./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0218.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ae007674 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0218.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d0144744ce48339ff9171f70682ff014d707c8affcdd45929fe7382e980b7693 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 05:49:13,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 05:49:13,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 05:49:13,579 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 05:49:13,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 05:49:13,582 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 05:49:13,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 05:49:13,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 05:49:13,588 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 05:49:13,591 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 05:49:13,592 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 05:49:13,594 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 05:49:13,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 05:49:13,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 05:49:13,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 05:49:13,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 05:49:13,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 05:49:13,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 05:49:13,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 05:49:13,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 05:49:13,607 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 05:49:13,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 05:49:13,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 05:49:13,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 05:49:13,614 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 05:49:13,614 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 05:49:13,615 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 05:49:13,616 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 05:49:13,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 05:49:13,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 05:49:13,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 05:49:13,617 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 05:49:13,618 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 05:49:13,619 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 05:49:13,620 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 05:49:13,620 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 05:49:13,620 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 05:49:13,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 05:49:13,621 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 05:49:13,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 05:49:13,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 05:49:13,625 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-28 05:49:13,659 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 05:49:13,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 05:49:13,660 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 05:49:13,660 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 05:49:13,661 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 05:49:13,661 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 05:49:13,662 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 05:49:13,662 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 05:49:13,662 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 05:49:13,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 05:49:13,663 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 05:49:13,663 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-28 05:49:13,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 05:49:13,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 05:49:13,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 05:49:13,664 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-28 05:49:13,664 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-28 05:49:13,664 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-28 05:49:13,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 05:49:13,665 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-28 05:49:13,665 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 05:49:13,665 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 05:49:13,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 05:49:13,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 05:49:13,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 05:49:13,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 05:49:13,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 05:49:13,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 05:49:13,666 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 05:49:13,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 05:49:13,667 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0144744ce48339ff9171f70682ff014d707c8affcdd45929fe7382e980b7693 [2021-12-28 05:49:13,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 05:49:13,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 05:49:13,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 05:49:13,960 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 05:49:13,961 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 05:49:13,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0218.i [2021-12-28 05:49:14,031 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bd9edb77/3d098add50ca4d5dbacdbecc5340d6f8/FLAGcff9c7be6 [2021-12-28 05:49:14,459 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 05:49:14,460 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0218.i [2021-12-28 05:49:14,473 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bd9edb77/3d098add50ca4d5dbacdbecc5340d6f8/FLAGcff9c7be6 [2021-12-28 05:49:14,489 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bd9edb77/3d098add50ca4d5dbacdbecc5340d6f8 [2021-12-28 05:49:14,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 05:49:14,492 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 05:49:14,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 05:49:14,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 05:49:14,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 05:49:14,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:49:14" (1/1) ... [2021-12-28 05:49:14,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10bedde4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:49:14, skipping insertion in model container [2021-12-28 05:49:14,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:49:14" (1/1) ... [2021-12-28 05:49:14,503 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 05:49:14,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 05:49:14,849 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:49:14,858 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 05:49:14,898 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:49:14,929 INFO L208 MainTranslator]: Completed translation [2021-12-28 05:49:14,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:49:14 WrapperNode [2021-12-28 05:49:14,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 05:49:14,931 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 05:49:14,931 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 05:49:14,931 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 05:49:14,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:49:14" (1/1) ... [2021-12-28 05:49:14,957 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:49:14" (1/1) ... [2021-12-28 05:49:14,978 INFO L137 Inliner]: procedures = 181, calls = 46, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 216 [2021-12-28 05:49:14,979 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 05:49:14,979 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 05:49:14,980 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 05:49:14,980 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 05:49:14,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:49:14" (1/1) ... [2021-12-28 05:49:14,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:49:14" (1/1) ... [2021-12-28 05:49:14,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:49:14" (1/1) ... [2021-12-28 05:49:14,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:49:14" (1/1) ... [2021-12-28 05:49:14,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:49:14" (1/1) ... [2021-12-28 05:49:15,012 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:49:14" (1/1) ... [2021-12-28 05:49:15,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:49:14" (1/1) ... [2021-12-28 05:49:15,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 05:49:15,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 05:49:15,017 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 05:49:15,017 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 05:49:15,018 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:49:14" (1/1) ... [2021-12-28 05:49:15,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 05:49:15,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:49:15,041 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) [2021-12-28 05:49:15,080 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 [2021-12-28 05:49:15,085 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2021-12-28 05:49:15,086 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2021-12-28 05:49:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 05:49:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 05:49:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 05:49:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 05:49:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 05:49:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-28 05:49:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 05:49:15,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 05:49:15,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 05:49:15,186 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 05:49:15,187 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 05:49:15,564 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 05:49:15,571 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 05:49:15,572 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-28 05:49:15,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 05:49:15 BoogieIcfgContainer [2021-12-28 05:49:15,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 05:49:15,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 05:49:15,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 05:49:15,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 05:49:15,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 05:49:14" (1/3) ... [2021-12-28 05:49:15,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130cf973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 05:49:15, skipping insertion in model container [2021-12-28 05:49:15,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:49:14" (2/3) ... [2021-12-28 05:49:15,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130cf973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 05:49:15, skipping insertion in model container [2021-12-28 05:49:15,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 05:49:15" (3/3) ... [2021-12-28 05:49:15,579 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0218.i [2021-12-28 05:49:15,583 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 05:49:15,583 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 65 error locations. [2021-12-28 05:49:15,618 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 05:49:15,624 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-12-28 05:49:15,624 INFO L340 AbstractCegarLoop]: Starting to check reachability of 65 error locations. [2021-12-28 05:49:15,638 INFO L276 IsEmpty]: Start isEmpty. Operand has 167 states, 98 states have (on average 1.9387755102040816) internal successors, (190), 163 states have internal predecessors, (190), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 05:49:15,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-28 05:49:15,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:15,643 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-28 05:49:15,643 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:15,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:15,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1074826664, now seen corresponding path program 1 times [2021-12-28 05:49:15,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:15,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36564357] [2021-12-28 05:49:15,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:15,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:15,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:15,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:15,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36564357] [2021-12-28 05:49:15,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36564357] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:15,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:15,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:49:15,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550476558] [2021-12-28 05:49:15,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:15,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 05:49:15,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:15,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 05:49:15,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 05:49:15,780 INFO L87 Difference]: Start difference. First operand has 167 states, 98 states have (on average 1.9387755102040816) internal successors, (190), 163 states have internal predecessors, (190), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:49:15,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:15,821 INFO L93 Difference]: Finished difference Result 167 states and 188 transitions. [2021-12-28 05:49:15,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 05:49:15,823 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-12-28 05:49:15,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:15,831 INFO L225 Difference]: With dead ends: 167 [2021-12-28 05:49:15,832 INFO L226 Difference]: Without dead ends: 165 [2021-12-28 05:49:15,834 INFO L932 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 [2021-12-28 05:49:15,837 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:15,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:49:15,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-28 05:49:15,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-12-28 05:49:15,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 97 states have (on average 1.8762886597938144) internal successors, (182), 161 states have internal predecessors, (182), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 05:49:15,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 186 transitions. [2021-12-28 05:49:15,873 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 186 transitions. Word has length 6 [2021-12-28 05:49:15,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:15,876 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 186 transitions. [2021-12-28 05:49:15,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:49:15,877 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 186 transitions. [2021-12-28 05:49:15,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-28 05:49:15,877 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:15,877 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:15,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 05:49:15,878 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:15,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:15,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1280321240, now seen corresponding path program 1 times [2021-12-28 05:49:15,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:15,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372695679] [2021-12-28 05:49:15,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:15,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:15,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:15,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372695679] [2021-12-28 05:49:15,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372695679] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:15,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:15,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-28 05:49:15,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652561240] [2021-12-28 05:49:15,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:15,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 05:49:15,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:15,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 05:49:15,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:49:15,938 INFO L87 Difference]: Start difference. First operand 165 states and 186 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:49:16,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:16,103 INFO L93 Difference]: Finished difference Result 321 states and 362 transitions. [2021-12-28 05:49:16,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:49:16,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-12-28 05:49:16,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:16,106 INFO L225 Difference]: With dead ends: 321 [2021-12-28 05:49:16,106 INFO L226 Difference]: Without dead ends: 321 [2021-12-28 05:49:16,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:49:16,107 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 167 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:16,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 245 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:16,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-12-28 05:49:16,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 227. [2021-12-28 05:49:16,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 156 states have (on average 1.858974358974359) internal successors, (290), 220 states have internal predecessors, (290), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 05:49:16,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 298 transitions. [2021-12-28 05:49:16,139 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 298 transitions. Word has length 7 [2021-12-28 05:49:16,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:16,139 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 298 transitions. [2021-12-28 05:49:16,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:49:16,140 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 298 transitions. [2021-12-28 05:49:16,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-28 05:49:16,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:16,143 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:16,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 05:49:16,144 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr58REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:16,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:16,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1280321239, now seen corresponding path program 1 times [2021-12-28 05:49:16,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:16,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279798499] [2021-12-28 05:49:16,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:16,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:16,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:16,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:16,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279798499] [2021-12-28 05:49:16,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279798499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:16,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:16,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:49:16,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953442911] [2021-12-28 05:49:16,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:16,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:49:16,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:16,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:49:16,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:49:16,246 INFO L87 Difference]: Start difference. First operand 227 states and 298 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:49:16,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:16,346 INFO L93 Difference]: Finished difference Result 245 states and 316 transitions. [2021-12-28 05:49:16,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:49:16,347 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-12-28 05:49:16,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:16,348 INFO L225 Difference]: With dead ends: 245 [2021-12-28 05:49:16,348 INFO L226 Difference]: Without dead ends: 245 [2021-12-28 05:49:16,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:49:16,349 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 214 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:16,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 253 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:16,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-28 05:49:16,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 229. [2021-12-28 05:49:16,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 158 states have (on average 1.8544303797468353) internal successors, (293), 222 states have internal predecessors, (293), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 05:49:16,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 301 transitions. [2021-12-28 05:49:16,358 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 301 transitions. Word has length 7 [2021-12-28 05:49:16,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:16,358 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 301 transitions. [2021-12-28 05:49:16,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:49:16,359 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 301 transitions. [2021-12-28 05:49:16,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-28 05:49:16,359 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:16,359 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:16,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 05:49:16,360 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr58REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:16,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:16,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1280321301, now seen corresponding path program 1 times [2021-12-28 05:49:16,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:16,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640472308] [2021-12-28 05:49:16,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:16,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:16,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:16,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:16,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640472308] [2021-12-28 05:49:16,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640472308] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:16,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:16,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:49:16,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428674707] [2021-12-28 05:49:16,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:16,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:49:16,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:16,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:49:16,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:49:16,423 INFO L87 Difference]: Start difference. First operand 229 states and 301 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:49:16,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:16,530 INFO L93 Difference]: Finished difference Result 244 states and 314 transitions. [2021-12-28 05:49:16,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:49:16,530 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-12-28 05:49:16,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:16,531 INFO L225 Difference]: With dead ends: 244 [2021-12-28 05:49:16,531 INFO L226 Difference]: Without dead ends: 244 [2021-12-28 05:49:16,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:49:16,532 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 196 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:16,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 266 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:16,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-12-28 05:49:16,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 226. [2021-12-28 05:49:16,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 156 states have (on average 1.8461538461538463) internal successors, (288), 219 states have internal predecessors, (288), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 05:49:16,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 296 transitions. [2021-12-28 05:49:16,548 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 296 transitions. Word has length 7 [2021-12-28 05:49:16,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:16,548 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 296 transitions. [2021-12-28 05:49:16,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:49:16,549 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 296 transitions. [2021-12-28 05:49:16,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-28 05:49:16,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:16,549 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:16,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 05:49:16,550 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:16,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:16,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1554740496, now seen corresponding path program 1 times [2021-12-28 05:49:16,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:16,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137912017] [2021-12-28 05:49:16,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:16,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:16,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:16,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:16,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137912017] [2021-12-28 05:49:16,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137912017] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:16,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:16,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:49:16,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661311986] [2021-12-28 05:49:16,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:16,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:49:16,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:16,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:49:16,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:49:16,631 INFO L87 Difference]: Start difference. First operand 226 states and 296 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:49:16,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:16,757 INFO L93 Difference]: Finished difference Result 402 states and 517 transitions. [2021-12-28 05:49:16,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 05:49:16,757 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-12-28 05:49:16,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:16,759 INFO L225 Difference]: With dead ends: 402 [2021-12-28 05:49:16,759 INFO L226 Difference]: Without dead ends: 402 [2021-12-28 05:49:16,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-28 05:49:16,760 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 145 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:16,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 782 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:16,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-12-28 05:49:16,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 292. [2021-12-28 05:49:16,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 216 states have (on average 1.7916666666666667) internal successors, (387), 281 states have internal predecessors, (387), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-28 05:49:16,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 403 transitions. [2021-12-28 05:49:16,768 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 403 transitions. Word has length 10 [2021-12-28 05:49:16,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:16,769 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 403 transitions. [2021-12-28 05:49:16,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:49:16,769 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 403 transitions. [2021-12-28 05:49:16,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-28 05:49:16,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:16,770 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:16,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 05:49:16,770 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:16,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:16,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1552893454, now seen corresponding path program 1 times [2021-12-28 05:49:16,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:16,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943853896] [2021-12-28 05:49:16,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:16,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:16,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:16,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943853896] [2021-12-28 05:49:16,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943853896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:16,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:16,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:49:16,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879523114] [2021-12-28 05:49:16,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:16,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:49:16,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:16,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:49:16,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:49:16,852 INFO L87 Difference]: Start difference. First operand 292 states and 403 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:49:17,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:17,022 INFO L93 Difference]: Finished difference Result 392 states and 506 transitions. [2021-12-28 05:49:17,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 05:49:17,022 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-12-28 05:49:17,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:17,023 INFO L225 Difference]: With dead ends: 392 [2021-12-28 05:49:17,023 INFO L226 Difference]: Without dead ends: 392 [2021-12-28 05:49:17,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-28 05:49:17,024 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 131 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:17,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 791 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:17,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-12-28 05:49:17,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 292. [2021-12-28 05:49:17,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 216 states have (on average 1.7916666666666667) internal successors, (387), 281 states have internal predecessors, (387), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-28 05:49:17,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 403 transitions. [2021-12-28 05:49:17,031 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 403 transitions. Word has length 10 [2021-12-28 05:49:17,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:17,031 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 403 transitions. [2021-12-28 05:49:17,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:49:17,031 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 403 transitions. [2021-12-28 05:49:17,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-28 05:49:17,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:17,032 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:17,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 05:49:17,032 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:17,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:17,032 INFO L85 PathProgramCache]: Analyzing trace with hash 952313872, now seen corresponding path program 1 times [2021-12-28 05:49:17,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:17,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582205651] [2021-12-28 05:49:17,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:17,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:17,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:17,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582205651] [2021-12-28 05:49:17,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582205651] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:17,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:17,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:49:17,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275890113] [2021-12-28 05:49:17,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:17,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 05:49:17,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:17,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 05:49:17,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:49:17,050 INFO L87 Difference]: Start difference. First operand 292 states and 403 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:49:17,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:17,121 INFO L93 Difference]: Finished difference Result 347 states and 456 transitions. [2021-12-28 05:49:17,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:49:17,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-12-28 05:49:17,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:17,124 INFO L225 Difference]: With dead ends: 347 [2021-12-28 05:49:17,124 INFO L226 Difference]: Without dead ends: 340 [2021-12-28 05:49:17,125 INFO L932 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 [2021-12-28 05:49:17,125 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 70 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:17,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 279 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:17,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-12-28 05:49:17,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 289. [2021-12-28 05:49:17,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 213 states have (on average 1.7934272300469483) internal successors, (382), 278 states have internal predecessors, (382), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-28 05:49:17,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 398 transitions. [2021-12-28 05:49:17,131 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 398 transitions. Word has length 11 [2021-12-28 05:49:17,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:17,131 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 398 transitions. [2021-12-28 05:49:17,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:49:17,132 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 398 transitions. [2021-12-28 05:49:17,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-28 05:49:17,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:17,132 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:17,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 05:49:17,132 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:17,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:17,133 INFO L85 PathProgramCache]: Analyzing trace with hash -41167145, now seen corresponding path program 1 times [2021-12-28 05:49:17,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:17,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932736254] [2021-12-28 05:49:17,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:17,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:17,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:17,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:17,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932736254] [2021-12-28 05:49:17,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932736254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:17,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:17,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:49:17,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219472908] [2021-12-28 05:49:17,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:17,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:49:17,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:17,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:49:17,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:49:17,165 INFO L87 Difference]: Start difference. First operand 289 states and 398 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:17,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:17,332 INFO L93 Difference]: Finished difference Result 490 states and 599 transitions. [2021-12-28 05:49:17,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:49:17,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-28 05:49:17,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:17,339 INFO L225 Difference]: With dead ends: 490 [2021-12-28 05:49:17,339 INFO L226 Difference]: Without dead ends: 490 [2021-12-28 05:49:17,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:49:17,340 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 319 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:17,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 426 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:17,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-12-28 05:49:17,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 295. [2021-12-28 05:49:17,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 219 states have (on average 1.7716894977168949) internal successors, (388), 284 states have internal predecessors, (388), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-28 05:49:17,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 404 transitions. [2021-12-28 05:49:17,351 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 404 transitions. Word has length 15 [2021-12-28 05:49:17,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:17,351 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 404 transitions. [2021-12-28 05:49:17,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:17,352 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 404 transitions. [2021-12-28 05:49:17,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-28 05:49:17,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:17,353 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:17,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 05:49:17,355 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:17,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:17,356 INFO L85 PathProgramCache]: Analyzing trace with hash -41167144, now seen corresponding path program 1 times [2021-12-28 05:49:17,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:17,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005723205] [2021-12-28 05:49:17,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:17,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:17,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:17,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:17,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:17,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005723205] [2021-12-28 05:49:17,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005723205] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:17,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:17,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:49:17,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609310853] [2021-12-28 05:49:17,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:17,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:49:17,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:17,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:49:17,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:49:17,446 INFO L87 Difference]: Start difference. First operand 295 states and 404 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:17,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:17,563 INFO L93 Difference]: Finished difference Result 393 states and 512 transitions. [2021-12-28 05:49:17,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:49:17,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-28 05:49:17,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:17,566 INFO L225 Difference]: With dead ends: 393 [2021-12-28 05:49:17,566 INFO L226 Difference]: Without dead ends: 393 [2021-12-28 05:49:17,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:49:17,568 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 343 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:17,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 270 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:17,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-12-28 05:49:17,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 292. [2021-12-28 05:49:17,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 219 states have (on average 1.7168949771689497) internal successors, (376), 281 states have internal predecessors, (376), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-28 05:49:17,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 392 transitions. [2021-12-28 05:49:17,575 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 392 transitions. Word has length 15 [2021-12-28 05:49:17,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:17,575 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 392 transitions. [2021-12-28 05:49:17,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:17,576 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 392 transitions. [2021-12-28 05:49:17,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-28 05:49:17,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:17,576 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:17,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 05:49:17,577 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:17,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:17,580 INFO L85 PathProgramCache]: Analyzing trace with hash 85672930, now seen corresponding path program 1 times [2021-12-28 05:49:17,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:17,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641274819] [2021-12-28 05:49:17,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:17,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:17,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:17,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:17,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:17,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641274819] [2021-12-28 05:49:17,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641274819] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:17,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:17,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:49:17,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814510306] [2021-12-28 05:49:17,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:17,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 05:49:17,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:17,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 05:49:17,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:49:17,666 INFO L87 Difference]: Start difference. First operand 292 states and 392 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:17,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:17,926 INFO L93 Difference]: Finished difference Result 628 states and 735 transitions. [2021-12-28 05:49:17,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 05:49:17,926 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-28 05:49:17,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:17,928 INFO L225 Difference]: With dead ends: 628 [2021-12-28 05:49:17,928 INFO L226 Difference]: Without dead ends: 628 [2021-12-28 05:49:17,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:49:17,929 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 763 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:17,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 538 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:49:17,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-12-28 05:49:17,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 289. [2021-12-28 05:49:17,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 220 states have (on average 1.6818181818181819) internal successors, (370), 278 states have internal predecessors, (370), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-28 05:49:17,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 386 transitions. [2021-12-28 05:49:17,939 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 386 transitions. Word has length 17 [2021-12-28 05:49:17,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:17,939 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 386 transitions. [2021-12-28 05:49:17,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:17,940 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 386 transitions. [2021-12-28 05:49:17,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-28 05:49:17,941 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:17,941 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:17,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 05:49:17,942 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:17,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:17,942 INFO L85 PathProgramCache]: Analyzing trace with hash 85672931, now seen corresponding path program 1 times [2021-12-28 05:49:17,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:17,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815049080] [2021-12-28 05:49:17,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:17,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:18,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:18,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:18,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815049080] [2021-12-28 05:49:18,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815049080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:18,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:18,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:49:18,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21365990] [2021-12-28 05:49:18,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:18,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:49:18,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:18,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:49:18,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:49:18,045 INFO L87 Difference]: Start difference. First operand 289 states and 386 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:18,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:18,301 INFO L93 Difference]: Finished difference Result 594 states and 794 transitions. [2021-12-28 05:49:18,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 05:49:18,301 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-28 05:49:18,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:18,303 INFO L225 Difference]: With dead ends: 594 [2021-12-28 05:49:18,303 INFO L226 Difference]: Without dead ends: 594 [2021-12-28 05:49:18,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-12-28 05:49:18,304 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 538 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:18,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 698 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:49:18,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-12-28 05:49:18,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 351. [2021-12-28 05:49:18,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 278 states have (on average 1.6654676258992807) internal successors, (463), 338 states have internal predecessors, (463), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-28 05:49:18,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 487 transitions. [2021-12-28 05:49:18,315 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 487 transitions. Word has length 17 [2021-12-28 05:49:18,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:18,315 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 487 transitions. [2021-12-28 05:49:18,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:18,315 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 487 transitions. [2021-12-28 05:49:18,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-28 05:49:18,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:18,319 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:18,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 05:49:18,319 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:18,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:18,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1721781532, now seen corresponding path program 1 times [2021-12-28 05:49:18,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:18,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839794575] [2021-12-28 05:49:18,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:18,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:18,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:18,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:18,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:18,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:18,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839794575] [2021-12-28 05:49:18,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839794575] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:18,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:18,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 05:49:18,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667717675] [2021-12-28 05:49:18,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:18,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:49:18,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:18,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:49:18,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:49:18,388 INFO L87 Difference]: Start difference. First operand 351 states and 487 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:18,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:18,416 INFO L93 Difference]: Finished difference Result 559 states and 756 transitions. [2021-12-28 05:49:18,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 05:49:18,417 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-28 05:49:18,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:18,419 INFO L225 Difference]: With dead ends: 559 [2021-12-28 05:49:18,419 INFO L226 Difference]: Without dead ends: 559 [2021-12-28 05:49:18,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-28 05:49:18,420 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 231 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:18,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 1493 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:49:18,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-12-28 05:49:18,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 351. [2021-12-28 05:49:18,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 278 states have (on average 1.658273381294964) internal successors, (461), 338 states have internal predecessors, (461), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-28 05:49:18,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 485 transitions. [2021-12-28 05:49:18,427 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 485 transitions. Word has length 17 [2021-12-28 05:49:18,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:18,428 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 485 transitions. [2021-12-28 05:49:18,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:18,428 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 485 transitions. [2021-12-28 05:49:18,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-28 05:49:18,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:18,429 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:18,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 05:49:18,429 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:18,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:18,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1835564363, now seen corresponding path program 1 times [2021-12-28 05:49:18,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:18,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648530611] [2021-12-28 05:49:18,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:18,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:18,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:18,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:18,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:18,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648530611] [2021-12-28 05:49:18,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648530611] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:18,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:18,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:49:18,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300461533] [2021-12-28 05:49:18,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:18,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:49:18,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:18,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:49:18,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:49:18,525 INFO L87 Difference]: Start difference. First operand 351 states and 485 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:18,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:18,814 INFO L93 Difference]: Finished difference Result 635 states and 863 transitions. [2021-12-28 05:49:18,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 05:49:18,814 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-28 05:49:18,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:18,816 INFO L225 Difference]: With dead ends: 635 [2021-12-28 05:49:18,816 INFO L226 Difference]: Without dead ends: 635 [2021-12-28 05:49:18,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-12-28 05:49:18,817 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 450 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:18,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 836 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:49:18,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-12-28 05:49:18,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 346. [2021-12-28 05:49:18,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 273 states have (on average 1.6593406593406594) internal successors, (453), 333 states have internal predecessors, (453), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-28 05:49:18,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 477 transitions. [2021-12-28 05:49:18,825 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 477 transitions. Word has length 18 [2021-12-28 05:49:18,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:18,825 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 477 transitions. [2021-12-28 05:49:18,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:18,826 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 477 transitions. [2021-12-28 05:49:18,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-28 05:49:18,826 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:18,826 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:18,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 05:49:18,827 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:18,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:18,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1066754491, now seen corresponding path program 1 times [2021-12-28 05:49:18,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:18,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301687420] [2021-12-28 05:49:18,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:18,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:19,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:19,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:19,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:19,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:19,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301687420] [2021-12-28 05:49:19,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301687420] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:19,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:19,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 05:49:19,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888846595] [2021-12-28 05:49:19,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:19,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 05:49:19,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:19,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 05:49:19,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-28 05:49:19,049 INFO L87 Difference]: Start difference. First operand 346 states and 477 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:19,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:19,527 INFO L93 Difference]: Finished difference Result 712 states and 967 transitions. [2021-12-28 05:49:19,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 05:49:19,528 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-12-28 05:49:19,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:19,530 INFO L225 Difference]: With dead ends: 712 [2021-12-28 05:49:19,530 INFO L226 Difference]: Without dead ends: 710 [2021-12-28 05:49:19,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-12-28 05:49:19,531 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 518 mSDsluCounter, 1380 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:19,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 1628 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:49:19,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-12-28 05:49:19,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 340. [2021-12-28 05:49:19,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 267 states have (on average 1.655430711610487) internal successors, (442), 327 states have internal predecessors, (442), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-28 05:49:19,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 466 transitions. [2021-12-28 05:49:19,540 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 466 transitions. Word has length 21 [2021-12-28 05:49:19,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:19,541 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 466 transitions. [2021-12-28 05:49:19,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:19,541 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 466 transitions. [2021-12-28 05:49:19,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-28 05:49:19,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:19,541 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:19,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 05:49:19,542 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:19,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:19,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1136706200, now seen corresponding path program 1 times [2021-12-28 05:49:19,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:19,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215984945] [2021-12-28 05:49:19,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:19,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:19,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:19,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:19,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215984945] [2021-12-28 05:49:19,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215984945] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:19,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:19,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 05:49:19,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930771438] [2021-12-28 05:49:19,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:19,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 05:49:19,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:19,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 05:49:19,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-28 05:49:19,674 INFO L87 Difference]: Start difference. First operand 340 states and 466 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:19,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:19,899 INFO L93 Difference]: Finished difference Result 496 states and 644 transitions. [2021-12-28 05:49:19,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 05:49:19,900 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-12-28 05:49:19,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:19,901 INFO L225 Difference]: With dead ends: 496 [2021-12-28 05:49:19,901 INFO L226 Difference]: Without dead ends: 496 [2021-12-28 05:49:19,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-12-28 05:49:19,902 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 207 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:19,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 907 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:19,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-12-28 05:49:19,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 356. [2021-12-28 05:49:19,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 283 states have (on average 1.6289752650176679) internal successors, (461), 341 states have internal predecessors, (461), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-28 05:49:19,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 485 transitions. [2021-12-28 05:49:19,908 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 485 transitions. Word has length 21 [2021-12-28 05:49:19,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:19,908 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 485 transitions. [2021-12-28 05:49:19,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:19,908 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 485 transitions. [2021-12-28 05:49:19,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-28 05:49:19,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:19,908 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:19,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 05:49:19,908 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:19,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:19,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1088554597, now seen corresponding path program 1 times [2021-12-28 05:49:19,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:19,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506300130] [2021-12-28 05:49:19,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:19,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:19,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:19,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:19,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:19,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:19,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506300130] [2021-12-28 05:49:19,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506300130] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:19,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:19,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 05:49:19,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154394994] [2021-12-28 05:49:19,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:19,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:49:19,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:19,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:49:19,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:49:19,951 INFO L87 Difference]: Start difference. First operand 356 states and 485 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:19,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:19,978 INFO L93 Difference]: Finished difference Result 610 states and 833 transitions. [2021-12-28 05:49:19,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 05:49:19,979 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-12-28 05:49:19,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:19,981 INFO L225 Difference]: With dead ends: 610 [2021-12-28 05:49:19,981 INFO L226 Difference]: Without dead ends: 610 [2021-12-28 05:49:19,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-28 05:49:19,981 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 233 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:19,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 1199 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:49:19,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-12-28 05:49:19,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 358. [2021-12-28 05:49:19,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 285 states have (on average 1.6245614035087719) internal successors, (463), 343 states have internal predecessors, (463), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-28 05:49:19,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 487 transitions. [2021-12-28 05:49:19,989 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 487 transitions. Word has length 22 [2021-12-28 05:49:19,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:19,989 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 487 transitions. [2021-12-28 05:49:19,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:19,989 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 487 transitions. [2021-12-28 05:49:19,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-28 05:49:19,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:19,990 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:19,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 05:49:19,990 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:19,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:19,990 INFO L85 PathProgramCache]: Analyzing trace with hash 686452765, now seen corresponding path program 1 times [2021-12-28 05:49:19,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:19,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563399128] [2021-12-28 05:49:19,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:19,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:19,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:20,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:20,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:20,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563399128] [2021-12-28 05:49:20,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563399128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:20,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:20,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 05:49:20,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107013314] [2021-12-28 05:49:20,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:20,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:49:20,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:20,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:49:20,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:49:20,034 INFO L87 Difference]: Start difference. First operand 358 states and 487 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:20,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:20,062 INFO L93 Difference]: Finished difference Result 606 states and 825 transitions. [2021-12-28 05:49:20,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 05:49:20,063 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-12-28 05:49:20,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:20,065 INFO L225 Difference]: With dead ends: 606 [2021-12-28 05:49:20,065 INFO L226 Difference]: Without dead ends: 606 [2021-12-28 05:49:20,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-28 05:49:20,065 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 230 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:20,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 1215 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:49:20,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-12-28 05:49:20,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 356. [2021-12-28 05:49:20,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 283 states have (on average 1.6148409893992932) internal successors, (457), 341 states have internal predecessors, (457), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-28 05:49:20,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 481 transitions. [2021-12-28 05:49:20,072 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 481 transitions. Word has length 22 [2021-12-28 05:49:20,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:20,072 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 481 transitions. [2021-12-28 05:49:20,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:20,073 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 481 transitions. [2021-12-28 05:49:20,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-28 05:49:20,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:20,073 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:20,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 05:49:20,073 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:20,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:20,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1594113222, now seen corresponding path program 1 times [2021-12-28 05:49:20,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:20,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465726566] [2021-12-28 05:49:20,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:20,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:20,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:20,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:20,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:20,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465726566] [2021-12-28 05:49:20,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465726566] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:20,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:20,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 05:49:20,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382314524] [2021-12-28 05:49:20,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:20,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 05:49:20,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:20,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 05:49:20,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 05:49:20,158 INFO L87 Difference]: Start difference. First operand 356 states and 481 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:20,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:20,388 INFO L93 Difference]: Finished difference Result 540 states and 714 transitions. [2021-12-28 05:49:20,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 05:49:20,390 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-12-28 05:49:20,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:20,391 INFO L225 Difference]: With dead ends: 540 [2021-12-28 05:49:20,392 INFO L226 Difference]: Without dead ends: 540 [2021-12-28 05:49:20,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-28 05:49:20,392 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 191 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:20,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 1156 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:49:20,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-12-28 05:49:20,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 366. [2021-12-28 05:49:20,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 293 states have (on average 1.6006825938566553) internal successors, (469), 349 states have internal predecessors, (469), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-28 05:49:20,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 493 transitions. [2021-12-28 05:49:20,400 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 493 transitions. Word has length 22 [2021-12-28 05:49:20,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:20,401 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 493 transitions. [2021-12-28 05:49:20,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:20,401 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 493 transitions. [2021-12-28 05:49:20,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-28 05:49:20,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:20,401 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:20,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 05:49:20,402 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:20,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:20,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1338476602, now seen corresponding path program 1 times [2021-12-28 05:49:20,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:20,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233143358] [2021-12-28 05:49:20,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:20,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:20,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:20,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:20,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:20,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:20,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233143358] [2021-12-28 05:49:20,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233143358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:20,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:20,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:49:20,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415677723] [2021-12-28 05:49:20,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:20,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:49:20,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:20,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:49:20,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:49:20,433 INFO L87 Difference]: Start difference. First operand 366 states and 493 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:20,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:20,586 INFO L93 Difference]: Finished difference Result 583 states and 733 transitions. [2021-12-28 05:49:20,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:49:20,586 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-12-28 05:49:20,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:20,588 INFO L225 Difference]: With dead ends: 583 [2021-12-28 05:49:20,588 INFO L226 Difference]: Without dead ends: 583 [2021-12-28 05:49:20,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:49:20,589 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 287 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:20,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 425 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:20,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-12-28 05:49:20,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 384. [2021-12-28 05:49:20,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 311 states have (on average 1.617363344051447) internal successors, (503), 367 states have internal predecessors, (503), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-28 05:49:20,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 527 transitions. [2021-12-28 05:49:20,596 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 527 transitions. Word has length 23 [2021-12-28 05:49:20,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:20,596 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 527 transitions. [2021-12-28 05:49:20,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:20,596 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 527 transitions. [2021-12-28 05:49:20,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-28 05:49:20,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:20,597 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:20,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 05:49:20,597 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:20,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:20,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1338476601, now seen corresponding path program 1 times [2021-12-28 05:49:20,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:20,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257030848] [2021-12-28 05:49:20,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:20,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:20,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:20,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:20,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257030848] [2021-12-28 05:49:20,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257030848] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:20,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:20,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:49:20,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692751130] [2021-12-28 05:49:20,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:20,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:49:20,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:20,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:49:20,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:49:20,680 INFO L87 Difference]: Start difference. First operand 384 states and 527 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:20,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:20,858 INFO L93 Difference]: Finished difference Result 516 states and 688 transitions. [2021-12-28 05:49:20,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 05:49:20,859 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-12-28 05:49:20,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:20,860 INFO L225 Difference]: With dead ends: 516 [2021-12-28 05:49:20,860 INFO L226 Difference]: Without dead ends: 516 [2021-12-28 05:49:20,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-28 05:49:20,861 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 642 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:20,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 324 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:20,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-12-28 05:49:20,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 381. [2021-12-28 05:49:20,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 311 states have (on average 1.5787781350482315) internal successors, (491), 364 states have internal predecessors, (491), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-28 05:49:20,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 515 transitions. [2021-12-28 05:49:20,867 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 515 transitions. Word has length 23 [2021-12-28 05:49:20,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:20,868 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 515 transitions. [2021-12-28 05:49:20,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:20,868 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 515 transitions. [2021-12-28 05:49:20,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-28 05:49:20,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:20,868 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:20,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-28 05:49:20,868 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:20,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:20,869 INFO L85 PathProgramCache]: Analyzing trace with hash -740334691, now seen corresponding path program 1 times [2021-12-28 05:49:20,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:20,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125847696] [2021-12-28 05:49:20,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:20,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:20,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:20,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:20,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:20,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125847696] [2021-12-28 05:49:20,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125847696] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:20,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:20,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:49:20,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991809551] [2021-12-28 05:49:20,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:20,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:49:20,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:20,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:49:20,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:49:20,888 INFO L87 Difference]: Start difference. First operand 381 states and 515 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:20,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:20,901 INFO L93 Difference]: Finished difference Result 397 states and 531 transitions. [2021-12-28 05:49:20,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 05:49:20,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-28 05:49:20,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:20,903 INFO L225 Difference]: With dead ends: 397 [2021-12-28 05:49:20,903 INFO L226 Difference]: Without dead ends: 397 [2021-12-28 05:49:20,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:49:20,904 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 3 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:20,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 508 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:49:20,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-12-28 05:49:20,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 393. [2021-12-28 05:49:20,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 323 states have (on average 1.5572755417956656) internal successors, (503), 376 states have internal predecessors, (503), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-28 05:49:20,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 527 transitions. [2021-12-28 05:49:20,910 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 527 transitions. Word has length 25 [2021-12-28 05:49:20,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:20,910 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 527 transitions. [2021-12-28 05:49:20,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:20,910 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 527 transitions. [2021-12-28 05:49:20,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-28 05:49:20,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:20,911 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:20,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-28 05:49:20,911 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:20,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:20,911 INFO L85 PathProgramCache]: Analyzing trace with hash -738487649, now seen corresponding path program 1 times [2021-12-28 05:49:20,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:20,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683605111] [2021-12-28 05:49:20,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:20,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:20,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:20,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:20,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:20,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:20,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683605111] [2021-12-28 05:49:20,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683605111] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:20,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:20,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:49:20,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596529260] [2021-12-28 05:49:20,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:20,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:49:20,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:20,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:49:20,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:49:20,952 INFO L87 Difference]: Start difference. First operand 393 states and 527 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:21,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:21,082 INFO L93 Difference]: Finished difference Result 770 states and 1027 transitions. [2021-12-28 05:49:21,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:49:21,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-28 05:49:21,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:21,085 INFO L225 Difference]: With dead ends: 770 [2021-12-28 05:49:21,085 INFO L226 Difference]: Without dead ends: 770 [2021-12-28 05:49:21,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:49:21,086 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 319 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:21,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 522 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:21,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2021-12-28 05:49:21,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 469. [2021-12-28 05:49:21,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 399 states have (on average 1.5413533834586466) internal successors, (615), 452 states have internal predecessors, (615), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-28 05:49:21,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 639 transitions. [2021-12-28 05:49:21,093 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 639 transitions. Word has length 25 [2021-12-28 05:49:21,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:21,094 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 639 transitions. [2021-12-28 05:49:21,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:21,094 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 639 transitions. [2021-12-28 05:49:21,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-28 05:49:21,094 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:21,094 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:21,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-28 05:49:21,094 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:21,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:21,094 INFO L85 PathProgramCache]: Analyzing trace with hash -738487650, now seen corresponding path program 1 times [2021-12-28 05:49:21,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:21,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388925951] [2021-12-28 05:49:21,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:21,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:21,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:21,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:21,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388925951] [2021-12-28 05:49:21,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388925951] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:21,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:21,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:49:21,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269694461] [2021-12-28 05:49:21,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:21,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 05:49:21,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:21,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 05:49:21,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:49:21,113 INFO L87 Difference]: Start difference. First operand 469 states and 639 transitions. Second operand has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:21,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:21,189 INFO L93 Difference]: Finished difference Result 560 states and 741 transitions. [2021-12-28 05:49:21,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:49:21,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-28 05:49:21,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:21,191 INFO L225 Difference]: With dead ends: 560 [2021-12-28 05:49:21,191 INFO L226 Difference]: Without dead ends: 560 [2021-12-28 05:49:21,191 INFO L932 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 [2021-12-28 05:49:21,192 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 139 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:21,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 257 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:21,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-12-28 05:49:21,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 467. [2021-12-28 05:49:21,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 399 states have (on average 1.5112781954887218) internal successors, (603), 450 states have internal predecessors, (603), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-28 05:49:21,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 627 transitions. [2021-12-28 05:49:21,199 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 627 transitions. Word has length 25 [2021-12-28 05:49:21,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:21,199 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 627 transitions. [2021-12-28 05:49:21,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:21,199 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 627 transitions. [2021-12-28 05:49:21,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-28 05:49:21,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:21,200 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:21,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-28 05:49:21,200 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:21,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:21,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1484578673, now seen corresponding path program 1 times [2021-12-28 05:49:21,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:21,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452666704] [2021-12-28 05:49:21,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:21,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:21,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:21,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:21,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:21,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452666704] [2021-12-28 05:49:21,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452666704] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:21,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:21,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:49:21,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532689203] [2021-12-28 05:49:21,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:21,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:49:21,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:21,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:49:21,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:49:21,238 INFO L87 Difference]: Start difference. First operand 467 states and 627 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:21,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:21,362 INFO L93 Difference]: Finished difference Result 842 states and 1119 transitions. [2021-12-28 05:49:21,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:49:21,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-12-28 05:49:21,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:21,365 INFO L225 Difference]: With dead ends: 842 [2021-12-28 05:49:21,365 INFO L226 Difference]: Without dead ends: 842 [2021-12-28 05:49:21,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:49:21,366 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 305 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:21,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 532 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:21,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-12-28 05:49:21,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 467. [2021-12-28 05:49:21,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 399 states have (on average 1.5112781954887218) internal successors, (603), 450 states have internal predecessors, (603), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-28 05:49:21,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 627 transitions. [2021-12-28 05:49:21,374 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 627 transitions. Word has length 26 [2021-12-28 05:49:21,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:21,374 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 627 transitions. [2021-12-28 05:49:21,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:21,374 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 627 transitions. [2021-12-28 05:49:21,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-28 05:49:21,375 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:21,375 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:21,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-28 05:49:21,375 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:21,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:21,375 INFO L85 PathProgramCache]: Analyzing trace with hash -2109324045, now seen corresponding path program 1 times [2021-12-28 05:49:21,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:21,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046060957] [2021-12-28 05:49:21,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:21,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:21,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:21,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:21,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:21,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046060957] [2021-12-28 05:49:21,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046060957] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:21,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:21,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 05:49:21,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412775780] [2021-12-28 05:49:21,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:21,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:49:21,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:21,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:49:21,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:49:21,426 INFO L87 Difference]: Start difference. First operand 467 states and 627 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:21,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:21,452 INFO L93 Difference]: Finished difference Result 666 states and 882 transitions. [2021-12-28 05:49:21,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 05:49:21,453 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-12-28 05:49:21,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:21,454 INFO L225 Difference]: With dead ends: 666 [2021-12-28 05:49:21,455 INFO L226 Difference]: Without dead ends: 666 [2021-12-28 05:49:21,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-28 05:49:21,455 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 222 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1436 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:21,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 1436 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:49:21,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-12-28 05:49:21,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 390. [2021-12-28 05:49:21,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 323 states have (on average 1.5077399380804954) internal successors, (487), 373 states have internal predecessors, (487), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-28 05:49:21,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 511 transitions. [2021-12-28 05:49:21,462 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 511 transitions. Word has length 26 [2021-12-28 05:49:21,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:21,463 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 511 transitions. [2021-12-28 05:49:21,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:21,463 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 511 transitions. [2021-12-28 05:49:21,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-28 05:49:21,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:21,463 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:21,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-28 05:49:21,464 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:21,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:21,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1817784781, now seen corresponding path program 1 times [2021-12-28 05:49:21,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:21,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986681475] [2021-12-28 05:49:21,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:21,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:21,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:21,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:21,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:21,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:21,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986681475] [2021-12-28 05:49:21,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986681475] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:21,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:21,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:49:21,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722396771] [2021-12-28 05:49:21,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:21,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 05:49:21,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:21,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 05:49:21,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:49:21,509 INFO L87 Difference]: Start difference. First operand 390 states and 511 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:21,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:21,606 INFO L93 Difference]: Finished difference Result 472 states and 596 transitions. [2021-12-28 05:49:21,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 05:49:21,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-12-28 05:49:21,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:21,608 INFO L225 Difference]: With dead ends: 472 [2021-12-28 05:49:21,608 INFO L226 Difference]: Without dead ends: 472 [2021-12-28 05:49:21,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:49:21,608 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 163 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:21,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 626 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:21,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-12-28 05:49:21,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 390. [2021-12-28 05:49:21,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 323 states have (on average 1.5046439628482973) internal successors, (486), 373 states have internal predecessors, (486), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-28 05:49:21,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 510 transitions. [2021-12-28 05:49:21,616 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 510 transitions. Word has length 27 [2021-12-28 05:49:21,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:21,616 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 510 transitions. [2021-12-28 05:49:21,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:21,616 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 510 transitions. [2021-12-28 05:49:21,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-28 05:49:21,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:21,617 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:21,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-28 05:49:21,617 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:21,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:21,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1017025601, now seen corresponding path program 1 times [2021-12-28 05:49:21,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:21,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396428757] [2021-12-28 05:49:21,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:21,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:21,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:21,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:21,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:21,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396428757] [2021-12-28 05:49:21,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396428757] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:21,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:21,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 05:49:21,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812968341] [2021-12-28 05:49:21,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:21,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 05:49:21,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:21,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 05:49:21,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:49:21,674 INFO L87 Difference]: Start difference. First operand 390 states and 510 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:21,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:21,804 INFO L93 Difference]: Finished difference Result 589 states and 763 transitions. [2021-12-28 05:49:21,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 05:49:21,805 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-12-28 05:49:21,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:21,806 INFO L225 Difference]: With dead ends: 589 [2021-12-28 05:49:21,806 INFO L226 Difference]: Without dead ends: 589 [2021-12-28 05:49:21,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-28 05:49:21,807 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 149 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:21,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 1213 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:21,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-12-28 05:49:21,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 422. [2021-12-28 05:49:21,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 355 states have (on average 1.476056338028169) internal successors, (524), 405 states have internal predecessors, (524), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-28 05:49:21,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 548 transitions. [2021-12-28 05:49:21,814 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 548 transitions. Word has length 27 [2021-12-28 05:49:21,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:21,814 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 548 transitions. [2021-12-28 05:49:21,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:21,814 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 548 transitions. [2021-12-28 05:49:21,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-28 05:49:21,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:21,815 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:21,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-28 05:49:21,815 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:21,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:21,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1017025407, now seen corresponding path program 1 times [2021-12-28 05:49:21,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:21,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682663892] [2021-12-28 05:49:21,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:21,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:21,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:21,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:21,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:21,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:21,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682663892] [2021-12-28 05:49:21,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682663892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:21,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:21,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:49:21,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840569381] [2021-12-28 05:49:21,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:21,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 05:49:21,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:21,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 05:49:21,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:49:21,862 INFO L87 Difference]: Start difference. First operand 422 states and 548 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:21,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:21,993 INFO L93 Difference]: Finished difference Result 828 states and 1070 transitions. [2021-12-28 05:49:21,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 05:49:21,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-12-28 05:49:21,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:21,995 INFO L225 Difference]: With dead ends: 828 [2021-12-28 05:49:21,995 INFO L226 Difference]: Without dead ends: 828 [2021-12-28 05:49:21,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:49:21,996 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 440 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:21,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 731 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:21,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-12-28 05:49:22,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 538. [2021-12-28 05:49:22,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 471 states have (on average 1.4564755838641188) internal successors, (686), 521 states have internal predecessors, (686), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-28 05:49:22,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 710 transitions. [2021-12-28 05:49:22,004 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 710 transitions. Word has length 27 [2021-12-28 05:49:22,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:22,004 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 710 transitions. [2021-12-28 05:49:22,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:22,005 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 710 transitions. [2021-12-28 05:49:22,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-28 05:49:22,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:22,005 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:22,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-28 05:49:22,006 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:22,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:22,006 INFO L85 PathProgramCache]: Analyzing trace with hash 516753601, now seen corresponding path program 1 times [2021-12-28 05:49:22,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:22,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722458287] [2021-12-28 05:49:22,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:22,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:22,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:22,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:22,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:22,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722458287] [2021-12-28 05:49:22,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722458287] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:22,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:22,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:49:22,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579036546] [2021-12-28 05:49:22,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:22,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 05:49:22,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:22,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 05:49:22,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:49:22,067 INFO L87 Difference]: Start difference. First operand 538 states and 710 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:22,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:22,196 INFO L93 Difference]: Finished difference Result 783 states and 1007 transitions. [2021-12-28 05:49:22,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 05:49:22,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-12-28 05:49:22,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:22,199 INFO L225 Difference]: With dead ends: 783 [2021-12-28 05:49:22,199 INFO L226 Difference]: Without dead ends: 783 [2021-12-28 05:49:22,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:49:22,199 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 218 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:22,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 635 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:22,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-12-28 05:49:22,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 576. [2021-12-28 05:49:22,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 505 states have (on average 1.4574257425742574) internal successors, (736), 557 states have internal predecessors, (736), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-28 05:49:22,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 766 transitions. [2021-12-28 05:49:22,208 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 766 transitions. Word has length 28 [2021-12-28 05:49:22,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:22,208 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 766 transitions. [2021-12-28 05:49:22,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:22,208 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 766 transitions. [2021-12-28 05:49:22,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-28 05:49:22,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:22,209 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:22,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-28 05:49:22,209 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:22,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:22,209 INFO L85 PathProgramCache]: Analyzing trace with hash 750963923, now seen corresponding path program 1 times [2021-12-28 05:49:22,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:22,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523072389] [2021-12-28 05:49:22,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:22,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:22,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:22,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:22,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523072389] [2021-12-28 05:49:22,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523072389] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:22,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:22,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:49:22,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072328452] [2021-12-28 05:49:22,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:22,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:49:22,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:22,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:49:22,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:49:22,246 INFO L87 Difference]: Start difference. First operand 576 states and 766 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:22,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:22,360 INFO L93 Difference]: Finished difference Result 865 states and 1118 transitions. [2021-12-28 05:49:22,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:49:22,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-12-28 05:49:22,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:22,362 INFO L225 Difference]: With dead ends: 865 [2021-12-28 05:49:22,363 INFO L226 Difference]: Without dead ends: 865 [2021-12-28 05:49:22,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:49:22,363 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 302 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:22,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 509 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:22,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-12-28 05:49:22,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 459. [2021-12-28 05:49:22,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 389 states have (on average 1.455012853470437) internal successors, (566), 440 states have internal predecessors, (566), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-28 05:49:22,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 596 transitions. [2021-12-28 05:49:22,371 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 596 transitions. Word has length 28 [2021-12-28 05:49:22,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:22,371 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 596 transitions. [2021-12-28 05:49:22,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:22,371 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 596 transitions. [2021-12-28 05:49:22,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-28 05:49:22,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:22,372 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:22,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-28 05:49:22,372 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:22,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:22,372 INFO L85 PathProgramCache]: Analyzing trace with hash -933658936, now seen corresponding path program 1 times [2021-12-28 05:49:22,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:22,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135794900] [2021-12-28 05:49:22,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:22,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:22,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:22,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:22,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:22,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135794900] [2021-12-28 05:49:22,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135794900] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:22,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:22,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:49:22,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295228933] [2021-12-28 05:49:22,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:22,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 05:49:22,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:22,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 05:49:22,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:49:22,411 INFO L87 Difference]: Start difference. First operand 459 states and 596 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:22,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:22,438 INFO L93 Difference]: Finished difference Result 929 states and 1212 transitions. [2021-12-28 05:49:22,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 05:49:22,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-28 05:49:22,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:22,441 INFO L225 Difference]: With dead ends: 929 [2021-12-28 05:49:22,441 INFO L226 Difference]: Without dead ends: 929 [2021-12-28 05:49:22,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:49:22,441 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 232 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:22,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 938 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:49:22,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-12-28 05:49:22,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 534. [2021-12-28 05:49:22,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 464 states have (on average 1.4504310344827587) internal successors, (673), 510 states have internal predecessors, (673), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 18 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-28 05:49:22,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 703 transitions. [2021-12-28 05:49:22,449 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 703 transitions. Word has length 30 [2021-12-28 05:49:22,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:22,449 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 703 transitions. [2021-12-28 05:49:22,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:22,450 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 703 transitions. [2021-12-28 05:49:22,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-28 05:49:22,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:22,450 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:22,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-28 05:49:22,450 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:22,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:22,451 INFO L85 PathProgramCache]: Analyzing trace with hash -933657014, now seen corresponding path program 1 times [2021-12-28 05:49:22,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:22,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130379527] [2021-12-28 05:49:22,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:22,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:22,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:22,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:22,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:22,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130379527] [2021-12-28 05:49:22,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130379527] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:22,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:22,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 05:49:22,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320165402] [2021-12-28 05:49:22,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:22,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 05:49:22,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:22,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 05:49:22,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:49:22,523 INFO L87 Difference]: Start difference. First operand 534 states and 703 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:22,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:22,738 INFO L93 Difference]: Finished difference Result 1132 states and 1464 transitions. [2021-12-28 05:49:22,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 05:49:22,739 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-28 05:49:22,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:22,742 INFO L225 Difference]: With dead ends: 1132 [2021-12-28 05:49:22,742 INFO L226 Difference]: Without dead ends: 1132 [2021-12-28 05:49:22,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-28 05:49:22,743 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 501 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:22,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [505 Valid, 1638 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:49:22,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2021-12-28 05:49:22,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 552. [2021-12-28 05:49:22,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 482 states have (on average 1.450207468879668) internal successors, (699), 528 states have internal predecessors, (699), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 18 states have call predecessors, (20), 10 states have call successors, (20) [2021-12-28 05:49:22,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 729 transitions. [2021-12-28 05:49:22,752 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 729 transitions. Word has length 30 [2021-12-28 05:49:22,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:22,752 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 729 transitions. [2021-12-28 05:49:22,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:22,753 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 729 transitions. [2021-12-28 05:49:22,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-28 05:49:22,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:22,753 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:22,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-28 05:49:22,753 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:22,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:22,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1615988093, now seen corresponding path program 1 times [2021-12-28 05:49:22,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:22,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734388503] [2021-12-28 05:49:22,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:22,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:22,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:22,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:22,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734388503] [2021-12-28 05:49:22,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734388503] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:22,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:22,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:49:22,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34930732] [2021-12-28 05:49:22,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:22,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:49:22,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:22,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:49:22,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:49:22,832 INFO L87 Difference]: Start difference. First operand 552 states and 729 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:23,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:23,209 INFO L93 Difference]: Finished difference Result 1036 states and 1327 transitions. [2021-12-28 05:49:23,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 05:49:23,209 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-28 05:49:23,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:23,212 INFO L225 Difference]: With dead ends: 1036 [2021-12-28 05:49:23,212 INFO L226 Difference]: Without dead ends: 1036 [2021-12-28 05:49:23,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-12-28 05:49:23,212 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 461 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:23,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 994 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:49:23,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-12-28 05:49:23,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 592. [2021-12-28 05:49:23,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 518 states have (on average 1.4343629343629343) internal successors, (743), 565 states have internal predecessors, (743), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 20 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-28 05:49:23,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 779 transitions. [2021-12-28 05:49:23,221 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 779 transitions. Word has length 30 [2021-12-28 05:49:23,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:23,221 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 779 transitions. [2021-12-28 05:49:23,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:23,221 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 779 transitions. [2021-12-28 05:49:23,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-28 05:49:23,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:23,222 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:23,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-28 05:49:23,222 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:23,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:23,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1342481239, now seen corresponding path program 1 times [2021-12-28 05:49:23,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:23,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667553786] [2021-12-28 05:49:23,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:23,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:23,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:23,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:23,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:23,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667553786] [2021-12-28 05:49:23,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667553786] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:23,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:23,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:49:23,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359534512] [2021-12-28 05:49:23,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:23,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 05:49:23,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:23,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 05:49:23,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:49:23,262 INFO L87 Difference]: Start difference. First operand 592 states and 779 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:23,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:23,290 INFO L93 Difference]: Finished difference Result 952 states and 1240 transitions. [2021-12-28 05:49:23,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 05:49:23,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-28 05:49:23,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:23,293 INFO L225 Difference]: With dead ends: 952 [2021-12-28 05:49:23,293 INFO L226 Difference]: Without dead ends: 952 [2021-12-28 05:49:23,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:49:23,294 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 211 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:23,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1081 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:49:23,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-12-28 05:49:23,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 588. [2021-12-28 05:49:23,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 514 states have (on average 1.433852140077821) internal successors, (737), 561 states have internal predecessors, (737), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 20 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-28 05:49:23,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 773 transitions. [2021-12-28 05:49:23,301 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 773 transitions. Word has length 30 [2021-12-28 05:49:23,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:23,302 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 773 transitions. [2021-12-28 05:49:23,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:23,302 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 773 transitions. [2021-12-28 05:49:23,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-28 05:49:23,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:23,302 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:23,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-28 05:49:23,302 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:23,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:23,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1340636119, now seen corresponding path program 1 times [2021-12-28 05:49:23,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:23,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532529014] [2021-12-28 05:49:23,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:23,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:23,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:23,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:23,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:23,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:23,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532529014] [2021-12-28 05:49:23,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532529014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:23,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:23,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 05:49:23,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485516254] [2021-12-28 05:49:23,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:23,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 05:49:23,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:23,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 05:49:23,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:49:23,363 INFO L87 Difference]: Start difference. First operand 588 states and 773 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:23,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:23,543 INFO L93 Difference]: Finished difference Result 1169 states and 1513 transitions. [2021-12-28 05:49:23,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 05:49:23,544 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-28 05:49:23,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:23,546 INFO L225 Difference]: With dead ends: 1169 [2021-12-28 05:49:23,546 INFO L226 Difference]: Without dead ends: 1169 [2021-12-28 05:49:23,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-28 05:49:23,547 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 501 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:23,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 1667 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:23,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-12-28 05:49:23,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 572. [2021-12-28 05:49:23,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 500 states have (on average 1.414) internal successors, (707), 545 states have internal predecessors, (707), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 20 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-28 05:49:23,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 743 transitions. [2021-12-28 05:49:23,554 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 743 transitions. Word has length 30 [2021-12-28 05:49:23,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:23,555 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 743 transitions. [2021-12-28 05:49:23,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:23,555 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 743 transitions. [2021-12-28 05:49:23,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-28 05:49:23,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:23,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:23,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-28 05:49:23,556 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr45ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:23,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:23,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1443976913, now seen corresponding path program 1 times [2021-12-28 05:49:23,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:23,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250759729] [2021-12-28 05:49:23,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:23,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:23,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:23,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:23,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:23,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250759729] [2021-12-28 05:49:23,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250759729] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:23,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:23,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 05:49:23,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377679504] [2021-12-28 05:49:23,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:23,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 05:49:23,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:23,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 05:49:23,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:49:23,647 INFO L87 Difference]: Start difference. First operand 572 states and 743 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:23,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:23,957 INFO L93 Difference]: Finished difference Result 953 states and 1201 transitions. [2021-12-28 05:49:23,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 05:49:23,958 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-12-28 05:49:23,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:23,960 INFO L225 Difference]: With dead ends: 953 [2021-12-28 05:49:23,960 INFO L226 Difference]: Without dead ends: 953 [2021-12-28 05:49:23,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-28 05:49:23,961 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 742 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:23,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [742 Valid, 603 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:49:23,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-12-28 05:49:23,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 571. [2021-12-28 05:49:23,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 500 states have (on average 1.406) internal successors, (703), 544 states have internal predecessors, (703), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 20 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-28 05:49:23,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 739 transitions. [2021-12-28 05:49:23,970 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 739 transitions. Word has length 31 [2021-12-28 05:49:23,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:23,970 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 739 transitions. [2021-12-28 05:49:23,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:23,971 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 739 transitions. [2021-12-28 05:49:23,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-28 05:49:23,971 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:23,971 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:23,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-28 05:49:23,971 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr48REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:23,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:23,972 INFO L85 PathProgramCache]: Analyzing trace with hash 403780234, now seen corresponding path program 1 times [2021-12-28 05:49:23,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:23,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550063870] [2021-12-28 05:49:23,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:23,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:24,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:24,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:24,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550063870] [2021-12-28 05:49:24,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550063870] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:24,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:24,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 05:49:24,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698816585] [2021-12-28 05:49:24,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:24,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:49:24,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:24,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:49:24,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:49:24,125 INFO L87 Difference]: Start difference. First operand 571 states and 739 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:24,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:24,294 INFO L93 Difference]: Finished difference Result 618 states and 786 transitions. [2021-12-28 05:49:24,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 05:49:24,294 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-12-28 05:49:24,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:24,296 INFO L225 Difference]: With dead ends: 618 [2021-12-28 05:49:24,296 INFO L226 Difference]: Without dead ends: 618 [2021-12-28 05:49:24,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-28 05:49:24,296 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 106 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:24,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 794 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:24,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-12-28 05:49:24,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 550. [2021-12-28 05:49:24,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 479 states have (on average 1.4112734864300627) internal successors, (676), 525 states have internal predecessors, (676), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-28 05:49:24,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 712 transitions. [2021-12-28 05:49:24,306 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 712 transitions. Word has length 32 [2021-12-28 05:49:24,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:24,306 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 712 transitions. [2021-12-28 05:49:24,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:24,306 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 712 transitions. [2021-12-28 05:49:24,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-28 05:49:24,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:24,307 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:24,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-28 05:49:24,307 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:24,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:24,308 INFO L85 PathProgramCache]: Analyzing trace with hash 407119085, now seen corresponding path program 1 times [2021-12-28 05:49:24,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:24,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473728973] [2021-12-28 05:49:24,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:24,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:24,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:24,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:24,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:24,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:24,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473728973] [2021-12-28 05:49:24,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473728973] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:24,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:24,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:49:24,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134216992] [2021-12-28 05:49:24,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:24,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 05:49:24,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:24,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 05:49:24,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:49:24,372 INFO L87 Difference]: Start difference. First operand 550 states and 712 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:24,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:24,483 INFO L93 Difference]: Finished difference Result 669 states and 856 transitions. [2021-12-28 05:49:24,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 05:49:24,484 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-12-28 05:49:24,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:24,486 INFO L225 Difference]: With dead ends: 669 [2021-12-28 05:49:24,486 INFO L226 Difference]: Without dead ends: 669 [2021-12-28 05:49:24,486 INFO L932 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 [2021-12-28 05:49:24,486 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 354 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:24,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 508 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:24,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-12-28 05:49:24,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 549. [2021-12-28 05:49:24,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 479 states have (on average 1.407098121085595) internal successors, (674), 524 states have internal predecessors, (674), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-28 05:49:24,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 710 transitions. [2021-12-28 05:49:24,493 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 710 transitions. Word has length 33 [2021-12-28 05:49:24,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:24,493 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 710 transitions. [2021-12-28 05:49:24,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:24,494 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 710 transitions. [2021-12-28 05:49:24,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-28 05:49:24,494 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:24,494 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:24,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-28 05:49:24,494 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:24,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:24,496 INFO L85 PathProgramCache]: Analyzing trace with hash 407119084, now seen corresponding path program 1 times [2021-12-28 05:49:24,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:24,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144809200] [2021-12-28 05:49:24,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:24,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:24,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:24,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:24,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:24,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144809200] [2021-12-28 05:49:24,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144809200] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:24,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:24,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:49:24,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546661481] [2021-12-28 05:49:24,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:24,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 05:49:24,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:24,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 05:49:24,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:49:24,530 INFO L87 Difference]: Start difference. First operand 549 states and 710 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:24,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:24,642 INFO L93 Difference]: Finished difference Result 663 states and 848 transitions. [2021-12-28 05:49:24,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 05:49:24,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-12-28 05:49:24,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:24,650 INFO L225 Difference]: With dead ends: 663 [2021-12-28 05:49:24,650 INFO L226 Difference]: Without dead ends: 663 [2021-12-28 05:49:24,650 INFO L932 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 [2021-12-28 05:49:24,650 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 333 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:24,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 438 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:24,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-12-28 05:49:24,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 548. [2021-12-28 05:49:24,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 479 states have (on average 1.4029227557411275) internal successors, (672), 523 states have internal predecessors, (672), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-28 05:49:24,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 708 transitions. [2021-12-28 05:49:24,657 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 708 transitions. Word has length 33 [2021-12-28 05:49:24,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:24,657 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 708 transitions. [2021-12-28 05:49:24,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:24,657 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 708 transitions. [2021-12-28 05:49:24,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-28 05:49:24,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:24,658 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:24,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-28 05:49:24,658 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:24,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:24,658 INFO L85 PathProgramCache]: Analyzing trace with hash 399419021, now seen corresponding path program 1 times [2021-12-28 05:49:24,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:24,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988240004] [2021-12-28 05:49:24,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:24,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:24,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:24,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:24,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:24,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988240004] [2021-12-28 05:49:24,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988240004] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:24,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:24,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:49:24,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267134089] [2021-12-28 05:49:24,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:24,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 05:49:24,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:24,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 05:49:24,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:49:24,693 INFO L87 Difference]: Start difference. First operand 548 states and 708 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:24,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:24,850 INFO L93 Difference]: Finished difference Result 951 states and 1194 transitions. [2021-12-28 05:49:24,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 05:49:24,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-12-28 05:49:24,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:24,852 INFO L225 Difference]: With dead ends: 951 [2021-12-28 05:49:24,853 INFO L226 Difference]: Without dead ends: 951 [2021-12-28 05:49:24,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:49:24,853 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 473 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:24,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 582 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:24,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-12-28 05:49:24,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 545. [2021-12-28 05:49:24,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 479 states have (on average 1.3903966597077244) internal successors, (666), 520 states have internal predecessors, (666), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-28 05:49:24,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 702 transitions. [2021-12-28 05:49:24,860 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 702 transitions. Word has length 35 [2021-12-28 05:49:24,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:24,860 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 702 transitions. [2021-12-28 05:49:24,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:24,861 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 702 transitions. [2021-12-28 05:49:24,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-28 05:49:24,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:24,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:24,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-28 05:49:24,861 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:24,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:24,862 INFO L85 PathProgramCache]: Analyzing trace with hash 399419022, now seen corresponding path program 1 times [2021-12-28 05:49:24,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:24,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593183568] [2021-12-28 05:49:24,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:24,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:24,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:24,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:24,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:24,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:24,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593183568] [2021-12-28 05:49:24,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593183568] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:24,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:24,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:49:24,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955955424] [2021-12-28 05:49:24,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:24,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:49:24,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:24,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:49:24,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:49:24,932 INFO L87 Difference]: Start difference. First operand 545 states and 702 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:25,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:25,076 INFO L93 Difference]: Finished difference Result 855 states and 1077 transitions. [2021-12-28 05:49:25,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 05:49:25,076 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-12-28 05:49:25,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:25,078 INFO L225 Difference]: With dead ends: 855 [2021-12-28 05:49:25,078 INFO L226 Difference]: Without dead ends: 855 [2021-12-28 05:49:25,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-28 05:49:25,079 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 715 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:25,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 607 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:25,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-12-28 05:49:25,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 544. [2021-12-28 05:49:25,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 479 states have (on average 1.3862212943632568) internal successors, (664), 519 states have internal predecessors, (664), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-28 05:49:25,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 700 transitions. [2021-12-28 05:49:25,086 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 700 transitions. Word has length 35 [2021-12-28 05:49:25,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:25,086 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 700 transitions. [2021-12-28 05:49:25,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:25,086 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 700 transitions. [2021-12-28 05:49:25,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-28 05:49:25,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:25,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:25,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-28 05:49:25,087 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:25,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:25,087 INFO L85 PathProgramCache]: Analyzing trace with hash 399419183, now seen corresponding path program 1 times [2021-12-28 05:49:25,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:25,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170798340] [2021-12-28 05:49:25,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:25,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:25,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:25,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:25,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:25,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170798340] [2021-12-28 05:49:25,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170798340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:25,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:25,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:49:25,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797149287] [2021-12-28 05:49:25,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:25,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:49:25,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:25,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:49:25,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:49:25,148 INFO L87 Difference]: Start difference. First operand 544 states and 700 transitions. Second operand has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:25,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:25,219 INFO L93 Difference]: Finished difference Result 662 states and 842 transitions. [2021-12-28 05:49:25,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:49:25,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-12-28 05:49:25,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:25,228 INFO L225 Difference]: With dead ends: 662 [2021-12-28 05:49:25,228 INFO L226 Difference]: Without dead ends: 662 [2021-12-28 05:49:25,228 INFO L932 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 [2021-12-28 05:49:25,229 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 298 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:25,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 259 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:25,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-12-28 05:49:25,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 542. [2021-12-28 05:49:25,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 479 states have (on average 1.3778705636743216) internal successors, (660), 517 states have internal predecessors, (660), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 18 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-28 05:49:25,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 696 transitions. [2021-12-28 05:49:25,236 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 696 transitions. Word has length 35 [2021-12-28 05:49:25,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:25,236 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 696 transitions. [2021-12-28 05:49:25,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:25,236 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 696 transitions. [2021-12-28 05:49:25,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-28 05:49:25,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:25,237 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 05:49:25,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-28 05:49:25,237 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:25,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:25,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1620073746, now seen corresponding path program 1 times [2021-12-28 05:49:25,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:25,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289110172] [2021-12-28 05:49:25,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:25,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:25,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:25,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:25,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-28 05:49:25,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:25,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 05:49:25,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:25,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289110172] [2021-12-28 05:49:25,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289110172] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:49:25,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495729163] [2021-12-28 05:49:25,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:25,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:25,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:49:25,288 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) [2021-12-28 05:49:25,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 05:49:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:25,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-28 05:49:25,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:49:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:25,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:49:25,687 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-28 05:49:25,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-12-28 05:49:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 05:49:25,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495729163] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:49:25,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:49:25,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-12-28 05:49:25,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408793372] [2021-12-28 05:49:25,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:49:25,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 05:49:25,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:25,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 05:49:25,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-28 05:49:25,738 INFO L87 Difference]: Start difference. First operand 542 states and 696 transitions. Second operand has 12 states, 11 states have (on average 7.181818181818182) internal successors, (79), 12 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 05:49:26,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:26,199 INFO L93 Difference]: Finished difference Result 1745 states and 2122 transitions. [2021-12-28 05:49:26,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 05:49:26,199 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.181818181818182) internal successors, (79), 12 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2021-12-28 05:49:26,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:26,202 INFO L225 Difference]: With dead ends: 1745 [2021-12-28 05:49:26,202 INFO L226 Difference]: Without dead ends: 1745 [2021-12-28 05:49:26,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-12-28 05:49:26,202 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 2957 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2959 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:26,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2959 Valid, 914 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:49:26,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1745 states. [2021-12-28 05:49:26,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1745 to 664. [2021-12-28 05:49:26,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 599 states have (on average 1.332220367278798) internal successors, (798), 631 states have internal predecessors, (798), 16 states have call successors, (16), 8 states have call predecessors, (16), 16 states have return successors, (32), 24 states have call predecessors, (32), 16 states have call successors, (32) [2021-12-28 05:49:26,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 846 transitions. [2021-12-28 05:49:26,213 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 846 transitions. Word has length 43 [2021-12-28 05:49:26,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:26,214 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 846 transitions. [2021-12-28 05:49:26,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.181818181818182) internal successors, (79), 12 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 05:49:26,214 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 846 transitions. [2021-12-28 05:49:26,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 05:49:26,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:26,215 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:26,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-28 05:49:26,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-12-28 05:49:26,432 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:26,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:26,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1803853866, now seen corresponding path program 1 times [2021-12-28 05:49:26,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:26,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551712744] [2021-12-28 05:49:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:26,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:26,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:26,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 05:49:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:26,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:26,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551712744] [2021-12-28 05:49:26,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551712744] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:49:26,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205759193] [2021-12-28 05:49:26,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:26,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:26,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:49:26,484 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) [2021-12-28 05:49:26,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 05:49:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:26,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-28 05:49:26,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:49:26,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:49:26,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-28 05:49:26,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:49:26,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-28 05:49:26,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:49:26,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:49:26,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205759193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:26,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 05:49:26,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2021-12-28 05:49:26,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645733545] [2021-12-28 05:49:26,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:26,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 05:49:26,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:26,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 05:49:26,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-28 05:49:26,783 INFO L87 Difference]: Start difference. First operand 664 states and 846 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:27,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:27,003 INFO L93 Difference]: Finished difference Result 634 states and 793 transitions. [2021-12-28 05:49:27,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 05:49:27,004 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-12-28 05:49:27,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:27,005 INFO L225 Difference]: With dead ends: 634 [2021-12-28 05:49:27,005 INFO L226 Difference]: Without dead ends: 634 [2021-12-28 05:49:27,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-12-28 05:49:27,005 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 280 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:27,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 1358 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:27,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-12-28 05:49:27,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 476. [2021-12-28 05:49:27,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 427 states have (on average 1.3536299765807962) internal successors, (578), 456 states have internal predecessors, (578), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 15 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-28 05:49:27,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 602 transitions. [2021-12-28 05:49:27,010 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 602 transitions. Word has length 45 [2021-12-28 05:49:27,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:27,010 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 602 transitions. [2021-12-28 05:49:27,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:27,010 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 602 transitions. [2021-12-28 05:49:27,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-28 05:49:27,011 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:27,011 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:27,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 05:49:27,228 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,SelfDestructingSolverStorable43 [2021-12-28 05:49:27,228 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:27,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:27,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1377360706, now seen corresponding path program 1 times [2021-12-28 05:49:27,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:27,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744461385] [2021-12-28 05:49:27,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:27,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:27,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:27,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:27,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:27,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:27,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744461385] [2021-12-28 05:49:27,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744461385] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:27,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:27,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 05:49:27,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245728944] [2021-12-28 05:49:27,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:27,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 05:49:27,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:27,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 05:49:27,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-28 05:49:27,700 INFO L87 Difference]: Start difference. First operand 476 states and 602 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:28,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:28,150 INFO L93 Difference]: Finished difference Result 674 states and 844 transitions. [2021-12-28 05:49:28,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 05:49:28,150 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-12-28 05:49:28,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:28,151 INFO L225 Difference]: With dead ends: 674 [2021-12-28 05:49:28,151 INFO L226 Difference]: Without dead ends: 674 [2021-12-28 05:49:28,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-28 05:49:28,152 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 231 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:28,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 1200 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:49:28,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-12-28 05:49:28,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 498. [2021-12-28 05:49:28,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 449 states have (on average 1.3385300668151447) internal successors, (601), 478 states have internal predecessors, (601), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 15 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-28 05:49:28,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 625 transitions. [2021-12-28 05:49:28,157 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 625 transitions. Word has length 49 [2021-12-28 05:49:28,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:28,157 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 625 transitions. [2021-12-28 05:49:28,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:28,157 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 625 transitions. [2021-12-28 05:49:28,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-28 05:49:28,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:28,158 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:28,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-28 05:49:28,158 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:28,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:28,158 INFO L85 PathProgramCache]: Analyzing trace with hash 399799259, now seen corresponding path program 1 times [2021-12-28 05:49:28,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:28,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488091885] [2021-12-28 05:49:28,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:28,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:28,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:28,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:28,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488091885] [2021-12-28 05:49:28,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488091885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:28,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:28,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 05:49:28,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001147740] [2021-12-28 05:49:28,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:28,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 05:49:28,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:28,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 05:49:28,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-12-28 05:49:28,322 INFO L87 Difference]: Start difference. First operand 498 states and 625 transitions. Second operand has 11 states, 10 states have (on average 4.8) internal successors, (48), 11 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:28,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:28,730 INFO L93 Difference]: Finished difference Result 962 states and 1198 transitions. [2021-12-28 05:49:28,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 05:49:28,730 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 11 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-12-28 05:49:28,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:28,731 INFO L225 Difference]: With dead ends: 962 [2021-12-28 05:49:28,732 INFO L226 Difference]: Without dead ends: 962 [2021-12-28 05:49:28,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-12-28 05:49:28,732 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 840 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:28,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 940 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:49:28,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2021-12-28 05:49:28,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 608. [2021-12-28 05:49:28,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 548 states have (on average 1.332116788321168) internal successors, (730), 579 states have internal predecessors, (730), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 21 states have call predecessors, (28), 14 states have call successors, (28) [2021-12-28 05:49:28,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 772 transitions. [2021-12-28 05:49:28,739 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 772 transitions. Word has length 50 [2021-12-28 05:49:28,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:28,740 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 772 transitions. [2021-12-28 05:49:28,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 11 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:28,740 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 772 transitions. [2021-12-28 05:49:28,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-28 05:49:28,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:28,740 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:28,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-28 05:49:28,741 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:28,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:28,741 INFO L85 PathProgramCache]: Analyzing trace with hash 399799260, now seen corresponding path program 1 times [2021-12-28 05:49:28,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:28,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35494663] [2021-12-28 05:49:28,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:28,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:28,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:29,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:29,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:29,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:29,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35494663] [2021-12-28 05:49:29,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35494663] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:29,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:29,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 05:49:29,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971271129] [2021-12-28 05:49:29,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:29,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 05:49:29,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:29,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 05:49:29,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-28 05:49:29,049 INFO L87 Difference]: Start difference. First operand 608 states and 772 transitions. Second operand has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:29,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:29,527 INFO L93 Difference]: Finished difference Result 928 states and 1162 transitions. [2021-12-28 05:49:29,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 05:49:29,528 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-12-28 05:49:29,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:29,529 INFO L225 Difference]: With dead ends: 928 [2021-12-28 05:49:29,529 INFO L226 Difference]: Without dead ends: 928 [2021-12-28 05:49:29,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-12-28 05:49:29,530 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 775 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:29,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 737 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:49:29,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-12-28 05:49:29,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 707. [2021-12-28 05:49:29,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 639 states have (on average 1.3364632237871674) internal successors, (854), 672 states have internal predecessors, (854), 18 states have call successors, (18), 9 states have call predecessors, (18), 18 states have return successors, (36), 25 states have call predecessors, (36), 18 states have call successors, (36) [2021-12-28 05:49:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 908 transitions. [2021-12-28 05:49:29,543 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 908 transitions. Word has length 50 [2021-12-28 05:49:29,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:29,543 INFO L470 AbstractCegarLoop]: Abstraction has 707 states and 908 transitions. [2021-12-28 05:49:29,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:29,543 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 908 transitions. [2021-12-28 05:49:29,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-28 05:49:29,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:29,544 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:29,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-28 05:49:29,544 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:29,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:29,545 INFO L85 PathProgramCache]: Analyzing trace with hash 397952217, now seen corresponding path program 1 times [2021-12-28 05:49:29,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:29,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730896775] [2021-12-28 05:49:29,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:29,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:29,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:29,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:29,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:29,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:29,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730896775] [2021-12-28 05:49:29,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730896775] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:49:29,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923417641] [2021-12-28 05:49:29,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:29,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:29,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:49:29,780 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) [2021-12-28 05:49:29,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 05:49:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:29,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-28 05:49:29,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:49:29,919 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-28 05:49:29,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-28 05:49:30,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-28 05:49:30,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-28 05:49:30,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-28 05:49:30,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-28 05:49:30,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-28 05:49:30,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-28 05:49:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:30,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:49:30,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923417641] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:30,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 05:49:30,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 22 [2021-12-28 05:49:30,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325941734] [2021-12-28 05:49:30,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:30,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 05:49:30,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:30,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 05:49:30,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-12-28 05:49:30,250 INFO L87 Difference]: Start difference. First operand 707 states and 908 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:30,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:30,776 INFO L93 Difference]: Finished difference Result 1592 states and 2006 transitions. [2021-12-28 05:49:30,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 05:49:30,777 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-12-28 05:49:30,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:30,779 INFO L225 Difference]: With dead ends: 1592 [2021-12-28 05:49:30,779 INFO L226 Difference]: Without dead ends: 1592 [2021-12-28 05:49:30,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-12-28 05:49:30,780 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 850 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:30,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [854 Valid, 1255 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:49:30,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-12-28 05:49:30,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 737. [2021-12-28 05:49:30,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 669 states have (on average 1.3288490284005978) internal successors, (889), 702 states have internal predecessors, (889), 18 states have call successors, (18), 9 states have call predecessors, (18), 18 states have return successors, (36), 25 states have call predecessors, (36), 18 states have call successors, (36) [2021-12-28 05:49:30,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 943 transitions. [2021-12-28 05:49:30,791 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 943 transitions. Word has length 50 [2021-12-28 05:49:30,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:30,791 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 943 transitions. [2021-12-28 05:49:30,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:30,792 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 943 transitions. [2021-12-28 05:49:30,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-28 05:49:30,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:30,793 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:30,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 05:49:31,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:31,010 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:31,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:31,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1779782164, now seen corresponding path program 1 times [2021-12-28 05:49:31,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:31,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274923202] [2021-12-28 05:49:31,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:31,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:31,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:31,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:31,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:31,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:31,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274923202] [2021-12-28 05:49:31,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274923202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:31,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:31,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-28 05:49:31,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73920717] [2021-12-28 05:49:31,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:31,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-28 05:49:31,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:31,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-28 05:49:31,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-12-28 05:49:31,278 INFO L87 Difference]: Start difference. First operand 737 states and 943 transitions. Second operand has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:32,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:32,026 INFO L93 Difference]: Finished difference Result 1847 states and 2361 transitions. [2021-12-28 05:49:32,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-28 05:49:32,026 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-12-28 05:49:32,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:32,028 INFO L225 Difference]: With dead ends: 1847 [2021-12-28 05:49:32,028 INFO L226 Difference]: Without dead ends: 1847 [2021-12-28 05:49:32,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-12-28 05:49:32,029 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 932 mSDsluCounter, 1928 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 2193 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:32,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [934 Valid, 2193 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1158 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 05:49:32,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2021-12-28 05:49:32,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 940. [2021-12-28 05:49:32,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 860 states have (on average 1.3325581395348838) internal successors, (1146), 896 states have internal predecessors, (1146), 24 states have call successors, (24), 12 states have call predecessors, (24), 24 states have return successors, (48), 31 states have call predecessors, (48), 24 states have call successors, (48) [2021-12-28 05:49:32,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1218 transitions. [2021-12-28 05:49:32,042 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1218 transitions. Word has length 50 [2021-12-28 05:49:32,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:32,042 INFO L470 AbstractCegarLoop]: Abstraction has 940 states and 1218 transitions. [2021-12-28 05:49:32,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:32,042 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1218 transitions. [2021-12-28 05:49:32,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-28 05:49:32,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:32,043 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:32,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-12-28 05:49:32,043 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:32,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:32,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1779782165, now seen corresponding path program 1 times [2021-12-28 05:49:32,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:32,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696957193] [2021-12-28 05:49:32,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:32,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:32,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:32,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:32,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696957193] [2021-12-28 05:49:32,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696957193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:32,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:32,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-28 05:49:32,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940357898] [2021-12-28 05:49:32,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:32,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 05:49:32,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:32,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 05:49:32,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-28 05:49:32,256 INFO L87 Difference]: Start difference. First operand 940 states and 1218 transitions. Second operand has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:32,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:32,961 INFO L93 Difference]: Finished difference Result 1869 states and 2407 transitions. [2021-12-28 05:49:32,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 05:49:32,962 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-12-28 05:49:32,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:32,964 INFO L225 Difference]: With dead ends: 1869 [2021-12-28 05:49:32,964 INFO L226 Difference]: Without dead ends: 1869 [2021-12-28 05:49:32,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-12-28 05:49:32,965 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 596 mSDsluCounter, 2016 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 2296 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:32,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 2296 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 05:49:32,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2021-12-28 05:49:32,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 829. [2021-12-28 05:49:32,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 761 states have (on average 1.3350854139290407) internal successors, (1016), 794 states have internal predecessors, (1016), 18 states have call successors, (18), 9 states have call predecessors, (18), 18 states have return successors, (36), 25 states have call predecessors, (36), 18 states have call successors, (36) [2021-12-28 05:49:32,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1070 transitions. [2021-12-28 05:49:32,975 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1070 transitions. Word has length 50 [2021-12-28 05:49:32,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:32,976 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 1070 transitions. [2021-12-28 05:49:32,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:32,976 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1070 transitions. [2021-12-28 05:49:32,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-28 05:49:32,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:32,976 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:32,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-28 05:49:32,977 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:32,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:32,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1777935122, now seen corresponding path program 1 times [2021-12-28 05:49:32,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:32,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919756086] [2021-12-28 05:49:32,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:32,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:33,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:33,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:33,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919756086] [2021-12-28 05:49:33,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919756086] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:33,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:33,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-28 05:49:33,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092377172] [2021-12-28 05:49:33,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:33,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 05:49:33,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:33,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 05:49:33,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-28 05:49:33,190 INFO L87 Difference]: Start difference. First operand 829 states and 1070 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:33,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:33,728 INFO L93 Difference]: Finished difference Result 1629 states and 2052 transitions. [2021-12-28 05:49:33,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 05:49:33,728 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-12-28 05:49:33,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:33,730 INFO L225 Difference]: With dead ends: 1629 [2021-12-28 05:49:33,731 INFO L226 Difference]: Without dead ends: 1629 [2021-12-28 05:49:33,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-12-28 05:49:33,731 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 668 mSDsluCounter, 1580 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 1796 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:33,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [672 Valid, 1796 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 05:49:33,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2021-12-28 05:49:33,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 834. [2021-12-28 05:49:33,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 766 states have (on average 1.3328981723237598) internal successors, (1021), 799 states have internal predecessors, (1021), 18 states have call successors, (18), 9 states have call predecessors, (18), 18 states have return successors, (36), 25 states have call predecessors, (36), 18 states have call successors, (36) [2021-12-28 05:49:33,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1075 transitions. [2021-12-28 05:49:33,742 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1075 transitions. Word has length 50 [2021-12-28 05:49:33,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:33,742 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 1075 transitions. [2021-12-28 05:49:33,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:33,742 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1075 transitions. [2021-12-28 05:49:33,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-28 05:49:33,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:33,743 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:33,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-12-28 05:49:33,743 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:33,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:33,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1311732840, now seen corresponding path program 1 times [2021-12-28 05:49:33,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:33,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665427874] [2021-12-28 05:49:33,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:33,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:34,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:34,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:34,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:34,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:34,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665427874] [2021-12-28 05:49:34,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665427874] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:49:34,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962299470] [2021-12-28 05:49:34,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:34,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:34,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:49:34,055 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) [2021-12-28 05:49:34,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 05:49:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:34,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-28 05:49:34,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:49:34,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 05:49:34,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-28 05:49:34,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:34,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-28 05:49:34,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-28 05:49:34,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:34,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 05:49:34,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962299470] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:34,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 05:49:34,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15] total 22 [2021-12-28 05:49:34,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121048253] [2021-12-28 05:49:34,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:34,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 05:49:34,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:34,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 05:49:34,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-12-28 05:49:34,656 INFO L87 Difference]: Start difference. First operand 834 states and 1075 transitions. Second operand has 11 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:35,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:35,037 INFO L93 Difference]: Finished difference Result 1525 states and 1952 transitions. [2021-12-28 05:49:35,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 05:49:35,037 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-12-28 05:49:35,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:35,039 INFO L225 Difference]: With dead ends: 1525 [2021-12-28 05:49:35,039 INFO L226 Difference]: Without dead ends: 1525 [2021-12-28 05:49:35,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=256, Invalid=800, Unknown=0, NotChecked=0, Total=1056 [2021-12-28 05:49:35,040 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 837 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:35,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [837 Valid, 933 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:49:35,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2021-12-28 05:49:35,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1066. [2021-12-28 05:49:35,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 974 states have (on average 1.3285420944558521) internal successors, (1294), 1013 states have internal predecessors, (1294), 30 states have call successors, (30), 15 states have call predecessors, (30), 30 states have return successors, (60), 37 states have call predecessors, (60), 30 states have call successors, (60) [2021-12-28 05:49:35,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1384 transitions. [2021-12-28 05:49:35,049 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1384 transitions. Word has length 51 [2021-12-28 05:49:35,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:35,049 INFO L470 AbstractCegarLoop]: Abstraction has 1066 states and 1384 transitions. [2021-12-28 05:49:35,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:35,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1384 transitions. [2021-12-28 05:49:35,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-28 05:49:35,050 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:35,050 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:35,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 05:49:35,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:35,267 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:35,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:35,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1311732841, now seen corresponding path program 1 times [2021-12-28 05:49:35,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:35,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518231049] [2021-12-28 05:49:35,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:35,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:35,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:35,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:35,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:35,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518231049] [2021-12-28 05:49:35,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518231049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:35,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:35,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-28 05:49:35,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274551569] [2021-12-28 05:49:35,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:35,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 05:49:35,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:35,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 05:49:35,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-28 05:49:35,692 INFO L87 Difference]: Start difference. First operand 1066 states and 1384 transitions. Second operand has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:36,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:36,693 INFO L93 Difference]: Finished difference Result 2540 states and 3330 transitions. [2021-12-28 05:49:36,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-28 05:49:36,704 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-12-28 05:49:36,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:36,707 INFO L225 Difference]: With dead ends: 2540 [2021-12-28 05:49:36,707 INFO L226 Difference]: Without dead ends: 2540 [2021-12-28 05:49:36,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=282, Invalid=908, Unknown=0, NotChecked=0, Total=1190 [2021-12-28 05:49:36,708 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 1741 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1743 SdHoareTripleChecker+Valid, 1322 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:36,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1743 Valid, 1322 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 05:49:36,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2021-12-28 05:49:36,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 1245. [2021-12-28 05:49:36,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1137 states have (on average 1.3333333333333333) internal successors, (1516), 1180 states have internal predecessors, (1516), 38 states have call successors, (38), 19 states have call predecessors, (38), 38 states have return successors, (76), 45 states have call predecessors, (76), 38 states have call successors, (76) [2021-12-28 05:49:36,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 1630 transitions. [2021-12-28 05:49:36,742 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 1630 transitions. Word has length 51 [2021-12-28 05:49:36,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:36,742 INFO L470 AbstractCegarLoop]: Abstraction has 1245 states and 1630 transitions. [2021-12-28 05:49:36,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:36,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 1630 transitions. [2021-12-28 05:49:36,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-28 05:49:36,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:36,743 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:36,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-12-28 05:49:36,743 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:36,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:36,743 INFO L85 PathProgramCache]: Analyzing trace with hash 2066269430, now seen corresponding path program 1 times [2021-12-28 05:49:36,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:36,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924971758] [2021-12-28 05:49:36,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:36,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:36,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:36,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:36,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:36,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924971758] [2021-12-28 05:49:36,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924971758] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:36,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:36,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 05:49:36,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731475290] [2021-12-28 05:49:36,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:36,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 05:49:36,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:36,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 05:49:36,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-28 05:49:36,868 INFO L87 Difference]: Start difference. First operand 1245 states and 1630 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:37,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:37,085 INFO L93 Difference]: Finished difference Result 1943 states and 2525 transitions. [2021-12-28 05:49:37,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 05:49:37,085 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-12-28 05:49:37,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:37,088 INFO L225 Difference]: With dead ends: 1943 [2021-12-28 05:49:37,088 INFO L226 Difference]: Without dead ends: 1943 [2021-12-28 05:49:37,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-12-28 05:49:37,088 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 769 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:37,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [769 Valid, 858 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:49:37,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states. [2021-12-28 05:49:37,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1943 to 1649. [2021-12-28 05:49:37,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1501 states have (on average 1.3324450366422385) internal successors, (2000), 1554 states have internal predecessors, (2000), 58 states have call successors, (58), 29 states have call predecessors, (58), 58 states have return successors, (116), 65 states have call predecessors, (116), 58 states have call successors, (116) [2021-12-28 05:49:37,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2174 transitions. [2021-12-28 05:49:37,104 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2174 transitions. Word has length 52 [2021-12-28 05:49:37,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:37,104 INFO L470 AbstractCegarLoop]: Abstraction has 1649 states and 2174 transitions. [2021-12-28 05:49:37,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:37,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2174 transitions. [2021-12-28 05:49:37,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-28 05:49:37,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:37,105 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:37,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-12-28 05:49:37,105 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:37,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:37,106 INFO L85 PathProgramCache]: Analyzing trace with hash 2009011128, now seen corresponding path program 1 times [2021-12-28 05:49:37,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:37,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530329172] [2021-12-28 05:49:37,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:37,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:37,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:37,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:37,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530329172] [2021-12-28 05:49:37,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530329172] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:37,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:37,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-28 05:49:37,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401963780] [2021-12-28 05:49:37,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:37,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 05:49:37,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:37,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 05:49:37,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-28 05:49:37,384 INFO L87 Difference]: Start difference. First operand 1649 states and 2174 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:38,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:38,304 INFO L93 Difference]: Finished difference Result 2946 states and 3872 transitions. [2021-12-28 05:49:38,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-28 05:49:38,305 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-12-28 05:49:38,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:38,309 INFO L225 Difference]: With dead ends: 2946 [2021-12-28 05:49:38,309 INFO L226 Difference]: Without dead ends: 2946 [2021-12-28 05:49:38,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2021-12-28 05:49:38,310 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 1457 mSDsluCounter, 1458 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 1629 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:38,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1459 Valid, 1629 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:49:38,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2946 states. [2021-12-28 05:49:38,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2946 to 1649. [2021-12-28 05:49:38,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1501 states have (on average 1.3324450366422385) internal successors, (2000), 1554 states have internal predecessors, (2000), 58 states have call successors, (58), 29 states have call predecessors, (58), 58 states have return successors, (116), 65 states have call predecessors, (116), 58 states have call successors, (116) [2021-12-28 05:49:38,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2174 transitions. [2021-12-28 05:49:38,328 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2174 transitions. Word has length 52 [2021-12-28 05:49:38,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:38,329 INFO L470 AbstractCegarLoop]: Abstraction has 1649 states and 2174 transitions. [2021-12-28 05:49:38,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:38,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2174 transitions. [2021-12-28 05:49:38,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-28 05:49:38,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:38,329 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:38,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-12-28 05:49:38,330 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:38,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:38,330 INFO L85 PathProgramCache]: Analyzing trace with hash 842252799, now seen corresponding path program 1 times [2021-12-28 05:49:38,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:38,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001893892] [2021-12-28 05:49:38,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:38,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:38,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:38,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:38,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001893892] [2021-12-28 05:49:38,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001893892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:38,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:38,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 05:49:38,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915701193] [2021-12-28 05:49:38,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:38,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 05:49:38,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:38,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 05:49:38,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-28 05:49:38,476 INFO L87 Difference]: Start difference. First operand 1649 states and 2174 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:38,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:38,721 INFO L93 Difference]: Finished difference Result 2035 states and 2650 transitions. [2021-12-28 05:49:38,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 05:49:38,722 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-12-28 05:49:38,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:38,724 INFO L225 Difference]: With dead ends: 2035 [2021-12-28 05:49:38,724 INFO L226 Difference]: Without dead ends: 2035 [2021-12-28 05:49:38,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-12-28 05:49:38,725 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 397 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:38,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 1157 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:49:38,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2021-12-28 05:49:38,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 1341. [2021-12-28 05:49:38,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1225 states have (on average 1.3338775510204082) internal successors, (1634), 1270 states have internal predecessors, (1634), 42 states have call successors, (42), 21 states have call predecessors, (42), 42 states have return successors, (84), 49 states have call predecessors, (84), 42 states have call successors, (84) [2021-12-28 05:49:38,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 1760 transitions. [2021-12-28 05:49:38,748 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 1760 transitions. Word has length 52 [2021-12-28 05:49:38,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:38,749 INFO L470 AbstractCegarLoop]: Abstraction has 1341 states and 1760 transitions. [2021-12-28 05:49:38,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:38,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 1760 transitions. [2021-12-28 05:49:38,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-28 05:49:38,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:38,749 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:38,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-12-28 05:49:38,750 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:38,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:38,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1411489050, now seen corresponding path program 1 times [2021-12-28 05:49:38,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:38,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457355545] [2021-12-28 05:49:38,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:38,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:38,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:38,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:38,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:38,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:38,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:38,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457355545] [2021-12-28 05:49:38,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457355545] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:38,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:38,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-28 05:49:38,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916626940] [2021-12-28 05:49:38,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:38,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 05:49:38,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:38,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 05:49:38,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-28 05:49:38,993 INFO L87 Difference]: Start difference. First operand 1341 states and 1760 transitions. Second operand has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:39,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:39,495 INFO L93 Difference]: Finished difference Result 2139 states and 2791 transitions. [2021-12-28 05:49:39,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-28 05:49:39,495 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-12-28 05:49:39,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:39,498 INFO L225 Difference]: With dead ends: 2139 [2021-12-28 05:49:39,498 INFO L226 Difference]: Without dead ends: 2139 [2021-12-28 05:49:39,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-12-28 05:49:39,498 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 851 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:39,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 810 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:49:39,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2021-12-28 05:49:39,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 1849. [2021-12-28 05:49:39,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1685 states have (on average 1.3359050445103857) internal successors, (2251), 1742 states have internal predecessors, (2251), 66 states have call successors, (66), 33 states have call predecessors, (66), 66 states have return successors, (132), 73 states have call predecessors, (132), 66 states have call successors, (132) [2021-12-28 05:49:39,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2449 transitions. [2021-12-28 05:49:39,516 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2449 transitions. Word has length 54 [2021-12-28 05:49:39,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:39,516 INFO L470 AbstractCegarLoop]: Abstraction has 1849 states and 2449 transitions. [2021-12-28 05:49:39,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:39,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2449 transitions. [2021-12-28 05:49:39,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-28 05:49:39,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:39,517 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:39,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-12-28 05:49:39,518 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:39,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:39,518 INFO L85 PathProgramCache]: Analyzing trace with hash -2074131620, now seen corresponding path program 1 times [2021-12-28 05:49:39,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:39,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021973915] [2021-12-28 05:49:39,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:39,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:39,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:39,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:39,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:39,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021973915] [2021-12-28 05:49:39,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021973915] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:39,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:39,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-28 05:49:39,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401066535] [2021-12-28 05:49:39,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:39,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 05:49:39,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:39,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 05:49:39,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-28 05:49:39,786 INFO L87 Difference]: Start difference. First operand 1849 states and 2449 transitions. Second operand has 14 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:41,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:41,149 INFO L93 Difference]: Finished difference Result 3328 states and 4408 transitions. [2021-12-28 05:49:41,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-28 05:49:41,150 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-12-28 05:49:41,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:41,155 INFO L225 Difference]: With dead ends: 3328 [2021-12-28 05:49:41,155 INFO L226 Difference]: Without dead ends: 3328 [2021-12-28 05:49:41,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=379, Invalid=1343, Unknown=0, NotChecked=0, Total=1722 [2021-12-28 05:49:41,156 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 1568 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1570 SdHoareTripleChecker+Valid, 1561 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:41,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1570 Valid, 1561 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 05:49:41,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2021-12-28 05:49:41,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 1849. [2021-12-28 05:49:41,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1685 states have (on average 1.3359050445103857) internal successors, (2251), 1742 states have internal predecessors, (2251), 66 states have call successors, (66), 33 states have call predecessors, (66), 66 states have return successors, (132), 73 states have call predecessors, (132), 66 states have call successors, (132) [2021-12-28 05:49:41,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2449 transitions. [2021-12-28 05:49:41,186 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2449 transitions. Word has length 54 [2021-12-28 05:49:41,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:41,186 INFO L470 AbstractCegarLoop]: Abstraction has 1849 states and 2449 transitions. [2021-12-28 05:49:41,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:41,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2449 transitions. [2021-12-28 05:49:41,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-28 05:49:41,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:41,188 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:41,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-12-28 05:49:41,188 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:41,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:41,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1952545763, now seen corresponding path program 1 times [2021-12-28 05:49:41,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:41,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359008737] [2021-12-28 05:49:41,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:41,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:41,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:41,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:41,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:41,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359008737] [2021-12-28 05:49:41,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359008737] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:41,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:41,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-28 05:49:41,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235282932] [2021-12-28 05:49:41,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:41,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 05:49:41,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:41,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 05:49:41,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-28 05:49:41,443 INFO L87 Difference]: Start difference. First operand 1849 states and 2449 transitions. Second operand has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:41,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:41,972 INFO L93 Difference]: Finished difference Result 2961 states and 3905 transitions. [2021-12-28 05:49:41,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-28 05:49:41,972 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-12-28 05:49:41,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:41,975 INFO L225 Difference]: With dead ends: 2961 [2021-12-28 05:49:41,976 INFO L226 Difference]: Without dead ends: 2961 [2021-12-28 05:49:41,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2021-12-28 05:49:41,977 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 784 mSDsluCounter, 1860 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 2180 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:41,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 2180 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:49:41,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2961 states. [2021-12-28 05:49:41,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2961 to 1821. [2021-12-28 05:49:41,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1657 states have (on average 1.3349426674713338) internal successors, (2212), 1714 states have internal predecessors, (2212), 66 states have call successors, (66), 33 states have call predecessors, (66), 66 states have return successors, (132), 73 states have call predecessors, (132), 66 states have call successors, (132) [2021-12-28 05:49:42,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 2410 transitions. [2021-12-28 05:49:42,000 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 2410 transitions. Word has length 54 [2021-12-28 05:49:42,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:42,000 INFO L470 AbstractCegarLoop]: Abstraction has 1821 states and 2410 transitions. [2021-12-28 05:49:42,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 05:49:42,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 2410 transitions. [2021-12-28 05:49:42,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-28 05:49:42,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:42,001 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 05:49:42,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-12-28 05:49:42,002 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:42,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:42,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1262088084, now seen corresponding path program 1 times [2021-12-28 05:49:42,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:42,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593575854] [2021-12-28 05:49:42,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:42,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:42,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:42,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:42,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:42,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 05:49:42,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:42,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 05:49:42,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:42,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593575854] [2021-12-28 05:49:42,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593575854] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:49:42,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:49:42,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-28 05:49:42,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190944458] [2021-12-28 05:49:42,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:49:42,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 05:49:42,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:42,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 05:49:42,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-28 05:49:42,308 INFO L87 Difference]: Start difference. First operand 1821 states and 2410 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 05:49:43,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:43,232 INFO L93 Difference]: Finished difference Result 3722 states and 4937 transitions. [2021-12-28 05:49:43,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-28 05:49:43,232 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2021-12-28 05:49:43,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:43,237 INFO L225 Difference]: With dead ends: 3722 [2021-12-28 05:49:43,237 INFO L226 Difference]: Without dead ends: 3720 [2021-12-28 05:49:43,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=283, Invalid=773, Unknown=0, NotChecked=0, Total=1056 [2021-12-28 05:49:43,238 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 1623 mSDsluCounter, 2164 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1623 SdHoareTripleChecker+Valid, 2415 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:43,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1623 Valid, 2415 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 05:49:43,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3720 states. [2021-12-28 05:49:43,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3720 to 1782. [2021-12-28 05:49:43,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1622 states have (on average 1.3298397040690506) internal successors, (2157), 1678 states have internal predecessors, (2157), 64 states have call successors, (64), 32 states have call predecessors, (64), 64 states have return successors, (128), 71 states have call predecessors, (128), 64 states have call successors, (128) [2021-12-28 05:49:43,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 2349 transitions. [2021-12-28 05:49:43,260 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 2349 transitions. Word has length 56 [2021-12-28 05:49:43,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:43,261 INFO L470 AbstractCegarLoop]: Abstraction has 1782 states and 2349 transitions. [2021-12-28 05:49:43,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 05:49:43,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 2349 transitions. [2021-12-28 05:49:43,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-28 05:49:43,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:43,262 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:43,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-12-28 05:49:43,262 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:43,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:43,263 INFO L85 PathProgramCache]: Analyzing trace with hash 829418521, now seen corresponding path program 1 times [2021-12-28 05:49:43,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:43,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512635325] [2021-12-28 05:49:43,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:43,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:43,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:43,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 05:49:43,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 05:49:43,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:43,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512635325] [2021-12-28 05:49:43,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512635325] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:49:43,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684495899] [2021-12-28 05:49:43,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:43,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:43,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:49:43,640 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) [2021-12-28 05:49:43,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 05:49:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:43,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-28 05:49:43,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:49:43,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 05:49:44,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-28 05:49:44,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:44,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-28 05:49:44,322 INFO L353 Elim1Store]: treesize reduction 36, result has 37.9 percent of original size [2021-12-28 05:49:44,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 33 [2021-12-28 05:49:44,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-28 05:49:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:44,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:49:44,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684495899] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:49:44,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:49:44,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 24 [2021-12-28 05:49:44,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591094408] [2021-12-28 05:49:44,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:49:44,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-28 05:49:44,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:44,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-28 05:49:44,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-12-28 05:49:44,480 INFO L87 Difference]: Start difference. First operand 1782 states and 2349 transitions. Second operand has 25 states, 24 states have (on average 4.166666666666667) internal successors, (100), 22 states have internal predecessors, (100), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 05:49:45,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:45,518 INFO L93 Difference]: Finished difference Result 3018 states and 3950 transitions. [2021-12-28 05:49:45,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-28 05:49:45,518 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.166666666666667) internal successors, (100), 22 states have internal predecessors, (100), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 56 [2021-12-28 05:49:45,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:45,523 INFO L225 Difference]: With dead ends: 3018 [2021-12-28 05:49:45,523 INFO L226 Difference]: Without dead ends: 3018 [2021-12-28 05:49:45,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=497, Invalid=1953, Unknown=0, NotChecked=0, Total=2450 [2021-12-28 05:49:45,524 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 2022 mSDsluCounter, 1912 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2023 SdHoareTripleChecker+Valid, 2100 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:45,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2023 Valid, 2100 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 05:49:45,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2021-12-28 05:49:45,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 1812. [2021-12-28 05:49:45,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1652 states have (on average 1.3286924939467313) internal successors, (2195), 1705 states have internal predecessors, (2195), 64 states have call successors, (64), 32 states have call predecessors, (64), 64 states have return successors, (128), 74 states have call predecessors, (128), 64 states have call successors, (128) [2021-12-28 05:49:45,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 2387 transitions. [2021-12-28 05:49:45,555 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 2387 transitions. Word has length 56 [2021-12-28 05:49:45,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:45,555 INFO L470 AbstractCegarLoop]: Abstraction has 1812 states and 2387 transitions. [2021-12-28 05:49:45,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.166666666666667) internal successors, (100), 22 states have internal predecessors, (100), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 05:49:45,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 2387 transitions. [2021-12-28 05:49:45,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-28 05:49:45,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:45,556 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:45,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 05:49:45,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:45,777 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:45,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:45,778 INFO L85 PathProgramCache]: Analyzing trace with hash 829418522, now seen corresponding path program 1 times [2021-12-28 05:49:45,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:45,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317160550] [2021-12-28 05:49:45,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:45,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:45,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:46,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:46,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 05:49:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:46,285 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 05:49:46,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:46,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317160550] [2021-12-28 05:49:46,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317160550] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:49:46,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388033489] [2021-12-28 05:49:46,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:46,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:46,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:49:46,300 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) [2021-12-28 05:49:46,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 05:49:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:46,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-28 05:49:46,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:49:46,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 05:49:46,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-12-28 05:49:46,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-28 05:49:47,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:47,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2021-12-28 05:49:47,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:47,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 46 [2021-12-28 05:49:47,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:47,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2021-12-28 05:49:47,341 INFO L353 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-28 05:49:47,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-28 05:49:47,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-12-28 05:49:47,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-12-28 05:49:47,508 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:47,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:49:47,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388033489] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:49:47,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:49:47,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 29 [2021-12-28 05:49:47,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960836654] [2021-12-28 05:49:47,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:49:47,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-28 05:49:47,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:47,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-28 05:49:47,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2021-12-28 05:49:47,698 INFO L87 Difference]: Start difference. First operand 1812 states and 2387 transitions. Second operand has 30 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 27 states have internal predecessors, (101), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 05:49:49,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:49,759 INFO L93 Difference]: Finished difference Result 3570 states and 4717 transitions. [2021-12-28 05:49:49,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-28 05:49:49,760 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 27 states have internal predecessors, (101), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 56 [2021-12-28 05:49:49,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:49,763 INFO L225 Difference]: With dead ends: 3570 [2021-12-28 05:49:49,763 INFO L226 Difference]: Without dead ends: 3570 [2021-12-28 05:49:49,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=666, Invalid=3116, Unknown=0, NotChecked=0, Total=3782 [2021-12-28 05:49:49,764 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 4213 mSDsluCounter, 2994 mSDsCounter, 0 mSdLazyCounter, 2314 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4214 SdHoareTripleChecker+Valid, 3145 SdHoareTripleChecker+Invalid, 2625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 2314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:49,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4214 Valid, 3145 Invalid, 2625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 2314 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 05:49:49,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3570 states. [2021-12-28 05:49:49,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3570 to 1812. [2021-12-28 05:49:49,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1652 states have (on average 1.3268765133171914) internal successors, (2192), 1705 states have internal predecessors, (2192), 64 states have call successors, (64), 32 states have call predecessors, (64), 64 states have return successors, (128), 74 states have call predecessors, (128), 64 states have call successors, (128) [2021-12-28 05:49:49,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 2384 transitions. [2021-12-28 05:49:49,791 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 2384 transitions. Word has length 56 [2021-12-28 05:49:49,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:49,791 INFO L470 AbstractCegarLoop]: Abstraction has 1812 states and 2384 transitions. [2021-12-28 05:49:49,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 27 states have internal predecessors, (101), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 05:49:49,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 2384 transitions. [2021-12-28 05:49:49,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-28 05:49:49,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:49,792 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 05:49:49,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-28 05:49:50,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:50,027 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:50,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:50,027 INFO L85 PathProgramCache]: Analyzing trace with hash -997629707, now seen corresponding path program 1 times [2021-12-28 05:49:50,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:50,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725255965] [2021-12-28 05:49:50,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:50,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:50,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:50,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 05:49:50,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:50,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 05:49:50,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:50,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725255965] [2021-12-28 05:49:50,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725255965] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:49:50,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440801865] [2021-12-28 05:49:50,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:50,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:50,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:49:50,511 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) [2021-12-28 05:49:50,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 05:49:50,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:50,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-28 05:49:50,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:49:51,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-28 05:49:51,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:51,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2021-12-28 05:49:51,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:51,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:51,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:49:51,272 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:49:51,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 64 [2021-12-28 05:49:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:51,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:49:51,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 98 [2021-12-28 05:49:51,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 98 [2021-12-28 05:49:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 05:49:52,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440801865] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:49:52,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:49:52,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 16] total 45 [2021-12-28 05:49:52,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714778980] [2021-12-28 05:49:52,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:49:52,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-28 05:49:52,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:52,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-28 05:49:52,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1823, Unknown=0, NotChecked=0, Total=1980 [2021-12-28 05:49:52,332 INFO L87 Difference]: Start difference. First operand 1812 states and 2384 transitions. Second operand has 45 states, 45 states have (on average 3.2888888888888888) internal successors, (148), 42 states have internal predecessors, (148), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 05:49:58,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:49:58,757 INFO L93 Difference]: Finished difference Result 7246 states and 9494 transitions. [2021-12-28 05:49:58,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-28 05:49:58,757 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.2888888888888888) internal successors, (148), 42 states have internal predecessors, (148), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 56 [2021-12-28 05:49:58,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:49:58,764 INFO L225 Difference]: With dead ends: 7246 [2021-12-28 05:49:58,765 INFO L226 Difference]: Without dead ends: 7244 [2021-12-28 05:49:58,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3259 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2201, Invalid=10231, Unknown=0, NotChecked=0, Total=12432 [2021-12-28 05:49:58,766 INFO L933 BasicCegarLoop]: 757 mSDtfsCounter, 3919 mSDsluCounter, 18801 mSDsCounter, 0 mSdLazyCounter, 7928 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3919 SdHoareTripleChecker+Valid, 19558 SdHoareTripleChecker+Invalid, 8285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 7928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:49:58,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3919 Valid, 19558 Invalid, 8285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 7928 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-28 05:49:58,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7244 states. [2021-12-28 05:49:58,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7244 to 1771. [2021-12-28 05:49:58,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1771 states, 1615 states have (on average 1.3195046439628484) internal successors, (2131), 1667 states have internal predecessors, (2131), 62 states have call successors, (62), 31 states have call predecessors, (62), 62 states have return successors, (124), 72 states have call predecessors, (124), 62 states have call successors, (124) [2021-12-28 05:49:58,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 2317 transitions. [2021-12-28 05:49:58,803 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 2317 transitions. Word has length 56 [2021-12-28 05:49:58,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:49:58,803 INFO L470 AbstractCegarLoop]: Abstraction has 1771 states and 2317 transitions. [2021-12-28 05:49:58,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.2888888888888888) internal successors, (148), 42 states have internal predecessors, (148), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 05:49:58,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 2317 transitions. [2021-12-28 05:49:58,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 05:49:58,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:49:58,804 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:49:58,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 05:49:59,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:59,020 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:49:59,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:49:59,021 INFO L85 PathProgramCache]: Analyzing trace with hash -773789015, now seen corresponding path program 1 times [2021-12-28 05:49:59,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:49:59,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26176710] [2021-12-28 05:49:59,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:59,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:49:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:59,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:49:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:59,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 05:49:59,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 05:49:59,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:49:59,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26176710] [2021-12-28 05:49:59,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26176710] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:49:59,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900427371] [2021-12-28 05:49:59,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:49:59,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:49:59,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:49:59,176 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) [2021-12-28 05:49:59,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 05:49:59,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:49:59,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-28 05:49:59,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:49:59,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 05:49:59,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-28 05:49:59,723 INFO L353 Elim1Store]: treesize reduction 42, result has 38.2 percent of original size [2021-12-28 05:49:59,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 37 [2021-12-28 05:49:59,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:49:59,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-28 05:49:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:49:59,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:49:59,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900427371] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:49:59,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:49:59,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-12-28 05:49:59,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331939191] [2021-12-28 05:49:59,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:49:59,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-28 05:49:59,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:49:59,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-28 05:49:59,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-12-28 05:49:59,911 INFO L87 Difference]: Start difference. First operand 1771 states and 2317 transitions. Second operand has 20 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 05:50:00,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:50:00,560 INFO L93 Difference]: Finished difference Result 3366 states and 4398 transitions. [2021-12-28 05:50:00,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 05:50:00,560 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2021-12-28 05:50:00,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:50:00,563 INFO L225 Difference]: With dead ends: 3366 [2021-12-28 05:50:00,563 INFO L226 Difference]: Without dead ends: 3366 [2021-12-28 05:50:00,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2021-12-28 05:50:00,564 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 939 mSDsluCounter, 2048 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 2267 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 05:50:00,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [939 Valid, 2267 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 880 Invalid, 0 Unknown, 143 Unchecked, 0.4s Time] [2021-12-28 05:50:00,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3366 states. [2021-12-28 05:50:00,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3366 to 3110. [2021-12-28 05:50:00,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3110 states, 2842 states have (on average 1.322308233638283) internal successors, (3758), 2925 states have internal predecessors, (3758), 112 states have call successors, (112), 62 states have call predecessors, (112), 124 states have return successors, (224), 122 states have call predecessors, (224), 112 states have call successors, (224) [2021-12-28 05:50:00,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3110 states to 3110 states and 4094 transitions. [2021-12-28 05:50:00,596 INFO L78 Accepts]: Start accepts. Automaton has 3110 states and 4094 transitions. Word has length 57 [2021-12-28 05:50:00,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:50:00,596 INFO L470 AbstractCegarLoop]: Abstraction has 3110 states and 4094 transitions. [2021-12-28 05:50:00,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 05:50:00,596 INFO L276 IsEmpty]: Start isEmpty. Operand 3110 states and 4094 transitions. [2021-12-28 05:50:00,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 05:50:00,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:50:00,597 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:50:00,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-28 05:50:00,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-12-28 05:50:00,811 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:50:00,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:50:00,812 INFO L85 PathProgramCache]: Analyzing trace with hash -773789014, now seen corresponding path program 1 times [2021-12-28 05:50:00,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:50:00,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344470235] [2021-12-28 05:50:00,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:00,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:50:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:01,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:50:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:01,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 05:50:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 05:50:01,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:50:01,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344470235] [2021-12-28 05:50:01,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344470235] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:50:01,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886954795] [2021-12-28 05:50:01,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:01,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:01,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:50:01,051 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:50:01,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 05:50:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:01,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-28 05:50:01,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:50:01,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 05:50:01,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-28 05:50:01,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-28 05:50:01,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:50:01,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-12-28 05:50:01,960 INFO L353 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2021-12-28 05:50:01,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-28 05:50:02,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:50:02,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-28 05:50:02,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:50:02,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-28 05:50:02,224 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:50:02,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:50:02,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886954795] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:50:02,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:50:02,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 25 [2021-12-28 05:50:02,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602410446] [2021-12-28 05:50:02,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:50:02,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-28 05:50:02,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:50:02,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-28 05:50:02,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-12-28 05:50:02,411 INFO L87 Difference]: Start difference. First operand 3110 states and 4094 transitions. Second operand has 26 states, 25 states have (on average 4.2) internal successors, (105), 24 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 05:50:04,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:50:04,514 INFO L93 Difference]: Finished difference Result 5227 states and 6881 transitions. [2021-12-28 05:50:04,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-28 05:50:04,515 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.2) internal successors, (105), 24 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2021-12-28 05:50:04,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:50:04,519 INFO L225 Difference]: With dead ends: 5227 [2021-12-28 05:50:04,520 INFO L226 Difference]: Without dead ends: 5227 [2021-12-28 05:50:04,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=439, Invalid=2213, Unknown=0, NotChecked=0, Total=2652 [2021-12-28 05:50:04,520 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 1590 mSDsluCounter, 3548 mSDsCounter, 0 mSdLazyCounter, 1650 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1590 SdHoareTripleChecker+Valid, 3787 SdHoareTripleChecker+Invalid, 2485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 718 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 05:50:04,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1590 Valid, 3787 Invalid, 2485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1650 Invalid, 0 Unknown, 718 Unchecked, 0.9s Time] [2021-12-28 05:50:04,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5227 states. [2021-12-28 05:50:04,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5227 to 4407. [2021-12-28 05:50:04,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4407 states, 4045 states have (on average 1.323114956736712) internal successors, (5352), 4147 states have internal predecessors, (5352), 156 states have call successors, (156), 87 states have call predecessors, (156), 174 states have return successors, (312), 172 states have call predecessors, (312), 156 states have call successors, (312) [2021-12-28 05:50:04,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4407 states to 4407 states and 5820 transitions. [2021-12-28 05:50:04,635 INFO L78 Accepts]: Start accepts. Automaton has 4407 states and 5820 transitions. Word has length 57 [2021-12-28 05:50:04,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:50:04,635 INFO L470 AbstractCegarLoop]: Abstraction has 4407 states and 5820 transitions. [2021-12-28 05:50:04,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.2) internal successors, (105), 24 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 05:50:04,635 INFO L276 IsEmpty]: Start isEmpty. Operand 4407 states and 5820 transitions. [2021-12-28 05:50:04,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 05:50:04,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:50:04,636 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:50:04,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-28 05:50:04,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:04,849 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:50:04,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:50:04,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1165513920, now seen corresponding path program 1 times [2021-12-28 05:50:04,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:50:04,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528297244] [2021-12-28 05:50:04,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:04,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:50:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:05,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:50:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:05,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 05:50:05,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 05:50:05,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:50:05,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528297244] [2021-12-28 05:50:05,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528297244] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:50:05,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523858655] [2021-12-28 05:50:05,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:05,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:05,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:50:05,172 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:50:05,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-28 05:50:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:05,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-28 05:50:05,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:50:05,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 05:50:05,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-28 05:50:05,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:50:05,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-28 05:50:05,713 INFO L353 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-12-28 05:50:05,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-12-28 05:50:05,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-28 05:50:05,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:50:05,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:50:05,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523858655] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:50:05,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:50:05,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 23 [2021-12-28 05:50:05,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93680929] [2021-12-28 05:50:05,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:50:05,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-28 05:50:05,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:50:05,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-28 05:50:05,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-12-28 05:50:05,801 INFO L87 Difference]: Start difference. First operand 4407 states and 5820 transitions. Second operand has 24 states, 23 states have (on average 4.521739130434782) internal successors, (104), 20 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 05:50:06,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:50:06,673 INFO L93 Difference]: Finished difference Result 6237 states and 8242 transitions. [2021-12-28 05:50:06,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-28 05:50:06,674 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.521739130434782) internal successors, (104), 20 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2021-12-28 05:50:06,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:50:06,680 INFO L225 Difference]: With dead ends: 6237 [2021-12-28 05:50:06,685 INFO L226 Difference]: Without dead ends: 6237 [2021-12-28 05:50:06,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=292, Invalid=1114, Unknown=0, NotChecked=0, Total=1406 [2021-12-28 05:50:06,686 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 1272 mSDsluCounter, 3222 mSDsCounter, 0 mSdLazyCounter, 1835 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1272 SdHoareTripleChecker+Valid, 3512 SdHoareTripleChecker+Invalid, 1882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 05:50:06,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1272 Valid, 3512 Invalid, 1882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1835 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 05:50:06,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6237 states. [2021-12-28 05:50:06,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6237 to 4473. [2021-12-28 05:50:06,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4473 states, 4111 states have (on average 1.3218195086353686) internal successors, (5434), 4207 states have internal predecessors, (5434), 156 states have call successors, (156), 87 states have call predecessors, (156), 174 states have return successors, (312), 178 states have call predecessors, (312), 156 states have call successors, (312) [2021-12-28 05:50:06,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4473 states to 4473 states and 5902 transitions. [2021-12-28 05:50:06,790 INFO L78 Accepts]: Start accepts. Automaton has 4473 states and 5902 transitions. Word has length 57 [2021-12-28 05:50:06,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:50:06,794 INFO L470 AbstractCegarLoop]: Abstraction has 4473 states and 5902 transitions. [2021-12-28 05:50:06,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.521739130434782) internal successors, (104), 20 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 05:50:06,794 INFO L276 IsEmpty]: Start isEmpty. Operand 4473 states and 5902 transitions. [2021-12-28 05:50:06,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 05:50:06,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:50:06,795 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:50:06,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-28 05:50:07,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-12-28 05:50:07,013 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:50:07,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:50:07,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1165513919, now seen corresponding path program 1 times [2021-12-28 05:50:07,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:50:07,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850992340] [2021-12-28 05:50:07,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:07,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:50:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:07,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:50:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:07,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 05:50:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 05:50:07,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:50:07,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850992340] [2021-12-28 05:50:07,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850992340] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:50:07,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641095236] [2021-12-28 05:50:07,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:07,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:07,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:50:07,364 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:50:07,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-28 05:50:07,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:07,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-28 05:50:07,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:50:07,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 05:50:07,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-28 05:50:07,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-28 05:50:07,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-28 05:50:08,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:50:08,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2021-12-28 05:50:08,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:50:08,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-12-28 05:50:08,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:50:08,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:50:08,268 INFO L353 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-28 05:50:08,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-28 05:50:08,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-28 05:50:08,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-28 05:50:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:50:08,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:50:08,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641095236] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:50:08,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 05:50:08,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 25 [2021-12-28 05:50:08,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115247238] [2021-12-28 05:50:08,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 05:50:08,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-28 05:50:08,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:50:08,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-28 05:50:08,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-12-28 05:50:08,601 INFO L87 Difference]: Start difference. First operand 4473 states and 5902 transitions. Second operand has 26 states, 25 states have (on average 4.12) internal successors, (103), 22 states have internal predecessors, (103), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 05:50:10,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:50:10,221 INFO L93 Difference]: Finished difference Result 7486 states and 9907 transitions. [2021-12-28 05:50:10,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-28 05:50:10,222 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.12) internal successors, (103), 22 states have internal predecessors, (103), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2021-12-28 05:50:10,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:50:10,231 INFO L225 Difference]: With dead ends: 7486 [2021-12-28 05:50:10,231 INFO L226 Difference]: Without dead ends: 7486 [2021-12-28 05:50:10,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=528, Invalid=2228, Unknown=0, NotChecked=0, Total=2756 [2021-12-28 05:50:10,232 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 2381 mSDsluCounter, 3185 mSDsCounter, 0 mSdLazyCounter, 2315 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2381 SdHoareTripleChecker+Valid, 3478 SdHoareTripleChecker+Invalid, 2448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 05:50:10,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2381 Valid, 3478 Invalid, 2448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2315 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 05:50:10,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7486 states. [2021-12-28 05:50:10,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7486 to 4566. [2021-12-28 05:50:10,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4566 states, 4204 states have (on average 1.318744053282588) internal successors, (5544), 4291 states have internal predecessors, (5544), 156 states have call successors, (156), 87 states have call predecessors, (156), 174 states have return successors, (312), 187 states have call predecessors, (312), 156 states have call successors, (312) [2021-12-28 05:50:10,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4566 states to 4566 states and 6012 transitions. [2021-12-28 05:50:10,311 INFO L78 Accepts]: Start accepts. Automaton has 4566 states and 6012 transitions. Word has length 57 [2021-12-28 05:50:10,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:50:10,311 INFO L470 AbstractCegarLoop]: Abstraction has 4566 states and 6012 transitions. [2021-12-28 05:50:10,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.12) internal successors, (103), 22 states have internal predecessors, (103), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 05:50:10,311 INFO L276 IsEmpty]: Start isEmpty. Operand 4566 states and 6012 transitions. [2021-12-28 05:50:10,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 05:50:10,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:50:10,312 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 05:50:10,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-28 05:50:10,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-12-28 05:50:10,529 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 61 more)] === [2021-12-28 05:50:10,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:50:10,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1940784111, now seen corresponding path program 1 times [2021-12-28 05:50:10,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:50:10,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21929569] [2021-12-28 05:50:10,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:10,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:50:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:11,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 05:50:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:50:11,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:50:11,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21929569] [2021-12-28 05:50:11,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21929569] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:50:11,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393752050] [2021-12-28 05:50:11,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:50:11,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:50:11,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:50:11,207 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 05:50:11,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-28 05:50:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:50:11,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-28 05:50:11,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:50:11,478 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-28 05:50:11,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-28 05:50:11,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-28 05:50:11,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-28 05:50:11,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:50:11,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:50:11,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:50:11,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:50:12,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:50:12,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:50:12,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:50:12,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:50:12,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-28 05:50:12,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-12-28 05:50:12,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:50:12,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:50:12,538 INFO L353 Elim1Store]: treesize reduction 31, result has 20.5 percent of original size [2021-12-28 05:50:12,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 45 [2021-12-28 05:50:12,545 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:50:12,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-28 05:50:12,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:50:12,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:50:12,793 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|) |c_ULTIMATE.start_append_one_~item~1#1.base|)))) (select .cse0 (select (select .cse0 |c_~#list~0.base|) (+ |c_~#list~0.offset| 4)))) 0) 0) (forall ((v_ArrVal_1231 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1231) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|) |c_ULTIMATE.start_append_one_~item~1#1.base|)) |c_~#list~0.base|) (+ |c_~#list~0.offset| 4))) 0) 0))) is different from false [2021-12-28 05:50:12,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:50:12,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-12-28 05:50:12,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:50:12,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 30 [2021-12-28 05:50:13,152 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:50:13,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 38 [2021-12-28 05:50:13,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:50:13,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 1076 treesize of output 1077 [2021-12-28 05:50:13,218 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:50:13,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 976 treesize of output 910 [2021-12-28 05:50:13,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:50:13,238 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:50:13,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 922 treesize of output 804