./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5f08f0f0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.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 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5f08f0f [2021-11-05 16:29:56,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-05 16:29:56,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-05 16:29:56,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-05 16:29:56,987 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-05 16:29:56,990 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-05 16:29:56,991 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-05 16:29:56,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-05 16:29:56,996 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-05 16:29:57,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-05 16:29:57,000 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-05 16:29:57,010 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-05 16:29:57,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-05 16:29:57,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-05 16:29:57,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-05 16:29:57,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-05 16:29:57,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-05 16:29:57,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-05 16:29:57,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-05 16:29:57,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-05 16:29:57,024 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-05 16:29:57,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-05 16:29:57,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-05 16:29:57,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-05 16:29:57,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-05 16:29:57,032 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-05 16:29:57,032 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-05 16:29:57,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-05 16:29:57,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-05 16:29:57,034 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-05 16:29:57,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-05 16:29:57,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-05 16:29:57,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-05 16:29:57,037 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-05 16:29:57,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-05 16:29:57,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-05 16:29:57,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-05 16:29:57,038 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-05 16:29:57,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-05 16:29:57,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-05 16:29:57,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-05 16:29:57,041 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-05 16:29:57,070 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-05 16:29:57,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-05 16:29:57,072 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-05 16:29:57,072 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-05 16:29:57,073 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-05 16:29:57,073 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-05 16:29:57,074 INFO L138 SettingsManager]: * Use SBE=true [2021-11-05 16:29:57,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-05 16:29:57,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-05 16:29:57,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-05 16:29:57,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-05 16:29:57,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-05 16:29:57,075 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-05 16:29:57,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-05 16:29:57,075 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-05 16:29:57,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-05 16:29:57,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-05 16:29:57,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-05 16:29:57,076 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-05 16:29:57,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 16:29:57,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-05 16:29:57,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-05 16:29:57,077 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-05 16:29:57,077 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-05 16:29:57,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-05 16:29:57,077 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-05 16:29:57,077 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-05 16:29:57,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-05 16:29:57,078 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-05 16:29:57,078 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c [2021-11-05 16:29:57,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-05 16:29:57,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-05 16:29:57,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-05 16:29:57,389 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-05 16:29:57,389 INFO L275 PluginConnector]: CDTParser initialized [2021-11-05 16:29:57,390 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2021-11-05 16:29:57,437 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ff2737b0/d6161810db8a430c8653a989d126ff91/FLAG88e5a4bef [2021-11-05 16:29:58,040 INFO L306 CDTParser]: Found 1 translation units. [2021-11-05 16:29:58,041 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2021-11-05 16:29:58,071 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ff2737b0/d6161810db8a430c8653a989d126ff91/FLAG88e5a4bef [2021-11-05 16:29:58,413 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ff2737b0/d6161810db8a430c8653a989d126ff91 [2021-11-05 16:29:58,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-05 16:29:58,416 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-05 16:29:58,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-05 16:29:58,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-05 16:29:58,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-05 16:29:58,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 04:29:58" (1/1) ... [2021-11-05 16:29:58,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b041419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:29:58, skipping insertion in model container [2021-11-05 16:29:58,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 04:29:58" (1/1) ... [2021-11-05 16:29:58,430 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-05 16:29:58,508 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-05 16:29:59,108 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i[158694,158707] [2021-11-05 16:29:59,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 16:29:59,530 INFO L203 MainTranslator]: Completed pre-run [2021-11-05 16:29:59,635 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i[158694,158707] [2021-11-05 16:29:59,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 16:29:59,804 INFO L208 MainTranslator]: Completed translation [2021-11-05 16:29:59,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:29:59 WrapperNode [2021-11-05 16:29:59,805 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-05 16:29:59,807 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-05 16:29:59,807 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-05 16:29:59,807 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-05 16:29:59,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:29:59" (1/1) ... [2021-11-05 16:29:59,865 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:29:59" (1/1) ... [2021-11-05 16:30:00,000 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-05 16:30:00,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-05 16:30:00,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-05 16:30:00,008 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-05 16:30:00,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:29:59" (1/1) ... [2021-11-05 16:30:00,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:29:59" (1/1) ... [2021-11-05 16:30:00,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:29:59" (1/1) ... [2021-11-05 16:30:00,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:29:59" (1/1) ... [2021-11-05 16:30:00,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:29:59" (1/1) ... [2021-11-05 16:30:00,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:29:59" (1/1) ... [2021-11-05 16:30:00,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:29:59" (1/1) ... [2021-11-05 16:30:00,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-05 16:30:00,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-05 16:30:00,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-05 16:30:00,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-05 16:30:00,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:29:59" (1/1) ... [2021-11-05 16:30:00,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 16:30:00,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:30:00,346 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-05 16:30:00,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-05 16:30:00,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-05 16:30:00,378 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-05 16:30:00,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-05 16:30:00,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-05 16:30:00,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-05 16:30:00,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-05 16:30:00,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-05 16:30:00,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-05 16:30:00,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-05 16:30:00,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-05 16:30:00,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-05 16:30:00,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-05 16:30:00,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-05 16:30:00,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-05 16:30:00,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-05 16:30:00,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-05 16:30:02,901 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-05 16:30:02,902 INFO L299 CfgBuilder]: Removed 1048 assume(true) statements. [2021-11-05 16:30:02,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 04:30:02 BoogieIcfgContainer [2021-11-05 16:30:02,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-05 16:30:02,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-05 16:30:02,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-05 16:30:02,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-05 16:30:02,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.11 04:29:58" (1/3) ... [2021-11-05 16:30:02,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54cdc315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 04:30:02, skipping insertion in model container [2021-11-05 16:30:02,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:29:59" (2/3) ... [2021-11-05 16:30:02,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54cdc315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 04:30:02, skipping insertion in model container [2021-11-05 16:30:02,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 04:30:02" (3/3) ... [2021-11-05 16:30:02,913 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2021-11-05 16:30:02,917 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-05 16:30:02,917 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-05 16:30:02,966 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-05 16:30:02,975 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-05 16:30:02,975 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-05 16:30:03,014 INFO L276 IsEmpty]: Start isEmpty. Operand has 1019 states, 1017 states have (on average 1.5024582104228121) internal successors, (1528), 1018 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:03,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-05 16:30:03,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:30:03,031 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:30:03,031 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:30:03,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:30:03,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1191082698, now seen corresponding path program 1 times [2021-11-05 16:30:03,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:30:03,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871026683] [2021-11-05 16:30:03,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:03,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:30:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:30:03,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:30:03,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:30:03,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871026683] [2021-11-05 16:30:03,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871026683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:30:03,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:30:03,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:30:03,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476105450] [2021-11-05 16:30:03,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:30:03,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:30:03,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:30:03,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:30:03,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:30:03,471 INFO L87 Difference]: Start difference. First operand has 1019 states, 1017 states have (on average 1.5024582104228121) internal successors, (1528), 1018 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:03,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:30:03,765 INFO L93 Difference]: Finished difference Result 2969 states and 4469 transitions. [2021-11-05 16:30:03,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:30:03,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-11-05 16:30:03,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:30:03,789 INFO L225 Difference]: With dead ends: 2969 [2021-11-05 16:30:03,790 INFO L226 Difference]: Without dead ends: 1941 [2021-11-05 16:30:03,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.27ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:30:03,799 INFO L933 BasicCegarLoop]: 1405 mSDtfsCounter, 1319 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1319 SdHoareTripleChecker+Valid, 2784 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.02ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 85.88ms IncrementalHoareTripleChecker+Time [2021-11-05 16:30:03,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1319 Valid, 2784 Invalid, 15 Unknown, 0 Unchecked, 33.02ms Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 85.88ms Time] [2021-11-05 16:30:03,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2021-11-05 16:30:03,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1941. [2021-11-05 16:30:03,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 1.3871134020618556) internal successors, (2691), 1940 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:03,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 2691 transitions. [2021-11-05 16:30:03,919 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 2691 transitions. Word has length 27 [2021-11-05 16:30:03,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:30:03,920 INFO L470 AbstractCegarLoop]: Abstraction has 1941 states and 2691 transitions. [2021-11-05 16:30:03,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:03,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 2691 transitions. [2021-11-05 16:30:03,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-05 16:30:03,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:30:03,926 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:30:03,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-05 16:30:03,927 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:30:03,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:30:03,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1908761624, now seen corresponding path program 1 times [2021-11-05 16:30:03,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:30:03,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247462638] [2021-11-05 16:30:03,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:03,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:30:03,997 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 16:30:03,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143611177] [2021-11-05 16:30:03,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:03,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:30:03,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:30:03,999 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:30:04,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-05 16:30:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:30:04,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-05 16:30:04,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:30:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:30:04,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 16:30:04,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:30:04,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247462638] [2021-11-05 16:30:04,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 16:30:04,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143611177] [2021-11-05 16:30:04,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143611177] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:30:04,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:30:04,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-05 16:30:04,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283393141] [2021-11-05 16:30:04,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:30:04,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:30:04,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:30:04,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:30:04,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:30:04,433 INFO L87 Difference]: Start difference. First operand 1941 states and 2691 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:04,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:30:04,481 INFO L93 Difference]: Finished difference Result 3854 states and 5349 transitions. [2021-11-05 16:30:04,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:30:04,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-11-05 16:30:04,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:30:04,488 INFO L225 Difference]: With dead ends: 3854 [2021-11-05 16:30:04,488 INFO L226 Difference]: Without dead ends: 1941 [2021-11-05 16:30:04,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.82ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:30:04,492 INFO L933 BasicCegarLoop]: 1385 mSDtfsCounter, 1373 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.56ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.16ms IncrementalHoareTripleChecker+Time [2021-11-05 16:30:04,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1373 Valid, 1385 Invalid, 8 Unknown, 0 Unchecked, 2.56ms Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 7.16ms Time] [2021-11-05 16:30:04,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2021-11-05 16:30:04,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1941. [2021-11-05 16:30:04,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 1.3865979381443299) internal successors, (2690), 1940 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:04,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 2690 transitions. [2021-11-05 16:30:04,532 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 2690 transitions. Word has length 33 [2021-11-05 16:30:04,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:30:04,533 INFO L470 AbstractCegarLoop]: Abstraction has 1941 states and 2690 transitions. [2021-11-05 16:30:04,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:04,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 2690 transitions. [2021-11-05 16:30:04,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-05 16:30:04,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:30:04,535 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:30:04,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-05 16:30:04,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:30:04,747 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:30:04,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:30:04,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1321955610, now seen corresponding path program 1 times [2021-11-05 16:30:04,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:30:04,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190128044] [2021-11-05 16:30:04,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:04,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:30:04,792 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 16:30:04,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995575678] [2021-11-05 16:30:04,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:04,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:30:04,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:30:04,794 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:30:04,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-05 16:30:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:30:05,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-05 16:30:05,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:30:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:30:05,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 16:30:05,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:30:05,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190128044] [2021-11-05 16:30:05,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 16:30:05,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995575678] [2021-11-05 16:30:05,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995575678] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:30:05,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:30:05,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-05 16:30:05,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087763980] [2021-11-05 16:30:05,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:30:05,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-05 16:30:05,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:30:05,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-05 16:30:05,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:30:05,193 INFO L87 Difference]: Start difference. First operand 1941 states and 2690 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:05,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:30:05,617 INFO L93 Difference]: Finished difference Result 5765 states and 8003 transitions. [2021-11-05 16:30:05,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 16:30:05,618 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-11-05 16:30:05,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:30:05,631 INFO L225 Difference]: With dead ends: 5765 [2021-11-05 16:30:05,631 INFO L226 Difference]: Without dead ends: 3833 [2021-11-05 16:30:05,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.52ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-05 16:30:05,636 INFO L933 BasicCegarLoop]: 1280 mSDtfsCounter, 1338 mSDsluCounter, 3791 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 240.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1338 SdHoareTripleChecker+Valid, 5071 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.85ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 303.76ms IncrementalHoareTripleChecker+Time [2021-11-05 16:30:05,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1338 Valid, 5071 Invalid, 501 Unknown, 0 Unchecked, 8.85ms Time], IncrementalHoareTripleChecker [9 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 303.76ms Time] [2021-11-05 16:30:05,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3833 states. [2021-11-05 16:30:05,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3833 to 3681. [2021-11-05 16:30:05,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3681 states, 3680 states have (on average 1.389945652173913) internal successors, (5115), 3680 states have internal predecessors, (5115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:05,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3681 states to 3681 states and 5115 transitions. [2021-11-05 16:30:05,718 INFO L78 Accepts]: Start accepts. Automaton has 3681 states and 5115 transitions. Word has length 33 [2021-11-05 16:30:05,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:30:05,718 INFO L470 AbstractCegarLoop]: Abstraction has 3681 states and 5115 transitions. [2021-11-05 16:30:05,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:05,719 INFO L276 IsEmpty]: Start isEmpty. Operand 3681 states and 5115 transitions. [2021-11-05 16:30:05,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-05 16:30:05,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:30:05,724 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:30:05,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-05 16:30:05,943 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,SelfDestructingSolverStorable2 [2021-11-05 16:30:05,944 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:30:05,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:30:05,944 INFO L85 PathProgramCache]: Analyzing trace with hash -148593795, now seen corresponding path program 1 times [2021-11-05 16:30:05,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:30:05,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122611075] [2021-11-05 16:30:05,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:05,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:30:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:30:06,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:30:06,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:30:06,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122611075] [2021-11-05 16:30:06,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122611075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:30:06,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:30:06,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:30:06,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57620379] [2021-11-05 16:30:06,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:30:06,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:30:06,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:30:06,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:30:06,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:30:06,056 INFO L87 Difference]: Start difference. First operand 3681 states and 5115 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:06,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:30:06,224 INFO L93 Difference]: Finished difference Result 9529 states and 13314 transitions. [2021-11-05 16:30:06,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:30:06,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-11-05 16:30:06,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:30:06,245 INFO L225 Difference]: With dead ends: 9529 [2021-11-05 16:30:06,245 INFO L226 Difference]: Without dead ends: 5876 [2021-11-05 16:30:06,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.34ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:30:06,253 INFO L933 BasicCegarLoop]: 1414 mSDtfsCounter, 849 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 2735 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.85ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.29ms IncrementalHoareTripleChecker+Time [2021-11-05 16:30:06,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [849 Valid, 2735 Invalid, 41 Unknown, 0 Unchecked, 3.85ms Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 41.29ms Time] [2021-11-05 16:30:06,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5876 states. [2021-11-05 16:30:06,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5876 to 5855. [2021-11-05 16:30:06,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5855 states, 5854 states have (on average 1.4016057396651862) internal successors, (8205), 5854 states have internal predecessors, (8205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:06,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5855 states to 5855 states and 8205 transitions. [2021-11-05 16:30:06,406 INFO L78 Accepts]: Start accepts. Automaton has 5855 states and 8205 transitions. Word has length 53 [2021-11-05 16:30:06,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:30:06,407 INFO L470 AbstractCegarLoop]: Abstraction has 5855 states and 8205 transitions. [2021-11-05 16:30:06,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:06,407 INFO L276 IsEmpty]: Start isEmpty. Operand 5855 states and 8205 transitions. [2021-11-05 16:30:06,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-05 16:30:06,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:30:06,412 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:30:06,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-05 16:30:06,412 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:30:06,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:30:06,412 INFO L85 PathProgramCache]: Analyzing trace with hash 836191375, now seen corresponding path program 1 times [2021-11-05 16:30:06,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:30:06,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330318817] [2021-11-05 16:30:06,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:06,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:30:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:30:06,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:30:06,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:30:06,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330318817] [2021-11-05 16:30:06,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330318817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:30:06,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:30:06,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:30:06,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622946574] [2021-11-05 16:30:06,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:30:06,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:30:06,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:30:06,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:30:06,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:30:06,496 INFO L87 Difference]: Start difference. First operand 5855 states and 8205 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:06,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:30:06,769 INFO L93 Difference]: Finished difference Result 15443 states and 21659 transitions. [2021-11-05 16:30:06,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:30:06,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-11-05 16:30:06,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:30:06,802 INFO L225 Difference]: With dead ends: 15443 [2021-11-05 16:30:06,802 INFO L226 Difference]: Without dead ends: 9616 [2021-11-05 16:30:06,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.34ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:30:06,814 INFO L933 BasicCegarLoop]: 1392 mSDtfsCounter, 1011 mSDsluCounter, 1323 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 2715 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.13ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.60ms IncrementalHoareTripleChecker+Time [2021-11-05 16:30:06,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1011 Valid, 2715 Invalid, 39 Unknown, 0 Unchecked, 4.13ms Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 41.60ms Time] [2021-11-05 16:30:06,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9616 states. [2021-11-05 16:30:07,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9616 to 9581. [2021-11-05 16:30:07,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9581 states, 9580 states have (on average 1.4031315240083508) internal successors, (13442), 9580 states have internal predecessors, (13442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:07,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9581 states to 9581 states and 13442 transitions. [2021-11-05 16:30:07,057 INFO L78 Accepts]: Start accepts. Automaton has 9581 states and 13442 transitions. Word has length 57 [2021-11-05 16:30:07,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:30:07,058 INFO L470 AbstractCegarLoop]: Abstraction has 9581 states and 13442 transitions. [2021-11-05 16:30:07,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:07,058 INFO L276 IsEmpty]: Start isEmpty. Operand 9581 states and 13442 transitions. [2021-11-05 16:30:07,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-05 16:30:07,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:30:07,064 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:30:07,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-05 16:30:07,064 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:30:07,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:30:07,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1796362686, now seen corresponding path program 1 times [2021-11-05 16:30:07,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:30:07,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860397624] [2021-11-05 16:30:07,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:07,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:30:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:30:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 16:30:07,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:30:07,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860397624] [2021-11-05 16:30:07,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860397624] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:30:07,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:30:07,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:30:07,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539359952] [2021-11-05 16:30:07,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:30:07,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:30:07,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:30:07,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:30:07,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:30:07,136 INFO L87 Difference]: Start difference. First operand 9581 states and 13442 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:07,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:30:07,445 INFO L93 Difference]: Finished difference Result 24423 states and 34142 transitions. [2021-11-05 16:30:07,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:30:07,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 68 [2021-11-05 16:30:07,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:30:07,485 INFO L225 Difference]: With dead ends: 24423 [2021-11-05 16:30:07,485 INFO L226 Difference]: Without dead ends: 14870 [2021-11-05 16:30:07,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.24ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:30:07,500 INFO L933 BasicCegarLoop]: 2297 mSDtfsCounter, 988 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 3630 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.58ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.04ms IncrementalHoareTripleChecker+Time [2021-11-05 16:30:07,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [988 Valid, 3630 Invalid, 29 Unknown, 0 Unchecked, 4.58ms Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 30.04ms Time] [2021-11-05 16:30:07,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14870 states. [2021-11-05 16:30:07,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14870 to 14805. [2021-11-05 16:30:07,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14805 states, 14804 states have (on average 1.3943528776006484) internal successors, (20642), 14804 states have internal predecessors, (20642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:07,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14805 states to 14805 states and 20642 transitions. [2021-11-05 16:30:07,825 INFO L78 Accepts]: Start accepts. Automaton has 14805 states and 20642 transitions. Word has length 68 [2021-11-05 16:30:07,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:30:07,826 INFO L470 AbstractCegarLoop]: Abstraction has 14805 states and 20642 transitions. [2021-11-05 16:30:07,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:07,826 INFO L276 IsEmpty]: Start isEmpty. Operand 14805 states and 20642 transitions. [2021-11-05 16:30:07,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-05 16:30:07,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:30:07,832 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:30:07,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-05 16:30:07,833 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:30:07,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:30:07,833 INFO L85 PathProgramCache]: Analyzing trace with hash 139183937, now seen corresponding path program 1 times [2021-11-05 16:30:07,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:30:07,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67785966] [2021-11-05 16:30:07,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:07,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:30:07,913 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 16:30:07,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [159739486] [2021-11-05 16:30:07,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:07,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:30:07,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:30:07,916 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:30:07,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-05 16:30:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:30:08,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 1077 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-05 16:30:08,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:30:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:30:08,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 16:30:08,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:30:08,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67785966] [2021-11-05 16:30:08,345 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 16:30:08,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159739486] [2021-11-05 16:30:08,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159739486] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:30:08,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:30:08,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 16:30:08,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953072041] [2021-11-05 16:30:08,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:30:08,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:30:08,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:30:08,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:30:08,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:30:08,347 INFO L87 Difference]: Start difference. First operand 14805 states and 20642 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:08,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:30:08,662 INFO L93 Difference]: Finished difference Result 29635 states and 41327 transitions. [2021-11-05 16:30:08,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 16:30:08,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 70 [2021-11-05 16:30:08,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:30:08,697 INFO L225 Difference]: With dead ends: 29635 [2021-11-05 16:30:08,697 INFO L226 Difference]: Without dead ends: 14834 [2021-11-05 16:30:08,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.30ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:30:08,721 INFO L933 BasicCegarLoop]: 1394 mSDtfsCounter, 13 mSDsluCounter, 2776 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 4170 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.91ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.38ms IncrementalHoareTripleChecker+Time [2021-11-05 16:30:08,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 4170 Invalid, 13 Unknown, 0 Unchecked, 3.91ms Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 60.38ms Time] [2021-11-05 16:30:08,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14834 states. [2021-11-05 16:30:09,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14834 to 14808. [2021-11-05 16:30:09,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14808 states, 14807 states have (on average 1.393732693996083) internal successors, (20637), 14807 states have internal predecessors, (20637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:09,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14808 states to 14808 states and 20637 transitions. [2021-11-05 16:30:09,114 INFO L78 Accepts]: Start accepts. Automaton has 14808 states and 20637 transitions. Word has length 70 [2021-11-05 16:30:09,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:30:09,116 INFO L470 AbstractCegarLoop]: Abstraction has 14808 states and 20637 transitions. [2021-11-05 16:30:09,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:09,117 INFO L276 IsEmpty]: Start isEmpty. Operand 14808 states and 20637 transitions. [2021-11-05 16:30:09,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-05 16:30:09,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:30:09,124 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:30:09,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-05 16:30:09,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:30:09,353 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:30:09,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:30:09,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1015277715, now seen corresponding path program 1 times [2021-11-05 16:30:09,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:30:09,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714751510] [2021-11-05 16:30:09,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:09,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:30:09,376 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 16:30:09,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1774955822] [2021-11-05 16:30:09,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:09,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:30:09,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:30:09,384 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:30:09,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-05 16:30:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:30:09,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 1094 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-05 16:30:09,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:30:09,891 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-05 16:30:09,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 16:30:09,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:30:09,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714751510] [2021-11-05 16:30:09,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 16:30:09,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774955822] [2021-11-05 16:30:09,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774955822] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:30:09,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:30:09,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:30:09,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588374394] [2021-11-05 16:30:09,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:30:09,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:30:09,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:30:09,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:30:09,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:30:09,894 INFO L87 Difference]: Start difference. First operand 14808 states and 20637 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:10,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:30:10,166 INFO L93 Difference]: Finished difference Result 14829 states and 20660 transitions. [2021-11-05 16:30:10,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 16:30:10,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 71 [2021-11-05 16:30:10,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:30:10,203 INFO L225 Difference]: With dead ends: 14829 [2021-11-05 16:30:10,203 INFO L226 Difference]: Without dead ends: 14821 [2021-11-05 16:30:10,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.85ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:30:10,212 INFO L933 BasicCegarLoop]: 1383 mSDtfsCounter, 1351 mSDsluCounter, 1381 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1351 SdHoareTripleChecker+Valid, 2764 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.13ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.18ms IncrementalHoareTripleChecker+Time [2021-11-05 16:30:10,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1351 Valid, 2764 Invalid, 22 Unknown, 0 Unchecked, 4.13ms Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 72.18ms Time] [2021-11-05 16:30:10,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14821 states. [2021-11-05 16:30:10,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14821 to 14809. [2021-11-05 16:30:10,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14809 states, 14808 states have (on average 1.3937061048082118) internal successors, (20638), 14808 states have internal predecessors, (20638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:10,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14809 states to 14809 states and 20638 transitions. [2021-11-05 16:30:10,588 INFO L78 Accepts]: Start accepts. Automaton has 14809 states and 20638 transitions. Word has length 71 [2021-11-05 16:30:10,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:30:10,588 INFO L470 AbstractCegarLoop]: Abstraction has 14809 states and 20638 transitions. [2021-11-05 16:30:10,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:10,589 INFO L276 IsEmpty]: Start isEmpty. Operand 14809 states and 20638 transitions. [2021-11-05 16:30:10,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-05 16:30:10,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:30:10,596 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:30:10,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-05 16:30:10,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:30:10,816 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:30:10,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:30:10,817 INFO L85 PathProgramCache]: Analyzing trace with hash -2032495438, now seen corresponding path program 1 times [2021-11-05 16:30:10,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:30:10,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329053271] [2021-11-05 16:30:10,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:10,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:30:10,836 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 16:30:10,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098009728] [2021-11-05 16:30:10,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:10,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:30:10,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:30:10,838 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:30:10,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-05 16:30:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:30:11,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-05 16:30:11,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:30:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-05 16:30:11,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:30:11,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-05 16:30:11,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:30:11,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329053271] [2021-11-05 16:30:11,480 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 16:30:11,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098009728] [2021-11-05 16:30:11,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098009728] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 16:30:11,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-05 16:30:11,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-05 16:30:11,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925642521] [2021-11-05 16:30:11,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-05 16:30:11,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-05 16:30:11,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:30:11,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-05 16:30:11,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-05 16:30:11,482 INFO L87 Difference]: Start difference. First operand 14809 states and 20638 transitions. Second operand has 8 states, 8 states have (on average 16.375) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:11,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:30:11,744 INFO L93 Difference]: Finished difference Result 14856 states and 20693 transitions. [2021-11-05 16:30:11,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-05 16:30:11,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-05 16:30:11,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:30:11,780 INFO L225 Difference]: With dead ends: 14856 [2021-11-05 16:30:11,780 INFO L226 Difference]: Without dead ends: 14848 [2021-11-05 16:30:11,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 44.20ms TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-11-05 16:30:11,788 INFO L933 BasicCegarLoop]: 1383 mSDtfsCounter, 2828 mSDsluCounter, 1405 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2828 SdHoareTripleChecker+Valid, 2788 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.64ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 92.65ms IncrementalHoareTripleChecker+Time [2021-11-05 16:30:11,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2828 Valid, 2788 Invalid, 41 Unknown, 0 Unchecked, 5.64ms Time], IncrementalHoareTripleChecker [13 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 92.65ms Time] [2021-11-05 16:30:11,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14848 states. [2021-11-05 16:30:12,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14848 to 14848. [2021-11-05 16:30:12,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14848 states, 14847 states have (on average 1.3930760422981074) internal successors, (20683), 14847 states have internal predecessors, (20683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:12,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14848 states to 14848 states and 20683 transitions. [2021-11-05 16:30:12,144 INFO L78 Accepts]: Start accepts. Automaton has 14848 states and 20683 transitions. Word has length 75 [2021-11-05 16:30:12,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:30:12,145 INFO L470 AbstractCegarLoop]: Abstraction has 14848 states and 20683 transitions. [2021-11-05 16:30:12,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:12,145 INFO L276 IsEmpty]: Start isEmpty. Operand 14848 states and 20683 transitions. [2021-11-05 16:30:12,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-05 16:30:12,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:30:12,152 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:30:12,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-05 16:30:12,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:30:12,371 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:30:12,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:30:12,372 INFO L85 PathProgramCache]: Analyzing trace with hash -594566109, now seen corresponding path program 1 times [2021-11-05 16:30:12,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:30:12,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120952415] [2021-11-05 16:30:12,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:12,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:30:12,393 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 16:30:12,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961151549] [2021-11-05 16:30:12,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:12,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:30:12,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:30:12,403 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:30:12,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-05 16:30:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:30:12,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-05 16:30:12,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:30:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:30:12,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 16:30:12,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:30:12,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120952415] [2021-11-05 16:30:12,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 16:30:12,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961151549] [2021-11-05 16:30:12,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961151549] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:30:12,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:30:12,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:30:12,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284387065] [2021-11-05 16:30:12,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:30:12,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:30:12,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:30:12,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:30:12,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:30:12,837 INFO L87 Difference]: Start difference. First operand 14848 states and 20683 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:13,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:30:13,120 INFO L93 Difference]: Finished difference Result 22182 states and 30929 transitions. [2021-11-05 16:30:13,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:30:13,120 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 77 [2021-11-05 16:30:13,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:30:13,134 INFO L225 Difference]: With dead ends: 22182 [2021-11-05 16:30:13,134 INFO L226 Difference]: Without dead ends: 7345 [2021-11-05 16:30:13,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.44ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:30:13,153 INFO L933 BasicCegarLoop]: 1409 mSDtfsCounter, 1302 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 124.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1302 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.45ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 138.36ms IncrementalHoareTripleChecker+Time [2021-11-05 16:30:13,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1302 Valid, 1481 Invalid, 11 Unknown, 0 Unchecked, 2.45ms Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 138.36ms Time] [2021-11-05 16:30:13,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7345 states. [2021-11-05 16:30:13,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7345 to 7345. [2021-11-05 16:30:13,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7345 states, 7344 states have (on average 1.3917483660130718) internal successors, (10221), 7344 states have internal predecessors, (10221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:13,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7345 states to 7345 states and 10221 transitions. [2021-11-05 16:30:13,279 INFO L78 Accepts]: Start accepts. Automaton has 7345 states and 10221 transitions. Word has length 77 [2021-11-05 16:30:13,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:30:13,279 INFO L470 AbstractCegarLoop]: Abstraction has 7345 states and 10221 transitions. [2021-11-05 16:30:13,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:13,280 INFO L276 IsEmpty]: Start isEmpty. Operand 7345 states and 10221 transitions. [2021-11-05 16:30:13,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-05 16:30:13,287 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:30:13,288 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:30:13,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-05 16:30:13,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:30:13,506 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:30:13,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:30:13,506 INFO L85 PathProgramCache]: Analyzing trace with hash 376876047, now seen corresponding path program 2 times [2021-11-05 16:30:13,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:30:13,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825423437] [2021-11-05 16:30:13,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:13,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:30:13,543 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 16:30:13,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717138838] [2021-11-05 16:30:13,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-05 16:30:13,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:30:13,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:30:13,545 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:30:13,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-05 16:30:13,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-05 16:30:13,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-05 16:30:13,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-05 16:30:13,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:30:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-05 16:30:14,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:30:14,447 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-05 16:30:14,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:30:14,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825423437] [2021-11-05 16:30:14,447 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 16:30:14,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717138838] [2021-11-05 16:30:14,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717138838] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 16:30:14,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-05 16:30:14,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-05 16:30:14,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549423281] [2021-11-05 16:30:14,448 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-05 16:30:14,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-05 16:30:14,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:30:14,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-05 16:30:14,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2021-11-05 16:30:14,449 INFO L87 Difference]: Start difference. First operand 7345 states and 10221 transitions. Second operand has 14 states, 14 states have (on average 11.071428571428571) internal successors, (155), 13 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:14,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:30:14,852 INFO L93 Difference]: Finished difference Result 7431 states and 10324 transitions. [2021-11-05 16:30:14,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-05 16:30:14,852 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.071428571428571) internal successors, (155), 13 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-05 16:30:14,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:30:14,866 INFO L225 Difference]: With dead ends: 7431 [2021-11-05 16:30:14,866 INFO L226 Difference]: Without dead ends: 7423 [2021-11-05 16:30:14,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 109.87ms TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2021-11-05 16:30:14,870 INFO L933 BasicCegarLoop]: 1380 mSDtfsCounter, 1628 mSDsluCounter, 4206 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 213.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1628 SdHoareTripleChecker+Valid, 5586 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.94ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 263.30ms IncrementalHoareTripleChecker+Time [2021-11-05 16:30:14,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1628 Valid, 5586 Invalid, 79 Unknown, 0 Unchecked, 6.94ms Time], IncrementalHoareTripleChecker [17 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 263.30ms Time] [2021-11-05 16:30:14,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7423 states. [2021-11-05 16:30:14,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7423 to 7423. [2021-11-05 16:30:14,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7423 states, 7422 states have (on average 1.389248181083266) internal successors, (10311), 7422 states have internal predecessors, (10311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:15,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7423 states to 7423 states and 10311 transitions. [2021-11-05 16:30:15,001 INFO L78 Accepts]: Start accepts. Automaton has 7423 states and 10311 transitions. Word has length 87 [2021-11-05 16:30:15,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:30:15,001 INFO L470 AbstractCegarLoop]: Abstraction has 7423 states and 10311 transitions. [2021-11-05 16:30:15,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.071428571428571) internal successors, (155), 13 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:15,001 INFO L276 IsEmpty]: Start isEmpty. Operand 7423 states and 10311 transitions. [2021-11-05 16:30:15,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-05 16:30:15,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:30:15,014 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:30:15,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-05 16:30:15,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:30:15,228 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:30:15,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:30:15,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1599385673, now seen corresponding path program 3 times [2021-11-05 16:30:15,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:30:15,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823731309] [2021-11-05 16:30:15,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:15,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:30:15,246 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 16:30:15,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1164590902] [2021-11-05 16:30:15,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-05 16:30:15,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:30:15,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:30:15,248 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:30:15,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-05 16:30:15,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-05 16:30:15,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-05 16:30:15,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-05 16:30:15,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:30:15,790 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-11-05 16:30:15,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 16:30:15,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:30:15,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823731309] [2021-11-05 16:30:15,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 16:30:15,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164590902] [2021-11-05 16:30:15,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164590902] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:30:15,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:30:15,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 16:30:15,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585334796] [2021-11-05 16:30:15,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:30:15,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:30:15,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:30:15,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:30:15,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:30:15,793 INFO L87 Difference]: Start difference. First operand 7423 states and 10311 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:16,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:30:16,386 INFO L93 Difference]: Finished difference Result 33418 states and 46643 transitions. [2021-11-05 16:30:16,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 16:30:16,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 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 111 [2021-11-05 16:30:16,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:30:16,434 INFO L225 Difference]: With dead ends: 33418 [2021-11-05 16:30:16,435 INFO L226 Difference]: Without dead ends: 26072 [2021-11-05 16:30:16,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.70ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:30:16,452 INFO L933 BasicCegarLoop]: 2328 mSDtfsCounter, 3560 mSDsluCounter, 3620 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 98.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3560 SdHoareTripleChecker+Valid, 5948 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.57ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 121.27ms IncrementalHoareTripleChecker+Time [2021-11-05 16:30:16,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3560 Valid, 5948 Invalid, 170 Unknown, 0 Unchecked, 9.57ms Time], IncrementalHoareTripleChecker [38 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 121.27ms Time] [2021-11-05 16:30:16,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26072 states. [2021-11-05 16:30:16,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26072 to 7551. [2021-11-05 16:30:16,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7551 states, 7550 states have (on average 1.3826490066225166) internal successors, (10439), 7550 states have internal predecessors, (10439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:16,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7551 states to 7551 states and 10439 transitions. [2021-11-05 16:30:16,804 INFO L78 Accepts]: Start accepts. Automaton has 7551 states and 10439 transitions. Word has length 111 [2021-11-05 16:30:16,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:30:16,804 INFO L470 AbstractCegarLoop]: Abstraction has 7551 states and 10439 transitions. [2021-11-05 16:30:16,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:16,804 INFO L276 IsEmpty]: Start isEmpty. Operand 7551 states and 10439 transitions. [2021-11-05 16:30:16,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-05 16:30:16,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:30:16,819 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:30:16,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-05 16:30:17,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-05 16:30:17,039 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:30:17,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:30:17,039 INFO L85 PathProgramCache]: Analyzing trace with hash -187543249, now seen corresponding path program 1 times [2021-11-05 16:30:17,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:30:17,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875961994] [2021-11-05 16:30:17,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:17,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:30:17,058 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 16:30:17,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [59221636] [2021-11-05 16:30:17,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:17,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:30:17,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:30:17,084 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:30:17,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-05 16:30:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:30:17,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-05 16:30:17,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:30:17,535 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-05 16:30:17,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 16:30:17,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:30:17,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875961994] [2021-11-05 16:30:17,535 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 16:30:17,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59221636] [2021-11-05 16:30:17,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59221636] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:30:17,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:30:17,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:30:17,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125160461] [2021-11-05 16:30:17,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:30:17,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:30:17,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:30:17,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:30:17,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:30:17,537 INFO L87 Difference]: Start difference. First operand 7551 states and 10439 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:17,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:30:17,887 INFO L93 Difference]: Finished difference Result 17528 states and 24392 transitions. [2021-11-05 16:30:17,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:30:17,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 113 [2021-11-05 16:30:17,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:30:17,905 INFO L225 Difference]: With dead ends: 17528 [2021-11-05 16:30:17,905 INFO L226 Difference]: Without dead ends: 10054 [2021-11-05 16:30:17,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.44ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:30:17,917 INFO L933 BasicCegarLoop]: 1370 mSDtfsCounter, 1097 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1097 SdHoareTripleChecker+Valid, 2439 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.33ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.36ms IncrementalHoareTripleChecker+Time [2021-11-05 16:30:17,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1097 Valid, 2439 Invalid, 65 Unknown, 0 Unchecked, 3.33ms Time], IncrementalHoareTripleChecker [20 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 61.36ms Time] [2021-11-05 16:30:17,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10054 states. [2021-11-05 16:30:18,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10054 to 9915. [2021-11-05 16:30:18,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9915 states, 9914 states have (on average 1.3960056485777688) internal successors, (13840), 9914 states have internal predecessors, (13840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:18,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9915 states to 9915 states and 13840 transitions. [2021-11-05 16:30:18,175 INFO L78 Accepts]: Start accepts. Automaton has 9915 states and 13840 transitions. Word has length 113 [2021-11-05 16:30:18,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:30:18,175 INFO L470 AbstractCegarLoop]: Abstraction has 9915 states and 13840 transitions. [2021-11-05 16:30:18,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:18,176 INFO L276 IsEmpty]: Start isEmpty. Operand 9915 states and 13840 transitions. [2021-11-05 16:30:18,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-05 16:30:18,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:30:18,190 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:30:18,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-05 16:30:18,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-05 16:30:18,396 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:30:18,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:30:18,397 INFO L85 PathProgramCache]: Analyzing trace with hash 2055927863, now seen corresponding path program 1 times [2021-11-05 16:30:18,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:30:18,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119455919] [2021-11-05 16:30:18,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:18,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:30:18,416 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 16:30:18,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253079060] [2021-11-05 16:30:18,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:18,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:30:18,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:30:18,418 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:30:18,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-05 16:30:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:30:18,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-05 16:30:18,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:30:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2021-11-05 16:30:18,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 16:30:18,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:30:18,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119455919] [2021-11-05 16:30:18,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 16:30:18,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253079060] [2021-11-05 16:30:18,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253079060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:30:18,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:30:18,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:30:18,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616322175] [2021-11-05 16:30:18,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:30:18,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:30:18,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:30:18,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:30:18,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:30:18,893 INFO L87 Difference]: Start difference. First operand 9915 states and 13840 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:19,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:30:19,345 INFO L93 Difference]: Finished difference Result 23706 states and 33135 transitions. [2021-11-05 16:30:19,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:30:19,345 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 113 [2021-11-05 16:30:19,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:30:19,377 INFO L225 Difference]: With dead ends: 23706 [2021-11-05 16:30:19,377 INFO L226 Difference]: Without dead ends: 18533 [2021-11-05 16:30:19,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.33ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:30:19,388 INFO L933 BasicCegarLoop]: 2405 mSDtfsCounter, 1165 mSDsluCounter, 1219 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1165 SdHoareTripleChecker+Valid, 3624 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.60ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.64ms IncrementalHoareTripleChecker+Time [2021-11-05 16:30:19,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1165 Valid, 3624 Invalid, 112 Unknown, 0 Unchecked, 3.60ms Time], IncrementalHoareTripleChecker [55 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 88.64ms Time] [2021-11-05 16:30:19,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18533 states. [2021-11-05 16:30:19,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18533 to 10091. [2021-11-05 16:30:19,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10091 states, 10090 states have (on average 1.3890981169474728) internal successors, (14016), 10090 states have internal predecessors, (14016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:19,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10091 states to 10091 states and 14016 transitions. [2021-11-05 16:30:19,717 INFO L78 Accepts]: Start accepts. Automaton has 10091 states and 14016 transitions. Word has length 113 [2021-11-05 16:30:19,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:30:19,717 INFO L470 AbstractCegarLoop]: Abstraction has 10091 states and 14016 transitions. [2021-11-05 16:30:19,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:19,718 INFO L276 IsEmpty]: Start isEmpty. Operand 10091 states and 14016 transitions. [2021-11-05 16:30:19,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-05 16:30:19,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:30:19,731 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:30:19,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-05 16:30:19,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-05 16:30:19,934 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:30:19,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:30:19,935 INFO L85 PathProgramCache]: Analyzing trace with hash 2070033409, now seen corresponding path program 1 times [2021-11-05 16:30:19,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:30:19,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779421094] [2021-11-05 16:30:19,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:19,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:30:19,958 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 16:30:19,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [118215257] [2021-11-05 16:30:19,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:19,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:30:19,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:30:19,968 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:30:19,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-05 16:30:20,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:30:20,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 1217 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-05 16:30:20,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:30:20,614 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-05 16:30:20,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:30:20,958 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-05 16:30:20,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:30:20,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779421094] [2021-11-05 16:30:20,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 16:30:20,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118215257] [2021-11-05 16:30:20,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118215257] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 16:30:20,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-05 16:30:20,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-11-05 16:30:20,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452346667] [2021-11-05 16:30:20,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-05 16:30:20,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-05 16:30:20,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:30:20,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-05 16:30:20,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2021-11-05 16:30:20,960 INFO L87 Difference]: Start difference. First operand 10091 states and 14016 transitions. Second operand has 26 states, 26 states have (on average 8.038461538461538) internal successors, (209), 25 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:21,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:30:21,627 INFO L93 Difference]: Finished difference Result 10255 states and 14215 transitions. [2021-11-05 16:30:21,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-05 16:30:21,627 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 8.038461538461538) internal successors, (209), 25 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-05 16:30:21,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:30:21,640 INFO L225 Difference]: With dead ends: 10255 [2021-11-05 16:30:21,640 INFO L226 Difference]: Without dead ends: 10247 [2021-11-05 16:30:21,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 345.95ms TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2021-11-05 16:30:21,645 INFO L933 BasicCegarLoop]: 1380 mSDtfsCounter, 2801 mSDsluCounter, 1618 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 145.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2801 SdHoareTripleChecker+Valid, 2998 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.15ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 199.09ms IncrementalHoareTripleChecker+Time [2021-11-05 16:30:21,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2801 Valid, 2998 Invalid, 121 Unknown, 0 Unchecked, 5.15ms Time], IncrementalHoareTripleChecker [39 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 199.09ms Time] [2021-11-05 16:30:21,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10247 states. [2021-11-05 16:30:21,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10247 to 10247. [2021-11-05 16:30:21,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10247 states, 10246 states have (on average 1.3855162990435292) internal successors, (14196), 10246 states have internal predecessors, (14196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:21,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10247 states to 10247 states and 14196 transitions. [2021-11-05 16:30:21,909 INFO L78 Accepts]: Start accepts. Automaton has 10247 states and 14196 transitions. Word has length 114 [2021-11-05 16:30:21,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:30:21,910 INFO L470 AbstractCegarLoop]: Abstraction has 10247 states and 14196 transitions. [2021-11-05 16:30:21,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.038461538461538) internal successors, (209), 25 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:21,910 INFO L276 IsEmpty]: Start isEmpty. Operand 10247 states and 14196 transitions. [2021-11-05 16:30:21,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-05 16:30:21,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:30:21,926 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:30:21,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-05 16:30:22,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-05 16:30:22,127 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:30:22,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:30:22,127 INFO L85 PathProgramCache]: Analyzing trace with hash 93143669, now seen corresponding path program 2 times [2021-11-05 16:30:22,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:30:22,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850325987] [2021-11-05 16:30:22,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:22,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:30:22,147 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 16:30:22,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [784440774] [2021-11-05 16:30:22,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-05 16:30:22,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:30:22,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:30:22,149 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:30:22,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-05 16:30:22,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-05 16:30:22,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-05 16:30:22,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 1325 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-05 16:30:22,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:30:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-05 16:30:23,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:30:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-05 16:30:24,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:30:24,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850325987] [2021-11-05 16:30:24,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 16:30:24,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784440774] [2021-11-05 16:30:24,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784440774] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 16:30:24,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-05 16:30:24,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2021-11-05 16:30:24,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079204418] [2021-11-05 16:30:24,122 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-05 16:30:24,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-05 16:30:24,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:30:24,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-05 16:30:24,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2021-11-05 16:30:24,125 INFO L87 Difference]: Start difference. First operand 10247 states and 14196 transitions. Second operand has 50 states, 50 states have (on average 6.1) internal successors, (305), 49 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:25,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:30:25,957 INFO L93 Difference]: Finished difference Result 10567 states and 14587 transitions. [2021-11-05 16:30:25,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-05 16:30:25,958 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 6.1) internal successors, (305), 49 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2021-11-05 16:30:25,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:30:25,973 INFO L225 Difference]: With dead ends: 10567 [2021-11-05 16:30:25,973 INFO L226 Difference]: Without dead ends: 10559 [2021-11-05 16:30:25,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1434.36ms TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2021-11-05 16:30:25,977 INFO L933 BasicCegarLoop]: 1380 mSDtfsCounter, 3547 mSDsluCounter, 6004 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 423.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3547 SdHoareTripleChecker+Valid, 7384 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.29ms SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 544.55ms IncrementalHoareTripleChecker+Time [2021-11-05 16:30:25,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3547 Valid, 7384 Invalid, 252 Unknown, 0 Unchecked, 8.29ms Time], IncrementalHoareTripleChecker [74 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 544.55ms Time] [2021-11-05 16:30:25,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10559 states. [2021-11-05 16:30:26,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10559 to 10559. [2021-11-05 16:30:26,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10559 states, 10558 states have (on average 1.3786702026899034) internal successors, (14556), 10558 states have internal predecessors, (14556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:26,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10559 states to 10559 states and 14556 transitions. [2021-11-05 16:30:26,258 INFO L78 Accepts]: Start accepts. Automaton has 10559 states and 14556 transitions. Word has length 162 [2021-11-05 16:30:26,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:30:26,259 INFO L470 AbstractCegarLoop]: Abstraction has 10559 states and 14556 transitions. [2021-11-05 16:30:26,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 6.1) internal successors, (305), 49 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:26,259 INFO L276 IsEmpty]: Start isEmpty. Operand 10559 states and 14556 transitions. [2021-11-05 16:30:26,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-05 16:30:26,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:30:26,273 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:30:26,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-05 16:30:26,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-05 16:30:26,493 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:30:26,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:30:26,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1467697315, now seen corresponding path program 3 times [2021-11-05 16:30:26,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:30:26,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665031497] [2021-11-05 16:30:26,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:26,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:30:26,523 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 16:30:26,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589171389] [2021-11-05 16:30:26,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-05 16:30:26,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:30:26,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:30:26,524 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:30:26,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-05 16:30:26,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-05 16:30:27,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-05 16:30:27,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-05 16:30:27,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:30:27,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4189 trivial. 0 not checked. [2021-11-05 16:30:27,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 16:30:27,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:30:27,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665031497] [2021-11-05 16:30:27,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 16:30:27,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589171389] [2021-11-05 16:30:27,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589171389] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:30:27,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:30:27,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-05 16:30:27,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390135199] [2021-11-05 16:30:27,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:30:27,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-05 16:30:27,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:30:27,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-05 16:30:27,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-05 16:30:27,436 INFO L87 Difference]: Start difference. First operand 10559 states and 14556 transitions. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:32,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:30:32,700 INFO L93 Difference]: Finished difference Result 113232 states and 158515 transitions. [2021-11-05 16:30:32,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-05 16:30:32,712 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 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 258 [2021-11-05 16:30:32,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:30:32,966 INFO L225 Difference]: With dead ends: 113232 [2021-11-05 16:30:32,966 INFO L226 Difference]: Without dead ends: 102750 [2021-11-05 16:30:33,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 525.17ms TimeCoverageRelationStatistics Valid=236, Invalid=634, Unknown=0, NotChecked=0, Total=870 [2021-11-05 16:30:33,009 INFO L933 BasicCegarLoop]: 6766 mSDtfsCounter, 14248 mSDsluCounter, 31319 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 884.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14248 SdHoareTripleChecker+Valid, 38085 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 47.75ms SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1178.81ms IncrementalHoareTripleChecker+Time [2021-11-05 16:30:33,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14248 Valid, 38085 Invalid, 1144 Unknown, 0 Unchecked, 47.75ms Time], IncrementalHoareTripleChecker [87 Valid, 1057 Invalid, 0 Unknown, 0 Unchecked, 1178.81ms Time] [2021-11-05 16:30:33,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102750 states. [2021-11-05 16:30:34,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102750 to 10655. [2021-11-05 16:30:34,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10655 states, 10654 states have (on average 1.3688755397033978) internal successors, (14584), 10654 states have internal predecessors, (14584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:34,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10655 states to 10655 states and 14584 transitions. [2021-11-05 16:30:34,614 INFO L78 Accepts]: Start accepts. Automaton has 10655 states and 14584 transitions. Word has length 258 [2021-11-05 16:30:34,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:30:34,614 INFO L470 AbstractCegarLoop]: Abstraction has 10655 states and 14584 transitions. [2021-11-05 16:30:34,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:34,614 INFO L276 IsEmpty]: Start isEmpty. Operand 10655 states and 14584 transitions. [2021-11-05 16:30:34,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-05 16:30:34,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:30:34,628 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:30:34,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-05 16:30:34,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-05 16:30:34,849 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:30:34,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:30:34,849 INFO L85 PathProgramCache]: Analyzing trace with hash 452496466, now seen corresponding path program 1 times [2021-11-05 16:30:34,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:30:34,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704934177] [2021-11-05 16:30:34,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:34,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:30:34,873 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 16:30:34,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397503127] [2021-11-05 16:30:34,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:34,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:30:34,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:30:34,875 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:30:34,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-05 16:30:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:30:35,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 1501 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-05 16:30:35,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:30:35,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4189 trivial. 0 not checked. [2021-11-05 16:30:35,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 16:30:35,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:30:35,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704934177] [2021-11-05 16:30:35,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 16:30:35,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397503127] [2021-11-05 16:30:35,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397503127] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:30:35,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:30:35,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 16:30:35,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678527881] [2021-11-05 16:30:35,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:30:35,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:30:35,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:30:35,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:30:35,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:30:35,547 INFO L87 Difference]: Start difference. First operand 10655 states and 14584 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:36,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:30:36,794 INFO L93 Difference]: Finished difference Result 25078 states and 34317 transitions. [2021-11-05 16:30:36,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 16:30:36,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 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 259 [2021-11-05 16:30:36,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:30:36,817 INFO L225 Difference]: With dead ends: 25078 [2021-11-05 16:30:36,818 INFO L226 Difference]: Without dead ends: 14018 [2021-11-05 16:30:36,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.06ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:30:36,831 INFO L933 BasicCegarLoop]: 2333 mSDtfsCounter, 2195 mSDsluCounter, 2220 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 259.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2195 SdHoareTripleChecker+Valid, 4553 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.89ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 391.54ms IncrementalHoareTripleChecker+Time [2021-11-05 16:30:36,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2195 Valid, 4553 Invalid, 258 Unknown, 0 Unchecked, 6.89ms Time], IncrementalHoareTripleChecker [37 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 391.54ms Time] [2021-11-05 16:30:36,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14018 states. [2021-11-05 16:30:37,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14018 to 10142. [2021-11-05 16:30:37,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10142 states, 10141 states have (on average 1.3520362883344839) internal successors, (13711), 10141 states have internal predecessors, (13711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:37,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10142 states to 10142 states and 13711 transitions. [2021-11-05 16:30:37,471 INFO L78 Accepts]: Start accepts. Automaton has 10142 states and 13711 transitions. Word has length 259 [2021-11-05 16:30:37,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:30:37,471 INFO L470 AbstractCegarLoop]: Abstraction has 10142 states and 13711 transitions. [2021-11-05 16:30:37,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:37,471 INFO L276 IsEmpty]: Start isEmpty. Operand 10142 states and 13711 transitions. [2021-11-05 16:30:37,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-05 16:30:37,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:30:37,484 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:30:37,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-05 16:30:37,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:30:37,685 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:30:37,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:30:37,685 INFO L85 PathProgramCache]: Analyzing trace with hash -358267325, now seen corresponding path program 1 times [2021-11-05 16:30:37,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:30:37,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279115185] [2021-11-05 16:30:37,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:37,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:30:37,722 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 16:30:37,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735740160] [2021-11-05 16:30:37,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:37,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:30:37,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:30:37,725 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:30:37,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-05 16:30:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:30:38,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 1551 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-05 16:30:38,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:30:39,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-05 16:30:39,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:30:43,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-05 16:30:43,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:30:43,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279115185] [2021-11-05 16:30:43,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 16:30:43,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735740160] [2021-11-05 16:30:43,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735740160] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 16:30:43,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-05 16:30:43,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2021-11-05 16:30:43,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197557334] [2021-11-05 16:30:43,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-05 16:30:43,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-05 16:30:43,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:30:43,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-05 16:30:43,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2021-11-05 16:30:43,311 INFO L87 Difference]: Start difference. First operand 10142 states and 13711 transitions. Second operand has 98 states, 98 states have (on average 5.173469387755102) internal successors, (507), 97 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:52,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:30:52,419 INFO L93 Difference]: Finished difference Result 10774 states and 14486 transitions. [2021-11-05 16:30:52,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-05 16:30:52,421 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 5.173469387755102) internal successors, (507), 97 states have internal predecessors, (507), 0 states have call successors, (0), 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 263 [2021-11-05 16:30:52,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:30:52,434 INFO L225 Difference]: With dead ends: 10774 [2021-11-05 16:30:52,434 INFO L226 Difference]: Without dead ends: 10766 [2021-11-05 16:30:52,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 8155.84ms TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2021-11-05 16:30:52,443 INFO L933 BasicCegarLoop]: 1380 mSDtfsCounter, 9626 mSDsluCounter, 5214 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 784.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9626 SdHoareTripleChecker+Valid, 6594 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.99ms SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1163.14ms IncrementalHoareTripleChecker+Time [2021-11-05 16:30:52,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9626 Valid, 6594 Invalid, 558 Unknown, 0 Unchecked, 20.99ms Time], IncrementalHoareTripleChecker [244 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 1163.14ms Time] [2021-11-05 16:30:52,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10766 states. [2021-11-05 16:30:53,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10766 to 10766. [2021-11-05 16:30:53,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10766 states, 10765 states have (on average 1.3405480724570367) internal successors, (14431), 10765 states have internal predecessors, (14431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:53,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10766 states to 10766 states and 14431 transitions. [2021-11-05 16:30:53,087 INFO L78 Accepts]: Start accepts. Automaton has 10766 states and 14431 transitions. Word has length 263 [2021-11-05 16:30:53,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:30:53,087 INFO L470 AbstractCegarLoop]: Abstraction has 10766 states and 14431 transitions. [2021-11-05 16:30:53,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 5.173469387755102) internal successors, (507), 97 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:30:53,088 INFO L276 IsEmpty]: Start isEmpty. Operand 10766 states and 14431 transitions. [2021-11-05 16:30:53,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2021-11-05 16:30:53,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:30:53,102 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:30:53,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-05 16:30:53,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:30:53,315 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:30:53,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:30:53,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1947926547, now seen corresponding path program 2 times [2021-11-05 16:30:53,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:30:53,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137649098] [2021-11-05 16:30:53,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:30:53,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:30:53,337 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 16:30:53,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216996107] [2021-11-05 16:30:53,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-05 16:30:53,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:30:53,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:30:53,339 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:30:53,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-05 16:30:53,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-05 16:30:53,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-05 16:30:53,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 1983 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-05 16:30:53,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:30:58,617 INFO L134 CoverageAnalysis]: Checked inductivity of 17589 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-05 16:30:58,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:31:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 17589 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-05 16:31:27,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:31:27,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137649098] [2021-11-05 16:31:27,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 16:31:27,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216996107] [2021-11-05 16:31:27,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216996107] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 16:31:27,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-05 16:31:27,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 193 [2021-11-05 16:31:27,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257653098] [2021-11-05 16:31:27,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-05 16:31:27,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2021-11-05 16:31:27,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:31:27,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2021-11-05 16:31:27,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18531, Invalid=18911, Unknown=0, NotChecked=0, Total=37442 [2021-11-05 16:31:27,890 INFO L87 Difference]: Start difference. First operand 10766 states and 14431 transitions. Second operand has 194 states, 194 states have (on average 4.592783505154639) internal successors, (891), 193 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:33:52,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:33:52,259 INFO L93 Difference]: Finished difference Result 12022 states and 15974 transitions. [2021-11-05 16:33:52,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-11-05 16:33:52,264 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 4.592783505154639) internal successors, (891), 193 states have internal predecessors, (891), 0 states have call successors, (0), 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 455 [2021-11-05 16:33:52,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:33:52,277 INFO L225 Difference]: With dead ends: 12022 [2021-11-05 16:33:52,277 INFO L226 Difference]: Without dead ends: 12014 [2021-11-05 16:33:52,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1003 GetRequests, 716 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18145 ImplicationChecksByTransitivity, 136795.39ms TimeCoverageRelationStatistics Valid=36961, Invalid=46271, Unknown=0, NotChecked=0, Total=83232 [2021-11-05 16:33:52,284 INFO L933 BasicCegarLoop]: 1380 mSDtfsCounter, 18049 mSDsluCounter, 7732 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3294.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18049 SdHoareTripleChecker+Valid, 9112 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 57.78ms SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4551.43ms IncrementalHoareTripleChecker+Time [2021-11-05 16:33:52,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18049 Valid, 9112 Invalid, 1092 Unknown, 0 Unchecked, 57.78ms Time], IncrementalHoareTripleChecker [482 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 4551.43ms Time] [2021-11-05 16:33:52,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12014 states. [2021-11-05 16:33:52,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12014 to 12014. [2021-11-05 16:33:52,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12014 states, 12013 states have (on average 1.321152085240989) internal successors, (15871), 12013 states have internal predecessors, (15871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:33:52,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12014 states to 12014 states and 15871 transitions. [2021-11-05 16:33:52,986 INFO L78 Accepts]: Start accepts. Automaton has 12014 states and 15871 transitions. Word has length 455 [2021-11-05 16:33:52,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:33:52,987 INFO L470 AbstractCegarLoop]: Abstraction has 12014 states and 15871 transitions. [2021-11-05 16:33:52,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 4.592783505154639) internal successors, (891), 193 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:33:52,987 INFO L276 IsEmpty]: Start isEmpty. Operand 12014 states and 15871 transitions. [2021-11-05 16:33:53,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2021-11-05 16:33:53,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:33:53,005 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 190, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:33:53,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-05 16:33:53,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:33:53,220 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:33:53,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:33:53,220 INFO L85 PathProgramCache]: Analyzing trace with hash 446428083, now seen corresponding path program 3 times [2021-11-05 16:33:53,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:33:53,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598053496] [2021-11-05 16:33:53,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:33:53,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:33:53,245 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 16:33:53,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276111915] [2021-11-05 16:33:53,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-05 16:33:53,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:33:53,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:33:53,247 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:33:53,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-05 16:33:53,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-05 16:33:53,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-05 16:33:53,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-05 16:33:53,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:33:54,718 INFO L134 CoverageAnalysis]: Checked inductivity of 72021 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 72013 trivial. 0 not checked. [2021-11-05 16:33:54,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 16:33:54,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:33:54,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598053496] [2021-11-05 16:33:54,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 16:33:54,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276111915] [2021-11-05 16:33:54,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276111915] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:33:54,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:33:54,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-05 16:33:54,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645305466] [2021-11-05 16:33:54,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:33:54,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-05 16:33:54,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:33:54,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-05 16:33:54,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-05 16:33:54,721 INFO L87 Difference]: Start difference. First operand 12014 states and 15871 transitions. Second operand has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:34:06,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:34:06,287 INFO L93 Difference]: Finished difference Result 132411 states and 177582 transitions. [2021-11-05 16:34:06,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-05 16:34:06,287 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 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 839 [2021-11-05 16:34:06,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:34:06,500 INFO L225 Difference]: With dead ends: 132411 [2021-11-05 16:34:06,500 INFO L226 Difference]: Without dead ends: 120474 [2021-11-05 16:34:06,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 840 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 766.38ms TimeCoverageRelationStatistics Valid=320, Invalid=870, Unknown=0, NotChecked=0, Total=1190 [2021-11-05 16:34:06,535 INFO L933 BasicCegarLoop]: 5141 mSDtfsCounter, 18472 mSDsluCounter, 33159 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1344.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18472 SdHoareTripleChecker+Valid, 38300 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 45.73ms SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1792.55ms IncrementalHoareTripleChecker+Time [2021-11-05 16:34:06,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18472 Valid, 38300 Invalid, 1244 Unknown, 0 Unchecked, 45.73ms Time], IncrementalHoareTripleChecker [89 Valid, 1155 Invalid, 0 Unknown, 0 Unchecked, 1792.55ms Time] [2021-11-05 16:34:06,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120474 states. [2021-11-05 16:34:08,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120474 to 12086. [2021-11-05 16:34:08,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12086 states, 12085 states have (on average 1.3192387256930078) internal successors, (15943), 12085 states have internal predecessors, (15943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:34:08,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12086 states to 12086 states and 15943 transitions. [2021-11-05 16:34:08,386 INFO L78 Accepts]: Start accepts. Automaton has 12086 states and 15943 transitions. Word has length 839 [2021-11-05 16:34:08,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:34:08,386 INFO L470 AbstractCegarLoop]: Abstraction has 12086 states and 15943 transitions. [2021-11-05 16:34:08,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:34:08,387 INFO L276 IsEmpty]: Start isEmpty. Operand 12086 states and 15943 transitions. [2021-11-05 16:34:08,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2021-11-05 16:34:08,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:34:08,401 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 190, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:34:08,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-05 16:34:08,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:34:08,602 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:34:08,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:34:08,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1798764112, now seen corresponding path program 1 times [2021-11-05 16:34:08,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:34:08,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996830851] [2021-11-05 16:34:08,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:34:08,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:34:08,627 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 16:34:08,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1109620535] [2021-11-05 16:34:08,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:34:08,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:34:08,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:34:08,629 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:34:08,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-05 16:34:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:34:09,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 2955 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-05 16:34:09,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:34:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 72021 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 72013 trivial. 0 not checked. [2021-11-05 16:34:10,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 16:34:10,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:34:10,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996830851] [2021-11-05 16:34:10,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 16:34:10,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109620535] [2021-11-05 16:34:10,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109620535] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:34:10,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:34:10,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-05 16:34:10,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127703965] [2021-11-05 16:34:10,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:34:10,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-05 16:34:10,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:34:10,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-05 16:34:10,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:34:10,135 INFO L87 Difference]: Start difference. First operand 12086 states and 15943 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:34:20,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:34:20,442 INFO L93 Difference]: Finished difference Result 42386 states and 55603 transitions. [2021-11-05 16:34:20,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 16:34:20,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 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 843 [2021-11-05 16:34:20,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:34:20,499 INFO L225 Difference]: With dead ends: 42386 [2021-11-05 16:34:20,499 INFO L226 Difference]: Without dead ends: 34701 [2021-11-05 16:34:20,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 842 GetRequests, 839 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.68ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:34:20,516 INFO L933 BasicCegarLoop]: 2374 mSDtfsCounter, 4792 mSDsluCounter, 3528 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4334.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4792 SdHoareTripleChecker+Valid, 5902 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.41ms SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6360.76ms IncrementalHoareTripleChecker+Time [2021-11-05 16:34:20,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4792 Valid, 5902 Invalid, 803 Unknown, 0 Unchecked, 14.41ms Time], IncrementalHoareTripleChecker [117 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 6360.76ms Time] [2021-11-05 16:34:20,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34701 states. [2021-11-05 16:34:22,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34701 to 21977. [2021-11-05 16:34:22,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21977 states, 21976 states have (on average 1.3446942118674918) internal successors, (29551), 21976 states have internal predecessors, (29551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:34:22,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21977 states to 21977 states and 29551 transitions. [2021-11-05 16:34:22,820 INFO L78 Accepts]: Start accepts. Automaton has 21977 states and 29551 transitions. Word has length 843 [2021-11-05 16:34:22,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:34:22,820 INFO L470 AbstractCegarLoop]: Abstraction has 21977 states and 29551 transitions. [2021-11-05 16:34:22,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:34:22,820 INFO L276 IsEmpty]: Start isEmpty. Operand 21977 states and 29551 transitions. [2021-11-05 16:34:22,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2021-11-05 16:34:22,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:34:22,850 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 190, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:34:22,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-05 16:34:23,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:34:23,051 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:34:23,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:34:23,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1171732177, now seen corresponding path program 1 times [2021-11-05 16:34:23,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:34:23,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306682214] [2021-11-05 16:34:23,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:34:23,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:34:23,078 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 16:34:23,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668840163] [2021-11-05 16:34:23,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:34:23,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:34:23,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:34:23,079 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:34:23,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-05 16:34:23,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:34:23,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 2963 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-05 16:34:23,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:34:24,576 INFO L134 CoverageAnalysis]: Checked inductivity of 72021 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 72013 trivial. 0 not checked. [2021-11-05 16:34:24,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 16:34:24,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:34:24,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306682214] [2021-11-05 16:34:24,577 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-05 16:34:24,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668840163] [2021-11-05 16:34:24,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668840163] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:34:24,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:34:24,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 16:34:24,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186727512] [2021-11-05 16:34:24,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:34:24,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:34:24,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:34:24,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:34:24,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:34:24,578 INFO L87 Difference]: Start difference. First operand 21977 states and 29551 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:34:30,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:34:30,815 INFO L93 Difference]: Finished difference Result 65094 states and 87362 transitions. [2021-11-05 16:34:30,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 16:34:30,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 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 845 [2021-11-05 16:34:30,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:34:30,881 INFO L225 Difference]: With dead ends: 65094 [2021-11-05 16:34:30,881 INFO L226 Difference]: Without dead ends: 47518 [2021-11-05 16:34:30,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 846 GetRequests, 843 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.57ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:34:30,902 INFO L933 BasicCegarLoop]: 3294 mSDtfsCounter, 2369 mSDsluCounter, 3214 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1028.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2369 SdHoareTripleChecker+Valid, 6508 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.00ms SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1517.36ms IncrementalHoareTripleChecker+Time [2021-11-05 16:34:30,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2369 Valid, 6508 Invalid, 472 Unknown, 0 Unchecked, 9.00ms Time], IncrementalHoareTripleChecker [149 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 1517.36ms Time] [2021-11-05 16:34:30,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47518 states. [2021-11-05 16:34:33,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47518 to 21889. [2021-11-05 16:34:33,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21889 states, 21888 states have (on average 1.3342013888888888) internal successors, (29203), 21888 states have internal predecessors, (29203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:34:33,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21889 states to 21889 states and 29203 transitions. [2021-11-05 16:34:33,359 INFO L78 Accepts]: Start accepts. Automaton has 21889 states and 29203 transitions. Word has length 845 [2021-11-05 16:34:33,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:34:33,359 INFO L470 AbstractCegarLoop]: Abstraction has 21889 states and 29203 transitions. [2021-11-05 16:34:33,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:34:33,360 INFO L276 IsEmpty]: Start isEmpty. Operand 21889 states and 29203 transitions. [2021-11-05 16:34:33,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 848 [2021-11-05 16:34:33,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:34:33,388 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 190, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:34:33,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-05 16:34:33,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:34:33,596 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:34:33,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:34:33,596 INFO L85 PathProgramCache]: Analyzing trace with hash -301308712, now seen corresponding path program 1 times [2021-11-05 16:34:33,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:34:33,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790555461] [2021-11-05 16:34:33,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:34:33,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:34:33,620 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-05 16:34:33,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085423752] [2021-11-05 16:34:33,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:34:33,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:34:33,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:34:33,621 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:34:33,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-05 16:34:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:34:34,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 2964 conjuncts, 193 conjunts are in the unsatisfiable core [2021-11-05 16:34:34,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:34:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 72023 backedges. 0 proven. 72010 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-05 16:34:48,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... Killed by 15