./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 173e3943 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.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 fe8c4b1a27642c802f8c97577aadb7892fddcd015ae43c580aa1247dba190651 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 16:19:38,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 16:19:38,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 16:19:39,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 16:19:39,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 16:19:39,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 16:19:39,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 16:19:39,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 16:19:39,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 16:19:39,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 16:19:39,033 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 16:19:39,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 16:19:39,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 16:19:39,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 16:19:39,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 16:19:39,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 16:19:39,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 16:19:39,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 16:19:39,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 16:19:39,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 16:19:39,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 16:19:39,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 16:19:39,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 16:19:39,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 16:19:39,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 16:19:39,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 16:19:39,061 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 16:19:39,062 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 16:19:39,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 16:19:39,064 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 16:19:39,064 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 16:19:39,065 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 16:19:39,067 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 16:19:39,067 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 16:19:39,068 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 16:19:39,069 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 16:19:39,069 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 16:19:39,069 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 16:19:39,070 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 16:19:39,070 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 16:19:39,071 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 16:19:39,072 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 16:19:39,105 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 16:19:39,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 16:19:39,106 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 16:19:39,106 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 16:19:39,108 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 16:19:39,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 16:19:39,108 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 16:19:39,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 16:19:39,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 16:19:39,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 16:19:39,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 16:19:39,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 16:19:39,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 16:19:39,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 16:19:39,110 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 16:19:39,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 16:19:39,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 16:19:39,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 16:19:39,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 16:19:39,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 16:19:39,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 16:19:39,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 16:19:39,112 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 16:19:39,112 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 16:19:39,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 16:19:39,112 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 16:19:39,112 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 16:19:39,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 16:19:39,113 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 16:19:39,113 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe8c4b1a27642c802f8c97577aadb7892fddcd015ae43c580aa1247dba190651 [2021-11-06 16:19:39,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 16:19:39,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 16:19:39,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 16:19:39,399 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 16:19:39,400 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 16:19:39,401 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2021-11-06 16:19:39,460 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79d790a40/9c2972beb300498daadb9ff06f060322/FLAG861bdd8eb [2021-11-06 16:19:40,126 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 16:19:40,126 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2021-11-06 16:19:40,168 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79d790a40/9c2972beb300498daadb9ff06f060322/FLAG861bdd8eb [2021-11-06 16:19:40,442 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79d790a40/9c2972beb300498daadb9ff06f060322 [2021-11-06 16:19:40,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 16:19:40,446 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 16:19:40,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 16:19:40,447 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 16:19:40,450 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 16:19:40,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 04:19:40" (1/1) ... [2021-11-06 16:19:40,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@183c9e35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:19:40, skipping insertion in model container [2021-11-06 16:19:40,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 04:19:40" (1/1) ... [2021-11-06 16:19:40,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 16:19:40,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 16:19:41,108 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-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i[120162,120175] [2021-11-06 16:19:41,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 16:19:41,184 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 16:19:41,336 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i[120162,120175] [2021-11-06 16:19:41,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 16:19:41,379 INFO L208 MainTranslator]: Completed translation [2021-11-06 16:19:41,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:19:41 WrapperNode [2021-11-06 16:19:41,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 16:19:41,382 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 16:19:41,382 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 16:19:41,383 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 16:19:41,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:19:41" (1/1) ... [2021-11-06 16:19:41,426 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:19:41" (1/1) ... [2021-11-06 16:19:41,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 16:19:41,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 16:19:41,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 16:19:41,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 16:19:41,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:19:41" (1/1) ... [2021-11-06 16:19:41,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:19:41" (1/1) ... [2021-11-06 16:19:41,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:19:41" (1/1) ... [2021-11-06 16:19:41,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:19:41" (1/1) ... [2021-11-06 16:19:41,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:19:41" (1/1) ... [2021-11-06 16:19:41,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:19:41" (1/1) ... [2021-11-06 16:19:41,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:19:41" (1/1) ... [2021-11-06 16:19:41,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 16:19:41,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 16:19:41,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 16:19:41,767 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 16:19:41,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:19:41" (1/1) ... [2021-11-06 16:19:41,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 16:19:41,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 16:19:41,805 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-06 16:19:41,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-06 16:19:41,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 16:19:41,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 16:19:41,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 16:19:41,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 16:19:41,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 16:19:41,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 16:19:41,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 16:19:41,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 16:19:41,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 16:19:41,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 16:19:41,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 16:19:41,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 16:19:44,514 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 16:19:44,514 INFO L299 CfgBuilder]: Removed 1215 assume(true) statements. [2021-11-06 16:19:44,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 04:19:44 BoogieIcfgContainer [2021-11-06 16:19:44,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 16:19:44,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 16:19:44,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 16:19:44,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 16:19:44,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 04:19:40" (1/3) ... [2021-11-06 16:19:44,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c5cf7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 04:19:44, skipping insertion in model container [2021-11-06 16:19:44,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:19:41" (2/3) ... [2021-11-06 16:19:44,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c5cf7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 04:19:44, skipping insertion in model container [2021-11-06 16:19:44,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 04:19:44" (3/3) ... [2021-11-06 16:19:44,527 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2021-11-06 16:19:44,532 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 16:19:44,532 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-06 16:19:44,585 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 16:19:44,591 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-06 16:19:44,591 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-06 16:19:44,624 INFO L276 IsEmpty]: Start isEmpty. Operand has 784 states, 782 states have (on average 1.326086956521739) internal successors, (1037), 783 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:44,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-06 16:19:44,638 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:44,638 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:44,639 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:44,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:44,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1882859951, now seen corresponding path program 1 times [2021-11-06 16:19:44,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:44,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014326911] [2021-11-06 16:19:44,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:44,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 16:19:45,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:45,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014326911] [2021-11-06 16:19:45,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014326911] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:45,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:19:45,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 16:19:45,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614515879] [2021-11-06 16:19:45,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-06 16:19:45,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:45,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-06 16:19:45,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 16:19:45,055 INFO L87 Difference]: Start difference. First operand has 784 states, 782 states have (on average 1.326086956521739) internal successors, (1037), 783 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:45,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:45,129 INFO L93 Difference]: Finished difference Result 1564 states and 2069 transitions. [2021-11-06 16:19:45,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-06 16:19:45,151 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-11-06 16:19:45,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:45,165 INFO L225 Difference]: With dead ends: 1564 [2021-11-06 16:19:45,166 INFO L226 Difference]: Without dead ends: 776 [2021-11-06 16:19:45,175 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 16:19:45,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2021-11-06 16:19:45,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 776. [2021-11-06 16:19:45,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 1.2916129032258064) internal successors, (1001), 775 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:45,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1001 transitions. [2021-11-06 16:19:45,258 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1001 transitions. Word has length 55 [2021-11-06 16:19:45,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:45,259 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 1001 transitions. [2021-11-06 16:19:45,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:45,259 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1001 transitions. [2021-11-06 16:19:45,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-06 16:19:45,261 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:45,261 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:45,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 16:19:45,262 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:45,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:45,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1826553015, now seen corresponding path program 1 times [2021-11-06 16:19:45,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:45,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124479015] [2021-11-06 16:19:45,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:45,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 16:19:45,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:45,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124479015] [2021-11-06 16:19:45,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124479015] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:45,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:19:45,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 16:19:45,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865804473] [2021-11-06 16:19:45,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 16:19:45,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:45,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 16:19:45,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:45,418 INFO L87 Difference]: Start difference. First operand 776 states and 1001 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:45,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:45,462 INFO L93 Difference]: Finished difference Result 783 states and 1007 transitions. [2021-11-06 16:19:45,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 16:19:45,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-11-06 16:19:45,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:45,466 INFO L225 Difference]: With dead ends: 783 [2021-11-06 16:19:45,467 INFO L226 Difference]: Without dead ends: 780 [2021-11-06 16:19:45,468 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:45,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-11-06 16:19:45,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 777. [2021-11-06 16:19:45,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 1.291237113402062) internal successors, (1002), 776 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:45,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1002 transitions. [2021-11-06 16:19:45,494 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1002 transitions. Word has length 55 [2021-11-06 16:19:45,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:45,495 INFO L470 AbstractCegarLoop]: Abstraction has 777 states and 1002 transitions. [2021-11-06 16:19:45,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:45,496 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1002 transitions. [2021-11-06 16:19:45,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-06 16:19:45,501 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:45,501 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:45,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 16:19:45,502 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:45,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:45,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1826493433, now seen corresponding path program 1 times [2021-11-06 16:19:45,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:45,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979607890] [2021-11-06 16:19:45,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:45,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:45,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 16:19:45,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:45,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979607890] [2021-11-06 16:19:45,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979607890] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:45,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:19:45,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 16:19:45,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003596115] [2021-11-06 16:19:45,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 16:19:45,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:45,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 16:19:45,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:45,679 INFO L87 Difference]: Start difference. First operand 777 states and 1002 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:45,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:45,760 INFO L93 Difference]: Finished difference Result 1517 states and 1961 transitions. [2021-11-06 16:19:45,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 16:19:45,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-11-06 16:19:45,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:45,767 INFO L225 Difference]: With dead ends: 1517 [2021-11-06 16:19:45,768 INFO L226 Difference]: Without dead ends: 1470 [2021-11-06 16:19:45,769 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:45,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2021-11-06 16:19:45,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1469. [2021-11-06 16:19:45,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 1468 states have (on average 1.2970027247956404) internal successors, (1904), 1468 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:45,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 1904 transitions. [2021-11-06 16:19:45,818 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 1904 transitions. Word has length 55 [2021-11-06 16:19:45,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:45,820 INFO L470 AbstractCegarLoop]: Abstraction has 1469 states and 1904 transitions. [2021-11-06 16:19:45,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:45,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 1904 transitions. [2021-11-06 16:19:45,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-06 16:19:45,823 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:45,824 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:45,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 16:19:45,825 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:45,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:45,826 INFO L85 PathProgramCache]: Analyzing trace with hash -626449298, now seen corresponding path program 1 times [2021-11-06 16:19:45,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:45,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281456531] [2021-11-06 16:19:45,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:45,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 16:19:45,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:45,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281456531] [2021-11-06 16:19:45,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281456531] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:45,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:19:45,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 16:19:45,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420131262] [2021-11-06 16:19:45,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 16:19:45,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:45,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 16:19:45,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:45,924 INFO L87 Difference]: Start difference. First operand 1469 states and 1904 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:46,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:46,030 INFO L93 Difference]: Finished difference Result 3318 states and 4293 transitions. [2021-11-06 16:19:46,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 16:19:46,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-06 16:19:46,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:46,039 INFO L225 Difference]: With dead ends: 3318 [2021-11-06 16:19:46,039 INFO L226 Difference]: Without dead ends: 1886 [2021-11-06 16:19:46,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:46,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2021-11-06 16:19:46,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 1844. [2021-11-06 16:19:46,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1843 states have (on average 1.2930005425935973) internal successors, (2383), 1843 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:46,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 2383 transitions. [2021-11-06 16:19:46,111 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 2383 transitions. Word has length 86 [2021-11-06 16:19:46,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:46,112 INFO L470 AbstractCegarLoop]: Abstraction has 1844 states and 2383 transitions. [2021-11-06 16:19:46,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:46,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 2383 transitions. [2021-11-06 16:19:46,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-06 16:19:46,121 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:46,121 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:46,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 16:19:46,122 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:46,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:46,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1348298836, now seen corresponding path program 1 times [2021-11-06 16:19:46,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:46,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366977338] [2021-11-06 16:19:46,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:46,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:46,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-06 16:19:46,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:46,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366977338] [2021-11-06 16:19:46,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366977338] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:46,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:19:46,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 16:19:46,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752582448] [2021-11-06 16:19:46,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 16:19:46,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:46,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 16:19:46,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 16:19:46,307 INFO L87 Difference]: Start difference. First operand 1844 states and 2383 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:46,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:46,713 INFO L93 Difference]: Finished difference Result 6732 states and 8859 transitions. [2021-11-06 16:19:46,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 16:19:46,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-11-06 16:19:46,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:46,737 INFO L225 Difference]: With dead ends: 6732 [2021-11-06 16:19:46,737 INFO L226 Difference]: Without dead ends: 4925 [2021-11-06 16:19:46,743 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 16:19:46,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4925 states. [2021-11-06 16:19:46,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4925 to 1860. [2021-11-06 16:19:46,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 1.2904787520172136) internal successors, (2399), 1859 states have internal predecessors, (2399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:46,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 2399 transitions. [2021-11-06 16:19:46,878 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 2399 transitions. Word has length 151 [2021-11-06 16:19:46,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:46,879 INFO L470 AbstractCegarLoop]: Abstraction has 1860 states and 2399 transitions. [2021-11-06 16:19:46,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:46,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 2399 transitions. [2021-11-06 16:19:46,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-06 16:19:46,883 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:46,883 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:46,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 16:19:46,884 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:46,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:46,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1581998956, now seen corresponding path program 1 times [2021-11-06 16:19:46,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:46,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232002291] [2021-11-06 16:19:46,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:46,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:47,150 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-06 16:19:47,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:47,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232002291] [2021-11-06 16:19:47,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232002291] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:47,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:19:47,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 16:19:47,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360215758] [2021-11-06 16:19:47,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 16:19:47,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:47,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 16:19:47,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 16:19:47,156 INFO L87 Difference]: Start difference. First operand 1860 states and 2399 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:47,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:47,790 INFO L93 Difference]: Finished difference Result 5326 states and 6867 transitions. [2021-11-06 16:19:47,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 16:19:47,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2021-11-06 16:19:47,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:47,803 INFO L225 Difference]: With dead ends: 5326 [2021-11-06 16:19:47,804 INFO L226 Difference]: Without dead ends: 3503 [2021-11-06 16:19:47,807 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 16:19:47,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3503 states. [2021-11-06 16:19:47,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3503 to 2232. [2021-11-06 16:19:47,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 1.27341999103541) internal successors, (2841), 2231 states have internal predecessors, (2841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:47,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 2841 transitions. [2021-11-06 16:19:47,919 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 2841 transitions. Word has length 159 [2021-11-06 16:19:47,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:47,919 INFO L470 AbstractCegarLoop]: Abstraction has 2232 states and 2841 transitions. [2021-11-06 16:19:47,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:47,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 2841 transitions. [2021-11-06 16:19:47,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-06 16:19:47,923 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:47,923 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:47,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 16:19:47,924 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:47,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:47,924 INFO L85 PathProgramCache]: Analyzing trace with hash 325951085, now seen corresponding path program 1 times [2021-11-06 16:19:47,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:47,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895418082] [2021-11-06 16:19:47,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:47,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:48,037 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-06 16:19:48,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:48,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895418082] [2021-11-06 16:19:48,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895418082] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:48,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:19:48,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 16:19:48,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317622664] [2021-11-06 16:19:48,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 16:19:48,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:48,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 16:19:48,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:48,040 INFO L87 Difference]: Start difference. First operand 2232 states and 2841 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:48,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:48,160 INFO L93 Difference]: Finished difference Result 4427 states and 5639 transitions. [2021-11-06 16:19:48,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 16:19:48,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 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 172 [2021-11-06 16:19:48,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:48,170 INFO L225 Difference]: With dead ends: 4427 [2021-11-06 16:19:48,170 INFO L226 Difference]: Without dead ends: 2232 [2021-11-06 16:19:48,175 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:48,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2021-11-06 16:19:48,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 2232. [2021-11-06 16:19:48,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 1.2698341550874048) internal successors, (2833), 2231 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:48,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 2833 transitions. [2021-11-06 16:19:48,289 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 2833 transitions. Word has length 172 [2021-11-06 16:19:48,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:48,289 INFO L470 AbstractCegarLoop]: Abstraction has 2232 states and 2833 transitions. [2021-11-06 16:19:48,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:48,290 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 2833 transitions. [2021-11-06 16:19:48,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-06 16:19:48,293 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:48,294 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:48,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 16:19:48,295 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:48,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:48,295 INFO L85 PathProgramCache]: Analyzing trace with hash 932207730, now seen corresponding path program 1 times [2021-11-06 16:19:48,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:48,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780910795] [2021-11-06 16:19:48,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:48,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:48,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-06 16:19:48,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:48,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780910795] [2021-11-06 16:19:48,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780910795] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:48,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:19:48,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 16:19:48,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851085662] [2021-11-06 16:19:48,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 16:19:48,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:48,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 16:19:48,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:48,421 INFO L87 Difference]: Start difference. First operand 2232 states and 2833 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:48,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:48,700 INFO L93 Difference]: Finished difference Result 5674 states and 7279 transitions. [2021-11-06 16:19:48,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 16:19:48,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-11-06 16:19:48,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:48,713 INFO L225 Difference]: With dead ends: 5674 [2021-11-06 16:19:48,714 INFO L226 Difference]: Without dead ends: 3479 [2021-11-06 16:19:48,719 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:48,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3479 states. [2021-11-06 16:19:48,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3479 to 2268. [2021-11-06 16:19:48,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2268 states, 2267 states have (on average 1.2637847375385973) internal successors, (2865), 2267 states have internal predecessors, (2865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2268 states to 2268 states and 2865 transitions. [2021-11-06 16:19:48,842 INFO L78 Accepts]: Start accepts. Automaton has 2268 states and 2865 transitions. Word has length 174 [2021-11-06 16:19:48,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:48,842 INFO L470 AbstractCegarLoop]: Abstraction has 2268 states and 2865 transitions. [2021-11-06 16:19:48,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:48,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2268 states and 2865 transitions. [2021-11-06 16:19:48,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-06 16:19:48,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:48,847 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:48,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-06 16:19:48,847 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:48,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:48,848 INFO L85 PathProgramCache]: Analyzing trace with hash 657055926, now seen corresponding path program 1 times [2021-11-06 16:19:48,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:48,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45871109] [2021-11-06 16:19:48,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:48,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:48,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 16:19:48,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:48,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45871109] [2021-11-06 16:19:48,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45871109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:19:48,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050480194] [2021-11-06 16:19:48,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:48,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 16:19:48,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 16:19:48,991 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 16:19:48,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-06 16:19:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:49,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 1814 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-06 16:19:49,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 16:19:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 16:19:49,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050480194] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:49,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 16:19:49,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-06 16:19:49,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158661844] [2021-11-06 16:19:49,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 16:19:49,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:49,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 16:19:49,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-06 16:19:49,989 INFO L87 Difference]: Start difference. First operand 2268 states and 2865 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:50,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:50,096 INFO L93 Difference]: Finished difference Result 4499 states and 5687 transitions. [2021-11-06 16:19:50,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 16:19:50,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-11-06 16:19:50,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:50,105 INFO L225 Difference]: With dead ends: 4499 [2021-11-06 16:19:50,106 INFO L226 Difference]: Without dead ends: 2268 [2021-11-06 16:19:50,110 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-06 16:19:50,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2021-11-06 16:19:50,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 2268. [2021-11-06 16:19:50,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2268 states, 2267 states have (on average 1.262902514336127) internal successors, (2863), 2267 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:50,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2268 states to 2268 states and 2863 transitions. [2021-11-06 16:19:50,217 INFO L78 Accepts]: Start accepts. Automaton has 2268 states and 2863 transitions. Word has length 174 [2021-11-06 16:19:50,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:50,218 INFO L470 AbstractCegarLoop]: Abstraction has 2268 states and 2863 transitions. [2021-11-06 16:19:50,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:50,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2268 states and 2863 transitions. [2021-11-06 16:19:50,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-06 16:19:50,222 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:50,222 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:50,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-06 16:19:50,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 16:19:50,447 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:50,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:50,447 INFO L85 PathProgramCache]: Analyzing trace with hash -553307982, now seen corresponding path program 1 times [2021-11-06 16:19:50,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:50,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414573720] [2021-11-06 16:19:50,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:50,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 16:19:50,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:50,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414573720] [2021-11-06 16:19:50,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414573720] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:50,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:19:50,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 16:19:50,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006297531] [2021-11-06 16:19:50,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 16:19:50,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:50,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 16:19:50,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 16:19:50,603 INFO L87 Difference]: Start difference. First operand 2268 states and 2863 transitions. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:51,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:51,049 INFO L93 Difference]: Finished difference Result 10780 states and 13617 transitions. [2021-11-06 16:19:51,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 16:19:51,051 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 0 states have call successors, (0), 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 176 [2021-11-06 16:19:51,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:51,088 INFO L225 Difference]: With dead ends: 10780 [2021-11-06 16:19:51,088 INFO L226 Difference]: Without dead ends: 8549 [2021-11-06 16:19:51,098 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 16:19:51,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8549 states. [2021-11-06 16:19:51,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8549 to 2272. [2021-11-06 16:19:51,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2271 states have (on average 1.2624394539850285) internal successors, (2867), 2271 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:51,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 2867 transitions. [2021-11-06 16:19:51,293 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 2867 transitions. Word has length 176 [2021-11-06 16:19:51,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:51,293 INFO L470 AbstractCegarLoop]: Abstraction has 2272 states and 2867 transitions. [2021-11-06 16:19:51,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:51,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 2867 transitions. [2021-11-06 16:19:51,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-06 16:19:51,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:51,298 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:51,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-06 16:19:51,298 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:51,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:51,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1382636340, now seen corresponding path program 1 times [2021-11-06 16:19:51,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:51,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372435613] [2021-11-06 16:19:51,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:51,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 16:19:51,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:51,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372435613] [2021-11-06 16:19:51,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372435613] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:51,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:19:51,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-06 16:19:51,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639297118] [2021-11-06 16:19:51,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 16:19:51,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:51,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 16:19:51,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-06 16:19:51,456 INFO L87 Difference]: Start difference. First operand 2272 states and 2867 transitions. Second operand has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:52,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:52,989 INFO L93 Difference]: Finished difference Result 19300 states and 24371 transitions. [2021-11-06 16:19:52,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-06 16:19:52,990 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 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 177 [2021-11-06 16:19:52,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:53,030 INFO L225 Difference]: With dead ends: 19300 [2021-11-06 16:19:53,030 INFO L226 Difference]: Without dead ends: 17065 [2021-11-06 16:19:53,040 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-11-06 16:19:53,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17065 states. [2021-11-06 16:19:53,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17065 to 2276. [2021-11-06 16:19:53,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 1.261978021978022) internal successors, (2871), 2275 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:53,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 2871 transitions. [2021-11-06 16:19:53,381 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 2871 transitions. Word has length 177 [2021-11-06 16:19:53,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:53,381 INFO L470 AbstractCegarLoop]: Abstraction has 2276 states and 2871 transitions. [2021-11-06 16:19:53,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:53,382 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 2871 transitions. [2021-11-06 16:19:53,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-06 16:19:53,385 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:53,386 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:53,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-06 16:19:53,386 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:53,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:53,387 INFO L85 PathProgramCache]: Analyzing trace with hash -306307402, now seen corresponding path program 1 times [2021-11-06 16:19:53,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:53,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010349604] [2021-11-06 16:19:53,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:53,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 16:19:53,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:53,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010349604] [2021-11-06 16:19:53,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010349604] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:53,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:19:53,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 16:19:53,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068553681] [2021-11-06 16:19:53,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 16:19:53,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:53,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 16:19:53,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:53,507 INFO L87 Difference]: Start difference. First operand 2276 states and 2871 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:54,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:54,204 INFO L93 Difference]: Finished difference Result 5675 states and 7233 transitions. [2021-11-06 16:19:54,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 16:19:54,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 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 177 [2021-11-06 16:19:54,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:54,217 INFO L225 Difference]: With dead ends: 5675 [2021-11-06 16:19:54,218 INFO L226 Difference]: Without dead ends: 3387 [2021-11-06 16:19:54,223 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:54,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3387 states. [2021-11-06 16:19:54,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3387 to 3387. [2021-11-06 16:19:54,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3387 states, 3386 states have (on average 1.2796810395747193) internal successors, (4333), 3386 states have internal predecessors, (4333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:54,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3387 states to 3387 states and 4333 transitions. [2021-11-06 16:19:54,564 INFO L78 Accepts]: Start accepts. Automaton has 3387 states and 4333 transitions. Word has length 177 [2021-11-06 16:19:54,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:54,564 INFO L470 AbstractCegarLoop]: Abstraction has 3387 states and 4333 transitions. [2021-11-06 16:19:54,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:54,565 INFO L276 IsEmpty]: Start isEmpty. Operand 3387 states and 4333 transitions. [2021-11-06 16:19:54,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-06 16:19:54,573 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:54,574 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:54,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-06 16:19:54,574 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:54,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:54,575 INFO L85 PathProgramCache]: Analyzing trace with hash 569711604, now seen corresponding path program 1 times [2021-11-06 16:19:54,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:54,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290148475] [2021-11-06 16:19:54,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:54,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:54,684 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 16:19:54,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:54,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290148475] [2021-11-06 16:19:54,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290148475] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:54,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:19:54,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 16:19:54,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958750081] [2021-11-06 16:19:54,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 16:19:54,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:54,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 16:19:54,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 16:19:54,688 INFO L87 Difference]: Start difference. First operand 3387 states and 4333 transitions. Second operand has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:55,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:55,057 INFO L93 Difference]: Finished difference Result 7903 states and 10149 transitions. [2021-11-06 16:19:55,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 16:19:55,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 0 states have call successors, (0), 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 177 [2021-11-06 16:19:55,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:55,072 INFO L225 Difference]: With dead ends: 7903 [2021-11-06 16:19:55,072 INFO L226 Difference]: Without dead ends: 4553 [2021-11-06 16:19:55,078 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 16:19:55,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4553 states. [2021-11-06 16:19:55,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4553 to 3391. [2021-11-06 16:19:55,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3391 states, 3390 states have (on average 1.2793510324483777) internal successors, (4337), 3390 states have internal predecessors, (4337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:55,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3391 states to 3391 states and 4337 transitions. [2021-11-06 16:19:55,327 INFO L78 Accepts]: Start accepts. Automaton has 3391 states and 4337 transitions. Word has length 177 [2021-11-06 16:19:55,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:55,329 INFO L470 AbstractCegarLoop]: Abstraction has 3391 states and 4337 transitions. [2021-11-06 16:19:55,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.75) internal successors, (175), 4 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:55,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3391 states and 4337 transitions. [2021-11-06 16:19:55,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-06 16:19:55,335 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:55,336 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:55,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-06 16:19:55,336 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:55,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:55,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1021424611, now seen corresponding path program 1 times [2021-11-06 16:19:55,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:55,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501910906] [2021-11-06 16:19:55,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:55,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:55,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 16:19:55,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:55,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501910906] [2021-11-06 16:19:55,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501910906] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:55,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:19:55,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 16:19:55,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136085905] [2021-11-06 16:19:55,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 16:19:55,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:55,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 16:19:55,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 16:19:55,528 INFO L87 Difference]: Start difference. First operand 3391 states and 4337 transitions. Second operand has 5 states, 5 states have (on average 35.6) internal successors, (178), 5 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:56,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:56,331 INFO L93 Difference]: Finished difference Result 10051 states and 13115 transitions. [2021-11-06 16:19:56,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 16:19:56,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.6) internal successors, (178), 5 states have internal predecessors, (178), 0 states have call successors, (0), 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 180 [2021-11-06 16:19:56,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:56,346 INFO L225 Difference]: With dead ends: 10051 [2021-11-06 16:19:56,346 INFO L226 Difference]: Without dead ends: 6697 [2021-11-06 16:19:56,354 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 16:19:56,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6697 states. [2021-11-06 16:19:56,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6697 to 3571. [2021-11-06 16:19:56,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 1.265266106442577) internal successors, (4517), 3570 states have internal predecessors, (4517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:56,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 4517 transitions. [2021-11-06 16:19:56,676 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 4517 transitions. Word has length 180 [2021-11-06 16:19:56,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:56,677 INFO L470 AbstractCegarLoop]: Abstraction has 3571 states and 4517 transitions. [2021-11-06 16:19:56,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.6) internal successors, (178), 5 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:56,677 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 4517 transitions. [2021-11-06 16:19:56,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-06 16:19:56,682 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:56,683 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:56,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-06 16:19:56,683 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:56,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:56,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1687363285, now seen corresponding path program 1 times [2021-11-06 16:19:56,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:56,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838477070] [2021-11-06 16:19:56,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:56,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:56,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-06 16:19:56,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:56,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838477070] [2021-11-06 16:19:56,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838477070] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:56,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:19:56,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 16:19:56,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760194584] [2021-11-06 16:19:56,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 16:19:56,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:56,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 16:19:56,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:56,877 INFO L87 Difference]: Start difference. First operand 3571 states and 4517 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:57,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:57,137 INFO L93 Difference]: Finished difference Result 7126 states and 9021 transitions. [2021-11-06 16:19:57,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 16:19:57,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 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 184 [2021-11-06 16:19:57,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:57,145 INFO L225 Difference]: With dead ends: 7126 [2021-11-06 16:19:57,145 INFO L226 Difference]: Without dead ends: 3575 [2021-11-06 16:19:57,151 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:57,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3575 states. [2021-11-06 16:19:57,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3575 to 3575. [2021-11-06 16:19:57,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3575 states, 3574 states have (on average 1.2649692221600448) internal successors, (4521), 3574 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:57,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3575 states to 3575 states and 4521 transitions. [2021-11-06 16:19:57,497 INFO L78 Accepts]: Start accepts. Automaton has 3575 states and 4521 transitions. Word has length 184 [2021-11-06 16:19:57,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:57,497 INFO L470 AbstractCegarLoop]: Abstraction has 3575 states and 4521 transitions. [2021-11-06 16:19:57,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:57,497 INFO L276 IsEmpty]: Start isEmpty. Operand 3575 states and 4521 transitions. [2021-11-06 16:19:57,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-06 16:19:57,503 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:57,503 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:57,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-06 16:19:57,503 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:57,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:57,504 INFO L85 PathProgramCache]: Analyzing trace with hash -142517545, now seen corresponding path program 1 times [2021-11-06 16:19:57,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:57,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592502706] [2021-11-06 16:19:57,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:57,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-06 16:19:57,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:57,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592502706] [2021-11-06 16:19:57,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592502706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:19:57,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490026709] [2021-11-06 16:19:57,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:57,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 16:19:57,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 16:19:57,705 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 16:19:57,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-06 16:19:58,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:58,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 1959 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-06 16:19:58,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 16:19:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-06 16:19:58,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490026709] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:19:58,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 16:19:58,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-06 16:19:58,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505686651] [2021-11-06 16:19:58,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 16:19:58,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:58,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 16:19:58,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 16:19:58,990 INFO L87 Difference]: Start difference. First operand 3575 states and 4521 transitions. Second operand has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:59,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:59,367 INFO L93 Difference]: Finished difference Result 7133 states and 9028 transitions. [2021-11-06 16:19:59,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 16:19:59,368 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 0 states have call successors, (0), 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 188 [2021-11-06 16:19:59,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:59,375 INFO L225 Difference]: With dead ends: 7133 [2021-11-06 16:19:59,375 INFO L226 Difference]: Without dead ends: 3579 [2021-11-06 16:19:59,381 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 16:19:59,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3579 states. [2021-11-06 16:19:59,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3579 to 3579. [2021-11-06 16:19:59,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3579 states, 3578 states have (on average 1.2646730016769145) internal successors, (4525), 3578 states have internal predecessors, (4525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:59,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3579 states to 3579 states and 4525 transitions. [2021-11-06 16:19:59,615 INFO L78 Accepts]: Start accepts. Automaton has 3579 states and 4525 transitions. Word has length 188 [2021-11-06 16:19:59,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:59,615 INFO L470 AbstractCegarLoop]: Abstraction has 3579 states and 4525 transitions. [2021-11-06 16:19:59,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:59,615 INFO L276 IsEmpty]: Start isEmpty. Operand 3579 states and 4525 transitions. [2021-11-06 16:19:59,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-06 16:19:59,620 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:59,621 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:59,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-06 16:19:59,835 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,SelfDestructingSolverStorable15 [2021-11-06 16:19:59,836 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:59,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:59,836 INFO L85 PathProgramCache]: Analyzing trace with hash 787824277, now seen corresponding path program 2 times [2021-11-06 16:19:59,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:59,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893584963] [2021-11-06 16:19:59,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:59,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:59,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:20:00,084 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-06 16:20:00,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:20:00,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893584963] [2021-11-06 16:20:00,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893584963] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:20:00,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916635631] [2021-11-06 16:20:00,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 16:20:00,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 16:20:00,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 16:20:00,086 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 16:20:00,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-06 16:20:00,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-06 16:20:00,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 16:20:00,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 1034 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-06 16:20:00,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 16:20:01,214 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-06 16:20:01,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916635631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:20:01,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 16:20:01,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-06 16:20:01,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813905167] [2021-11-06 16:20:01,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 16:20:01,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:20:01,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 16:20:01,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-06 16:20:01,216 INFO L87 Difference]: Start difference. First operand 3579 states and 4525 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:01,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:20:01,605 INFO L93 Difference]: Finished difference Result 7130 states and 9021 transitions. [2021-11-06 16:20:01,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 16:20:01,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 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 192 [2021-11-06 16:20:01,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:20:01,614 INFO L225 Difference]: With dead ends: 7130 [2021-11-06 16:20:01,614 INFO L226 Difference]: Without dead ends: 3581 [2021-11-06 16:20:01,620 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-06 16:20:01,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3581 states. [2021-11-06 16:20:01,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3581 to 3581. [2021-11-06 16:20:01,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3581 states, 3580 states have (on average 1.2645251396648045) internal successors, (4527), 3580 states have internal predecessors, (4527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:01,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 4527 transitions. [2021-11-06 16:20:01,887 INFO L78 Accepts]: Start accepts. Automaton has 3581 states and 4527 transitions. Word has length 192 [2021-11-06 16:20:01,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:20:01,888 INFO L470 AbstractCegarLoop]: Abstraction has 3581 states and 4527 transitions. [2021-11-06 16:20:01,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:01,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3581 states and 4527 transitions. [2021-11-06 16:20:01,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-06 16:20:01,892 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:20:01,892 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:20:01,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-06 16:20:02,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 16:20:02,120 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:20:02,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:20:02,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1713157909, now seen corresponding path program 1 times [2021-11-06 16:20:02,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:20:02,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628603285] [2021-11-06 16:20:02,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:20:02,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:20:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:20:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-06 16:20:02,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:20:02,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628603285] [2021-11-06 16:20:02,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628603285] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:20:02,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145676444] [2021-11-06 16:20:02,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:20:02,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 16:20:02,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 16:20:02,345 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 16:20:02,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-06 16:20:03,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:20:03,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 1995 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-06 16:20:03,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 16:20:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-06 16:20:04,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145676444] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:20:04,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 16:20:04,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-06 16:20:04,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084007036] [2021-11-06 16:20:04,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 16:20:04,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:20:04,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 16:20:04,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-06 16:20:04,031 INFO L87 Difference]: Start difference. First operand 3581 states and 4527 transitions. Second operand has 6 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:04,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:20:04,524 INFO L93 Difference]: Finished difference Result 7144 states and 9039 transitions. [2021-11-06 16:20:04,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 16:20:04,525 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 0 states have call successors, (0), 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 194 [2021-11-06 16:20:04,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:20:04,533 INFO L225 Difference]: With dead ends: 7144 [2021-11-06 16:20:04,533 INFO L226 Difference]: Without dead ends: 3585 [2021-11-06 16:20:04,538 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-06 16:20:04,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2021-11-06 16:20:04,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 3585. [2021-11-06 16:20:04,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3585 states, 3584 states have (on average 1.2642299107142858) internal successors, (4531), 3584 states have internal predecessors, (4531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:04,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3585 states to 3585 states and 4531 transitions. [2021-11-06 16:20:04,859 INFO L78 Accepts]: Start accepts. Automaton has 3585 states and 4531 transitions. Word has length 194 [2021-11-06 16:20:04,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:20:04,859 INFO L470 AbstractCegarLoop]: Abstraction has 3585 states and 4531 transitions. [2021-11-06 16:20:04,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:04,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3585 states and 4531 transitions. [2021-11-06 16:20:04,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-06 16:20:04,864 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:20:04,864 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:20:04,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-06 16:20:05,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-06 16:20:05,078 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:20:05,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:20:05,079 INFO L85 PathProgramCache]: Analyzing trace with hash 719283163, now seen corresponding path program 2 times [2021-11-06 16:20:05,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:20:05,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673394205] [2021-11-06 16:20:05,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:20:05,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:20:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:20:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-06 16:20:05,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:20:05,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673394205] [2021-11-06 16:20:05,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673394205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:20:05,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545004291] [2021-11-06 16:20:05,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 16:20:05,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 16:20:05,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 16:20:05,321 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 16:20:05,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-06 16:20:08,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 16:20:08,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 16:20:08,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 2019 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-06 16:20:08,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 16:20:08,953 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-06 16:20:08,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545004291] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:20:08,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 16:20:08,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-06 16:20:08,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356363344] [2021-11-06 16:20:08,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 16:20:08,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:20:08,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 16:20:08,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-06 16:20:08,955 INFO L87 Difference]: Start difference. First operand 3585 states and 4531 transitions. Second operand has 7 states, 7 states have (on average 27.714285714285715) internal successors, (194), 7 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:09,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:20:09,285 INFO L93 Difference]: Finished difference Result 7151 states and 9046 transitions. [2021-11-06 16:20:09,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 16:20:09,286 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 27.714285714285715) internal successors, (194), 7 states have internal predecessors, (194), 0 states have call successors, (0), 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 198 [2021-11-06 16:20:09,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:20:09,291 INFO L225 Difference]: With dead ends: 7151 [2021-11-06 16:20:09,291 INFO L226 Difference]: Without dead ends: 3589 [2021-11-06 16:20:09,297 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 196 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-06 16:20:09,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3589 states. [2021-11-06 16:20:09,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3589 to 3589. [2021-11-06 16:20:09,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3589 states, 3588 states have (on average 1.2639353400222966) internal successors, (4535), 3588 states have internal predecessors, (4535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:09,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3589 states to 3589 states and 4535 transitions. [2021-11-06 16:20:09,695 INFO L78 Accepts]: Start accepts. Automaton has 3589 states and 4535 transitions. Word has length 198 [2021-11-06 16:20:09,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:20:09,696 INFO L470 AbstractCegarLoop]: Abstraction has 3589 states and 4535 transitions. [2021-11-06 16:20:09,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.714285714285715) internal successors, (194), 7 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:09,696 INFO L276 IsEmpty]: Start isEmpty. Operand 3589 states and 4535 transitions. [2021-11-06 16:20:09,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-06 16:20:09,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:20:09,701 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:20:09,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-06 16:20:09,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 16:20:09,928 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:20:09,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:20:09,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1943981653, now seen corresponding path program 3 times [2021-11-06 16:20:09,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:20:09,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407981841] [2021-11-06 16:20:09,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:20:09,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:20:10,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:20:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-06 16:20:10,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:20:10,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407981841] [2021-11-06 16:20:10,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407981841] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:20:10,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56479333] [2021-11-06 16:20:10,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 16:20:10,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 16:20:10,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 16:20:10,239 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 16:20:10,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-06 16:20:12,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-06 16:20:12,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 16:20:12,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-06 16:20:12,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 16:20:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-06 16:20:12,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56479333] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:20:12,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 16:20:12,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-11-06 16:20:12,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114717290] [2021-11-06 16:20:12,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 16:20:12,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:20:12,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 16:20:12,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-06 16:20:12,863 INFO L87 Difference]: Start difference. First operand 3589 states and 4535 transitions. Second operand has 9 states, 9 states have (on average 22.0) internal successors, (198), 9 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:13,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:20:13,193 INFO L93 Difference]: Finished difference Result 7160 states and 9057 transitions. [2021-11-06 16:20:13,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 16:20:13,194 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 22.0) internal successors, (198), 9 states have internal predecessors, (198), 0 states have call successors, (0), 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 202 [2021-11-06 16:20:13,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:20:13,199 INFO L225 Difference]: With dead ends: 7160 [2021-11-06 16:20:13,199 INFO L226 Difference]: Without dead ends: 3595 [2021-11-06 16:20:13,204 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-06 16:20:13,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3595 states. [2021-11-06 16:20:13,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3595 to 3595. [2021-11-06 16:20:13,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3595 states, 3594 states have (on average 1.2634947134112409) internal successors, (4541), 3594 states have internal predecessors, (4541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:13,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3595 states to 3595 states and 4541 transitions. [2021-11-06 16:20:13,492 INFO L78 Accepts]: Start accepts. Automaton has 3595 states and 4541 transitions. Word has length 202 [2021-11-06 16:20:13,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:20:13,492 INFO L470 AbstractCegarLoop]: Abstraction has 3595 states and 4541 transitions. [2021-11-06 16:20:13,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 22.0) internal successors, (198), 9 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:13,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3595 states and 4541 transitions. [2021-11-06 16:20:13,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-06 16:20:13,497 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:20:13,497 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:20:13,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-06 16:20:13,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 16:20:13,708 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:20:13,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:20:13,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1074641495, now seen corresponding path program 4 times [2021-11-06 16:20:13,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:20:13,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438929024] [2021-11-06 16:20:13,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:20:13,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:20:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:20:14,006 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-06 16:20:14,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:20:14,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438929024] [2021-11-06 16:20:14,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438929024] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:20:14,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588491714] [2021-11-06 16:20:14,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-06 16:20:14,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 16:20:14,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 16:20:14,012 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 16:20:14,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-06 16:20:15,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-06 16:20:15,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 16:20:15,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 2079 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-06 16:20:15,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 16:20:16,185 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-06 16:20:16,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588491714] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:20:16,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 16:20:16,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-11-06 16:20:16,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104456269] [2021-11-06 16:20:16,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-06 16:20:16,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:20:16,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-06 16:20:16,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-06 16:20:16,188 INFO L87 Difference]: Start difference. First operand 3595 states and 4541 transitions. Second operand has 15 states, 15 states have (on average 13.6) internal successors, (204), 15 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:16,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:20:16,624 INFO L93 Difference]: Finished difference Result 7177 states and 9076 transitions. [2021-11-06 16:20:16,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-06 16:20:16,624 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 13.6) internal successors, (204), 15 states have internal predecessors, (204), 0 states have call successors, (0), 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 208 [2021-11-06 16:20:16,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:20:16,628 INFO L225 Difference]: With dead ends: 7177 [2021-11-06 16:20:16,628 INFO L226 Difference]: Without dead ends: 3607 [2021-11-06 16:20:16,632 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-06 16:20:16,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3607 states. [2021-11-06 16:20:16,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3607 to 3601. [2021-11-06 16:20:16,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3601 states, 3600 states have (on average 1.2630555555555556) internal successors, (4547), 3600 states have internal predecessors, (4547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:16,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3601 states to 3601 states and 4547 transitions. [2021-11-06 16:20:16,829 INFO L78 Accepts]: Start accepts. Automaton has 3601 states and 4547 transitions. Word has length 208 [2021-11-06 16:20:16,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:20:16,829 INFO L470 AbstractCegarLoop]: Abstraction has 3601 states and 4547 transitions. [2021-11-06 16:20:16,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 13.6) internal successors, (204), 15 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:16,829 INFO L276 IsEmpty]: Start isEmpty. Operand 3601 states and 4547 transitions. [2021-11-06 16:20:16,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-06 16:20:16,834 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:20:16,834 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:20:16,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-06 16:20:17,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 16:20:17,048 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:20:17,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:20:17,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1185156843, now seen corresponding path program 5 times [2021-11-06 16:20:17,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:20:17,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199870827] [2021-11-06 16:20:17,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:20:17,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:20:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:20:17,315 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-06 16:20:17,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:20:17,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199870827] [2021-11-06 16:20:17,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199870827] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:20:17,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311525888] [2021-11-06 16:20:17,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-06 16:20:17,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 16:20:17,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 16:20:17,317 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 16:20:17,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process Killed by 15