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b [2021-11-06 14:40:30,190 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 14:40:30,207 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 14:40:30,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 14:40:30,210 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 14:40:30,210 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 14:40:30,211 INFO L432 ainManager$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 [2021-11-06 14:40:30,282 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0399ce9e/aa2f430fe2c24650b34a0cea803ad10e/FLAG16e092c9a [2021-11-06 14:40:30,836 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 14:40:30,836 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 [2021-11-06 14:40:30,866 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0399ce9e/aa2f430fe2c24650b34a0cea803ad10e/FLAG16e092c9a [2021-11-06 14:40:31,042 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0399ce9e/aa2f430fe2c24650b34a0cea803ad10e [2021-11-06 14:40:31,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 14:40:31,049 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 14:40:31,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 14:40:31,052 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 14:40:31,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 14:40:31,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:40:31" (1/1) ... [2021-11-06 14:40:31,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f89e4a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:40:31, skipping insertion in model container [2021-11-06 14:40:31,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:40:31" (1/1) ... [2021-11-06 14:40:31,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 14:40:31,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 14:40:31,749 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] [2021-11-06 14:40:32,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:40:32,038 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 14:40:32,170 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] [2021-11-06 14:40:32,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:40:32,330 INFO L208 MainTranslator]: Completed translation [2021-11-06 14:40:32,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:40:32 WrapperNode [2021-11-06 14:40:32,331 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 14:40:32,334 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 14:40:32,334 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 14:40:32,334 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 14:40:32,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:40:32" (1/1) ... [2021-11-06 14:40:32,395 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:40:32" (1/1) ... [2021-11-06 14:40:32,525 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 14:40:32,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 14:40:32,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 14:40:32,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 14:40:32,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:40:32" (1/1) ... [2021-11-06 14:40:32,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:40:32" (1/1) ... [2021-11-06 14:40:32,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:40:32" (1/1) ... [2021-11-06 14:40:32,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:40:32" (1/1) ... [2021-11-06 14:40:32,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:40:32" (1/1) ... [2021-11-06 14:40:32,696 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:40:32" (1/1) ... [2021-11-06 14:40:32,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:40:32" (1/1) ... [2021-11-06 14:40:32,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 14:40:32,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 14:40:32,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 14:40:32,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 14:40:32,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:40:32" (1/1) ... [2021-11-06 14:40:32,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:40:32,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:40:32,784 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-06 14:40:32,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-06 14:40:32,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 14:40:32,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 14:40:32,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 14:40:32,825 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 14:40:32,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 14:40:32,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 14:40:32,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 14:40:32,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 14:40:32,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 14:40:32,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 14:40:32,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 14:40:32,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 14:40:32,827 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 14:40:32,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 14:40:32,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 14:40:36,981 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 14:40:36,981 INFO L299 CfgBuilder]: Removed 769 assume(true) statements. [2021-11-06 14:40:36,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:40:36 BoogieIcfgContainer [2021-11-06 14:40:36,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 14:40:36,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 14:40:36,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 14:40:36,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 14:40:36,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 02:40:31" (1/3) ... [2021-11-06 14:40:36,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d44c3b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:40:36, skipping insertion in model container [2021-11-06 14:40:36,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:40:32" (2/3) ... [2021-11-06 14:40:36,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d44c3b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:40:36, skipping insertion in model container [2021-11-06 14:40:36,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:40:36" (3/3) ... [2021-11-06 14:40:36,988 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 [2021-11-06 14:40:36,991 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 14:40:36,991 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-06 14:40:37,021 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 14:40:37,024 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-06 14:40:37,024 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-06 14:40:37,042 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) [2021-11-06 14:40:37,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-06 14:40:37,047 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:40:37,048 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:40:37,048 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:40:37,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:40:37,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1898451720, now seen corresponding path program 1 times [2021-11-06 14:40:37,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:40:37,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540967560] [2021-11-06 14:40:37,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:40:37,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:40:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:37,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:40:37,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:40:37,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540967560] [2021-11-06 14:40:37,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540967560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:40:37,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:40:37,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:40:37,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367421635] [2021-11-06 14:40:37,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:40:37,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:40:37,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:40:37,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:40:37,338 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) [2021-11-06 14:40:37,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:40:37,456 INFO L93 Difference]: Finished difference Result 2608 states and 3995 transitions. [2021-11-06 14:40:37,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:40:37,458 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 [2021-11-06 14:40:37,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:40:37,487 INFO L225 Difference]: With dead ends: 2608 [2021-11-06 14:40:37,487 INFO L226 Difference]: Without dead ends: 1703 [2021-11-06 14:40:37,492 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:40:37,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-11-06 14:40:37,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1703. [2021-11-06 14:40:37,591 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) [2021-11-06 14:40:37,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 2488 transitions. [2021-11-06 14:40:37,596 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 2488 transitions. Word has length 36 [2021-11-06 14:40:37,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:40:37,596 INFO L470 AbstractCegarLoop]: Abstraction has 1703 states and 2488 transitions. [2021-11-06 14:40:37,596 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) [2021-11-06 14:40:37,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 2488 transitions. [2021-11-06 14:40:37,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-06 14:40:37,599 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:40:37,599 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:40:37,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 14:40:37,600 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:40:37,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:40:37,608 INFO L85 PathProgramCache]: Analyzing trace with hash 331004688, now seen corresponding path program 1 times [2021-11-06 14:40:37,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:40:37,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15048881] [2021-11-06 14:40:37,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:40:37,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:40:37,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:37,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:40:37,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:40:37,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15048881] [2021-11-06 14:40:37,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15048881] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:40:37,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:40:37,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:40:37,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203214862] [2021-11-06 14:40:37,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:40:37,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:40:37,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:40:37,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:40:37,709 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) [2021-11-06 14:40:37,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:40:37,955 INFO L93 Difference]: Finished difference Result 5001 states and 7337 transitions. [2021-11-06 14:40:37,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:40:37,956 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 [2021-11-06 14:40:37,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:40:37,967 INFO L225 Difference]: With dead ends: 5001 [2021-11-06 14:40:37,968 INFO L226 Difference]: Without dead ends: 3345 [2021-11-06 14:40:37,971 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:40:37,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3345 states. [2021-11-06 14:40:38,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3345 to 3249. [2021-11-06 14:40:38,033 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) [2021-11-06 14:40:38,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3249 states to 3249 states and 4780 transitions. [2021-11-06 14:40:38,040 INFO L78 Accepts]: Start accepts. Automaton has 3249 states and 4780 transitions. Word has length 40 [2021-11-06 14:40:38,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:40:38,040 INFO L470 AbstractCegarLoop]: Abstraction has 3249 states and 4780 transitions. [2021-11-06 14:40:38,041 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) [2021-11-06 14:40:38,041 INFO L276 IsEmpty]: Start isEmpty. Operand 3249 states and 4780 transitions. [2021-11-06 14:40:38,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-06 14:40:38,046 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:40:38,046 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:40:38,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 14:40:38,046 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:40:38,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:40:38,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1564766953, now seen corresponding path program 1 times [2021-11-06 14:40:38,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:40:38,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236610815] [2021-11-06 14:40:38,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:40:38,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:40:38,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:40:38,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:40:38,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236610815] [2021-11-06 14:40:38,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236610815] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:40:38,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:40:38,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:40:38,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261479275] [2021-11-06 14:40:38,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:40:38,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:40:38,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:40:38,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:40:38,148 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) [2021-11-06 14:40:38,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:40:38,272 INFO L93 Difference]: Finished difference Result 7909 states and 11681 transitions. [2021-11-06 14:40:38,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:40:38,272 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 [2021-11-06 14:40:38,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:40:38,287 INFO L225 Difference]: With dead ends: 7909 [2021-11-06 14:40:38,288 INFO L226 Difference]: Without dead ends: 4713 [2021-11-06 14:40:38,333 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:40:38,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4713 states. [2021-11-06 14:40:38,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4713 to 4693. [2021-11-06 14:40:38,413 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) [2021-11-06 14:40:38,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4693 states to 4693 states and 6938 transitions. [2021-11-06 14:40:38,423 INFO L78 Accepts]: Start accepts. Automaton has 4693 states and 6938 transitions. Word has length 69 [2021-11-06 14:40:38,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:40:38,424 INFO L470 AbstractCegarLoop]: Abstraction has 4693 states and 6938 transitions. [2021-11-06 14:40:38,424 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) [2021-11-06 14:40:38,424 INFO L276 IsEmpty]: Start isEmpty. Operand 4693 states and 6938 transitions. [2021-11-06 14:40:38,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-06 14:40:38,427 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:40:38,428 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:40:38,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 14:40:38,428 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:40:38,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:40:38,429 INFO L85 PathProgramCache]: Analyzing trace with hash 36804616, now seen corresponding path program 1 times [2021-11-06 14:40:38,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:40:38,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766838502] [2021-11-06 14:40:38,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:40:38,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:40:38,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:40:38,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:40:38,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766838502] [2021-11-06 14:40:38,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766838502] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:40:38,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:40:38,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:40:38,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711939113] [2021-11-06 14:40:38,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:40:38,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:40:38,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:40:38,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:40:38,482 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) [2021-11-06 14:40:38,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:40:38,580 INFO L93 Difference]: Finished difference Result 11205 states and 16555 transitions. [2021-11-06 14:40:38,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:40:38,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-06 14:40:38,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:40:38,601 INFO L225 Difference]: With dead ends: 11205 [2021-11-06 14:40:38,601 INFO L226 Difference]: Without dead ends: 6565 [2021-11-06 14:40:38,608 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:40:38,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6565 states. [2021-11-06 14:40:38,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6565 to 6557. [2021-11-06 14:40:38,785 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) [2021-11-06 14:40:38,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6557 states to 6557 states and 9664 transitions. [2021-11-06 14:40:38,801 INFO L78 Accepts]: Start accepts. Automaton has 6557 states and 9664 transitions. Word has length 75 [2021-11-06 14:40:38,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:40:38,802 INFO L470 AbstractCegarLoop]: Abstraction has 6557 states and 9664 transitions. [2021-11-06 14:40:38,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:40:38,802 INFO L276 IsEmpty]: Start isEmpty. Operand 6557 states and 9664 transitions. [2021-11-06 14:40:38,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-06 14:40:38,807 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:40:38,807 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:40:38,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 14:40:38,808 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:40:38,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:40:38,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1358903704, now seen corresponding path program 1 times [2021-11-06 14:40:38,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:40:38,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166219897] [2021-11-06 14:40:38,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:40:38,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:40:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:40:38,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:40:38,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166219897] [2021-11-06 14:40:38,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166219897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:40:38,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:40:38,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:40:38,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951631237] [2021-11-06 14:40:38,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:40:38,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:40:38,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:40:38,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:40:38,874 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) [2021-11-06 14:40:39,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:40:39,049 INFO L93 Difference]: Finished difference Result 14781 states and 21907 transitions. [2021-11-06 14:40:39,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:40:39,050 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 83 [2021-11-06 14:40:39,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:40:39,082 INFO L225 Difference]: With dead ends: 14781 [2021-11-06 14:40:39,083 INFO L226 Difference]: Without dead ends: 8277 [2021-11-06 14:40:39,108 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:40:39,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8277 states. [2021-11-06 14:40:39,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8277 to 8257. [2021-11-06 14:40:39,298 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) [2021-11-06 14:40:39,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8257 states to 8257 states and 12180 transitions. [2021-11-06 14:40:39,310 INFO L78 Accepts]: Start accepts. Automaton has 8257 states and 12180 transitions. Word has length 83 [2021-11-06 14:40:39,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:40:39,310 INFO L470 AbstractCegarLoop]: Abstraction has 8257 states and 12180 transitions. [2021-11-06 14:40:39,311 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) [2021-11-06 14:40:39,311 INFO L276 IsEmpty]: Start isEmpty. Operand 8257 states and 12180 transitions. [2021-11-06 14:40:39,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-06 14:40:39,314 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:40:39,314 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:40:39,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 14:40:39,315 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:40:39,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:40:39,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1475894567, now seen corresponding path program 1 times [2021-11-06 14:40:39,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:40:39,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614244224] [2021-11-06 14:40:39,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:40:39,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:40:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:39,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:40:39,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:40:39,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614244224] [2021-11-06 14:40:39,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614244224] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:40:39,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:40:39,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:40:39,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952860579] [2021-11-06 14:40:39,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:40:39,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:40:39,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:40:39,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:40:39,359 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) [2021-11-06 14:40:39,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:40:39,556 INFO L93 Difference]: Finished difference Result 19919 states and 29468 transitions. [2021-11-06 14:40:39,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:40:39,557 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 [2021-11-06 14:40:39,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:40:39,582 INFO L225 Difference]: With dead ends: 19919 [2021-11-06 14:40:39,583 INFO L226 Difference]: Without dead ends: 15701 [2021-11-06 14:40:39,591 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:40:39,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15701 states. [2021-11-06 14:40:39,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15701 to 8369. [2021-11-06 14:40:39,833 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) [2021-11-06 14:40:39,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8369 states to 8369 states and 12292 transitions. [2021-11-06 14:40:39,845 INFO L78 Accepts]: Start accepts. Automaton has 8369 states and 12292 transitions. Word has length 84 [2021-11-06 14:40:39,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:40:39,845 INFO L470 AbstractCegarLoop]: Abstraction has 8369 states and 12292 transitions. [2021-11-06 14:40:39,846 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) [2021-11-06 14:40:39,846 INFO L276 IsEmpty]: Start isEmpty. Operand 8369 states and 12292 transitions. [2021-11-06 14:40:39,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-06 14:40:39,850 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:40:39,850 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:40:39,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 14:40:39,850 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:40:39,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:40:39,851 INFO L85 PathProgramCache]: Analyzing trace with hash 341292008, now seen corresponding path program 1 times [2021-11-06 14:40:39,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:40:39,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334307269] [2021-11-06 14:40:39,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:40:39,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:40:39,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:39,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:40:39,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:40:39,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334307269] [2021-11-06 14:40:39,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334307269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:40:39,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:40:39,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:40:39,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713126845] [2021-11-06 14:40:39,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:40:39,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:40:39,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:40:39,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:40:39,936 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) [2021-11-06 14:40:40,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:40:40,317 INFO L93 Difference]: Finished difference Result 20135 states and 29611 transitions. [2021-11-06 14:40:40,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:40:40,318 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 [2021-11-06 14:40:40,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:40:40,340 INFO L225 Difference]: With dead ends: 20135 [2021-11-06 14:40:40,341 INFO L226 Difference]: Without dead ends: 11819 [2021-11-06 14:40:40,352 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:40:40,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11819 states. [2021-11-06 14:40:40,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11819 to 8201. [2021-11-06 14:40:40,579 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) [2021-11-06 14:40:40,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8201 states to 8201 states and 11956 transitions. [2021-11-06 14:40:40,595 INFO L78 Accepts]: Start accepts. Automaton has 8201 states and 11956 transitions. Word has length 86 [2021-11-06 14:40:40,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:40:40,596 INFO L470 AbstractCegarLoop]: Abstraction has 8201 states and 11956 transitions. [2021-11-06 14:40:40,596 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) [2021-11-06 14:40:40,596 INFO L276 IsEmpty]: Start isEmpty. Operand 8201 states and 11956 transitions. [2021-11-06 14:40:40,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-06 14:40:40,604 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:40:40,604 INFO L513 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] [2021-11-06 14:40:40,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 14:40:40,605 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:40:40,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:40:40,605 INFO L85 PathProgramCache]: Analyzing trace with hash -265952138, now seen corresponding path program 1 times [2021-11-06 14:40:40,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:40:40,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372309769] [2021-11-06 14:40:40,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:40:40,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:40:40,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:40:40,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:40:40,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372309769] [2021-11-06 14:40:40,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372309769] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:40:40,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:40:40,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:40:40,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203124761] [2021-11-06 14:40:40,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:40:40,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:40:40,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:40:40,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:40:40,664 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) [2021-11-06 14:40:40,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:40:40,940 INFO L93 Difference]: Finished difference Result 19005 states and 27638 transitions. [2021-11-06 14:40:40,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:40:40,941 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 [2021-11-06 14:40:40,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:40:40,962 INFO L225 Difference]: With dead ends: 19005 [2021-11-06 14:40:40,963 INFO L226 Difference]: Without dead ends: 10857 [2021-11-06 14:40:40,976 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:40:40,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10857 states. [2021-11-06 14:40:41,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10857 to 8217. [2021-11-06 14:40:41,197 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) [2021-11-06 14:40:41,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8217 states to 8217 states and 11972 transitions. [2021-11-06 14:40:41,212 INFO L78 Accepts]: Start accepts. Automaton has 8217 states and 11972 transitions. Word has length 119 [2021-11-06 14:40:41,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:40:41,213 INFO L470 AbstractCegarLoop]: Abstraction has 8217 states and 11972 transitions. [2021-11-06 14:40:41,213 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) [2021-11-06 14:40:41,213 INFO L276 IsEmpty]: Start isEmpty. Operand 8217 states and 11972 transitions. [2021-11-06 14:40:41,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-06 14:40:41,221 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:40:41,221 INFO L513 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] [2021-11-06 14:40:41,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-06 14:40:41,221 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:40:41,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:40:41,222 INFO L85 PathProgramCache]: Analyzing trace with hash 464660825, now seen corresponding path program 1 times [2021-11-06 14:40:41,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:40:41,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910826239] [2021-11-06 14:40:41,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:40:41,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:40:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:41,301 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:40:41,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:40:41,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910826239] [2021-11-06 14:40:41,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910826239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:40:41,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:40:41,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:40:41,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335339079] [2021-11-06 14:40:41,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:40:41,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:40:41,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:40:41,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:40:41,303 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) [2021-11-06 14:40:41,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:40:41,958 INFO L93 Difference]: Finished difference Result 40548 states and 59167 transitions. [2021-11-06 14:40:41,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:40:41,958 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 [2021-11-06 14:40:41,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:40:42,019 INFO L225 Difference]: With dead ends: 40548 [2021-11-06 14:40:42,020 INFO L226 Difference]: Without dead ends: 32384 [2021-11-06 14:40:42,041 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:40:42,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32384 states. [2021-11-06 14:40:42,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32384 to 8233. [2021-11-06 14:40:42,435 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) [2021-11-06 14:40:42,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8233 states to 8233 states and 11988 transitions. [2021-11-06 14:40:42,447 INFO L78 Accepts]: Start accepts. Automaton has 8233 states and 11988 transitions. Word has length 126 [2021-11-06 14:40:42,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:40:42,447 INFO L470 AbstractCegarLoop]: Abstraction has 8233 states and 11988 transitions. [2021-11-06 14:40:42,447 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) [2021-11-06 14:40:42,447 INFO L276 IsEmpty]: Start isEmpty. Operand 8233 states and 11988 transitions. [2021-11-06 14:40:42,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-06 14:40:42,454 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:40:42,454 INFO L513 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] [2021-11-06 14:40:42,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-06 14:40:42,455 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:40:42,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:40:42,455 INFO L85 PathProgramCache]: Analyzing trace with hash 772581936, now seen corresponding path program 1 times [2021-11-06 14:40:42,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:40:42,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127490740] [2021-11-06 14:40:42,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:40:42,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:40:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:42,541 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:40:42,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:40:42,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127490740] [2021-11-06 14:40:42,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127490740] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:40:42,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806531746] [2021-11-06 14:40:42,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:40:42,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:40:42,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:40:42,544 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:40:42,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-06 14:40:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:42,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-06 14:40:42,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:40:43,175 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:40:43,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806531746] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:40:43,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:40:43,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-06 14:40:43,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817283016] [2021-11-06 14:40:43,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:40:43,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:40:43,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:40:43,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:40:43,177 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) [2021-11-06 14:40:43,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:40:43,600 INFO L93 Difference]: Finished difference Result 21501 states and 31227 transitions. [2021-11-06 14:40:43,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 14:40:43,601 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 [2021-11-06 14:40:43,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:40:43,619 INFO L225 Difference]: With dead ends: 21501 [2021-11-06 14:40:43,620 INFO L226 Difference]: Without dead ends: 13321 [2021-11-06 14:40:43,630 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-06 14:40:43,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13321 states. [2021-11-06 14:40:43,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13321 to 8241. [2021-11-06 14:40:43,844 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) [2021-11-06 14:40:43,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8241 states to 8241 states and 11996 transitions. [2021-11-06 14:40:43,854 INFO L78 Accepts]: Start accepts. Automaton has 8241 states and 11996 transitions. Word has length 129 [2021-11-06 14:40:43,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:40:43,855 INFO L470 AbstractCegarLoop]: Abstraction has 8241 states and 11996 transitions. [2021-11-06 14:40:43,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:40:43,855 INFO L276 IsEmpty]: Start isEmpty. Operand 8241 states and 11996 transitions. [2021-11-06 14:40:43,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-06 14:40:43,861 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:40:43,862 INFO L513 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] [2021-11-06 14:40:43,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-06 14:40:44,080 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 [2021-11-06 14:40:44,081 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:40:44,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:40:44,081 INFO L85 PathProgramCache]: Analyzing trace with hash 2006158458, now seen corresponding path program 1 times [2021-11-06 14:40:44,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:40:44,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634385886] [2021-11-06 14:40:44,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:40:44,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:40:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:44,340 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:40:44,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:40:44,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634385886] [2021-11-06 14:40:44,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634385886] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:40:44,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587173414] [2021-11-06 14:40:44,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:40:44,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:40:44,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:40:44,342 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:40:44,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-06 14:40:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:44,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 1506 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 14:40:44,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:40:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:40:45,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587173414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:40:45,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:40:45,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-06 14:40:45,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184895601] [2021-11-06 14:40:45,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:40:45,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:40:45,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:40:45,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:40:45,175 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) [2021-11-06 14:40:45,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:40:45,564 INFO L93 Difference]: Finished difference Result 10931 states and 15825 transitions. [2021-11-06 14:40:45,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:40:45,564 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 [2021-11-06 14:40:45,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:40:45,582 INFO L225 Difference]: With dead ends: 10931 [2021-11-06 14:40:45,582 INFO L226 Difference]: Without dead ends: 10923 [2021-11-06 14:40:45,585 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:40:45,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10923 states. [2021-11-06 14:40:45,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10923 to 9639. [2021-11-06 14:40:45,909 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) [2021-11-06 14:40:45,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9639 states to 9639 states and 13997 transitions. [2021-11-06 14:40:45,924 INFO L78 Accepts]: Start accepts. Automaton has 9639 states and 13997 transitions. Word has length 144 [2021-11-06 14:40:45,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:40:45,925 INFO L470 AbstractCegarLoop]: Abstraction has 9639 states and 13997 transitions. [2021-11-06 14:40:45,925 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) [2021-11-06 14:40:45,925 INFO L276 IsEmpty]: Start isEmpty. Operand 9639 states and 13997 transitions. [2021-11-06 14:40:45,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-06 14:40:45,933 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:40:45,933 INFO L513 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] [2021-11-06 14:40:45,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-06 14:40:46,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-06 14:40:46,148 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:40:46,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:40:46,148 INFO L85 PathProgramCache]: Analyzing trace with hash -290010734, now seen corresponding path program 1 times [2021-11-06 14:40:46,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:40:46,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956070834] [2021-11-06 14:40:46,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:40:46,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:40:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:40:46,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:40:46,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956070834] [2021-11-06 14:40:46,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956070834] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:40:46,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:40:46,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:40:46,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617788216] [2021-11-06 14:40:46,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:40:46,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:40:46,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:40:46,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:40:46,335 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) [2021-11-06 14:40:46,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:40:46,511 INFO L93 Difference]: Finished difference Result 14409 states and 20943 transitions. [2021-11-06 14:40:46,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:40:46,511 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 [2021-11-06 14:40:46,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:40:46,519 INFO L225 Difference]: With dead ends: 14409 [2021-11-06 14:40:46,519 INFO L226 Difference]: Without dead ends: 4081 [2021-11-06 14:40:46,531 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:40:46,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4081 states. [2021-11-06 14:40:46,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4081 to 4081. [2021-11-06 14:40:46,712 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) [2021-11-06 14:40:46,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4081 states to 4081 states and 5885 transitions. [2021-11-06 14:40:46,716 INFO L78 Accepts]: Start accepts. Automaton has 4081 states and 5885 transitions. Word has length 148 [2021-11-06 14:40:46,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:40:46,716 INFO L470 AbstractCegarLoop]: Abstraction has 4081 states and 5885 transitions. [2021-11-06 14:40:46,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:40:46,717 INFO L276 IsEmpty]: Start isEmpty. Operand 4081 states and 5885 transitions. [2021-11-06 14:40:46,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-06 14:40:46,720 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:40:46,720 INFO L513 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] [2021-11-06 14:40:46,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-06 14:40:46,721 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:40:46,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:40:46,721 INFO L85 PathProgramCache]: Analyzing trace with hash 527780847, now seen corresponding path program 1 times [2021-11-06 14:40:46,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:40:46,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226479971] [2021-11-06 14:40:46,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:40:46,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:40:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:46,935 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-06 14:40:46,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:40:46,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226479971] [2021-11-06 14:40:46,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226479971] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:40:46,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:40:46,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 14:40:46,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431973941] [2021-11-06 14:40:46,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 14:40:46,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:40:46,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 14:40:46,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:40:46,937 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) [2021-11-06 14:40:49,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:40:49,456 INFO L93 Difference]: Finished difference Result 15553 states and 22553 transitions. [2021-11-06 14:40:49,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 14:40:49,456 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 [2021-11-06 14:40:49,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:40:49,477 INFO L225 Difference]: With dead ends: 15553 [2021-11-06 14:40:49,477 INFO L226 Difference]: Without dead ends: 11558 [2021-11-06 14:40:49,486 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-06 14:40:49,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11558 states. [2021-11-06 14:40:49,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11558 to 4111. [2021-11-06 14:40:49,672 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) [2021-11-06 14:40:49,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4111 states to 4111 states and 5915 transitions. [2021-11-06 14:40:49,678 INFO L78 Accepts]: Start accepts. Automaton has 4111 states and 5915 transitions. Word has length 156 [2021-11-06 14:40:49,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:40:49,678 INFO L470 AbstractCegarLoop]: Abstraction has 4111 states and 5915 transitions. [2021-11-06 14:40:49,678 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) [2021-11-06 14:40:49,678 INFO L276 IsEmpty]: Start isEmpty. Operand 4111 states and 5915 transitions. [2021-11-06 14:40:49,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-06 14:40:49,683 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:40:49,683 INFO L513 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] [2021-11-06 14:40:49,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-06 14:40:49,683 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:40:49,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:40:49,684 INFO L85 PathProgramCache]: Analyzing trace with hash 972368043, now seen corresponding path program 1 times [2021-11-06 14:40:49,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:40:49,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415538585] [2021-11-06 14:40:49,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:40:49,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:40:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:49,836 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-06 14:40:49,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:40:49,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415538585] [2021-11-06 14:40:49,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415538585] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:40:49,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:40:49,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 14:40:49,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666318301] [2021-11-06 14:40:49,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 14:40:49,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:40:49,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 14:40:49,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:40:49,839 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) [2021-11-06 14:40:50,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:40:50,861 INFO L93 Difference]: Finished difference Result 25221 states and 36317 transitions. [2021-11-06 14:40:50,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-06 14:40:50,862 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 [2021-11-06 14:40:50,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:40:50,893 INFO L225 Difference]: With dead ends: 25221 [2021-11-06 14:40:50,893 INFO L226 Difference]: Without dead ends: 21196 [2021-11-06 14:40:50,905 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-11-06 14:40:50,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21196 states. [2021-11-06 14:40:51,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21196 to 8180. [2021-11-06 14:40:51,369 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) [2021-11-06 14:40:51,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8180 states to 8180 states and 11763 transitions. [2021-11-06 14:40:51,387 INFO L78 Accepts]: Start accepts. Automaton has 8180 states and 11763 transitions. Word has length 158 [2021-11-06 14:40:51,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:40:51,387 INFO L470 AbstractCegarLoop]: Abstraction has 8180 states and 11763 transitions. [2021-11-06 14:40:51,387 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) [2021-11-06 14:40:51,387 INFO L276 IsEmpty]: Start isEmpty. Operand 8180 states and 11763 transitions. [2021-11-06 14:40:51,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-06 14:40:51,401 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:40:51,401 INFO L513 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] [2021-11-06 14:40:51,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-06 14:40:51,403 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:40:51,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:40:51,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1848387049, now seen corresponding path program 1 times [2021-11-06 14:40:51,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:40:51,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246578017] [2021-11-06 14:40:51,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:40:51,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:40:51,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-06 14:40:51,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:40:51,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246578017] [2021-11-06 14:40:51,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246578017] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:40:51,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:40:51,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:40:51,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081336699] [2021-11-06 14:40:51,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:40:51,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:40:51,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:40:51,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:40:51,604 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) [2021-11-06 14:40:53,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:40:53,236 INFO L93 Difference]: Finished difference Result 36292 states and 52227 transitions. [2021-11-06 14:40:53,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 14:40:53,237 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 [2021-11-06 14:40:53,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:40:53,277 INFO L225 Difference]: With dead ends: 36292 [2021-11-06 14:40:53,277 INFO L226 Difference]: Without dead ends: 28258 [2021-11-06 14:40:53,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:40:53,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28258 states. [2021-11-06 14:40:53,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28258 to 8212. [2021-11-06 14:40:53,822 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) [2021-11-06 14:40:53,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8212 states to 8212 states and 11795 transitions. [2021-11-06 14:40:53,831 INFO L78 Accepts]: Start accepts. Automaton has 8212 states and 11795 transitions. Word has length 158 [2021-11-06 14:40:53,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:40:53,831 INFO L470 AbstractCegarLoop]: Abstraction has 8212 states and 11795 transitions. [2021-11-06 14:40:53,832 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) [2021-11-06 14:40:53,832 INFO L276 IsEmpty]: Start isEmpty. Operand 8212 states and 11795 transitions. [2021-11-06 14:40:53,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-06 14:40:53,838 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:40:53,839 INFO L513 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] [2021-11-06 14:40:53,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-06 14:40:53,839 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:40:53,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:40:53,839 INFO L85 PathProgramCache]: Analyzing trace with hash -622349658, now seen corresponding path program 1 times [2021-11-06 14:40:53,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:40:53,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292014948] [2021-11-06 14:40:53,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:40:53,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:40:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:40:55,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:40:55,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292014948] [2021-11-06 14:40:55,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292014948] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:40:55,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478635131] [2021-11-06 14:40:55,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:40:55,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:40:55,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:40:55,094 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:40:55,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-06 14:40:55,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:40:55,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-06 14:40:55,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:40:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:40:56,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478635131] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:40:56,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:40:56,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15] total 37 [2021-11-06 14:40:56,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245720529] [2021-11-06 14:40:56,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-06 14:40:56,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:40:56,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-06 14:40:56,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1242, Unknown=0, NotChecked=0, Total=1332 [2021-11-06 14:40:56,733 INFO L87 Difference]: Start difference. First operand 8212 states and 11795 transitions. Second operand has 37 states, 37 states have (on average 8.108108108108109) internal successors, (300), 37 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:44:54,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:44:54,562 INFO L93 Difference]: Finished difference Result 507630 states and 740803 transitions. [2021-11-06 14:44:54,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 374 states. [2021-11-06 14:44:54,563 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 8.108108108108109) internal successors, (300), 37 states have internal predecessors, (300), 0 states have call successors, (0), 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 [2021-11-06 14:44:54,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:44:56,341 INFO L225 Difference]: With dead ends: 507630 [2021-11-06 14:44:56,341 INFO L226 Difference]: Without dead ends: 499564 [2021-11-06 14:44:56,640 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 397 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66685 ImplicationChecksByTransitivity, 35.8s TimeCoverageRelationStatistics Valid=12747, Invalid=146055, Unknown=0, NotChecked=0, Total=158802 [2021-11-06 14:44:57,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499564 states. [2021-11-06 14:45:03,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499564 to 12870. [2021-11-06 14:45:03,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12870 states, 12869 states have (on average 1.4483642862693293) internal successors, (18639), 12869 states have internal predecessors, (18639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:03,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12870 states to 12870 states and 18639 transitions. [2021-11-06 14:45:03,110 INFO L78 Accepts]: Start accepts. Automaton has 12870 states and 18639 transitions. Word has length 158 [2021-11-06 14:45:03,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:03,110 INFO L470 AbstractCegarLoop]: Abstraction has 12870 states and 18639 transitions. [2021-11-06 14:45:03,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 8.108108108108109) internal successors, (300), 37 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:03,111 INFO L276 IsEmpty]: Start isEmpty. Operand 12870 states and 18639 transitions. [2021-11-06 14:45:03,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-06 14:45:03,148 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:03,148 INFO L513 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, 1] [2021-11-06 14:45:03,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-06 14:45:03,363 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 [2021-11-06 14:45:03,364 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:03,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:03,364 INFO L85 PathProgramCache]: Analyzing trace with hash 749254846, now seen corresponding path program 1 times [2021-11-06 14:45:03,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:03,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969968232] [2021-11-06 14:45:03,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:03,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:03,867 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-06 14:45:03,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:03,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969968232] [2021-11-06 14:45:03,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969968232] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:03,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:45:03,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-06 14:45:03,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14873399] [2021-11-06 14:45:03,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-06 14:45:03,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:03,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-06 14:45:03,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-11-06 14:45:03,868 INFO L87 Difference]: Start difference. First operand 12870 states and 18639 transitions. Second operand has 16 states, 16 states have (on average 9.875) internal successors, (158), 15 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:17,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:17,142 INFO L93 Difference]: Finished difference Result 36558 states and 53109 transitions. [2021-11-06 14:45:17,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-06 14:45:17,142 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.875) internal successors, (158), 15 states have internal predecessors, (158), 0 states have call successors, (0), 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 168 [2021-11-06 14:45:17,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:17,178 INFO L225 Difference]: With dead ends: 36558 [2021-11-06 14:45:17,178 INFO L226 Difference]: Without dead ends: 25084 [2021-11-06 14:45:17,191 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=303, Invalid=1103, Unknown=0, NotChecked=0, Total=1406 [2021-11-06 14:45:17,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25084 states. [2021-11-06 14:45:19,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25084 to 12934. [2021-11-06 14:45:19,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12934 states, 12933 states have (on average 1.4467640918580376) internal successors, (18711), 12933 states have internal predecessors, (18711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:19,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12934 states to 12934 states and 18711 transitions. [2021-11-06 14:45:19,999 INFO L78 Accepts]: Start accepts. Automaton has 12934 states and 18711 transitions. Word has length 168 [2021-11-06 14:45:20,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:20,004 INFO L470 AbstractCegarLoop]: Abstraction has 12934 states and 18711 transitions. [2021-11-06 14:45:20,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.875) internal successors, (158), 15 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:20,004 INFO L276 IsEmpty]: Start isEmpty. Operand 12934 states and 18711 transitions. [2021-11-06 14:45:20,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-06 14:45:20,038 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:20,039 INFO L513 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, 1] [2021-11-06 14:45:20,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-06 14:45:20,039 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:20,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:20,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1096112320, now seen corresponding path program 1 times [2021-11-06 14:45:20,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:20,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786689759] [2021-11-06 14:45:20,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:20,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:20,351 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-06 14:45:20,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:20,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786689759] [2021-11-06 14:45:20,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786689759] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:20,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:45:20,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:45:20,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264071376] [2021-11-06 14:45:20,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:45:20,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:20,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:45:20,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:45:20,353 INFO L87 Difference]: Start difference. First operand 12934 states and 18711 transitions. Second operand has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:27,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:27,011 INFO L93 Difference]: Finished difference Result 37622 states and 54385 transitions. [2021-11-06 14:45:27,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 14:45:27,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-11-06 14:45:27,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:27,058 INFO L225 Difference]: With dead ends: 37622 [2021-11-06 14:45:27,058 INFO L226 Difference]: Without dead ends: 29492 [2021-11-06 14:45:27,072 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-06 14:45:27,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29492 states. [2021-11-06 14:45:29,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29492 to 12922. [2021-11-06 14:45:29,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12922 states, 12921 states have (on average 1.447179010912468) internal successors, (18699), 12921 states have internal predecessors, (18699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:29,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12922 states to 12922 states and 18699 transitions. [2021-11-06 14:45:29,992 INFO L78 Accepts]: Start accepts. Automaton has 12922 states and 18699 transitions. Word has length 168 [2021-11-06 14:45:29,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:29,992 INFO L470 AbstractCegarLoop]: Abstraction has 12922 states and 18699 transitions. [2021-11-06 14:45:29,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:29,993 INFO L276 IsEmpty]: Start isEmpty. Operand 12922 states and 18699 transitions. [2021-11-06 14:45:30,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-06 14:45:30,005 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:30,005 INFO L513 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, 1, 1] [2021-11-06 14:45:30,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-06 14:45:30,006 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:30,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:30,006 INFO L85 PathProgramCache]: Analyzing trace with hash 2018119934, now seen corresponding path program 1 times [2021-11-06 14:45:30,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:30,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741399768] [2021-11-06 14:45:30,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:30,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:31,070 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:45:31,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:31,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741399768] [2021-11-06 14:45:31,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741399768] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:31,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:45:31,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-11-06 14:45:31,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252543273] [2021-11-06 14:45:31,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-06 14:45:31,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:31,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-06 14:45:31,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-11-06 14:45:31,071 INFO L87 Difference]: Start difference. First operand 12922 states and 18699 transitions. Second operand has 30 states, 30 states have (on average 5.6) internal successors, (168), 29 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)