./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext-properties/test-0217_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 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/list-ext-properties/test-0217_1.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 e4aac8fd1b71e0bd84f9ab8e5c238dc6bf3a295fcb9cebe504ba6d0c9a6a7b7a --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 20:54:10,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 20:54:10,611 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 20:54:10,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 20:54:10,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 20:54:10,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 20:54:10,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 20:54:10,668 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 20:54:10,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 20:54:10,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 20:54:10,676 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 20:54:10,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 20:54:10,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 20:54:10,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 20:54:10,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 20:54:10,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 20:54:10,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 20:54:10,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 20:54:10,690 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 20:54:10,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 20:54:10,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 20:54:10,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 20:54:10,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 20:54:10,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 20:54:10,705 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 20:54:10,705 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 20:54:10,706 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 20:54:10,707 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 20:54:10,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 20:54:10,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 20:54:10,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 20:54:10,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 20:54:10,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 20:54:10,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 20:54:10,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 20:54:10,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 20:54:10,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 20:54:10,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 20:54:10,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 20:54:10,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 20:54:10,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 20:54:10,717 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 20:54:10,748 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 20:54:10,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 20:54:10,749 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 20:54:10,750 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 20:54:10,750 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 20:54:10,751 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 20:54:10,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 20:54:10,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 20:54:10,752 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 20:54:10,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 20:54:10,753 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 20:54:10,753 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 20:54:10,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 20:54:10,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 20:54:10,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 20:54:10,754 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 20:54:10,754 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 20:54:10,754 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 20:54:10,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 20:54:10,755 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 20:54:10,755 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 20:54:10,755 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 20:54:10,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 20:54:10,756 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 20:54:10,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 20:54:10,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 20:54:10,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 20:54:10,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 20:54:10,757 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 20:54:10,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 20:54:10,757 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 20:54:10,757 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4aac8fd1b71e0bd84f9ab8e5c238dc6bf3a295fcb9cebe504ba6d0c9a6a7b7a [2021-12-18 20:54:10,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 20:54:11,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 20:54:11,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 20:54:11,024 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 20:54:11,024 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 20:54:11,025 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/test-0217_1.i [2021-12-18 20:54:11,079 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a5c92441/68c61622c0cc4aef9d427468646216ee/FLAG666a6d64c [2021-12-18 20:54:11,554 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 20:54:11,554 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/test-0217_1.i [2021-12-18 20:54:11,580 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a5c92441/68c61622c0cc4aef9d427468646216ee/FLAG666a6d64c [2021-12-18 20:54:11,871 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a5c92441/68c61622c0cc4aef9d427468646216ee [2021-12-18 20:54:11,874 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 20:54:11,875 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 20:54:11,878 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 20:54:11,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 20:54:11,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 20:54:11,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:54:11" (1/1) ... [2021-12-18 20:54:11,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@420d1d94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:54:11, skipping insertion in model container [2021-12-18 20:54:11,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:54:11" (1/1) ... [2021-12-18 20:54:11,888 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 20:54:11,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 20:54:12,298 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 20:54:12,309 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 20:54:12,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 20:54:12,390 INFO L208 MainTranslator]: Completed translation [2021-12-18 20:54:12,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:54:12 WrapperNode [2021-12-18 20:54:12,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 20:54:12,391 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 20:54:12,392 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 20:54:12,392 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 20:54:12,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:54:12" (1/1) ... [2021-12-18 20:54:12,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:54:12" (1/1) ... [2021-12-18 20:54:12,449 INFO L137 Inliner]: procedures = 181, calls = 47, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 257 [2021-12-18 20:54:12,452 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 20:54:12,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 20:54:12,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 20:54:12,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 20:54:12,460 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:54:12" (1/1) ... [2021-12-18 20:54:12,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:54:12" (1/1) ... [2021-12-18 20:54:12,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:54:12" (1/1) ... [2021-12-18 20:54:12,487 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:54:12" (1/1) ... [2021-12-18 20:54:12,501 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:54:12" (1/1) ... [2021-12-18 20:54:12,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:54:12" (1/1) ... [2021-12-18 20:54:12,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:54:12" (1/1) ... [2021-12-18 20:54:12,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 20:54:12,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 20:54:12,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 20:54:12,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 20:54:12,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:54:12" (1/1) ... [2021-12-18 20:54:12,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 20:54:12,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:54:12,552 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) [2021-12-18 20:54:12,576 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 [2021-12-18 20:54:12,589 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2021-12-18 20:54:12,590 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2021-12-18 20:54:12,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 20:54:12,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 20:54:12,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 20:54:12,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 20:54:12,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 20:54:12,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 20:54:12,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 20:54:12,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-18 20:54:12,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 20:54:12,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 20:54:12,716 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 20:54:12,717 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 20:54:13,198 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 20:54:13,205 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 20:54:13,205 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-18 20:54:13,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:54:13 BoogieIcfgContainer [2021-12-18 20:54:13,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 20:54:13,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 20:54:13,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 20:54:13,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 20:54:13,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 08:54:11" (1/3) ... [2021-12-18 20:54:13,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a821f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 08:54:13, skipping insertion in model container [2021-12-18 20:54:13,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:54:12" (2/3) ... [2021-12-18 20:54:13,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a821f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 08:54:13, skipping insertion in model container [2021-12-18 20:54:13,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:54:13" (3/3) ... [2021-12-18 20:54:13,215 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0217_1.i [2021-12-18 20:54:13,219 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 20:54:13,219 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2021-12-18 20:54:13,251 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 20:54:13,256 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 [2021-12-18 20:54:13,256 INFO L340 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2021-12-18 20:54:13,271 INFO L276 IsEmpty]: Start isEmpty. Operand has 174 states, 103 states have (on average 1.9514563106796117) internal successors, (201), 170 states have internal predecessors, (201), 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) [2021-12-18 20:54:13,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-18 20:54:13,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:13,276 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-18 20:54:13,277 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:13,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:13,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1046105098, now seen corresponding path program 1 times [2021-12-18 20:54:13,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:13,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110068356] [2021-12-18 20:54:13,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:13,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:13,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:13,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:13,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110068356] [2021-12-18 20:54:13,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110068356] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:13,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:13,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 20:54:13,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615069771] [2021-12-18 20:54:13,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:13,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-18 20:54:13,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:13,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-18 20:54:13,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-18 20:54:13,417 INFO L87 Difference]: Start difference. First operand has 174 states, 103 states have (on average 1.9514563106796117) internal successors, (201), 170 states have internal predecessors, (201), 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) [2021-12-18 20:54:13,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:13,447 INFO L93 Difference]: Finished difference Result 174 states and 198 transitions. [2021-12-18 20:54:13,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-18 20:54:13,449 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 [2021-12-18 20:54:13,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:13,458 INFO L225 Difference]: With dead ends: 174 [2021-12-18 20:54:13,458 INFO L226 Difference]: Without dead ends: 172 [2021-12-18 20:54:13,460 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 [2021-12-18 20:54:13,463 INFO L933 BasicCegarLoop]: 198 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, 198 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 [2021-12-18 20:54:13,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:54:13,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-12-18 20:54:13,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2021-12-18 20:54:13,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 102 states have (on average 1.8823529411764706) internal successors, (192), 168 states have internal predecessors, (192), 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) [2021-12-18 20:54:13,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 196 transitions. [2021-12-18 20:54:13,511 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 196 transitions. Word has length 6 [2021-12-18 20:54:13,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:13,511 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 196 transitions. [2021-12-18 20:54:13,511 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) [2021-12-18 20:54:13,512 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 196 transitions. [2021-12-18 20:54:13,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 20:54:13,512 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:13,512 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:13,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 20:54:13,512 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:13,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:13,513 INFO L85 PathProgramCache]: Analyzing trace with hash 594388414, now seen corresponding path program 1 times [2021-12-18 20:54:13,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:13,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316313085] [2021-12-18 20:54:13,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:13,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:13,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:13,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:13,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316313085] [2021-12-18 20:54:13,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316313085] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:13,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:13,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 20:54:13,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279058398] [2021-12-18 20:54:13,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:13,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:54:13,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:13,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:54:13,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:54:13,563 INFO L87 Difference]: Start difference. First operand 172 states and 196 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:54:13,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:13,622 INFO L93 Difference]: Finished difference Result 339 states and 387 transitions. [2021-12-18 20:54:13,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:54:13,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-18 20:54:13,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:13,626 INFO L225 Difference]: With dead ends: 339 [2021-12-18 20:54:13,626 INFO L226 Difference]: Without dead ends: 339 [2021-12-18 20:54:13,627 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 [2021-12-18 20:54:13,628 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 185 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:13,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 727 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:54:13,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-12-18 20:54:13,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 174. [2021-12-18 20:54:13,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 104 states have (on average 1.8653846153846154) internal successors, (194), 170 states have internal predecessors, (194), 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) [2021-12-18 20:54:13,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 198 transitions. [2021-12-18 20:54:13,660 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 198 transitions. Word has length 8 [2021-12-18 20:54:13,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:13,661 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 198 transitions. [2021-12-18 20:54:13,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:54:13,662 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 198 transitions. [2021-12-18 20:54:13,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 20:54:13,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:13,665 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:13,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 20:54:13,666 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:13,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:13,667 INFO L85 PathProgramCache]: Analyzing trace with hash 592541372, now seen corresponding path program 1 times [2021-12-18 20:54:13,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:13,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204675294] [2021-12-18 20:54:13,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:13,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:13,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:13,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204675294] [2021-12-18 20:54:13,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204675294] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:13,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:13,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-18 20:54:13,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924408186] [2021-12-18 20:54:13,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:13,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 20:54:13,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:13,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 20:54:13,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:54:13,743 INFO L87 Difference]: Start difference. First operand 174 states and 198 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:54:13,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:13,899 INFO L93 Difference]: Finished difference Result 337 states and 384 transitions. [2021-12-18 20:54:13,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 20:54:13,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-18 20:54:13,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:13,902 INFO L225 Difference]: With dead ends: 337 [2021-12-18 20:54:13,902 INFO L226 Difference]: Without dead ends: 337 [2021-12-18 20:54:13,903 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 [2021-12-18 20:54:13,904 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 176 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:13,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 261 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:13,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-12-18 20:54:13,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 241. [2021-12-18 20:54:13,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 168 states have (on average 1.8571428571428572) internal successors, (312), 234 states have internal predecessors, (312), 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) [2021-12-18 20:54:13,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 320 transitions. [2021-12-18 20:54:13,918 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 320 transitions. Word has length 8 [2021-12-18 20:54:13,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:13,919 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 320 transitions. [2021-12-18 20:54:13,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:54:13,919 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 320 transitions. [2021-12-18 20:54:13,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 20:54:13,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:13,920 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:13,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-18 20:54:13,920 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:13,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:13,921 INFO L85 PathProgramCache]: Analyzing trace with hash 592541373, now seen corresponding path program 1 times [2021-12-18 20:54:13,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:13,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656945202] [2021-12-18 20:54:13,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:13,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:13,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:14,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:14,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:14,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656945202] [2021-12-18 20:54:14,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656945202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:14,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:14,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 20:54:14,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728443297] [2021-12-18 20:54:14,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:14,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:54:14,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:14,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:54:14,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:54:14,017 INFO L87 Difference]: Start difference. First operand 241 states and 320 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:54:14,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:14,182 INFO L93 Difference]: Finished difference Result 392 states and 502 transitions. [2021-12-18 20:54:14,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:54:14,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-18 20:54:14,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:14,185 INFO L225 Difference]: With dead ends: 392 [2021-12-18 20:54:14,185 INFO L226 Difference]: Without dead ends: 392 [2021-12-18 20:54:14,186 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 [2021-12-18 20:54:14,197 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 147 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:14,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 440 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:14,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-12-18 20:54:14,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 326. [2021-12-18 20:54:14,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 247 states have (on average 1.8178137651821862) internal successors, (449), 315 states have internal predecessors, (449), 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) [2021-12-18 20:54:14,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 465 transitions. [2021-12-18 20:54:14,228 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 465 transitions. Word has length 8 [2021-12-18 20:54:14,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:14,228 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 465 transitions. [2021-12-18 20:54:14,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:54:14,229 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 465 transitions. [2021-12-18 20:54:14,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 20:54:14,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:14,229 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:14,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-18 20:54:14,230 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:14,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:14,231 INFO L85 PathProgramCache]: Analyzing trace with hash 592541435, now seen corresponding path program 1 times [2021-12-18 20:54:14,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:14,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508915650] [2021-12-18 20:54:14,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:14,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:14,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:14,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508915650] [2021-12-18 20:54:14,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508915650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:14,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:14,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 20:54:14,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511995189] [2021-12-18 20:54:14,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:14,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:54:14,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:14,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:54:14,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:54:14,330 INFO L87 Difference]: Start difference. First operand 326 states and 465 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:54:14,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:14,502 INFO L93 Difference]: Finished difference Result 391 states and 500 transitions. [2021-12-18 20:54:14,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:54:14,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-18 20:54:14,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:14,504 INFO L225 Difference]: With dead ends: 391 [2021-12-18 20:54:14,505 INFO L226 Difference]: Without dead ends: 391 [2021-12-18 20:54:14,505 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 [2021-12-18 20:54:14,506 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 129 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:14,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 454 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:54:14,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-12-18 20:54:14,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 326. [2021-12-18 20:54:14,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 247 states have (on average 1.8178137651821862) internal successors, (449), 315 states have internal predecessors, (449), 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) [2021-12-18 20:54:14,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 465 transitions. [2021-12-18 20:54:14,517 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 465 transitions. Word has length 8 [2021-12-18 20:54:14,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:14,517 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 465 transitions. [2021-12-18 20:54:14,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:54:14,518 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 465 transitions. [2021-12-18 20:54:14,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 20:54:14,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:14,518 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:14,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-18 20:54:14,519 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:14,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:14,519 INFO L85 PathProgramCache]: Analyzing trace with hash 84699063, now seen corresponding path program 1 times [2021-12-18 20:54:14,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:14,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079786050] [2021-12-18 20:54:14,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:14,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:14,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:14,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:14,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079786050] [2021-12-18 20:54:14,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079786050] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:14,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:14,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:54:14,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471048727] [2021-12-18 20:54:14,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:14,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 20:54:14,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:14,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 20:54:14,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:54:14,548 INFO L87 Difference]: Start difference. First operand 326 states and 465 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) 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) [2021-12-18 20:54:14,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:14,560 INFO L93 Difference]: Finished difference Result 467 states and 621 transitions. [2021-12-18 20:54:14,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 20:54:14,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) 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 [2021-12-18 20:54:14,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:14,563 INFO L225 Difference]: With dead ends: 467 [2021-12-18 20:54:14,563 INFO L226 Difference]: Without dead ends: 467 [2021-12-18 20:54:14,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:54:14,564 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 167 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:14,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 384 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:54:14,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-12-18 20:54:14,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 328. [2021-12-18 20:54:14,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 249 states have (on average 1.8032128514056225) internal successors, (449), 317 states have internal predecessors, (449), 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) [2021-12-18 20:54:14,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 465 transitions. [2021-12-18 20:54:14,573 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 465 transitions. Word has length 11 [2021-12-18 20:54:14,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:14,573 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 465 transitions. [2021-12-18 20:54:14,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) 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) [2021-12-18 20:54:14,574 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 465 transitions. [2021-12-18 20:54:14,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-18 20:54:14,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:14,575 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:14,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-18 20:54:14,575 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:14,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:14,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1669297564, now seen corresponding path program 1 times [2021-12-18 20:54:14,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:14,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980949373] [2021-12-18 20:54:14,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:14,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:14,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:14,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980949373] [2021-12-18 20:54:14,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980949373] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:14,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:14,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 20:54:14,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68694463] [2021-12-18 20:54:14,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:14,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 20:54:14,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:14,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 20:54:14,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:54:14,610 INFO L87 Difference]: Start difference. First operand 328 states and 465 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:54:14,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:14,709 INFO L93 Difference]: Finished difference Result 383 states and 518 transitions. [2021-12-18 20:54:14,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 20:54:14,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-12-18 20:54:14,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:14,712 INFO L225 Difference]: With dead ends: 383 [2021-12-18 20:54:14,712 INFO L226 Difference]: Without dead ends: 376 [2021-12-18 20:54:14,713 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 [2021-12-18 20:54:14,713 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 77 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:14,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 299 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:14,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-12-18 20:54:14,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 325. [2021-12-18 20:54:14,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 246 states have (on average 1.8048780487804879) internal successors, (444), 314 states have internal predecessors, (444), 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) [2021-12-18 20:54:14,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 460 transitions. [2021-12-18 20:54:14,722 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 460 transitions. Word has length 12 [2021-12-18 20:54:14,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:14,722 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 460 transitions. [2021-12-18 20:54:14,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:54:14,723 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 460 transitions. [2021-12-18 20:54:14,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 20:54:14,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:14,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:14,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-18 20:54:14,724 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:14,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:14,724 INFO L85 PathProgramCache]: Analyzing trace with hash 79488163, now seen corresponding path program 1 times [2021-12-18 20:54:14,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:14,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729717361] [2021-12-18 20:54:14,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:14,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:14,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:14,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:14,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729717361] [2021-12-18 20:54:14,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729717361] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:14,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:14,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 20:54:14,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947064209] [2021-12-18 20:54:14,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:14,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:54:14,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:14,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:54:14,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:54:14,759 INFO L87 Difference]: Start difference. First operand 325 states and 460 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2021-12-18 20:54:14,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:14,778 INFO L93 Difference]: Finished difference Result 527 states and 732 transitions. [2021-12-18 20:54:14,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:54:14,778 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 [2021-12-18 20:54:14,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:14,781 INFO L225 Difference]: With dead ends: 527 [2021-12-18 20:54:14,781 INFO L226 Difference]: Without dead ends: 527 [2021-12-18 20:54:14,781 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 [2021-12-18 20:54:14,782 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 181 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:14,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 552 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:54:14,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-12-18 20:54:14,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 329. [2021-12-18 20:54:14,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 250 states have (on average 1.784) internal successors, (446), 318 states have internal predecessors, (446), 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) [2021-12-18 20:54:14,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 462 transitions. [2021-12-18 20:54:14,791 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 462 transitions. Word has length 17 [2021-12-18 20:54:14,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:14,791 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 462 transitions. [2021-12-18 20:54:14,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2021-12-18 20:54:14,791 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 462 transitions. [2021-12-18 20:54:14,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 20:54:14,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:14,792 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:14,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-18 20:54:14,792 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:14,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:14,793 INFO L85 PathProgramCache]: Analyzing trace with hash -621576415, now seen corresponding path program 1 times [2021-12-18 20:54:14,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:14,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590340599] [2021-12-18 20:54:14,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:14,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:14,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:14,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:14,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:14,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:14,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590340599] [2021-12-18 20:54:14,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590340599] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:14,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:14,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:54:14,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915924715] [2021-12-18 20:54:14,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:14,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 20:54:14,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:14,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 20:54:14,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:54:14,824 INFO L87 Difference]: Start difference. First operand 329 states and 462 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2021-12-18 20:54:14,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:14,831 INFO L93 Difference]: Finished difference Result 333 states and 466 transitions. [2021-12-18 20:54:14,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 20:54:14,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 [2021-12-18 20:54:14,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:14,833 INFO L225 Difference]: With dead ends: 333 [2021-12-18 20:54:14,834 INFO L226 Difference]: Without dead ends: 333 [2021-12-18 20:54:14,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:54:14,836 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 0 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:14,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 385 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:54:14,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-12-18 20:54:14,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2021-12-18 20:54:14,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 254 states have (on average 1.7716535433070866) internal successors, (450), 322 states have internal predecessors, (450), 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) [2021-12-18 20:54:14,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 466 transitions. [2021-12-18 20:54:14,844 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 466 transitions. Word has length 17 [2021-12-18 20:54:14,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:14,844 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 466 transitions. [2021-12-18 20:54:14,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2021-12-18 20:54:14,844 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 466 transitions. [2021-12-18 20:54:14,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 20:54:14,845 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:14,845 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:14,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-18 20:54:14,845 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:14,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:14,846 INFO L85 PathProgramCache]: Analyzing trace with hash 187770211, now seen corresponding path program 1 times [2021-12-18 20:54:14,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:14,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084674930] [2021-12-18 20:54:14,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:14,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:14,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:14,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:14,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084674930] [2021-12-18 20:54:14,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084674930] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:14,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:14,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:54:14,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229133061] [2021-12-18 20:54:14,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:14,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:54:14,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:14,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:54:14,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:54:14,898 INFO L87 Difference]: Start difference. First operand 333 states and 466 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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) [2021-12-18 20:54:15,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:15,132 INFO L93 Difference]: Finished difference Result 566 states and 714 transitions. [2021-12-18 20:54:15,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:54:15,133 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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 [2021-12-18 20:54:15,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:15,135 INFO L225 Difference]: With dead ends: 566 [2021-12-18 20:54:15,135 INFO L226 Difference]: Without dead ends: 566 [2021-12-18 20:54:15,136 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 [2021-12-18 20:54:15,136 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 340 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:15,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 458 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:54:15,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-12-18 20:54:15,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 339. [2021-12-18 20:54:15,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 260 states have (on average 1.7538461538461538) internal successors, (456), 328 states have internal predecessors, (456), 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) [2021-12-18 20:54:15,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 472 transitions. [2021-12-18 20:54:15,146 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 472 transitions. Word has length 17 [2021-12-18 20:54:15,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:15,147 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 472 transitions. [2021-12-18 20:54:15,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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) [2021-12-18 20:54:15,147 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 472 transitions. [2021-12-18 20:54:15,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 20:54:15,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:15,148 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:15,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-18 20:54:15,148 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:15,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:15,149 INFO L85 PathProgramCache]: Analyzing trace with hash 187770212, now seen corresponding path program 1 times [2021-12-18 20:54:15,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:15,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723684362] [2021-12-18 20:54:15,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:15,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:15,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:15,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:15,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:15,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723684362] [2021-12-18 20:54:15,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723684362] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:15,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:15,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:54:15,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524662709] [2021-12-18 20:54:15,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:15,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:54:15,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:15,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:54:15,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:54:15,212 INFO L87 Difference]: Start difference. First operand 339 states and 472 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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) [2021-12-18 20:54:15,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:15,381 INFO L93 Difference]: Finished difference Result 386 states and 491 transitions. [2021-12-18 20:54:15,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:54:15,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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 [2021-12-18 20:54:15,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:15,384 INFO L225 Difference]: With dead ends: 386 [2021-12-18 20:54:15,384 INFO L226 Difference]: Without dead ends: 386 [2021-12-18 20:54:15,385 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 [2021-12-18 20:54:15,386 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 184 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:15,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 460 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:15,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-12-18 20:54:15,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 339. [2021-12-18 20:54:15,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 260 states have (on average 1.7307692307692308) internal successors, (450), 328 states have internal predecessors, (450), 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) [2021-12-18 20:54:15,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 466 transitions. [2021-12-18 20:54:15,396 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 466 transitions. Word has length 17 [2021-12-18 20:54:15,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:15,396 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 466 transitions. [2021-12-18 20:54:15,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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) [2021-12-18 20:54:15,397 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 466 transitions. [2021-12-18 20:54:15,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 20:54:15,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:15,399 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:15,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-18 20:54:15,399 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:15,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:15,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1574138016, now seen corresponding path program 1 times [2021-12-18 20:54:15,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:15,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839770419] [2021-12-18 20:54:15,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:15,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:15,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:15,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:15,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:15,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839770419] [2021-12-18 20:54:15,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839770419] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:15,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:15,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 20:54:15,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780763731] [2021-12-18 20:54:15,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:15,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 20:54:15,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:15,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 20:54:15,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:54:15,477 INFO L87 Difference]: Start difference. First operand 339 states and 466 transitions. Second operand has 5 states, 4 states have (on average 4.0) 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) [2021-12-18 20:54:15,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:15,801 INFO L93 Difference]: Finished difference Result 704 states and 839 transitions. [2021-12-18 20:54:15,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 20:54:15,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) 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 [2021-12-18 20:54:15,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:15,804 INFO L225 Difference]: With dead ends: 704 [2021-12-18 20:54:15,804 INFO L226 Difference]: Without dead ends: 704 [2021-12-18 20:54:15,804 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 [2021-12-18 20:54:15,805 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 894 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:15,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 562 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 20:54:15,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-12-18 20:54:15,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 336. [2021-12-18 20:54:15,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 261 states have (on average 1.7011494252873562) internal successors, (444), 325 states have internal predecessors, (444), 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) [2021-12-18 20:54:15,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 460 transitions. [2021-12-18 20:54:15,814 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 460 transitions. Word has length 18 [2021-12-18 20:54:15,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:15,814 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 460 transitions. [2021-12-18 20:54:15,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) 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) [2021-12-18 20:54:15,814 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 460 transitions. [2021-12-18 20:54:15,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 20:54:15,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:15,815 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:15,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-18 20:54:15,815 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:15,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:15,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1574138017, now seen corresponding path program 1 times [2021-12-18 20:54:15,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:15,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093872282] [2021-12-18 20:54:15,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:15,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:15,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:15,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:15,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:15,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093872282] [2021-12-18 20:54:15,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093872282] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:15,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:15,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 20:54:15,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244822948] [2021-12-18 20:54:15,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:15,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 20:54:15,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:15,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 20:54:15,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:54:15,961 INFO L87 Difference]: Start difference. First operand 336 states and 460 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-12-18 20:54:16,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:16,577 INFO L93 Difference]: Finished difference Result 939 states and 1129 transitions. [2021-12-18 20:54:16,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 20:54:16,577 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 [2021-12-18 20:54:16,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:16,581 INFO L225 Difference]: With dead ends: 939 [2021-12-18 20:54:16,581 INFO L226 Difference]: Without dead ends: 939 [2021-12-18 20:54:16,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-12-18 20:54:16,582 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 1931 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1933 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:16,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1933 Valid, 578 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 20:54:16,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-12-18 20:54:16,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 358. [2021-12-18 20:54:16,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 283 states have (on average 1.7031802120141342) internal successors, (482), 347 states have internal predecessors, (482), 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) [2021-12-18 20:54:16,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 498 transitions. [2021-12-18 20:54:16,594 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 498 transitions. Word has length 18 [2021-12-18 20:54:16,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:16,594 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 498 transitions. [2021-12-18 20:54:16,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-12-18 20:54:16,594 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 498 transitions. [2021-12-18 20:54:16,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-18 20:54:16,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:16,595 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:16,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-18 20:54:16,596 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:16,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:16,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1553693859, now seen corresponding path program 1 times [2021-12-18 20:54:16,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:16,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479053051] [2021-12-18 20:54:16,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:16,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:16,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:16,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:16,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:16,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479053051] [2021-12-18 20:54:16,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479053051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:16,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:16,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 20:54:16,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592640811] [2021-12-18 20:54:16,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:16,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 20:54:16,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:16,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 20:54:16,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 20:54:16,661 INFO L87 Difference]: Start difference. First operand 358 states and 498 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-12-18 20:54:16,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:16,690 INFO L93 Difference]: Finished difference Result 391 states and 501 transitions. [2021-12-18 20:54:16,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 20:54:16,695 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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 19 [2021-12-18 20:54:16,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:16,697 INFO L225 Difference]: With dead ends: 391 [2021-12-18 20:54:16,697 INFO L226 Difference]: Without dead ends: 391 [2021-12-18 20:54:16,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-18 20:54:16,698 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 252 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:16,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 1135 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:54:16,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-12-18 20:54:16,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 358. [2021-12-18 20:54:16,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 283 states have (on average 1.696113074204947) internal successors, (480), 347 states have internal predecessors, (480), 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) [2021-12-18 20:54:16,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 496 transitions. [2021-12-18 20:54:16,707 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 496 transitions. Word has length 19 [2021-12-18 20:54:16,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:16,708 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 496 transitions. [2021-12-18 20:54:16,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-12-18 20:54:16,708 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 496 transitions. [2021-12-18 20:54:16,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-18 20:54:16,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:16,709 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:16,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-18 20:54:16,709 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:16,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:16,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1553695781, now seen corresponding path program 1 times [2021-12-18 20:54:16,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:16,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344852097] [2021-12-18 20:54:16,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:16,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:16,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:16,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:16,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:16,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344852097] [2021-12-18 20:54:16,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344852097] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:16,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:16,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 20:54:16,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738428894] [2021-12-18 20:54:16,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:16,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 20:54:16,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:16,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 20:54:16,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:54:16,819 INFO L87 Difference]: Start difference. First operand 358 states and 496 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-12-18 20:54:17,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:17,299 INFO L93 Difference]: Finished difference Result 708 states and 876 transitions. [2021-12-18 20:54:17,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 20:54:17,300 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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 19 [2021-12-18 20:54:17,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:17,302 INFO L225 Difference]: With dead ends: 708 [2021-12-18 20:54:17,302 INFO L226 Difference]: Without dead ends: 708 [2021-12-18 20:54:17,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-18 20:54:17,303 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 904 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:17,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [908 Valid, 732 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 20:54:17,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-12-18 20:54:17,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 356. [2021-12-18 20:54:17,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 281 states have (on average 1.697508896797153) internal successors, (477), 345 states have internal predecessors, (477), 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) [2021-12-18 20:54:17,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 493 transitions. [2021-12-18 20:54:17,313 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 493 transitions. Word has length 19 [2021-12-18 20:54:17,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:17,313 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 493 transitions. [2021-12-18 20:54:17,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-12-18 20:54:17,314 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 493 transitions. [2021-12-18 20:54:17,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-18 20:54:17,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:17,314 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] [2021-12-18 20:54:17,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-18 20:54:17,315 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:17,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:17,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1870398950, now seen corresponding path program 1 times [2021-12-18 20:54:17,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:17,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153646058] [2021-12-18 20:54:17,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:17,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:17,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:17,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:17,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:17,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:17,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153646058] [2021-12-18 20:54:17,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153646058] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:17,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:17,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 20:54:17,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437050211] [2021-12-18 20:54:17,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:17,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 20:54:17,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:17,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 20:54:17,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-18 20:54:17,491 INFO L87 Difference]: Start difference. First operand 356 states and 493 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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) [2021-12-18 20:54:17,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:17,785 INFO L93 Difference]: Finished difference Result 542 states and 718 transitions. [2021-12-18 20:54:17,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 20:54:17,791 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 [2021-12-18 20:54:17,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:17,792 INFO L225 Difference]: With dead ends: 542 [2021-12-18 20:54:17,793 INFO L226 Difference]: Without dead ends: 542 [2021-12-18 20:54:17,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-12-18 20:54:17,793 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 180 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:17,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 1139 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:54:17,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-12-18 20:54:17,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 415. [2021-12-18 20:54:17,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 337 states have (on average 1.6646884272997033) internal successors, (561), 400 states have internal predecessors, (561), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-18 20:54:17,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 581 transitions. [2021-12-18 20:54:17,803 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 581 transitions. Word has length 22 [2021-12-18 20:54:17,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:17,803 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 581 transitions. [2021-12-18 20:54:17,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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) [2021-12-18 20:54:17,803 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 581 transitions. [2021-12-18 20:54:17,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-18 20:54:17,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:17,804 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] [2021-12-18 20:54:17,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-18 20:54:17,804 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:17,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:17,805 INFO L85 PathProgramCache]: Analyzing trace with hash -189481273, now seen corresponding path program 1 times [2021-12-18 20:54:17,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:17,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692305590] [2021-12-18 20:54:17,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:17,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:17,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:18,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:18,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:18,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:18,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692305590] [2021-12-18 20:54:18,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692305590] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:18,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:18,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 20:54:18,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456768491] [2021-12-18 20:54:18,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:18,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 20:54:18,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:18,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 20:54:18,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-18 20:54:18,067 INFO L87 Difference]: Start difference. First operand 415 states and 581 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2021-12-18 20:54:18,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:18,684 INFO L93 Difference]: Finished difference Result 766 states and 1040 transitions. [2021-12-18 20:54:18,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 20:54:18,685 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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 [2021-12-18 20:54:18,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:18,687 INFO L225 Difference]: With dead ends: 766 [2021-12-18 20:54:18,687 INFO L226 Difference]: Without dead ends: 764 [2021-12-18 20:54:18,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-12-18 20:54:18,688 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 544 mSDsluCounter, 1400 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1671 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:18,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 1671 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 20:54:18,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-12-18 20:54:18,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 409. [2021-12-18 20:54:18,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 331 states have (on average 1.661631419939577) internal successors, (550), 394 states have internal predecessors, (550), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-18 20:54:18,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 570 transitions. [2021-12-18 20:54:18,697 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 570 transitions. Word has length 23 [2021-12-18 20:54:18,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:18,698 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 570 transitions. [2021-12-18 20:54:18,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2021-12-18 20:54:18,698 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 570 transitions. [2021-12-18 20:54:18,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-18 20:54:18,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:18,699 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] [2021-12-18 20:54:18,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-18 20:54:18,699 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:18,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:18,700 INFO L85 PathProgramCache]: Analyzing trace with hash -582568086, now seen corresponding path program 1 times [2021-12-18 20:54:18,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:18,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593987874] [2021-12-18 20:54:18,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:18,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:18,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:18,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:18,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593987874] [2021-12-18 20:54:18,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593987874] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:18,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:18,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 20:54:18,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88508677] [2021-12-18 20:54:18,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:18,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 20:54:18,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:18,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 20:54:18,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 20:54:18,750 INFO L87 Difference]: Start difference. First operand 409 states and 570 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2021-12-18 20:54:18,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:18,775 INFO L93 Difference]: Finished difference Result 438 states and 567 transitions. [2021-12-18 20:54:18,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 20:54:18,775 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 [2021-12-18 20:54:18,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:18,777 INFO L225 Difference]: With dead ends: 438 [2021-12-18 20:54:18,777 INFO L226 Difference]: Without dead ends: 438 [2021-12-18 20:54:18,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-18 20:54:18,778 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 249 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:18,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 1131 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:54:18,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-12-18 20:54:18,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 407. [2021-12-18 20:54:18,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 329 states have (on average 1.6534954407294833) internal successors, (544), 392 states have internal predecessors, (544), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-18 20:54:18,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 564 transitions. [2021-12-18 20:54:18,785 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 564 transitions. Word has length 23 [2021-12-18 20:54:18,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:18,786 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 564 transitions. [2021-12-18 20:54:18,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2021-12-18 20:54:18,786 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 564 transitions. [2021-12-18 20:54:18,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-18 20:54:18,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:18,787 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] [2021-12-18 20:54:18,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-18 20:54:18,787 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:18,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:18,787 INFO L85 PathProgramCache]: Analyzing trace with hash -2129210531, now seen corresponding path program 1 times [2021-12-18 20:54:18,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:18,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081979097] [2021-12-18 20:54:18,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:18,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:18,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:18,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:18,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:18,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081979097] [2021-12-18 20:54:18,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081979097] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:18,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:18,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 20:54:18,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420548498] [2021-12-18 20:54:18,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:18,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 20:54:18,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:18,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 20:54:18,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:54:18,809 INFO L87 Difference]: Start difference. First operand 407 states and 564 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-12-18 20:54:18,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:18,911 INFO L93 Difference]: Finished difference Result 499 states and 664 transitions. [2021-12-18 20:54:18,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 20:54:18,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 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 24 [2021-12-18 20:54:18,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:18,913 INFO L225 Difference]: With dead ends: 499 [2021-12-18 20:54:18,913 INFO L226 Difference]: Without dead ends: 499 [2021-12-18 20:54:18,913 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 [2021-12-18 20:54:18,914 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 156 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:18,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 291 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:18,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-12-18 20:54:18,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 404. [2021-12-18 20:54:18,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 329 states have (on average 1.6261398176291793) internal successors, (535), 389 states have internal predecessors, (535), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-18 20:54:18,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 555 transitions. [2021-12-18 20:54:18,921 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 555 transitions. Word has length 24 [2021-12-18 20:54:18,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:18,922 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 555 transitions. [2021-12-18 20:54:18,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-12-18 20:54:18,922 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 555 transitions. [2021-12-18 20:54:18,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-18 20:54:18,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:18,923 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] [2021-12-18 20:54:18,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-18 20:54:18,923 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:18,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:18,923 INFO L85 PathProgramCache]: Analyzing trace with hash -2129210530, now seen corresponding path program 1 times [2021-12-18 20:54:18,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:18,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13633669] [2021-12-18 20:54:18,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:18,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:18,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:18,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:18,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:18,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13633669] [2021-12-18 20:54:18,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13633669] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:18,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:18,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:54:18,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895663329] [2021-12-18 20:54:18,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:18,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:54:18,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:18,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:54:18,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:54:18,965 INFO L87 Difference]: Start difference. First operand 404 states and 555 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-12-18 20:54:19,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:19,056 INFO L93 Difference]: Finished difference Result 433 states and 552 transitions. [2021-12-18 20:54:19,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:54:19,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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 24 [2021-12-18 20:54:19,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:19,058 INFO L225 Difference]: With dead ends: 433 [2021-12-18 20:54:19,058 INFO L226 Difference]: Without dead ends: 433 [2021-12-18 20:54:19,058 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 [2021-12-18 20:54:19,059 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 338 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:19,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 300 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:19,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-12-18 20:54:19,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 402. [2021-12-18 20:54:19,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 329 states have (on average 1.6079027355623101) internal successors, (529), 387 states have internal predecessors, (529), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-18 20:54:19,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 549 transitions. [2021-12-18 20:54:19,070 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 549 transitions. Word has length 24 [2021-12-18 20:54:19,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:19,070 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 549 transitions. [2021-12-18 20:54:19,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-12-18 20:54:19,070 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 549 transitions. [2021-12-18 20:54:19,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 20:54:19,071 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:19,072 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] [2021-12-18 20:54:19,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-18 20:54:19,072 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:19,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:19,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1695234990, now seen corresponding path program 1 times [2021-12-18 20:54:19,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:19,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343662088] [2021-12-18 20:54:19,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:19,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:19,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:19,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:19,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343662088] [2021-12-18 20:54:19,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343662088] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:19,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:19,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:54:19,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451646010] [2021-12-18 20:54:19,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:19,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:54:19,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:19,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:54:19,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:54:19,117 INFO L87 Difference]: Start difference. First operand 402 states and 549 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) [2021-12-18 20:54:19,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:19,312 INFO L93 Difference]: Finished difference Result 635 states and 810 transitions. [2021-12-18 20:54:19,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:54:19,313 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 [2021-12-18 20:54:19,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:19,315 INFO L225 Difference]: With dead ends: 635 [2021-12-18 20:54:19,315 INFO L226 Difference]: Without dead ends: 635 [2021-12-18 20:54:19,315 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 [2021-12-18 20:54:19,316 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 298 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:19,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 446 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:54:19,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-12-18 20:54:19,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 430. [2021-12-18 20:54:19,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 357 states have (on average 1.6274509803921569) internal successors, (581), 415 states have internal predecessors, (581), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-18 20:54:19,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 601 transitions. [2021-12-18 20:54:19,324 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 601 transitions. Word has length 25 [2021-12-18 20:54:19,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:19,324 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 601 transitions. [2021-12-18 20:54:19,324 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) [2021-12-18 20:54:19,325 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 601 transitions. [2021-12-18 20:54:19,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 20:54:19,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:19,325 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] [2021-12-18 20:54:19,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-18 20:54:19,325 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:19,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:19,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1695234989, now seen corresponding path program 1 times [2021-12-18 20:54:19,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:19,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774685790] [2021-12-18 20:54:19,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:19,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:19,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:19,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:19,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:19,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:19,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774685790] [2021-12-18 20:54:19,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774685790] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:19,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:19,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 20:54:19,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225930157] [2021-12-18 20:54:19,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:19,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 20:54:19,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:19,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 20:54:19,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-18 20:54:19,430 INFO L87 Difference]: Start difference. First operand 430 states and 601 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 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) [2021-12-18 20:54:19,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:19,659 INFO L93 Difference]: Finished difference Result 473 states and 616 transitions. [2021-12-18 20:54:19,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 20:54:19,660 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 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 [2021-12-18 20:54:19,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:19,661 INFO L225 Difference]: With dead ends: 473 [2021-12-18 20:54:19,661 INFO L226 Difference]: Without dead ends: 473 [2021-12-18 20:54:19,661 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 [2021-12-18 20:54:19,662 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 345 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:19,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 538 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:54:19,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-12-18 20:54:19,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 430. [2021-12-18 20:54:19,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 357 states have (on average 1.6022408963585435) internal successors, (572), 415 states have internal predecessors, (572), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-18 20:54:19,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 592 transitions. [2021-12-18 20:54:19,669 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 592 transitions. Word has length 25 [2021-12-18 20:54:19,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:19,669 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 592 transitions. [2021-12-18 20:54:19,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 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) [2021-12-18 20:54:19,670 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 592 transitions. [2021-12-18 20:54:19,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-18 20:54:19,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:19,670 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] [2021-12-18 20:54:19,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-18 20:54:19,670 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:19,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:19,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1766884672, now seen corresponding path program 1 times [2021-12-18 20:54:19,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:19,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181933132] [2021-12-18 20:54:19,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:19,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:19,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:19,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:19,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181933132] [2021-12-18 20:54:19,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181933132] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:19,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:19,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:54:19,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506291946] [2021-12-18 20:54:19,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:19,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:54:19,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:19,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:54:19,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:54:19,715 INFO L87 Difference]: Start difference. First operand 430 states and 592 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) [2021-12-18 20:54:19,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:19,805 INFO L93 Difference]: Finished difference Result 457 states and 592 transitions. [2021-12-18 20:54:19,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:54:19,805 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 [2021-12-18 20:54:19,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:19,807 INFO L225 Difference]: With dead ends: 457 [2021-12-18 20:54:19,807 INFO L226 Difference]: Without dead ends: 457 [2021-12-18 20:54:19,807 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 [2021-12-18 20:54:19,808 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 172 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:19,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 380 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:19,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-12-18 20:54:19,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 429. [2021-12-18 20:54:19,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 357 states have (on average 1.5938375350140057) internal successors, (569), 414 states have internal predecessors, (569), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-18 20:54:19,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 589 transitions. [2021-12-18 20:54:19,815 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 589 transitions. Word has length 26 [2021-12-18 20:54:19,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:19,815 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 589 transitions. [2021-12-18 20:54:19,815 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) [2021-12-18 20:54:19,815 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 589 transitions. [2021-12-18 20:54:19,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-18 20:54:19,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:19,816 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] [2021-12-18 20:54:19,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-18 20:54:19,816 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:19,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:19,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1766884865, now seen corresponding path program 1 times [2021-12-18 20:54:19,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:19,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374134794] [2021-12-18 20:54:19,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:19,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:19,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:19,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:19,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:19,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:19,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374134794] [2021-12-18 20:54:19,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374134794] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:19,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:19,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 20:54:19,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881848748] [2021-12-18 20:54:19,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:19,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 20:54:19,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:19,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 20:54:19,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:54:19,884 INFO L87 Difference]: Start difference. First operand 429 states and 589 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2021-12-18 20:54:20,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:20,031 INFO L93 Difference]: Finished difference Result 649 states and 872 transitions. [2021-12-18 20:54:20,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 20:54:20,032 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 [2021-12-18 20:54:20,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:20,034 INFO L225 Difference]: With dead ends: 649 [2021-12-18 20:54:20,034 INFO L226 Difference]: Without dead ends: 649 [2021-12-18 20:54:20,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-18 20:54:20,035 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 165 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:20,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 1098 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:20,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-12-18 20:54:20,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 459. [2021-12-18 20:54:20,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 387 states have (on average 1.5607235142118863) internal successors, (604), 444 states have internal predecessors, (604), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-18 20:54:20,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 624 transitions. [2021-12-18 20:54:20,043 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 624 transitions. Word has length 26 [2021-12-18 20:54:20,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:20,043 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 624 transitions. [2021-12-18 20:54:20,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2021-12-18 20:54:20,044 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 624 transitions. [2021-12-18 20:54:20,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-18 20:54:20,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:20,044 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] [2021-12-18 20:54:20,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-18 20:54:20,044 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:20,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:20,045 INFO L85 PathProgramCache]: Analyzing trace with hash -808600231, now seen corresponding path program 1 times [2021-12-18 20:54:20,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:20,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153808147] [2021-12-18 20:54:20,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:20,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:20,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:20,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:20,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:20,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153808147] [2021-12-18 20:54:20,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153808147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:20,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:20,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 20:54:20,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069034987] [2021-12-18 20:54:20,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:20,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 20:54:20,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:20,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 20:54:20,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:54:20,102 INFO L87 Difference]: Start difference. First operand 459 states and 624 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 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) [2021-12-18 20:54:20,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:20,238 INFO L93 Difference]: Finished difference Result 530 states and 691 transitions. [2021-12-18 20:54:20,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 20:54:20,238 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 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 29 [2021-12-18 20:54:20,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:20,240 INFO L225 Difference]: With dead ends: 530 [2021-12-18 20:54:20,240 INFO L226 Difference]: Without dead ends: 530 [2021-12-18 20:54:20,240 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 [2021-12-18 20:54:20,241 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 168 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:20,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 676 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:20,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-12-18 20:54:20,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 459. [2021-12-18 20:54:20,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 387 states have (on average 1.558139534883721) internal successors, (603), 444 states have internal predecessors, (603), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-18 20:54:20,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 623 transitions. [2021-12-18 20:54:20,269 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 623 transitions. Word has length 29 [2021-12-18 20:54:20,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:20,269 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 623 transitions. [2021-12-18 20:54:20,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 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) [2021-12-18 20:54:20,269 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 623 transitions. [2021-12-18 20:54:20,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-18 20:54:20,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:20,270 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] [2021-12-18 20:54:20,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-18 20:54:20,270 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:20,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:20,271 INFO L85 PathProgramCache]: Analyzing trace with hash 703196873, now seen corresponding path program 1 times [2021-12-18 20:54:20,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:20,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087911531] [2021-12-18 20:54:20,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:20,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:20,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:20,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:20,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087911531] [2021-12-18 20:54:20,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087911531] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:20,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:20,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 20:54:20,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345470765] [2021-12-18 20:54:20,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:20,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 20:54:20,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:20,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 20:54:20,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:54:20,362 INFO L87 Difference]: Start difference. First operand 459 states and 623 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 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) [2021-12-18 20:54:20,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:20,517 INFO L93 Difference]: Finished difference Result 595 states and 780 transitions. [2021-12-18 20:54:20,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 20:54:20,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 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 [2021-12-18 20:54:20,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:20,520 INFO L225 Difference]: With dead ends: 595 [2021-12-18 20:54:20,520 INFO L226 Difference]: Without dead ends: 595 [2021-12-18 20:54:20,521 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 [2021-12-18 20:54:20,521 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 199 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 667 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 [2021-12-18 20:54:20,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 667 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:20,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-12-18 20:54:20,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 500. [2021-12-18 20:54:20,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 425 states have (on average 1.5482352941176472) internal successors, (658), 483 states have internal predecessors, (658), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-18 20:54:20,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 682 transitions. [2021-12-18 20:54:20,533 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 682 transitions. Word has length 30 [2021-12-18 20:54:20,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:20,533 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 682 transitions. [2021-12-18 20:54:20,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 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) [2021-12-18 20:54:20,534 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 682 transitions. [2021-12-18 20:54:20,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-18 20:54:20,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:20,534 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] [2021-12-18 20:54:20,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-18 20:54:20,535 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:20,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:20,535 INFO L85 PathProgramCache]: Analyzing trace with hash 2144668882, now seen corresponding path program 1 times [2021-12-18 20:54:20,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:20,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553450682] [2021-12-18 20:54:20,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:20,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:20,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:20,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:20,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553450682] [2021-12-18 20:54:20,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553450682] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:20,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:20,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 20:54:20,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535280693] [2021-12-18 20:54:20,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:20,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 20:54:20,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:20,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 20:54:20,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:54:20,618 INFO L87 Difference]: Start difference. First operand 500 states and 682 transitions. Second operand has 7 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) [2021-12-18 20:54:20,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:20,839 INFO L93 Difference]: Finished difference Result 855 states and 1109 transitions. [2021-12-18 20:54:20,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 20:54:20,840 INFO L78 Accepts]: Start accepts. Automaton has has 7 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 [2021-12-18 20:54:20,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:20,843 INFO L225 Difference]: With dead ends: 855 [2021-12-18 20:54:20,843 INFO L226 Difference]: Without dead ends: 855 [2021-12-18 20:54:20,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-18 20:54:20,843 INFO L933 BasicCegarLoop]: 337 mSDtfsCounter, 514 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:20,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 1525 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:54:20,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-12-18 20:54:20,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 497. [2021-12-18 20:54:20,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 425 states have (on average 1.5058823529411764) internal successors, (640), 480 states have internal predecessors, (640), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-18 20:54:20,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 664 transitions. [2021-12-18 20:54:20,856 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 664 transitions. Word has length 32 [2021-12-18 20:54:20,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:20,856 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 664 transitions. [2021-12-18 20:54:20,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 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) [2021-12-18 20:54:20,856 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 664 transitions. [2021-12-18 20:54:20,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-18 20:54:20,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:20,857 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] [2021-12-18 20:54:20,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-18 20:54:20,857 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:20,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:20,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1462337803, now seen corresponding path program 1 times [2021-12-18 20:54:20,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:20,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721263570] [2021-12-18 20:54:20,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:20,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:20,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:20,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:20,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:20,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:20,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721263570] [2021-12-18 20:54:20,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721263570] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:20,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:20,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 20:54:20,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880723710] [2021-12-18 20:54:20,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:20,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 20:54:20,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:20,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 20:54:20,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 20:54:20,961 INFO L87 Difference]: Start difference. First operand 497 states and 664 transitions. Second operand has 6 states, 5 states have (on average 6.0) 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) [2021-12-18 20:54:21,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:21,425 INFO L93 Difference]: Finished difference Result 877 states and 1128 transitions. [2021-12-18 20:54:21,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 20:54:21,425 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) 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 [2021-12-18 20:54:21,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:21,428 INFO L225 Difference]: With dead ends: 877 [2021-12-18 20:54:21,428 INFO L226 Difference]: Without dead ends: 877 [2021-12-18 20:54:21,428 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 [2021-12-18 20:54:21,429 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 428 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:21,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 1076 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 20:54:21,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-12-18 20:54:21,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 534. [2021-12-18 20:54:21,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 459 states have (on average 1.4880174291938997) internal successors, (683), 515 states have internal predecessors, (683), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-18 20:54:21,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 711 transitions. [2021-12-18 20:54:21,439 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 711 transitions. Word has length 32 [2021-12-18 20:54:21,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:21,439 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 711 transitions. [2021-12-18 20:54:21,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) 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) [2021-12-18 20:54:21,439 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 711 transitions. [2021-12-18 20:54:21,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-18 20:54:21,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:21,439 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] [2021-12-18 20:54:21,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-18 20:54:21,440 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:21,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:21,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1912168099, now seen corresponding path program 1 times [2021-12-18 20:54:21,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:21,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038147550] [2021-12-18 20:54:21,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:21,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:21,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:21,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:21,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:21,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038147550] [2021-12-18 20:54:21,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038147550] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:21,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:21,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 20:54:21,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127411605] [2021-12-18 20:54:21,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:21,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 20:54:21,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:21,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 20:54:21,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:54:21,566 INFO L87 Difference]: Start difference. First operand 534 states and 711 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 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) [2021-12-18 20:54:21,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:21,912 INFO L93 Difference]: Finished difference Result 771 states and 979 transitions. [2021-12-18 20:54:21,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 20:54:21,914 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 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 [2021-12-18 20:54:21,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:21,916 INFO L225 Difference]: With dead ends: 771 [2021-12-18 20:54:21,916 INFO L226 Difference]: Without dead ends: 771 [2021-12-18 20:54:21,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-12-18 20:54:21,917 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 478 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:21,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 781 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:54:21,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-12-18 20:54:21,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 534. [2021-12-18 20:54:21,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 459 states have (on average 1.4793028322440087) internal successors, (679), 515 states have internal predecessors, (679), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-18 20:54:21,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 707 transitions. [2021-12-18 20:54:21,926 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 707 transitions. Word has length 33 [2021-12-18 20:54:21,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:21,926 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 707 transitions. [2021-12-18 20:54:21,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 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) [2021-12-18 20:54:21,927 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 707 transitions. [2021-12-18 20:54:21,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-18 20:54:21,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:21,927 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] [2021-12-18 20:54:21,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-18 20:54:21,927 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:21,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:21,928 INFO L85 PathProgramCache]: Analyzing trace with hash -557500014, now seen corresponding path program 1 times [2021-12-18 20:54:21,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:21,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584238929] [2021-12-18 20:54:21,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:21,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:21,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:22,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:22,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:22,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:22,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584238929] [2021-12-18 20:54:22,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584238929] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:22,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:22,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 20:54:22,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435078655] [2021-12-18 20:54:22,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:22,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 20:54:22,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:22,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 20:54:22,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 20:54:22,091 INFO L87 Difference]: Start difference. First operand 534 states and 707 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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) [2021-12-18 20:54:22,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:22,282 INFO L93 Difference]: Finished difference Result 579 states and 753 transitions. [2021-12-18 20:54:22,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 20:54:22,284 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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 34 [2021-12-18 20:54:22,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:22,286 INFO L225 Difference]: With dead ends: 579 [2021-12-18 20:54:22,286 INFO L226 Difference]: Without dead ends: 579 [2021-12-18 20:54:22,286 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 [2021-12-18 20:54:22,287 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 111 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:22,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 851 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:22,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-12-18 20:54:22,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 534. [2021-12-18 20:54:22,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 459 states have (on average 1.477124183006536) internal successors, (678), 515 states have internal predecessors, (678), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-18 20:54:22,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 706 transitions. [2021-12-18 20:54:22,296 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 706 transitions. Word has length 34 [2021-12-18 20:54:22,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:22,297 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 706 transitions. [2021-12-18 20:54:22,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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) [2021-12-18 20:54:22,297 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 706 transitions. [2021-12-18 20:54:22,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-18 20:54:22,297 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:22,297 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] [2021-12-18 20:54:22,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-18 20:54:22,298 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:22,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:22,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1394937876, now seen corresponding path program 1 times [2021-12-18 20:54:22,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:22,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959263833] [2021-12-18 20:54:22,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:22,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:22,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:22,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:22,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959263833] [2021-12-18 20:54:22,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959263833] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:22,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:22,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 20:54:22,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861109506] [2021-12-18 20:54:22,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:22,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 20:54:22,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:22,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 20:54:22,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 20:54:22,359 INFO L87 Difference]: Start difference. First operand 534 states and 706 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 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) [2021-12-18 20:54:22,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:22,537 INFO L93 Difference]: Finished difference Result 625 states and 808 transitions. [2021-12-18 20:54:22,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 20:54:22,537 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 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 34 [2021-12-18 20:54:22,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:22,539 INFO L225 Difference]: With dead ends: 625 [2021-12-18 20:54:22,539 INFO L226 Difference]: Without dead ends: 625 [2021-12-18 20:54:22,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-18 20:54:22,539 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 493 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:22,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 579 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:22,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-12-18 20:54:22,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 533. [2021-12-18 20:54:22,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 459 states have (on average 1.4727668845315904) internal successors, (676), 514 states have internal predecessors, (676), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-18 20:54:22,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 704 transitions. [2021-12-18 20:54:22,548 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 704 transitions. Word has length 34 [2021-12-18 20:54:22,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:22,549 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 704 transitions. [2021-12-18 20:54:22,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 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) [2021-12-18 20:54:22,549 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 704 transitions. [2021-12-18 20:54:22,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-18 20:54:22,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:22,550 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] [2021-12-18 20:54:22,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-18 20:54:22,550 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:22,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:22,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1394937875, now seen corresponding path program 1 times [2021-12-18 20:54:22,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:22,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399896611] [2021-12-18 20:54:22,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:22,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:22,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:22,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:22,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:22,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:22,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399896611] [2021-12-18 20:54:22,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399896611] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:22,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:22,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 20:54:22,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346262110] [2021-12-18 20:54:22,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:22,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 20:54:22,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:22,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 20:54:22,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 20:54:22,616 INFO L87 Difference]: Start difference. First operand 533 states and 704 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 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) [2021-12-18 20:54:22,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:22,767 INFO L93 Difference]: Finished difference Result 557 states and 705 transitions. [2021-12-18 20:54:22,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 20:54:22,768 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 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 34 [2021-12-18 20:54:22,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:22,770 INFO L225 Difference]: With dead ends: 557 [2021-12-18 20:54:22,770 INFO L226 Difference]: Without dead ends: 557 [2021-12-18 20:54:22,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-18 20:54:22,770 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 523 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:22,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 592 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:22,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-12-18 20:54:22,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 532. [2021-12-18 20:54:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 459 states have (on average 1.4684095860566448) internal successors, (674), 513 states have internal predecessors, (674), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-18 20:54:22,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 702 transitions. [2021-12-18 20:54:22,785 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 702 transitions. Word has length 34 [2021-12-18 20:54:22,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:22,785 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 702 transitions. [2021-12-18 20:54:22,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 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) [2021-12-18 20:54:22,785 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 702 transitions. [2021-12-18 20:54:22,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-18 20:54:22,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:22,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:22,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-18 20:54:22,786 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:22,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:22,787 INFO L85 PathProgramCache]: Analyzing trace with hash -505498803, now seen corresponding path program 1 times [2021-12-18 20:54:22,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:22,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375562126] [2021-12-18 20:54:22,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:22,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:22,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:22,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:22,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375562126] [2021-12-18 20:54:22,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375562126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:22,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:22,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 20:54:22,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471545596] [2021-12-18 20:54:22,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:22,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 20:54:22,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:22,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 20:54:22,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:54:22,829 INFO L87 Difference]: Start difference. First operand 532 states and 702 transitions. Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 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) [2021-12-18 20:54:23,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:23,036 INFO L93 Difference]: Finished difference Result 926 states and 1168 transitions. [2021-12-18 20:54:23,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 20:54:23,036 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 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 36 [2021-12-18 20:54:23,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:23,039 INFO L225 Difference]: With dead ends: 926 [2021-12-18 20:54:23,039 INFO L226 Difference]: Without dead ends: 926 [2021-12-18 20:54:23,039 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 [2021-12-18 20:54:23,040 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 531 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:23,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 653 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:54:23,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-12-18 20:54:23,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 529. [2021-12-18 20:54:23,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 459 states have (on average 1.4553376906318083) internal successors, (668), 510 states have internal predecessors, (668), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-18 20:54:23,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 696 transitions. [2021-12-18 20:54:23,063 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 696 transitions. Word has length 36 [2021-12-18 20:54:23,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:23,064 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 696 transitions. [2021-12-18 20:54:23,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 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) [2021-12-18 20:54:23,065 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 696 transitions. [2021-12-18 20:54:23,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-18 20:54:23,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:23,065 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:23,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-18 20:54:23,066 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:23,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:23,066 INFO L85 PathProgramCache]: Analyzing trace with hash -505498802, now seen corresponding path program 1 times [2021-12-18 20:54:23,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:23,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352952085] [2021-12-18 20:54:23,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:23,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:23,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:23,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:23,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352952085] [2021-12-18 20:54:23,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352952085] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:23,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:23,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 20:54:23,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299111853] [2021-12-18 20:54:23,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:23,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 20:54:23,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:23,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 20:54:23,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:54:23,175 INFO L87 Difference]: Start difference. First operand 529 states and 696 transitions. Second operand has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 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) [2021-12-18 20:54:23,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:23,433 INFO L93 Difference]: Finished difference Result 761 states and 954 transitions. [2021-12-18 20:54:23,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 20:54:23,433 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 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 36 [2021-12-18 20:54:23,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:23,435 INFO L225 Difference]: With dead ends: 761 [2021-12-18 20:54:23,435 INFO L226 Difference]: Without dead ends: 761 [2021-12-18 20:54:23,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-12-18 20:54:23,436 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 560 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:23,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 1199 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:54:23,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-12-18 20:54:23,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 559. [2021-12-18 20:54:23,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 490 states have (on average 1.4489795918367347) internal successors, (710), 540 states have internal predecessors, (710), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-18 20:54:23,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 738 transitions. [2021-12-18 20:54:23,445 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 738 transitions. Word has length 36 [2021-12-18 20:54:23,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:23,446 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 738 transitions. [2021-12-18 20:54:23,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 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) [2021-12-18 20:54:23,446 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 738 transitions. [2021-12-18 20:54:23,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-18 20:54:23,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:23,446 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:54:23,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-18 20:54:23,447 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:23,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:23,447 INFO L85 PathProgramCache]: Analyzing trace with hash -505498641, now seen corresponding path program 1 times [2021-12-18 20:54:23,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:23,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688691429] [2021-12-18 20:54:23,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:23,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:23,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:23,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:23,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:23,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688691429] [2021-12-18 20:54:23,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688691429] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:23,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:23,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 20:54:23,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276875489] [2021-12-18 20:54:23,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:23,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 20:54:23,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:23,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 20:54:23,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-18 20:54:23,624 INFO L87 Difference]: Start difference. First operand 559 states and 738 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 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) [2021-12-18 20:54:24,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:24,219 INFO L93 Difference]: Finished difference Result 913 states and 1102 transitions. [2021-12-18 20:54:24,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 20:54:24,220 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 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 36 [2021-12-18 20:54:24,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:24,222 INFO L225 Difference]: With dead ends: 913 [2021-12-18 20:54:24,222 INFO L226 Difference]: Without dead ends: 913 [2021-12-18 20:54:24,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-12-18 20:54:24,222 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 769 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:24,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 1232 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 20:54:24,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-12-18 20:54:24,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 559. [2021-12-18 20:54:24,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 490 states have (on average 1.4448979591836735) internal successors, (708), 540 states have internal predecessors, (708), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-18 20:54:24,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 736 transitions. [2021-12-18 20:54:24,232 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 736 transitions. Word has length 36 [2021-12-18 20:54:24,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:24,232 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 736 transitions. [2021-12-18 20:54:24,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 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) [2021-12-18 20:54:24,232 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 736 transitions. [2021-12-18 20:54:24,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-18 20:54:24,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:24,233 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, 1, 1, 1] [2021-12-18 20:54:24,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-18 20:54:24,233 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:24,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:24,234 INFO L85 PathProgramCache]: Analyzing trace with hash -2111288145, now seen corresponding path program 1 times [2021-12-18 20:54:24,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:24,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230686384] [2021-12-18 20:54:24,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:24,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:24,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:24,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:24,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:24,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-18 20:54:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:24,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:54:24,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:24,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230686384] [2021-12-18 20:54:24,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230686384] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:54:24,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428293540] [2021-12-18 20:54:24,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:24,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:24,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:54:24,287 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) [2021-12-18 20:54:24,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 20:54:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:24,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 20:54:24,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:54:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:24,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:54:24,733 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 20:54:24,733 INFO L388 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 [2021-12-18 20:54:24,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:54:24,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428293540] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:54:24,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:54:24,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-12-18 20:54:24,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8891055] [2021-12-18 20:54:24,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:54:24,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 20:54:24,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:24,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 20:54:24,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-18 20:54:24,787 INFO L87 Difference]: Start difference. First operand 559 states and 736 transitions. Second operand has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 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) [2021-12-18 20:54:25,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:25,396 INFO L93 Difference]: Finished difference Result 1845 states and 2286 transitions. [2021-12-18 20:54:25,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 20:54:25,397 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 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 46 [2021-12-18 20:54:25,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:25,404 INFO L225 Difference]: With dead ends: 1845 [2021-12-18 20:54:25,404 INFO L226 Difference]: Without dead ends: 1845 [2021-12-18 20:54:25,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-12-18 20:54:25,405 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 3460 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3462 SdHoareTripleChecker+Valid, 1054 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:25,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3462 Valid, 1054 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 20:54:25,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1845 states. [2021-12-18 20:54:25,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1845 to 690. [2021-12-18 20:54:25,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 618 states have (on average 1.3996763754045307) internal successors, (865), 664 states have internal predecessors, (865), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (20), 15 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-18 20:54:25,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 905 transitions. [2021-12-18 20:54:25,421 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 905 transitions. Word has length 46 [2021-12-18 20:54:25,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:25,421 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 905 transitions. [2021-12-18 20:54:25,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 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) [2021-12-18 20:54:25,422 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 905 transitions. [2021-12-18 20:54:25,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-18 20:54:25,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:25,422 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] [2021-12-18 20:54:25,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-18 20:54:25,635 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,SelfDestructingSolverStorable35 [2021-12-18 20:54:25,636 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:25,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:25,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1830908708, now seen corresponding path program 1 times [2021-12-18 20:54:25,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:25,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564205604] [2021-12-18 20:54:25,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:25,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:25,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:25,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 20:54:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:54:25,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:25,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564205604] [2021-12-18 20:54:25,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564205604] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:54:25,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124615058] [2021-12-18 20:54:25,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:25,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:25,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:54:25,690 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) [2021-12-18 20:54:25,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 20:54:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:25,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 20:54:25,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:54:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:25,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:54:25,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:54:25,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124615058] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:54:25,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:54:25,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-18 20:54:25,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482954008] [2021-12-18 20:54:25,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:54:25,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 20:54:25,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:25,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 20:54:25,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-18 20:54:25,985 INFO L87 Difference]: Start difference. First operand 690 states and 905 transitions. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-18 20:54:26,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:26,057 INFO L93 Difference]: Finished difference Result 2120 states and 2819 transitions. [2021-12-18 20:54:26,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 20:54:26,058 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2021-12-18 20:54:26,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:26,064 INFO L225 Difference]: With dead ends: 2120 [2021-12-18 20:54:26,064 INFO L226 Difference]: Without dead ends: 2120 [2021-12-18 20:54:26,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-12-18 20:54:26,065 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 859 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:26,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 977 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:54:26,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-12-18 20:54:26,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1428. [2021-12-18 20:54:26,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1347 states have (on average 1.4216778025241277) internal successors, (1915), 1393 states have internal predecessors, (1915), 29 states have call successors, (29), 10 states have call predecessors, (29), 10 states have return successors, (29), 24 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-18 20:54:26,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 1973 transitions. [2021-12-18 20:54:26,089 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 1973 transitions. Word has length 50 [2021-12-18 20:54:26,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:26,090 INFO L470 AbstractCegarLoop]: Abstraction has 1428 states and 1973 transitions. [2021-12-18 20:54:26,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-18 20:54:26,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 1973 transitions. [2021-12-18 20:54:26,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-18 20:54:26,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:26,091 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] [2021-12-18 20:54:26,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 20:54:26,307 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,SelfDestructingSolverStorable36 [2021-12-18 20:54:26,307 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:26,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:26,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1129844130, now seen corresponding path program 1 times [2021-12-18 20:54:26,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:26,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845963882] [2021-12-18 20:54:26,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:26,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:26,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:26,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:26,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:26,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 20:54:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:26,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:54:26,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:26,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845963882] [2021-12-18 20:54:26,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845963882] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:54:26,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225795536] [2021-12-18 20:54:26,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:26,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:26,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:54:26,463 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) [2021-12-18 20:54:26,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 20:54:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:26,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-18 20:54:26,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:54:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:26,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:54:26,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225795536] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:26,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:54:26,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 12 [2021-12-18 20:54:26,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312186555] [2021-12-18 20:54:26,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:26,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 20:54:26,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:26,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 20:54:26,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-18 20:54:26,856 INFO L87 Difference]: Start difference. First operand 1428 states and 1973 transitions. Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:54:27,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:27,059 INFO L93 Difference]: Finished difference Result 1840 states and 2504 transitions. [2021-12-18 20:54:27,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 20:54:27,059 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2021-12-18 20:54:27,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:27,065 INFO L225 Difference]: With dead ends: 1840 [2021-12-18 20:54:27,065 INFO L226 Difference]: Without dead ends: 1840 [2021-12-18 20:54:27,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-12-18 20:54:27,066 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 452 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:27,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 413 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:27,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-12-18 20:54:27,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1426. [2021-12-18 20:54:27,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1347 states have (on average 1.418708240534521) internal successors, (1911), 1391 states have internal predecessors, (1911), 29 states have call successors, (29), 10 states have call predecessors, (29), 10 states have return successors, (29), 24 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-18 20:54:27,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 1969 transitions. [2021-12-18 20:54:27,087 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 1969 transitions. Word has length 50 [2021-12-18 20:54:27,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:27,087 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 1969 transitions. [2021-12-18 20:54:27,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:54:27,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 1969 transitions. [2021-12-18 20:54:27,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 20:54:27,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:27,088 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] [2021-12-18 20:54:27,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 20:54:27,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:27,312 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:27,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:27,312 INFO L85 PathProgramCache]: Analyzing trace with hash -642104005, now seen corresponding path program 1 times [2021-12-18 20:54:27,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:27,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290823494] [2021-12-18 20:54:27,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:27,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:27,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:27,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:27,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:27,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290823494] [2021-12-18 20:54:27,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290823494] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:54:27,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285457323] [2021-12-18 20:54:27,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:27,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:27,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:54:27,344 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) [2021-12-18 20:54:27,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 20:54:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:27,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 20:54:27,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:54:27,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:27,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:54:27,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:27,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285457323] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:54:27,603 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:54:27,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-18 20:54:27,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015494319] [2021-12-18 20:54:27,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:54:27,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 20:54:27,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:27,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 20:54:27,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-18 20:54:27,605 INFO L87 Difference]: Start difference. First operand 1426 states and 1969 transitions. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 20:54:27,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:27,669 INFO L93 Difference]: Finished difference Result 2500 states and 3332 transitions. [2021-12-18 20:54:27,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 20:54:27,669 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 51 [2021-12-18 20:54:27,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:27,691 INFO L225 Difference]: With dead ends: 2500 [2021-12-18 20:54:27,691 INFO L226 Difference]: Without dead ends: 2500 [2021-12-18 20:54:27,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-12-18 20:54:27,692 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 682 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:27,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 713 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:54:27,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2021-12-18 20:54:27,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 2175. [2021-12-18 20:54:27,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2175 states, 2066 states have (on average 1.3906098741529527) internal successors, (2873), 2110 states have internal predecessors, (2873), 59 states have call successors, (59), 10 states have call predecessors, (59), 10 states have return successors, (59), 54 states have call predecessors, (59), 59 states have call successors, (59) [2021-12-18 20:54:27,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 2991 transitions. [2021-12-18 20:54:27,729 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 2991 transitions. Word has length 51 [2021-12-18 20:54:27,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:27,730 INFO L470 AbstractCegarLoop]: Abstraction has 2175 states and 2991 transitions. [2021-12-18 20:54:27,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 20:54:27,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 2991 transitions. [2021-12-18 20:54:27,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 20:54:27,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:27,731 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] [2021-12-18 20:54:27,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-18 20:54:27,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-18 20:54:27,935 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:27,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:27,936 INFO L85 PathProgramCache]: Analyzing trace with hash -55297991, now seen corresponding path program 1 times [2021-12-18 20:54:27,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:27,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543568511] [2021-12-18 20:54:27,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:27,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:27,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:54:27,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:27,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543568511] [2021-12-18 20:54:27,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543568511] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:54:27,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320017947] [2021-12-18 20:54:27,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:27,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:27,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:54:27,971 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) [2021-12-18 20:54:27,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 20:54:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:28,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 20:54:28,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:54:28,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:54:28,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:54:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:54:28,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320017947] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:54:28,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:54:28,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2021-12-18 20:54:28,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236517129] [2021-12-18 20:54:28,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:54:28,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 20:54:28,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:28,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 20:54:28,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:54:28,235 INFO L87 Difference]: Start difference. First operand 2175 states and 2991 transitions. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 20:54:28,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:28,289 INFO L93 Difference]: Finished difference Result 7538 states and 10350 transitions. [2021-12-18 20:54:28,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 20:54:28,290 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 51 [2021-12-18 20:54:28,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:28,306 INFO L225 Difference]: With dead ends: 7538 [2021-12-18 20:54:28,306 INFO L226 Difference]: Without dead ends: 7538 [2021-12-18 20:54:28,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-12-18 20:54:28,307 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 511 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:28,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 1123 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:54:28,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7538 states. [2021-12-18 20:54:28,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7538 to 5324. [2021-12-18 20:54:28,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5324 states, 5125 states have (on average 1.3810731707317072) internal successors, (7078), 5174 states have internal predecessors, (7078), 149 states have call successors, (149), 10 states have call predecessors, (149), 10 states have return successors, (149), 139 states have call predecessors, (149), 149 states have call successors, (149) [2021-12-18 20:54:28,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5324 states to 5324 states and 7376 transitions. [2021-12-18 20:54:28,386 INFO L78 Accepts]: Start accepts. Automaton has 5324 states and 7376 transitions. Word has length 51 [2021-12-18 20:54:28,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:28,386 INFO L470 AbstractCegarLoop]: Abstraction has 5324 states and 7376 transitions. [2021-12-18 20:54:28,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 20:54:28,387 INFO L276 IsEmpty]: Start isEmpty. Operand 5324 states and 7376 transitions. [2021-12-18 20:54:28,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 20:54:28,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:28,388 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] [2021-12-18 20:54:28,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 20:54:28,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-18 20:54:28,612 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:28,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:28,613 INFO L85 PathProgramCache]: Analyzing trace with hash -735356361, now seen corresponding path program 1 times [2021-12-18 20:54:28,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:28,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615511] [2021-12-18 20:54:28,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:28,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:28,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:28,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:28,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:28,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:28,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:28,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615511] [2021-12-18 20:54:28,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615511] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:28,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:28,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 20:54:28,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52584156] [2021-12-18 20:54:28,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:28,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:54:28,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:28,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:54:28,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:54:28,675 INFO L87 Difference]: Start difference. First operand 5324 states and 7376 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 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) [2021-12-18 20:54:28,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:28,702 INFO L93 Difference]: Finished difference Result 6292 states and 8819 transitions. [2021-12-18 20:54:28,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:54:28,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 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 [2021-12-18 20:54:28,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:28,713 INFO L225 Difference]: With dead ends: 6292 [2021-12-18 20:54:28,714 INFO L226 Difference]: Without dead ends: 6292 [2021-12-18 20:54:28,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:54:28,717 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 154 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:28,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 587 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:54:28,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6292 states. [2021-12-18 20:54:28,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6292 to 5085. [2021-12-18 20:54:28,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5085 states, 4900 states have (on average 1.3891836734693876) internal successors, (6807), 4949 states have internal predecessors, (6807), 136 states have call successors, (136), 9 states have call predecessors, (136), 9 states have return successors, (136), 126 states have call predecessors, (136), 136 states have call successors, (136) [2021-12-18 20:54:28,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5085 states to 5085 states and 7079 transitions. [2021-12-18 20:54:28,783 INFO L78 Accepts]: Start accepts. Automaton has 5085 states and 7079 transitions. Word has length 51 [2021-12-18 20:54:28,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:28,784 INFO L470 AbstractCegarLoop]: Abstraction has 5085 states and 7079 transitions. [2021-12-18 20:54:28,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 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) [2021-12-18 20:54:28,784 INFO L276 IsEmpty]: Start isEmpty. Operand 5085 states and 7079 transitions. [2021-12-18 20:54:28,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 20:54:28,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:28,785 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] [2021-12-18 20:54:28,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-18 20:54:28,785 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:28,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:28,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1366525278, now seen corresponding path program 1 times [2021-12-18 20:54:28,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:28,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470187958] [2021-12-18 20:54:28,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:28,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:28,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:28,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:28,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470187958] [2021-12-18 20:54:28,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470187958] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:54:28,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312591246] [2021-12-18 20:54:28,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:28,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:28,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:54:28,984 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) [2021-12-18 20:54:29,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 20:54:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:29,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-18 20:54:29,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:54:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:29,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:54:29,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312591246] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:29,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:54:29,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 14 [2021-12-18 20:54:29,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708352976] [2021-12-18 20:54:29,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:29,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 20:54:29,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:29,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 20:54:29,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-12-18 20:54:29,482 INFO L87 Difference]: Start difference. First operand 5085 states and 7079 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 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) [2021-12-18 20:54:29,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:29,627 INFO L93 Difference]: Finished difference Result 5133 states and 7110 transitions. [2021-12-18 20:54:29,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 20:54:29,628 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 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 [2021-12-18 20:54:29,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:29,637 INFO L225 Difference]: With dead ends: 5133 [2021-12-18 20:54:29,638 INFO L226 Difference]: Without dead ends: 5133 [2021-12-18 20:54:29,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-12-18 20:54:29,640 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 425 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:29,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 407 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:29,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5133 states. [2021-12-18 20:54:29,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5133 to 5087. [2021-12-18 20:54:29,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5087 states, 4902 states have (on average 1.3892288861689106) internal successors, (6810), 4951 states have internal predecessors, (6810), 136 states have call successors, (136), 9 states have call predecessors, (136), 9 states have return successors, (136), 126 states have call predecessors, (136), 136 states have call successors, (136) [2021-12-18 20:54:29,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5087 states to 5087 states and 7082 transitions. [2021-12-18 20:54:29,702 INFO L78 Accepts]: Start accepts. Automaton has 5087 states and 7082 transitions. Word has length 51 [2021-12-18 20:54:29,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:29,702 INFO L470 AbstractCegarLoop]: Abstraction has 5087 states and 7082 transitions. [2021-12-18 20:54:29,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 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) [2021-12-18 20:54:29,702 INFO L276 IsEmpty]: Start isEmpty. Operand 5087 states and 7082 transitions. [2021-12-18 20:54:29,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 20:54:29,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:29,704 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] [2021-12-18 20:54:29,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 20:54:29,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:29,918 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:29,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:29,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1366525340, now seen corresponding path program 1 times [2021-12-18 20:54:29,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:29,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511983918] [2021-12-18 20:54:29,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:29,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:30,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:30,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:30,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:30,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511983918] [2021-12-18 20:54:30,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511983918] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:54:30,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376597987] [2021-12-18 20:54:30,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:30,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:30,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:54:30,084 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) [2021-12-18 20:54:30,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 20:54:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:30,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-18 20:54:30,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:54:30,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:30,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:54:30,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376597987] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:30,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:54:30,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 12 [2021-12-18 20:54:30,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945208410] [2021-12-18 20:54:30,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:30,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 20:54:30,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:30,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 20:54:30,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-18 20:54:30,622 INFO L87 Difference]: Start difference. First operand 5087 states and 7082 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 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) [2021-12-18 20:54:30,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:30,786 INFO L93 Difference]: Finished difference Result 5132 states and 7108 transitions. [2021-12-18 20:54:30,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 20:54:30,786 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 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 [2021-12-18 20:54:30,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:30,795 INFO L225 Difference]: With dead ends: 5132 [2021-12-18 20:54:30,795 INFO L226 Difference]: Without dead ends: 5132 [2021-12-18 20:54:30,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-18 20:54:30,796 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 355 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:30,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 473 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:30,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5132 states. [2021-12-18 20:54:30,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5132 to 5084. [2021-12-18 20:54:30,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5084 states, 4900 states have (on average 1.3887755102040817) internal successors, (6805), 4948 states have internal predecessors, (6805), 136 states have call successors, (136), 9 states have call predecessors, (136), 9 states have return successors, (136), 126 states have call predecessors, (136), 136 states have call successors, (136) [2021-12-18 20:54:30,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5084 states to 5084 states and 7077 transitions. [2021-12-18 20:54:30,856 INFO L78 Accepts]: Start accepts. Automaton has 5084 states and 7077 transitions. Word has length 51 [2021-12-18 20:54:30,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:30,856 INFO L470 AbstractCegarLoop]: Abstraction has 5084 states and 7077 transitions. [2021-12-18 20:54:30,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 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) [2021-12-18 20:54:30,857 INFO L276 IsEmpty]: Start isEmpty. Operand 5084 states and 7077 transitions. [2021-12-18 20:54:30,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 20:54:30,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:30,858 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] [2021-12-18 20:54:30,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 20:54:31,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:31,080 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:31,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:31,080 INFO L85 PathProgramCache]: Analyzing trace with hash -846512861, now seen corresponding path program 1 times [2021-12-18 20:54:31,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:31,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903590789] [2021-12-18 20:54:31,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:31,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:31,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:31,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:31,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-18 20:54:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:31,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:54:31,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:31,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903590789] [2021-12-18 20:54:31,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903590789] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:54:31,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504637859] [2021-12-18 20:54:31,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:31,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:31,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:54:31,240 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) [2021-12-18 20:54:31,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 20:54:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:31,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 20:54:31,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:54:31,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:31,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:54:31,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504637859] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:31,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:54:31,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 14 [2021-12-18 20:54:31,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96112937] [2021-12-18 20:54:31,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:31,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 20:54:31,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:31,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 20:54:31,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-12-18 20:54:31,698 INFO L87 Difference]: Start difference. First operand 5084 states and 7077 transitions. Second operand has 7 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:54:31,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:31,951 INFO L93 Difference]: Finished difference Result 5233 states and 7215 transitions. [2021-12-18 20:54:31,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 20:54:31,952 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2021-12-18 20:54:31,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:31,961 INFO L225 Difference]: With dead ends: 5233 [2021-12-18 20:54:31,961 INFO L226 Difference]: Without dead ends: 5233 [2021-12-18 20:54:31,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-12-18 20:54:31,962 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 361 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:31,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 503 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:54:31,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5233 states. [2021-12-18 20:54:32,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5233 to 5083. [2021-12-18 20:54:32,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5083 states, 4900 states have (on average 1.3818367346938776) internal successors, (6771), 4947 states have internal predecessors, (6771), 136 states have call successors, (136), 9 states have call predecessors, (136), 9 states have return successors, (136), 126 states have call predecessors, (136), 136 states have call successors, (136) [2021-12-18 20:54:32,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5083 states to 5083 states and 7043 transitions. [2021-12-18 20:54:32,026 INFO L78 Accepts]: Start accepts. Automaton has 5083 states and 7043 transitions. Word has length 52 [2021-12-18 20:54:32,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:32,027 INFO L470 AbstractCegarLoop]: Abstraction has 5083 states and 7043 transitions. [2021-12-18 20:54:32,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:54:32,027 INFO L276 IsEmpty]: Start isEmpty. Operand 5083 states and 7043 transitions. [2021-12-18 20:54:32,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 20:54:32,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:32,028 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] [2021-12-18 20:54:32,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 20:54:32,244 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,SelfDestructingSolverStorable43 [2021-12-18 20:54:32,245 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:32,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:32,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1854248023, now seen corresponding path program 1 times [2021-12-18 20:54:32,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:32,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312564251] [2021-12-18 20:54:32,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:32,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:32,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:32,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:32,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312564251] [2021-12-18 20:54:32,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312564251] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:54:32,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111570584] [2021-12-18 20:54:32,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:32,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:32,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:54:32,318 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) [2021-12-18 20:54:32,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 20:54:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:32,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-18 20:54:32,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:54:32,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:54:32,721 INFO L388 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 [2021-12-18 20:54:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:54:32,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:54:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:54:32,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111570584] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:54:32,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:54:32,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 15 [2021-12-18 20:54:32,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913417245] [2021-12-18 20:54:32,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:54:32,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 20:54:32,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:32,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 20:54:32,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-18 20:54:32,970 INFO L87 Difference]: Start difference. First operand 5083 states and 7043 transitions. Second operand has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 20:54:33,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:33,633 INFO L93 Difference]: Finished difference Result 6804 states and 9475 transitions. [2021-12-18 20:54:33,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 20:54:33,634 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 52 [2021-12-18 20:54:33,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:33,647 INFO L225 Difference]: With dead ends: 6804 [2021-12-18 20:54:33,647 INFO L226 Difference]: Without dead ends: 6797 [2021-12-18 20:54:33,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-12-18 20:54:33,648 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 584 mSDsluCounter, 1874 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 2119 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:33,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [587 Valid, 2119 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 20:54:33,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6797 states. [2021-12-18 20:54:33,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6797 to 5128. [2021-12-18 20:54:33,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5128 states, 4945 states have (on average 1.3779575328614762) internal successors, (6814), 4992 states have internal predecessors, (6814), 136 states have call successors, (136), 9 states have call predecessors, (136), 9 states have return successors, (136), 126 states have call predecessors, (136), 136 states have call successors, (136) [2021-12-18 20:54:33,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5128 states to 5128 states and 7086 transitions. [2021-12-18 20:54:33,721 INFO L78 Accepts]: Start accepts. Automaton has 5128 states and 7086 transitions. Word has length 52 [2021-12-18 20:54:33,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:33,721 INFO L470 AbstractCegarLoop]: Abstraction has 5128 states and 7086 transitions. [2021-12-18 20:54:33,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-18 20:54:33,722 INFO L276 IsEmpty]: Start isEmpty. Operand 5128 states and 7086 transitions. [2021-12-18 20:54:33,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-18 20:54:33,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:33,723 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-18 20:54:33,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 20:54:33,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:33,937 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:33,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:33,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1882183379, now seen corresponding path program 1 times [2021-12-18 20:54:33,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:33,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829794202] [2021-12-18 20:54:33,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:33,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:33,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:34,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-18 20:54:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:34,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-18 20:54:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:34,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:54:34,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:34,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829794202] [2021-12-18 20:54:34,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829794202] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:54:34,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073996910] [2021-12-18 20:54:34,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:34,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:34,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:54:34,043 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) [2021-12-18 20:54:34,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 20:54:34,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:34,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-18 20:54:34,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:54:34,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:54:34,340 INFO L388 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 [2021-12-18 20:54:34,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:54:34,348 INFO L388 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 [2021-12-18 20:54:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:54:34,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:54:34,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073996910] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:34,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:54:34,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2021-12-18 20:54:34,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533323476] [2021-12-18 20:54:34,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:34,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 20:54:34,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:34,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 20:54:34,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-18 20:54:34,439 INFO L87 Difference]: Start difference. First operand 5128 states and 7086 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:54:34,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:34,711 INFO L93 Difference]: Finished difference Result 4193 states and 5861 transitions. [2021-12-18 20:54:34,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 20:54:34,711 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2021-12-18 20:54:34,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:34,718 INFO L225 Difference]: With dead ends: 4193 [2021-12-18 20:54:34,718 INFO L226 Difference]: Without dead ends: 4193 [2021-12-18 20:54:34,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-12-18 20:54:34,719 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 298 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:34,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 1445 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:54:34,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4193 states. [2021-12-18 20:54:34,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4193 to 3493. [2021-12-18 20:54:34,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3493 states, 3375 states have (on average 1.4112592592592592) internal successors, (4763), 3412 states have internal predecessors, (4763), 76 states have call successors, (76), 4 states have call predecessors, (76), 4 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2021-12-18 20:54:34,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3493 states to 3493 states and 4915 transitions. [2021-12-18 20:54:34,759 INFO L78 Accepts]: Start accepts. Automaton has 3493 states and 4915 transitions. Word has length 54 [2021-12-18 20:54:34,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:34,759 INFO L470 AbstractCegarLoop]: Abstraction has 3493 states and 4915 transitions. [2021-12-18 20:54:34,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:54:34,760 INFO L276 IsEmpty]: Start isEmpty. Operand 3493 states and 4915 transitions. [2021-12-18 20:54:34,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-18 20:54:34,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:34,761 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] [2021-12-18 20:54:34,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-18 20:54:34,979 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,SelfDestructingSolverStorable45 [2021-12-18 20:54:34,979 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:34,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:34,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1840199306, now seen corresponding path program 1 times [2021-12-18 20:54:34,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:34,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315927724] [2021-12-18 20:54:34,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:34,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:35,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:35,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:35,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315927724] [2021-12-18 20:54:35,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315927724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:35,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:35,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-18 20:54:35,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522829059] [2021-12-18 20:54:35,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:35,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 20:54:35,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:35,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 20:54:35,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-12-18 20:54:35,213 INFO L87 Difference]: Start difference. First operand 3493 states and 4915 transitions. Second operand has 13 states, 12 states have (on average 4.333333333333333) 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) [2021-12-18 20:54:35,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:35,890 INFO L93 Difference]: Finished difference Result 7432 states and 10527 transitions. [2021-12-18 20:54:35,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 20:54:35,891 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.333333333333333) 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 [2021-12-18 20:54:35,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:35,903 INFO L225 Difference]: With dead ends: 7432 [2021-12-18 20:54:35,903 INFO L226 Difference]: Without dead ends: 7432 [2021-12-18 20:54:35,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2021-12-18 20:54:35,904 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 983 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 985 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:35,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [985 Valid, 1340 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 20:54:35,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7432 states. [2021-12-18 20:54:35,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7432 to 4310. [2021-12-18 20:54:35,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4310 states, 4137 states have (on average 1.3976311336717429) internal successors, (5782), 4198 states have internal predecessors, (5782), 129 states have call successors, (129), 7 states have call predecessors, (129), 7 states have return successors, (129), 104 states have call predecessors, (129), 129 states have call successors, (129) [2021-12-18 20:54:35,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4310 states to 4310 states and 6040 transitions. [2021-12-18 20:54:35,985 INFO L78 Accepts]: Start accepts. Automaton has 4310 states and 6040 transitions. Word has length 54 [2021-12-18 20:54:35,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:35,986 INFO L470 AbstractCegarLoop]: Abstraction has 4310 states and 6040 transitions. [2021-12-18 20:54:35,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.333333333333333) 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) [2021-12-18 20:54:35,986 INFO L276 IsEmpty]: Start isEmpty. Operand 4310 states and 6040 transitions. [2021-12-18 20:54:35,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-18 20:54:35,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:35,988 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] [2021-12-18 20:54:35,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-18 20:54:35,988 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:35,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:35,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1840199305, now seen corresponding path program 1 times [2021-12-18 20:54:35,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:35,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351758630] [2021-12-18 20:54:35,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:35,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:36,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:36,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:36,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:36,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:36,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:36,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351758630] [2021-12-18 20:54:36,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351758630] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:36,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:36,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-18 20:54:36,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665889217] [2021-12-18 20:54:36,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:36,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 20:54:36,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:36,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 20:54:36,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-18 20:54:36,381 INFO L87 Difference]: Start difference. First operand 4310 states and 6040 transitions. Second operand has 14 states, 13 states have (on average 4.0) 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) [2021-12-18 20:54:37,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:37,524 INFO L93 Difference]: Finished difference Result 7765 states and 10941 transitions. [2021-12-18 20:54:37,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 20:54:37,525 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.0) 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 [2021-12-18 20:54:37,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:37,538 INFO L225 Difference]: With dead ends: 7765 [2021-12-18 20:54:37,538 INFO L226 Difference]: Without dead ends: 7765 [2021-12-18 20:54:37,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-12-18 20:54:37,539 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 1113 mSDsluCounter, 1296 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:37,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1115 Valid, 1438 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 20:54:37,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7765 states. [2021-12-18 20:54:37,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7765 to 5181. [2021-12-18 20:54:37,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5181 states, 4938 states have (on average 1.3839611178614823) internal successors, (6834), 5026 states have internal predecessors, (6834), 195 states have call successors, (195), 11 states have call predecessors, (195), 11 states have return successors, (195), 143 states have call predecessors, (195), 195 states have call successors, (195) [2021-12-18 20:54:37,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5181 states to 5181 states and 7224 transitions. [2021-12-18 20:54:37,619 INFO L78 Accepts]: Start accepts. Automaton has 5181 states and 7224 transitions. Word has length 54 [2021-12-18 20:54:37,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:37,619 INFO L470 AbstractCegarLoop]: Abstraction has 5181 states and 7224 transitions. [2021-12-18 20:54:37,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.0) 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) [2021-12-18 20:54:37,620 INFO L276 IsEmpty]: Start isEmpty. Operand 5181 states and 7224 transitions. [2021-12-18 20:54:37,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-18 20:54:37,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:37,621 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] [2021-12-18 20:54:37,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-12-18 20:54:37,621 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:37,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:37,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1838352264, now seen corresponding path program 1 times [2021-12-18 20:54:37,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:37,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552531296] [2021-12-18 20:54:37,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:37,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:37,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:38,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:38,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:38,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552531296] [2021-12-18 20:54:38,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552531296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:38,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:38,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-18 20:54:38,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5778136] [2021-12-18 20:54:38,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:38,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 20:54:38,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:38,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 20:54:38,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-18 20:54:38,560 INFO L87 Difference]: Start difference. First operand 5181 states and 7224 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 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) [2021-12-18 20:54:39,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:39,129 INFO L93 Difference]: Finished difference Result 5218 states and 7259 transitions. [2021-12-18 20:54:39,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 20:54:39,130 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 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 [2021-12-18 20:54:39,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:39,137 INFO L225 Difference]: With dead ends: 5218 [2021-12-18 20:54:39,137 INFO L226 Difference]: Without dead ends: 5218 [2021-12-18 20:54:39,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-12-18 20:54:39,138 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 126 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:39,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 986 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 20:54:39,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5218 states. [2021-12-18 20:54:39,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5218 to 5214. [2021-12-18 20:54:39,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5214 states, 4972 states have (on average 1.3811343523732904) internal successors, (6867), 5059 states have internal predecessors, (6867), 194 states have call successors, (194), 11 states have call predecessors, (194), 11 states have return successors, (194), 143 states have call predecessors, (194), 194 states have call successors, (194) [2021-12-18 20:54:39,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5214 states to 5214 states and 7255 transitions. [2021-12-18 20:54:39,201 INFO L78 Accepts]: Start accepts. Automaton has 5214 states and 7255 transitions. Word has length 54 [2021-12-18 20:54:39,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:39,201 INFO L470 AbstractCegarLoop]: Abstraction has 5214 states and 7255 transitions. [2021-12-18 20:54:39,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 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) [2021-12-18 20:54:39,202 INFO L276 IsEmpty]: Start isEmpty. Operand 5214 states and 7255 transitions. [2021-12-18 20:54:39,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-18 20:54:39,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:39,204 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] [2021-12-18 20:54:39,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-12-18 20:54:39,204 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:39,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:39,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1322474338, now seen corresponding path program 1 times [2021-12-18 20:54:39,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:39,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749549175] [2021-12-18 20:54:39,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:39,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:39,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:39,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:39,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:39,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:39,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:39,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749549175] [2021-12-18 20:54:39,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749549175] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:54:39,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412050190] [2021-12-18 20:54:39,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:39,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:39,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:54:39,584 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) [2021-12-18 20:54:39,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 20:54:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:39,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-18 20:54:39,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:54:39,804 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:54:39,804 INFO L388 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 [2021-12-18 20:54:39,977 INFO L388 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 [2021-12-18 20:54:39,985 INFO L388 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 [2021-12-18 20:54:40,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:54:40,044 INFO L388 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 25 treesize of output 24 [2021-12-18 20:54:40,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:54:40,052 INFO L388 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 25 treesize of output 24 [2021-12-18 20:54:40,121 INFO L388 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 [2021-12-18 20:54:40,127 INFO L388 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 [2021-12-18 20:54:40,245 INFO L388 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 [2021-12-18 20:54:40,251 INFO L388 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 [2021-12-18 20:54:40,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:40,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:54:40,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412050190] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:40,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:54:40,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 22 [2021-12-18 20:54:40,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125650673] [2021-12-18 20:54:40,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:40,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 20:54:40,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:40,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 20:54:40,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-12-18 20:54:40,301 INFO L87 Difference]: Start difference. First operand 5214 states and 7255 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 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) [2021-12-18 20:54:40,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:40,875 INFO L93 Difference]: Finished difference Result 7213 states and 10074 transitions. [2021-12-18 20:54:40,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 20:54:40,876 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 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 55 [2021-12-18 20:54:40,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:40,884 INFO L225 Difference]: With dead ends: 7213 [2021-12-18 20:54:40,885 INFO L226 Difference]: Without dead ends: 7213 [2021-12-18 20:54:40,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2021-12-18 20:54:40,886 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 477 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 1413 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:40,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 1413 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 20:54:40,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7213 states. [2021-12-18 20:54:40,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7213 to 5257. [2021-12-18 20:54:40,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5257 states, 5016 states have (on average 1.376993620414673) internal successors, (6907), 5102 states have internal predecessors, (6907), 193 states have call successors, (193), 11 states have call predecessors, (193), 11 states have return successors, (193), 143 states have call predecessors, (193), 193 states have call successors, (193) [2021-12-18 20:54:40,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5257 states to 5257 states and 7293 transitions. [2021-12-18 20:54:40,949 INFO L78 Accepts]: Start accepts. Automaton has 5257 states and 7293 transitions. Word has length 55 [2021-12-18 20:54:40,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:40,950 INFO L470 AbstractCegarLoop]: Abstraction has 5257 states and 7293 transitions. [2021-12-18 20:54:40,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 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) [2021-12-18 20:54:40,950 INFO L276 IsEmpty]: Start isEmpty. Operand 5257 states and 7293 transitions. [2021-12-18 20:54:40,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-18 20:54:40,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:40,951 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] [2021-12-18 20:54:40,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-18 20:54:41,171 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,SelfDestructingSolverStorable49 [2021-12-18 20:54:41,171 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:41,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:41,172 INFO L85 PathProgramCache]: Analyzing trace with hash 840572766, now seen corresponding path program 1 times [2021-12-18 20:54:41,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:41,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858028213] [2021-12-18 20:54:41,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:41,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:41,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:41,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:41,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858028213] [2021-12-18 20:54:41,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858028213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:41,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:41,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-18 20:54:41,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230149948] [2021-12-18 20:54:41,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:41,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 20:54:41,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:41,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 20:54:41,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-12-18 20:54:41,645 INFO L87 Difference]: Start difference. First operand 5257 states and 7293 transitions. Second operand has 16 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 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) [2021-12-18 20:54:42,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:42,767 INFO L93 Difference]: Finished difference Result 7759 states and 10913 transitions. [2021-12-18 20:54:42,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 20:54:42,768 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 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 56 [2021-12-18 20:54:42,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:42,812 INFO L225 Difference]: With dead ends: 7759 [2021-12-18 20:54:42,812 INFO L226 Difference]: Without dead ends: 7759 [2021-12-18 20:54:42,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 20:54:42,813 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 1728 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1732 SdHoareTripleChecker+Valid, 1288 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:42,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1732 Valid, 1288 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 20:54:42,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7759 states. [2021-12-18 20:54:42,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7759 to 5582. [2021-12-18 20:54:42,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5582 states, 5318 states have (on average 1.3762692741632192) internal successors, (7319), 5414 states have internal predecessors, (7319), 215 states have call successors, (215), 12 states have call predecessors, (215), 12 states have return successors, (215), 155 states have call predecessors, (215), 215 states have call successors, (215) [2021-12-18 20:54:42,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5582 states to 5582 states and 7749 transitions. [2021-12-18 20:54:42,891 INFO L78 Accepts]: Start accepts. Automaton has 5582 states and 7749 transitions. Word has length 56 [2021-12-18 20:54:42,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:42,891 INFO L470 AbstractCegarLoop]: Abstraction has 5582 states and 7749 transitions. [2021-12-18 20:54:42,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 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) [2021-12-18 20:54:42,892 INFO L276 IsEmpty]: Start isEmpty. Operand 5582 states and 7749 transitions. [2021-12-18 20:54:42,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-18 20:54:42,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:42,895 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] [2021-12-18 20:54:42,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-12-18 20:54:42,896 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:42,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:42,896 INFO L85 PathProgramCache]: Analyzing trace with hash 840572767, now seen corresponding path program 1 times [2021-12-18 20:54:42,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:42,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106699124] [2021-12-18 20:54:42,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:42,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:43,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:43,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:43,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:43,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106699124] [2021-12-18 20:54:43,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106699124] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:43,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:43,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-18 20:54:43,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448022662] [2021-12-18 20:54:43,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:43,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 20:54:43,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:43,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 20:54:43,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-12-18 20:54:43,439 INFO L87 Difference]: Start difference. First operand 5582 states and 7749 transitions. Second operand has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 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) [2021-12-18 20:54:44,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:44,496 INFO L93 Difference]: Finished difference Result 7430 states and 10433 transitions. [2021-12-18 20:54:44,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 20:54:44,497 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 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 56 [2021-12-18 20:54:44,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:44,508 INFO L225 Difference]: With dead ends: 7430 [2021-12-18 20:54:44,508 INFO L226 Difference]: Without dead ends: 7430 [2021-12-18 20:54:44,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-12-18 20:54:44,509 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 1401 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1403 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:44,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1403 Valid, 1203 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 20:54:44,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7430 states. [2021-12-18 20:54:44,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7430 to 5598. [2021-12-18 20:54:44,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5598 states, 5334 states have (on average 1.378140232470941) internal successors, (7351), 5430 states have internal predecessors, (7351), 215 states have call successors, (215), 12 states have call predecessors, (215), 12 states have return successors, (215), 155 states have call predecessors, (215), 215 states have call successors, (215) [2021-12-18 20:54:44,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5598 states to 5598 states and 7781 transitions. [2021-12-18 20:54:44,581 INFO L78 Accepts]: Start accepts. Automaton has 5598 states and 7781 transitions. Word has length 56 [2021-12-18 20:54:44,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:44,582 INFO L470 AbstractCegarLoop]: Abstraction has 5598 states and 7781 transitions. [2021-12-18 20:54:44,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 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) [2021-12-18 20:54:44,582 INFO L276 IsEmpty]: Start isEmpty. Operand 5598 states and 7781 transitions. [2021-12-18 20:54:44,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-18 20:54:44,583 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:44,583 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] [2021-12-18 20:54:44,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-12-18 20:54:44,583 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:44,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:44,584 INFO L85 PathProgramCache]: Analyzing trace with hash 842419808, now seen corresponding path program 1 times [2021-12-18 20:54:44,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:44,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690500314] [2021-12-18 20:54:44,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:44,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:44,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:44,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:44,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:44,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:44,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690500314] [2021-12-18 20:54:44,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690500314] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:44,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:44,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-18 20:54:44,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809068380] [2021-12-18 20:54:44,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:44,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 20:54:44,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:44,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 20:54:44,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-18 20:54:44,774 INFO L87 Difference]: Start difference. First operand 5598 states and 7781 transitions. Second operand has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 12 states have internal predecessors, (54), 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) [2021-12-18 20:54:45,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:45,308 INFO L93 Difference]: Finished difference Result 8676 states and 12150 transitions. [2021-12-18 20:54:45,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 20:54:45,309 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 12 states have internal predecessors, (54), 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 56 [2021-12-18 20:54:45,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:45,322 INFO L225 Difference]: With dead ends: 8676 [2021-12-18 20:54:45,322 INFO L226 Difference]: Without dead ends: 8676 [2021-12-18 20:54:45,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-12-18 20:54:45,323 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 1339 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1341 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:45,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1341 Valid, 1090 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 20:54:45,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8676 states. [2021-12-18 20:54:45,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8676 to 6570. [2021-12-18 20:54:45,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6570 states, 6219 states have (on average 1.367261617623412) internal successors, (8503), 6353 states have internal predecessors, (8503), 297 states have call successors, (297), 17 states have call predecessors, (297), 17 states have return successors, (297), 199 states have call predecessors, (297), 297 states have call successors, (297) [2021-12-18 20:54:45,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6570 states to 6570 states and 9097 transitions. [2021-12-18 20:54:45,420 INFO L78 Accepts]: Start accepts. Automaton has 6570 states and 9097 transitions. Word has length 56 [2021-12-18 20:54:45,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:45,421 INFO L470 AbstractCegarLoop]: Abstraction has 6570 states and 9097 transitions. [2021-12-18 20:54:45,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 12 states have internal predecessors, (54), 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) [2021-12-18 20:54:45,421 INFO L276 IsEmpty]: Start isEmpty. Operand 6570 states and 9097 transitions. [2021-12-18 20:54:45,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-18 20:54:45,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:45,422 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] [2021-12-18 20:54:45,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-12-18 20:54:45,423 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:45,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:45,423 INFO L85 PathProgramCache]: Analyzing trace with hash 842419809, now seen corresponding path program 1 times [2021-12-18 20:54:45,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:45,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036137856] [2021-12-18 20:54:45,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:45,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:45,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:45,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:45,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:45,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:45,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036137856] [2021-12-18 20:54:45,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036137856] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:45,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:45,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-18 20:54:45,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793126723] [2021-12-18 20:54:45,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:45,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 20:54:45,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:45,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 20:54:45,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-18 20:54:45,769 INFO L87 Difference]: Start difference. First operand 6570 states and 9097 transitions. Second operand has 11 states, 10 states have (on average 5.4) internal successors, (54), 11 states have internal predecessors, (54), 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) [2021-12-18 20:54:46,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:46,272 INFO L93 Difference]: Finished difference Result 8294 states and 11610 transitions. [2021-12-18 20:54:46,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 20:54:46,272 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 11 states have internal predecessors, (54), 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 56 [2021-12-18 20:54:46,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:46,285 INFO L225 Difference]: With dead ends: 8294 [2021-12-18 20:54:46,285 INFO L226 Difference]: Without dead ends: 8294 [2021-12-18 20:54:46,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-12-18 20:54:46,286 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 1176 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1176 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:46,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1176 Valid, 881 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 20:54:46,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8294 states. [2021-12-18 20:54:46,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8294 to 7048. [2021-12-18 20:54:46,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7048 states, 6669 states have (on average 1.3658719448193133) internal successors, (9109), 6807 states have internal predecessors, (9109), 323 states have call successors, (323), 19 states have call predecessors, (323), 19 states have return successors, (323), 221 states have call predecessors, (323), 323 states have call successors, (323) [2021-12-18 20:54:46,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7048 states to 7048 states and 9755 transitions. [2021-12-18 20:54:46,379 INFO L78 Accepts]: Start accepts. Automaton has 7048 states and 9755 transitions. Word has length 56 [2021-12-18 20:54:46,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:46,379 INFO L470 AbstractCegarLoop]: Abstraction has 7048 states and 9755 transitions. [2021-12-18 20:54:46,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 11 states have internal predecessors, (54), 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) [2021-12-18 20:54:46,379 INFO L276 IsEmpty]: Start isEmpty. Operand 7048 states and 9755 transitions. [2021-12-18 20:54:46,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-18 20:54:46,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:46,381 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, 1] [2021-12-18 20:54:46,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-12-18 20:54:46,383 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:46,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:46,383 INFO L85 PathProgramCache]: Analyzing trace with hash 110361472, now seen corresponding path program 1 times [2021-12-18 20:54:46,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:46,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609498214] [2021-12-18 20:54:46,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:46,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:46,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:46,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-18 20:54:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:46,942 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:54:46,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:46,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609498214] [2021-12-18 20:54:46,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609498214] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:54:46,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087450138] [2021-12-18 20:54:46,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:46,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:46,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:54:46,945 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) [2021-12-18 20:54:46,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-18 20:54:47,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:47,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-18 20:54:47,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:54:47,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 20:54:47,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 20:54:47,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:54:47,544 INFO L388 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 [2021-12-18 20:54:47,681 INFO L354 Elim1Store]: treesize reduction 36, result has 37.9 percent of original size [2021-12-18 20:54:47,681 INFO L388 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 [2021-12-18 20:54:47,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:54:47,764 INFO L388 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 [2021-12-18 20:54:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:47,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:54:47,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087450138] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:54:47,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:54:47,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 26 [2021-12-18 20:54:47,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279194434] [2021-12-18 20:54:47,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:54:47,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-18 20:54:47,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:47,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-18 20:54:47,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-12-18 20:54:47,888 INFO L87 Difference]: Start difference. First operand 7048 states and 9755 transitions. Second operand has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 23 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) [2021-12-18 20:54:49,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:49,112 INFO L93 Difference]: Finished difference Result 9554 states and 13316 transitions. [2021-12-18 20:54:49,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 20:54:49,113 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 23 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 [2021-12-18 20:54:49,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:49,125 INFO L225 Difference]: With dead ends: 9554 [2021-12-18 20:54:49,125 INFO L226 Difference]: Without dead ends: 9554 [2021-12-18 20:54:49,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=483, Invalid=1773, Unknown=0, NotChecked=0, Total=2256 [2021-12-18 20:54:49,126 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 2095 mSDsluCounter, 2164 mSDsCounter, 0 mSdLazyCounter, 1249 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2096 SdHoareTripleChecker+Valid, 2313 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:49,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2096 Valid, 2313 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1249 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 20:54:49,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9554 states. [2021-12-18 20:54:49,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9554 to 7900. [2021-12-18 20:54:49,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7900 states, 7466 states have (on average 1.358960621484061) internal successors, (10146), 7604 states have internal predecessors, (10146), 375 states have call successors, (375), 22 states have call predecessors, (375), 22 states have return successors, (375), 273 states have call predecessors, (375), 375 states have call successors, (375) [2021-12-18 20:54:49,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 10896 transitions. [2021-12-18 20:54:49,222 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 10896 transitions. Word has length 57 [2021-12-18 20:54:49,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:49,222 INFO L470 AbstractCegarLoop]: Abstraction has 7900 states and 10896 transitions. [2021-12-18 20:54:49,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 23 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) [2021-12-18 20:54:49,222 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 10896 transitions. [2021-12-18 20:54:49,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-18 20:54:49,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:49,223 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, 1] [2021-12-18 20:54:49,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-18 20:54:49,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-12-18 20:54:49,447 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:49,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:49,448 INFO L85 PathProgramCache]: Analyzing trace with hash 110361473, now seen corresponding path program 1 times [2021-12-18 20:54:49,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:49,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716098077] [2021-12-18 20:54:49,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:49,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:49,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:50,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:50,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-18 20:54:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:54:50,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:50,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716098077] [2021-12-18 20:54:50,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716098077] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:54:50,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990787001] [2021-12-18 20:54:50,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:50,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:50,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:54:50,207 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:54:50,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-18 20:54:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:50,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-18 20:54:50,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:54:50,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 20:54:50,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 20:54:50,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 20:54:50,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 20:54:50,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:54:50,953 INFO L388 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 [2021-12-18 20:54:50,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:54:50,961 INFO L388 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 [2021-12-18 20:54:51,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:54:51,163 INFO L388 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 18 treesize of output 20 [2021-12-18 20:54:51,169 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-18 20:54:51,169 INFO L388 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 17 treesize of output 17 [2021-12-18 20:54:51,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:54:51,302 INFO L388 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 [2021-12-18 20:54:51,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:54:51,309 INFO L388 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 [2021-12-18 20:54:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:51,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:54:51,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990787001] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:54:51,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:54:51,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12] total 32 [2021-12-18 20:54:51,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416147160] [2021-12-18 20:54:51,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:54:51,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-18 20:54:51,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:51,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-18 20:54:51,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-12-18 20:54:51,535 INFO L87 Difference]: Start difference. First operand 7900 states and 10896 transitions. Second operand has 33 states, 32 states have (on average 3.3125) internal successors, (106), 29 states have internal predecessors, (106), 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) [2021-12-18 20:54:53,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:53,300 INFO L93 Difference]: Finished difference Result 9699 states and 13507 transitions. [2021-12-18 20:54:53,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 20:54:53,301 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.3125) internal successors, (106), 29 states have internal predecessors, (106), 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 [2021-12-18 20:54:53,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:53,313 INFO L225 Difference]: With dead ends: 9699 [2021-12-18 20:54:53,313 INFO L226 Difference]: Without dead ends: 9699 [2021-12-18 20:54:53,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=511, Invalid=2459, Unknown=0, NotChecked=0, Total=2970 [2021-12-18 20:54:53,314 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 1965 mSDsluCounter, 2247 mSDsCounter, 0 mSdLazyCounter, 1795 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1966 SdHoareTripleChecker+Valid, 2380 SdHoareTripleChecker+Invalid, 1882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:53,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1966 Valid, 2380 Invalid, 1882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1795 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-18 20:54:53,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9699 states. [2021-12-18 20:54:53,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9699 to 7900. [2021-12-18 20:54:53,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7900 states, 7466 states have (on average 1.3556121082239485) internal successors, (10121), 7604 states have internal predecessors, (10121), 375 states have call successors, (375), 22 states have call predecessors, (375), 22 states have return successors, (375), 273 states have call predecessors, (375), 375 states have call successors, (375) [2021-12-18 20:54:53,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 10871 transitions. [2021-12-18 20:54:53,413 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 10871 transitions. Word has length 57 [2021-12-18 20:54:53,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:53,413 INFO L470 AbstractCegarLoop]: Abstraction has 7900 states and 10871 transitions. [2021-12-18 20:54:53,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.3125) internal successors, (106), 29 states have internal predecessors, (106), 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) [2021-12-18 20:54:53,414 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 10871 transitions. [2021-12-18 20:54:53,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-18 20:54:53,414 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:53,415 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, 1] [2021-12-18 20:54:53,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-18 20:54:53,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-12-18 20:54:53,631 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:53,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:53,632 INFO L85 PathProgramCache]: Analyzing trace with hash 287950749, now seen corresponding path program 1 times [2021-12-18 20:54:53,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:53,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415620091] [2021-12-18 20:54:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:53,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:53,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:53,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:53,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:53,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415620091] [2021-12-18 20:54:53,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415620091] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:54:53,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287495482] [2021-12-18 20:54:53,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:53,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:53,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:54:53,669 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:54:53,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-18 20:54:53,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:53,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 20:54:53,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:54:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:53,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:54:53,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287495482] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:53,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:54:53,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-12-18 20:54:53,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713647672] [2021-12-18 20:54:53,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:53,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:54:53,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:53,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:54:53,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:54:53,917 INFO L87 Difference]: Start difference. First operand 7900 states and 10871 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2021-12-18 20:54:53,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:53,972 INFO L93 Difference]: Finished difference Result 9130 states and 12476 transitions. [2021-12-18 20:54:53,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:54:53,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 57 [2021-12-18 20:54:53,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:53,985 INFO L225 Difference]: With dead ends: 9130 [2021-12-18 20:54:53,985 INFO L226 Difference]: Without dead ends: 9130 [2021-12-18 20:54:53,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:54:53,986 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 243 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:53,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 365 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:54:53,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9130 states. [2021-12-18 20:54:54,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9130 to 8652. [2021-12-18 20:54:54,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8652 states, 8192 states have (on average 1.34765625) internal successors, (11040), 8330 states have internal predecessors, (11040), 401 states have call successors, (401), 22 states have call predecessors, (401), 22 states have return successors, (401), 299 states have call predecessors, (401), 401 states have call successors, (401) [2021-12-18 20:54:54,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8652 states to 8652 states and 11842 transitions. [2021-12-18 20:54:54,086 INFO L78 Accepts]: Start accepts. Automaton has 8652 states and 11842 transitions. Word has length 57 [2021-12-18 20:54:54,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:54,087 INFO L470 AbstractCegarLoop]: Abstraction has 8652 states and 11842 transitions. [2021-12-18 20:54:54,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2021-12-18 20:54:54,087 INFO L276 IsEmpty]: Start isEmpty. Operand 8652 states and 11842 transitions. [2021-12-18 20:54:54,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-18 20:54:54,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:54,088 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, 1, 1] [2021-12-18 20:54:54,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-18 20:54:54,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:54,304 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:54,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:54,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1083931757, now seen corresponding path program 1 times [2021-12-18 20:54:54,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:54,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336766902] [2021-12-18 20:54:54,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:54,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:54,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:54,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:54,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 20:54:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:54:54,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:54,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336766902] [2021-12-18 20:54:54,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336766902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:54,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:54,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-18 20:54:54,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066863422] [2021-12-18 20:54:54,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:54,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 20:54:54,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:54,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 20:54:54,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-12-18 20:54:54,777 INFO L87 Difference]: Start difference. First operand 8652 states and 11842 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 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) [2021-12-18 20:54:56,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:56,040 INFO L93 Difference]: Finished difference Result 16087 states and 22490 transitions. [2021-12-18 20:54:56,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 20:54:56,042 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 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 58 [2021-12-18 20:54:56,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:56,061 INFO L225 Difference]: With dead ends: 16087 [2021-12-18 20:54:56,061 INFO L226 Difference]: Without dead ends: 16073 [2021-12-18 20:54:56,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2021-12-18 20:54:56,062 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 1890 mSDsluCounter, 2200 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1890 SdHoareTripleChecker+Valid, 2466 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:56,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1890 Valid, 2466 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 20:54:56,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16073 states. [2021-12-18 20:54:56,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16073 to 8397. [2021-12-18 20:54:56,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8397 states, 7951 states have (on average 1.3439818890705573) internal successors, (10686), 8087 states have internal predecessors, (10686), 388 states have call successors, (388), 21 states have call predecessors, (388), 21 states have return successors, (388), 288 states have call predecessors, (388), 388 states have call successors, (388) [2021-12-18 20:54:56,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8397 states to 8397 states and 11462 transitions. [2021-12-18 20:54:56,193 INFO L78 Accepts]: Start accepts. Automaton has 8397 states and 11462 transitions. Word has length 58 [2021-12-18 20:54:56,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:56,194 INFO L470 AbstractCegarLoop]: Abstraction has 8397 states and 11462 transitions. [2021-12-18 20:54:56,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 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) [2021-12-18 20:54:56,194 INFO L276 IsEmpty]: Start isEmpty. Operand 8397 states and 11462 transitions. [2021-12-18 20:54:56,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-18 20:54:56,195 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:56,195 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, 1, 1, 1] [2021-12-18 20:54:56,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-12-18 20:54:56,195 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:56,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:56,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1844221281, now seen corresponding path program 1 times [2021-12-18 20:54:56,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:56,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205192345] [2021-12-18 20:54:56,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:56,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:56,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:56,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:56,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:56,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205192345] [2021-12-18 20:54:56,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205192345] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:56,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:56,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-18 20:54:56,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54832486] [2021-12-18 20:54:56,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:56,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 20:54:56,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:56,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 20:54:56,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-12-18 20:54:56,572 INFO L87 Difference]: Start difference. First operand 8397 states and 11462 transitions. Second operand has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 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) [2021-12-18 20:54:57,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:57,484 INFO L93 Difference]: Finished difference Result 9724 states and 13426 transitions. [2021-12-18 20:54:57,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 20:54:57,485 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 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 59 [2021-12-18 20:54:57,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:57,498 INFO L225 Difference]: With dead ends: 9724 [2021-12-18 20:54:57,499 INFO L226 Difference]: Without dead ends: 9724 [2021-12-18 20:54:57,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2021-12-18 20:54:57,499 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 1239 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:57,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1241 Valid, 1216 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 20:54:57,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9724 states. [2021-12-18 20:54:57,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9724 to 8676. [2021-12-18 20:54:57,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8676 states, 8216 states have (on average 1.3439629990262902) internal successors, (11042), 8354 states have internal predecessors, (11042), 401 states have call successors, (401), 22 states have call predecessors, (401), 22 states have return successors, (401), 299 states have call predecessors, (401), 401 states have call successors, (401) [2021-12-18 20:54:57,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8676 states to 8676 states and 11844 transitions. [2021-12-18 20:54:57,607 INFO L78 Accepts]: Start accepts. Automaton has 8676 states and 11844 transitions. Word has length 59 [2021-12-18 20:54:57,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:57,607 INFO L470 AbstractCegarLoop]: Abstraction has 8676 states and 11844 transitions. [2021-12-18 20:54:57,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 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) [2021-12-18 20:54:57,607 INFO L276 IsEmpty]: Start isEmpty. Operand 8676 states and 11844 transitions. [2021-12-18 20:54:57,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-18 20:54:57,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:57,608 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, 1, 1, 1] [2021-12-18 20:54:57,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-12-18 20:54:57,608 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:57,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:57,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1034874655, now seen corresponding path program 1 times [2021-12-18 20:54:57,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:57,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879270124] [2021-12-18 20:54:57,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:57,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:57,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:57,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:57,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:57,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:57,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:57,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879270124] [2021-12-18 20:54:57,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879270124] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:57,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:57,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-18 20:54:57,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981360040] [2021-12-18 20:54:57,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:57,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 20:54:57,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:57,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 20:54:57,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-18 20:54:57,810 INFO L87 Difference]: Start difference. First operand 8676 states and 11844 transitions. Second operand has 11 states, 10 states have (on average 5.7) internal successors, (57), 11 states have internal predecessors, (57), 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) [2021-12-18 20:54:58,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:58,234 INFO L93 Difference]: Finished difference Result 10209 states and 14066 transitions. [2021-12-18 20:54:58,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 20:54:58,235 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.7) internal successors, (57), 11 states have internal predecessors, (57), 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 59 [2021-12-18 20:54:58,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:58,250 INFO L225 Difference]: With dead ends: 10209 [2021-12-18 20:54:58,251 INFO L226 Difference]: Without dead ends: 10209 [2021-12-18 20:54:58,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2021-12-18 20:54:58,251 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 940 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:58,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [940 Valid, 866 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:54:58,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10209 states. [2021-12-18 20:54:58,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10209 to 8676. [2021-12-18 20:54:58,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8676 states, 8216 states have (on average 1.3439629990262902) internal successors, (11042), 8354 states have internal predecessors, (11042), 401 states have call successors, (401), 22 states have call predecessors, (401), 22 states have return successors, (401), 299 states have call predecessors, (401), 401 states have call successors, (401) [2021-12-18 20:54:58,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8676 states to 8676 states and 11844 transitions. [2021-12-18 20:54:58,355 INFO L78 Accepts]: Start accepts. Automaton has 8676 states and 11844 transitions. Word has length 59 [2021-12-18 20:54:58,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:58,355 INFO L470 AbstractCegarLoop]: Abstraction has 8676 states and 11844 transitions. [2021-12-18 20:54:58,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.7) internal successors, (57), 11 states have internal predecessors, (57), 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) [2021-12-18 20:54:58,355 INFO L276 IsEmpty]: Start isEmpty. Operand 8676 states and 11844 transitions. [2021-12-18 20:54:58,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-18 20:54:58,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:58,356 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, 1, 1, 1, 1] [2021-12-18 20:54:58,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-12-18 20:54:58,356 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:58,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:58,357 INFO L85 PathProgramCache]: Analyzing trace with hash -2010992519, now seen corresponding path program 1 times [2021-12-18 20:54:58,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:58,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188844318] [2021-12-18 20:54:58,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:58,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:58,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:58,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:58,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:58,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 20:54:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:58,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:54:58,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:58,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188844318] [2021-12-18 20:54:58,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188844318] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:54:58,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698794081] [2021-12-18 20:54:58,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:58,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:58,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:54:58,568 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:54:58,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-18 20:54:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:58,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-18 20:54:58,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:54:59,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:54:59,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:54:59,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698794081] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:59,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:54:59,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 16 [2021-12-18 20:54:59,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116149934] [2021-12-18 20:54:59,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:59,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 20:54:59,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:59,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 20:54:59,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-12-18 20:54:59,160 INFO L87 Difference]: Start difference. First operand 8676 states and 11844 transitions. Second operand has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:54:59,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:59,561 INFO L93 Difference]: Finished difference Result 10870 states and 14782 transitions. [2021-12-18 20:54:59,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 20:54:59,561 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2021-12-18 20:54:59,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:59,575 INFO L225 Difference]: With dead ends: 10870 [2021-12-18 20:54:59,575 INFO L226 Difference]: Without dead ends: 10870 [2021-12-18 20:54:59,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-12-18 20:54:59,576 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 1018 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1018 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:59,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1018 Valid, 577 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:54:59,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10870 states. [2021-12-18 20:54:59,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10870 to 8674. [2021-12-18 20:54:59,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8674 states, 8216 states have (on average 1.3388510223953263) internal successors, (11000), 8352 states have internal predecessors, (11000), 401 states have call successors, (401), 22 states have call predecessors, (401), 22 states have return successors, (401), 299 states have call predecessors, (401), 401 states have call successors, (401) [2021-12-18 20:54:59,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8674 states to 8674 states and 11802 transitions. [2021-12-18 20:54:59,688 INFO L78 Accepts]: Start accepts. Automaton has 8674 states and 11802 transitions. Word has length 60 [2021-12-18 20:54:59,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:54:59,689 INFO L470 AbstractCegarLoop]: Abstraction has 8674 states and 11802 transitions. [2021-12-18 20:54:59,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:54:59,689 INFO L276 IsEmpty]: Start isEmpty. Operand 8674 states and 11802 transitions. [2021-12-18 20:54:59,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-18 20:54:59,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:54:59,690 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, 1, 1, 1] [2021-12-18 20:54:59,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-18 20:54:59,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:54:59,911 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:54:59,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:54:59,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1895327591, now seen corresponding path program 1 times [2021-12-18 20:54:59,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:54:59,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782421072] [2021-12-18 20:54:59,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:54:59,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:54:59,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:59,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:54:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:59,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-18 20:54:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:54:59,941 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:54:59,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:54:59,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782421072] [2021-12-18 20:54:59,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782421072] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:54:59,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:54:59,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:54:59,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690643258] [2021-12-18 20:54:59,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:54:59,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 20:54:59,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:54:59,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 20:54:59,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:54:59,943 INFO L87 Difference]: Start difference. First operand 8674 states and 11802 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2021-12-18 20:54:59,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:54:59,967 INFO L93 Difference]: Finished difference Result 8674 states and 11748 transitions. [2021-12-18 20:54:59,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 20:54:59,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 60 [2021-12-18 20:54:59,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:54:59,978 INFO L225 Difference]: With dead ends: 8674 [2021-12-18 20:54:59,979 INFO L226 Difference]: Without dead ends: 8674 [2021-12-18 20:54:59,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:54:59,979 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 0 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:54:59,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 310 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:54:59,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8674 states. [2021-12-18 20:55:00,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8674 to 8674. [2021-12-18 20:55:00,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8674 states, 8216 states have (on average 1.3322784810126582) internal successors, (10946), 8352 states have internal predecessors, (10946), 401 states have call successors, (401), 22 states have call predecessors, (401), 22 states have return successors, (401), 299 states have call predecessors, (401), 401 states have call successors, (401) [2021-12-18 20:55:00,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8674 states to 8674 states and 11748 transitions. [2021-12-18 20:55:00,052 INFO L78 Accepts]: Start accepts. Automaton has 8674 states and 11748 transitions. Word has length 60 [2021-12-18 20:55:00,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:55:00,052 INFO L470 AbstractCegarLoop]: Abstraction has 8674 states and 11748 transitions. [2021-12-18 20:55:00,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2021-12-18 20:55:00,053 INFO L276 IsEmpty]: Start isEmpty. Operand 8674 states and 11748 transitions. [2021-12-18 20:55:00,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-18 20:55:00,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:55:00,054 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:55:00,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-12-18 20:55:00,054 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:55:00,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:55:00,054 INFO L85 PathProgramCache]: Analyzing trace with hash -25117949, now seen corresponding path program 1 times [2021-12-18 20:55:00,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:55:00,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778493191] [2021-12-18 20:55:00,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:00,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:55:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:00,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:55:00,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:00,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:55:00,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778493191] [2021-12-18 20:55:00,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778493191] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:55:00,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757984597] [2021-12-18 20:55:00,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:00,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:55:00,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:55:00,100 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:55:00,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-18 20:55:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:00,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 20:55:00,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:55:00,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:00,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:55:00,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:00,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757984597] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:55:00,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:55:00,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2021-12-18 20:55:00,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588403743] [2021-12-18 20:55:00,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:55:00,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 20:55:00,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:55:00,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 20:55:00,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:55:00,470 INFO L87 Difference]: Start difference. First operand 8674 states and 11748 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 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) [2021-12-18 20:55:00,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:55:00,533 INFO L93 Difference]: Finished difference Result 18803 states and 25174 transitions. [2021-12-18 20:55:00,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 20:55:00,534 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 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 62 [2021-12-18 20:55:00,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:55:00,563 INFO L225 Difference]: With dead ends: 18803 [2021-12-18 20:55:00,564 INFO L226 Difference]: Without dead ends: 18803 [2021-12-18 20:55:00,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:55:00,564 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 361 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:55:00,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 989 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:55:00,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18803 states. [2021-12-18 20:55:00,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18803 to 13974. [2021-12-18 20:55:00,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13974 states, 13264 states have (on average 1.3167973462002414) internal successors, (17466), 13422 states have internal predecessors, (17466), 653 states have call successors, (653), 22 states have call predecessors, (653), 22 states have return successors, (653), 529 states have call predecessors, (653), 653 states have call successors, (653) [2021-12-18 20:55:00,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13974 states to 13974 states and 18772 transitions. [2021-12-18 20:55:00,758 INFO L78 Accepts]: Start accepts. Automaton has 13974 states and 18772 transitions. Word has length 62 [2021-12-18 20:55:00,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:55:00,758 INFO L470 AbstractCegarLoop]: Abstraction has 13974 states and 18772 transitions. [2021-12-18 20:55:00,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 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) [2021-12-18 20:55:00,759 INFO L276 IsEmpty]: Start isEmpty. Operand 13974 states and 18772 transitions. [2021-12-18 20:55:00,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-18 20:55:00,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:55:00,760 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:55:00,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-18 20:55:00,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:55:00,974 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:55:00,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:55:00,974 INFO L85 PathProgramCache]: Analyzing trace with hash 279048111, now seen corresponding path program 1 times [2021-12-18 20:55:00,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:55:00,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988934277] [2021-12-18 20:55:00,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:00,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:55:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:01,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:55:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:01,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-18 20:55:01,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:01,012 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 20:55:01,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:55:01,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988934277] [2021-12-18 20:55:01,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988934277] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:55:01,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:55:01,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 20:55:01,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350681621] [2021-12-18 20:55:01,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:55:01,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:55:01,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:55:01,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:55:01,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:55:01,017 INFO L87 Difference]: Start difference. First operand 13974 states and 18772 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 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) [2021-12-18 20:55:01,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:55:01,098 INFO L93 Difference]: Finished difference Result 28033 states and 37822 transitions. [2021-12-18 20:55:01,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:55:01,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 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 63 [2021-12-18 20:55:01,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:55:01,151 INFO L225 Difference]: With dead ends: 28033 [2021-12-18 20:55:01,151 INFO L226 Difference]: Without dead ends: 28033 [2021-12-18 20:55:01,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:55:01,154 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 275 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:55:01,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 704 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:55:01,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28033 states. [2021-12-18 20:55:01,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28033 to 14040. [2021-12-18 20:55:01,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14040 states, 13330 states have (on average 1.3152288072018004) internal successors, (17532), 13488 states have internal predecessors, (17532), 653 states have call successors, (653), 22 states have call predecessors, (653), 22 states have return successors, (653), 529 states have call predecessors, (653), 653 states have call successors, (653) [2021-12-18 20:55:01,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14040 states to 14040 states and 18838 transitions. [2021-12-18 20:55:01,514 INFO L78 Accepts]: Start accepts. Automaton has 14040 states and 18838 transitions. Word has length 63 [2021-12-18 20:55:01,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:55:01,515 INFO L470 AbstractCegarLoop]: Abstraction has 14040 states and 18838 transitions. [2021-12-18 20:55:01,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 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) [2021-12-18 20:55:01,516 INFO L276 IsEmpty]: Start isEmpty. Operand 14040 states and 18838 transitions. [2021-12-18 20:55:01,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-18 20:55:01,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:55:01,517 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:55:01,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-12-18 20:55:01,517 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:55:01,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:55:01,518 INFO L85 PathProgramCache]: Analyzing trace with hash 279048173, now seen corresponding path program 1 times [2021-12-18 20:55:01,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:55:01,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637349562] [2021-12-18 20:55:01,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:01,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:55:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:01,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:55:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:01,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-18 20:55:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:55:01,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:55:01,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637349562] [2021-12-18 20:55:01,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637349562] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:55:01,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:55:01,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 20:55:01,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170536319] [2021-12-18 20:55:01,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:55:01,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 20:55:01,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:55:01,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 20:55:01,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 20:55:01,563 INFO L87 Difference]: Start difference. First operand 14040 states and 18838 transitions. Second operand has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 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) [2021-12-18 20:55:01,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:55:01,773 INFO L93 Difference]: Finished difference Result 15414 states and 20736 transitions. [2021-12-18 20:55:01,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 20:55:01,774 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 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 63 [2021-12-18 20:55:01,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:55:01,800 INFO L225 Difference]: With dead ends: 15414 [2021-12-18 20:55:01,800 INFO L226 Difference]: Without dead ends: 15414 [2021-12-18 20:55:01,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-18 20:55:01,801 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 141 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:55:01,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 631 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:55:01,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15414 states. [2021-12-18 20:55:01,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15414 to 14040. [2021-12-18 20:55:01,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14040 states, 13330 states have (on average 1.3127531882970742) internal successors, (17499), 13488 states have internal predecessors, (17499), 653 states have call successors, (653), 22 states have call predecessors, (653), 22 states have return successors, (653), 529 states have call predecessors, (653), 653 states have call successors, (653) [2021-12-18 20:55:01,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14040 states to 14040 states and 18805 transitions. [2021-12-18 20:55:01,981 INFO L78 Accepts]: Start accepts. Automaton has 14040 states and 18805 transitions. Word has length 63 [2021-12-18 20:55:01,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:55:01,982 INFO L470 AbstractCegarLoop]: Abstraction has 14040 states and 18805 transitions. [2021-12-18 20:55:01,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 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) [2021-12-18 20:55:01,982 INFO L276 IsEmpty]: Start isEmpty. Operand 14040 states and 18805 transitions. [2021-12-18 20:55:01,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-18 20:55:01,983 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:55:01,983 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:55:01,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-12-18 20:55:01,983 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:55:01,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:55:01,984 INFO L85 PathProgramCache]: Analyzing trace with hash 279048174, now seen corresponding path program 1 times [2021-12-18 20:55:01,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:55:01,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046365825] [2021-12-18 20:55:01,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:01,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:55:01,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:02,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:55:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:02,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-18 20:55:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:55:02,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:55:02,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046365825] [2021-12-18 20:55:02,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046365825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:55:02,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:55:02,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 20:55:02,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602984476] [2021-12-18 20:55:02,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:55:02,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 20:55:02,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:55:02,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 20:55:02,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 20:55:02,052 INFO L87 Difference]: Start difference. First operand 14040 states and 18805 transitions. Second operand has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 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) [2021-12-18 20:55:02,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:55:02,255 INFO L93 Difference]: Finished difference Result 14036 states and 18607 transitions. [2021-12-18 20:55:02,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 20:55:02,255 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 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 63 [2021-12-18 20:55:02,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:55:02,313 INFO L225 Difference]: With dead ends: 14036 [2021-12-18 20:55:02,313 INFO L226 Difference]: Without dead ends: 14036 [2021-12-18 20:55:02,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-18 20:55:02,314 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 145 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:55:02,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 582 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:55:02,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14036 states. [2021-12-18 20:55:02,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14036 to 14036. [2021-12-18 20:55:02,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14036 states, 13330 states have (on average 1.2978994748687172) internal successors, (17301), 13484 states have internal predecessors, (17301), 653 states have call successors, (653), 22 states have call predecessors, (653), 22 states have return successors, (653), 529 states have call predecessors, (653), 653 states have call successors, (653) [2021-12-18 20:55:02,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14036 states to 14036 states and 18607 transitions. [2021-12-18 20:55:02,462 INFO L78 Accepts]: Start accepts. Automaton has 14036 states and 18607 transitions. Word has length 63 [2021-12-18 20:55:02,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:55:02,462 INFO L470 AbstractCegarLoop]: Abstraction has 14036 states and 18607 transitions. [2021-12-18 20:55:02,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 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) [2021-12-18 20:55:02,462 INFO L276 IsEmpty]: Start isEmpty. Operand 14036 states and 18607 transitions. [2021-12-18 20:55:02,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-18 20:55:02,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:55:02,463 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:55:02,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-12-18 20:55:02,463 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:55:02,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:55:02,464 INFO L85 PathProgramCache]: Analyzing trace with hash -778657640, now seen corresponding path program 1 times [2021-12-18 20:55:02,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:55:02,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213942787] [2021-12-18 20:55:02,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:02,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:55:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:03,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:55:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:03,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:03,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:55:03,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213942787] [2021-12-18 20:55:03,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213942787] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:55:03,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136872285] [2021-12-18 20:55:03,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:55:03,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:55:03,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:55:03,269 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:55:03,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-18 20:55:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:55:03,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-18 20:55:03,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:55:03,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 20:55:04,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:55:04,008 INFO L388 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 43 treesize of output 34 [2021-12-18 20:55:04,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 15 [2021-12-18 20:55:04,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 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 5 [2021-12-18 20:55:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:55:04,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:55:04,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 366 treesize of output 334 [2021-12-18 20:55:05,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 294 treesize of output 278 [2021-12-18 20:55:52,343 WARN L227 SmtUtils]: Spent 42.14s on a formula simplification. DAG size of input: 65 DAG size of output: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 20:56:14,711 WARN L227 SmtUtils]: Spent 18.05s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 20:56:34,449 WARN L227 SmtUtils]: Spent 17.04s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 20:56:37,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136872285] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:56:37,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:56:37,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2021-12-18 20:56:37,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665930964] [2021-12-18 20:56:37,462 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:56:37,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-18 20:56:37,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:56:37,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-18 20:56:37,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1286, Unknown=3, NotChecked=0, Total=1406 [2021-12-18 20:56:37,463 INFO L87 Difference]: Start difference. First operand 14036 states and 18607 transitions. Second operand has 30 states, 29 states have (on average 4.0) internal successors, (116), 28 states have internal predecessors, (116), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:56:38,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:56:38,097 INFO L93 Difference]: Finished difference Result 14082 states and 18666 transitions. [2021-12-18 20:56:38,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 20:56:38,097 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.0) internal successors, (116), 28 states have internal predecessors, (116), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2021-12-18 20:56:38,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:56:38,111 INFO L225 Difference]: With dead ends: 14082 [2021-12-18 20:56:38,111 INFO L226 Difference]: Without dead ends: 14071 [2021-12-18 20:56:38,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 88.5s TimeCoverageRelationStatistics Valid=177, Invalid=1800, Unknown=3, NotChecked=0, Total=1980 [2021-12-18 20:56:38,112 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 153 mSDsluCounter, 2264 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 2412 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 287 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:56:38,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 2412 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 659 Invalid, 0 Unknown, 287 Unchecked, 0.4s Time] [2021-12-18 20:56:38,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14071 states. [2021-12-18 20:56:38,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14071 to 14064. [2021-12-18 20:56:38,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14064 states, 13358 states have (on average 1.297799071717323) internal successors, (17336), 13512 states have internal predecessors, (17336), 653 states have call successors, (653), 22 states have call predecessors, (653), 22 states have return successors, (653), 529 states have call predecessors, (653), 653 states have call successors, (653) [2021-12-18 20:56:38,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14064 states to 14064 states and 18642 transitions. [2021-12-18 20:56:38,267 INFO L78 Accepts]: Start accepts. Automaton has 14064 states and 18642 transitions. Word has length 63 [2021-12-18 20:56:38,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:56:38,267 INFO L470 AbstractCegarLoop]: Abstraction has 14064 states and 18642 transitions. [2021-12-18 20:56:38,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.0) internal successors, (116), 28 states have internal predecessors, (116), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:56:38,267 INFO L276 IsEmpty]: Start isEmpty. Operand 14064 states and 18642 transitions. [2021-12-18 20:56:38,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-18 20:56:38,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:56:38,268 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:56:38,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-18 20:56:38,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:56:38,483 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:56:38,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:56:38,484 INFO L85 PathProgramCache]: Analyzing trace with hash -520492202, now seen corresponding path program 1 times [2021-12-18 20:56:38,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:56:38,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582992621] [2021-12-18 20:56:38,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:56:38,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:56:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:56:38,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:56:38,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:56:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:56:38,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:56:38,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582992621] [2021-12-18 20:56:38,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582992621] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:56:38,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198198186] [2021-12-18 20:56:38,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:56:38,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:56:38,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:56:38,810 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:56:38,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-18 20:56:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:56:38,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-18 20:56:38,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:56:39,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 20:56:39,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:56:39,839 INFO L388 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 39 treesize of output 15 [2021-12-18 20:56:39,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 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 5 [2021-12-18 20:56:39,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:56:39,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:56:40,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2021-12-18 20:56:40,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 58 [2021-12-18 20:57:18,307 WARN L227 SmtUtils]: Spent 36.16s on a formula simplification. DAG size of input: 38 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 20:57:34,554 WARN L227 SmtUtils]: Spent 16.05s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 20:57:54,852 WARN L227 SmtUtils]: Spent 18.13s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 20:58:17,058 WARN L227 SmtUtils]: Spent 18.11s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 20:58:39,464 WARN L227 SmtUtils]: Spent 16.21s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-18 20:58:40,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198198186] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:58:40,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:58:40,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-12-18 20:58:40,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703315166] [2021-12-18 20:58:40,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:58:40,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-18 20:58:40,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:58:40,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-18 20:58:40,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=817, Unknown=7, NotChecked=0, Total=930 [2021-12-18 20:58:40,777 INFO L87 Difference]: Start difference. First operand 14064 states and 18642 transitions. Second operand has 23 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 23 states have internal predecessors, (116), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:58:41,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:58:41,177 INFO L93 Difference]: Finished difference Result 14081 states and 18664 transitions. [2021-12-18 20:58:41,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 20:58:41,178 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 23 states have internal predecessors, (116), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2021-12-18 20:58:41,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:58:41,196 INFO L225 Difference]: With dead ends: 14081 [2021-12-18 20:58:41,197 INFO L226 Difference]: Without dead ends: 14068 [2021-12-18 20:58:41,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 119.5s TimeCoverageRelationStatistics Valid=154, Invalid=1171, Unknown=7, NotChecked=0, Total=1332 [2021-12-18 20:58:41,197 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 143 mSDsluCounter, 1646 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 1796 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:58:41,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 1796 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 458 Invalid, 0 Unknown, 194 Unchecked, 0.2s Time] [2021-12-18 20:58:41,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14068 states. [2021-12-18 20:58:41,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14068 to 14062. [2021-12-18 20:58:41,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14062 states, 13356 states have (on average 1.2976939203354299) internal successors, (17332), 13510 states have internal predecessors, (17332), 653 states have call successors, (653), 22 states have call predecessors, (653), 22 states have return successors, (653), 529 states have call predecessors, (653), 653 states have call successors, (653) [2021-12-18 20:58:41,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14062 states to 14062 states and 18638 transitions. [2021-12-18 20:58:41,332 INFO L78 Accepts]: Start accepts. Automaton has 14062 states and 18638 transitions. Word has length 63 [2021-12-18 20:58:41,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:58:41,332 INFO L470 AbstractCegarLoop]: Abstraction has 14062 states and 18638 transitions. [2021-12-18 20:58:41,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 23 states have internal predecessors, (116), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:58:41,333 INFO L276 IsEmpty]: Start isEmpty. Operand 14062 states and 18638 transitions. [2021-12-18 20:58:41,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-18 20:58:41,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:58:41,333 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:58:41,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-18 20:58:41,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:58:41,534 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:58:41,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:58:41,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1581065855, now seen corresponding path program 1 times [2021-12-18 20:58:41,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:58:41,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360352313] [2021-12-18 20:58:41,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:41,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:58:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:41,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:58:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:41,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 20:58:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:58:41,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:58:41,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360352313] [2021-12-18 20:58:41,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360352313] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:58:41,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:58:41,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-18 20:58:41,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106682028] [2021-12-18 20:58:41,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:58:41,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 20:58:41,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:58:41,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 20:58:41,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-12-18 20:58:41,749 INFO L87 Difference]: Start difference. First operand 14062 states and 18638 transitions. Second operand has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 13 states have internal predecessors, (58), 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) [2021-12-18 20:58:42,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:58:42,266 INFO L93 Difference]: Finished difference Result 16440 states and 21716 transitions. [2021-12-18 20:58:42,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 20:58:42,267 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 13 states have internal predecessors, (58), 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 64 [2021-12-18 20:58:42,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:58:42,283 INFO L225 Difference]: With dead ends: 16440 [2021-12-18 20:58:42,283 INFO L226 Difference]: Without dead ends: 16440 [2021-12-18 20:58:42,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=466, Unknown=0, NotChecked=0, Total=650 [2021-12-18 20:58:42,284 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 918 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:58:42,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 1547 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 20:58:42,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16440 states. [2021-12-18 20:58:42,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16440 to 14223. [2021-12-18 20:58:42,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14223 states, 13517 states have (on average 1.297995117259747) internal successors, (17545), 13671 states have internal predecessors, (17545), 653 states have call successors, (653), 22 states have call predecessors, (653), 22 states have return successors, (653), 529 states have call predecessors, (653), 653 states have call successors, (653) [2021-12-18 20:58:42,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14223 states to 14223 states and 18851 transitions. [2021-12-18 20:58:42,455 INFO L78 Accepts]: Start accepts. Automaton has 14223 states and 18851 transitions. Word has length 64 [2021-12-18 20:58:42,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:58:42,455 INFO L470 AbstractCegarLoop]: Abstraction has 14223 states and 18851 transitions. [2021-12-18 20:58:42,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 13 states have internal predecessors, (58), 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) [2021-12-18 20:58:42,455 INFO L276 IsEmpty]: Start isEmpty. Operand 14223 states and 18851 transitions. [2021-12-18 20:58:42,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-18 20:58:42,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:58:42,456 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:58:42,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-12-18 20:58:42,456 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:58:42,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:58:42,457 INFO L85 PathProgramCache]: Analyzing trace with hash 15703619, now seen corresponding path program 1 times [2021-12-18 20:58:42,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:58:42,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565127354] [2021-12-18 20:58:42,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:42,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:58:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:42,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:58:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:42,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-18 20:58:42,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:42,925 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:58:42,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:58:42,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565127354] [2021-12-18 20:58:42,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565127354] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:58:42,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272356936] [2021-12-18 20:58:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:42,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:58:42,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:58:42,927 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:58:42,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-18 20:58:43,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:43,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-18 20:58:43,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:58:43,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-18 20:58:43,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:58:43,508 INFO L388 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 [2021-12-18 20:58:43,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-12-18 20:58:43,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:58:43,862 INFO L388 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 37 treesize of output 19 [2021-12-18 20:58:43,927 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:58:43,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:58:44,028 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:58:44,028 INFO L388 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 41 treesize of output 45 [2021-12-18 20:58:44,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 130 [2021-12-18 20:58:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:58:44,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272356936] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:58:44,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:58:44,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 45 [2021-12-18 20:58:44,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780622850] [2021-12-18 20:58:44,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:58:44,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-18 20:58:44,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:58:44,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-18 20:58:44,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1884, Unknown=0, NotChecked=0, Total=2070 [2021-12-18 20:58:44,702 INFO L87 Difference]: Start difference. First operand 14223 states and 18851 transitions. Second operand has 46 states, 45 states have (on average 3.9555555555555557) internal successors, (178), 43 states have internal predecessors, (178), 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) [2021-12-18 20:58:48,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:58:48,101 INFO L93 Difference]: Finished difference Result 47792 states and 64310 transitions. [2021-12-18 20:58:48,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-18 20:58:48,102 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.9555555555555557) internal successors, (178), 43 states have internal predecessors, (178), 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 64 [2021-12-18 20:58:48,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:58:48,160 INFO L225 Difference]: With dead ends: 47792 [2021-12-18 20:58:48,160 INFO L226 Difference]: Without dead ends: 47792 [2021-12-18 20:58:48,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 119 SyntacticMatches, 7 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2993 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1496, Invalid=8010, Unknown=0, NotChecked=0, Total=9506 [2021-12-18 20:58:48,161 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 7031 mSDsluCounter, 3596 mSDsCounter, 0 mSdLazyCounter, 2290 mSolverCounterSat, 556 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7033 SdHoareTripleChecker+Valid, 3804 SdHoareTripleChecker+Invalid, 3046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 556 IncrementalHoareTripleChecker+Valid, 2290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:58:48,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7033 Valid, 3804 Invalid, 3046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [556 Valid, 2290 Invalid, 0 Unknown, 200 Unchecked, 1.4s Time] [2021-12-18 20:58:48,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47792 states. [2021-12-18 20:58:48,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47792 to 15872. [2021-12-18 20:58:48,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15872 states, 15116 states have (on average 1.302857898915057) internal successors, (19694), 15269 states have internal predecessors, (19694), 702 states have call successors, (702), 24 states have call predecessors, (702), 24 states have return successors, (702), 578 states have call predecessors, (702), 702 states have call successors, (702) [2021-12-18 20:58:48,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15872 states to 15872 states and 21098 transitions. [2021-12-18 20:58:48,433 INFO L78 Accepts]: Start accepts. Automaton has 15872 states and 21098 transitions. Word has length 64 [2021-12-18 20:58:48,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:58:48,433 INFO L470 AbstractCegarLoop]: Abstraction has 15872 states and 21098 transitions. [2021-12-18 20:58:48,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.9555555555555557) internal successors, (178), 43 states have internal predecessors, (178), 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) [2021-12-18 20:58:48,434 INFO L276 IsEmpty]: Start isEmpty. Operand 15872 states and 21098 transitions. [2021-12-18 20:58:48,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-18 20:58:48,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:58:48,435 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:58:48,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-18 20:58:48,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:58:48,644 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:58:48,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:58:48,645 INFO L85 PathProgramCache]: Analyzing trace with hash 15703618, now seen corresponding path program 1 times [2021-12-18 20:58:48,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:58:48,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963053478] [2021-12-18 20:58:48,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:48,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:58:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:48,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:58:48,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:48,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-18 20:58:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:58:48,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:58:48,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963053478] [2021-12-18 20:58:48,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963053478] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:58:48,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:58:48,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 20:58:48,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218320744] [2021-12-18 20:58:48,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:58:48,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 20:58:48,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:58:48,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 20:58:48,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 20:58:48,738 INFO L87 Difference]: Start difference. First operand 15872 states and 21098 transitions. Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 6 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) [2021-12-18 20:58:49,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:58:49,050 INFO L93 Difference]: Finished difference Result 24933 states and 32975 transitions. [2021-12-18 20:58:49,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 20:58:49,051 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 6 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 64 [2021-12-18 20:58:49,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:58:49,091 INFO L225 Difference]: With dead ends: 24933 [2021-12-18 20:58:49,091 INFO L226 Difference]: Without dead ends: 24933 [2021-12-18 20:58:49,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-18 20:58:49,092 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 118 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:58:49,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 846 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:58:49,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24933 states. [2021-12-18 20:58:49,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24933 to 15870. [2021-12-18 20:58:49,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15870 states, 15116 states have (on average 1.2920084678486372) internal successors, (19530), 15267 states have internal predecessors, (19530), 702 states have call successors, (702), 24 states have call predecessors, (702), 24 states have return successors, (702), 578 states have call predecessors, (702), 702 states have call successors, (702) [2021-12-18 20:58:49,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15870 states to 15870 states and 20934 transitions. [2021-12-18 20:58:49,302 INFO L78 Accepts]: Start accepts. Automaton has 15870 states and 20934 transitions. Word has length 64 [2021-12-18 20:58:49,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:58:49,302 INFO L470 AbstractCegarLoop]: Abstraction has 15870 states and 20934 transitions. [2021-12-18 20:58:49,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 6 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) [2021-12-18 20:58:49,302 INFO L276 IsEmpty]: Start isEmpty. Operand 15870 states and 20934 transitions. [2021-12-18 20:58:49,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-18 20:58:49,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:58:49,303 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:58:49,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-12-18 20:58:49,303 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:58:49,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:58:49,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1768401507, now seen corresponding path program 1 times [2021-12-18 20:58:49,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:58:49,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692320150] [2021-12-18 20:58:49,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:49,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:58:49,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:49,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:58:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:49,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 20:58:49,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:58:49,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:58:49,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692320150] [2021-12-18 20:58:49,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692320150] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:58:49,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:58:49,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-18 20:58:49,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677178999] [2021-12-18 20:58:49,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:58:49,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 20:58:49,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:58:49,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 20:58:49,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-12-18 20:58:49,546 INFO L87 Difference]: Start difference. First operand 15870 states and 20934 transitions. Second operand has 13 states, 12 states have (on average 4.916666666666667) internal successors, (59), 13 states have internal predecessors, (59), 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) [2021-12-18 20:58:50,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:58:50,261 INFO L93 Difference]: Finished difference Result 18349 states and 24144 transitions. [2021-12-18 20:58:50,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 20:58:50,261 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.916666666666667) internal successors, (59), 13 states have internal predecessors, (59), 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 65 [2021-12-18 20:58:50,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:58:50,280 INFO L225 Difference]: With dead ends: 18349 [2021-12-18 20:58:50,280 INFO L226 Difference]: Without dead ends: 18349 [2021-12-18 20:58:50,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=466, Unknown=0, NotChecked=0, Total=650 [2021-12-18 20:58:50,281 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 890 mSDsluCounter, 1217 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 1433 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:58:50,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [890 Valid, 1433 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 20:58:50,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18349 states. [2021-12-18 20:58:50,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18349 to 15923. [2021-12-18 20:58:50,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15923 states, 15169 states have (on average 1.2909222756938492) internal successors, (19582), 15320 states have internal predecessors, (19582), 702 states have call successors, (702), 24 states have call predecessors, (702), 24 states have return successors, (702), 578 states have call predecessors, (702), 702 states have call successors, (702) [2021-12-18 20:58:50,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15923 states to 15923 states and 20986 transitions. [2021-12-18 20:58:50,590 INFO L78 Accepts]: Start accepts. Automaton has 15923 states and 20986 transitions. Word has length 65 [2021-12-18 20:58:50,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:58:50,590 INFO L470 AbstractCegarLoop]: Abstraction has 15923 states and 20986 transitions. [2021-12-18 20:58:50,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.916666666666667) internal successors, (59), 13 states have internal predecessors, (59), 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) [2021-12-18 20:58:50,590 INFO L276 IsEmpty]: Start isEmpty. Operand 15923 states and 20986 transitions. [2021-12-18 20:58:50,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-18 20:58:50,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:58:50,591 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:58:50,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-12-18 20:58:50,592 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr45ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:58:50,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:58:50,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1014127871, now seen corresponding path program 1 times [2021-12-18 20:58:50,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:58:50,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851505334] [2021-12-18 20:58:50,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:50,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:58:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:50,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:58:50,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:50,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 20:58:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:50,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:58:50,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:58:50,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851505334] [2021-12-18 20:58:50,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851505334] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:58:50,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:58:50,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-18 20:58:50,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796020635] [2021-12-18 20:58:50,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:58:50,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 20:58:50,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:58:50,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 20:58:50,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-18 20:58:50,872 INFO L87 Difference]: Start difference. First operand 15923 states and 20986 transitions. Second operand has 14 states, 13 states have (on average 4.615384615384615) internal successors, (60), 14 states have internal predecessors, (60), 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) [2021-12-18 20:58:51,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:58:51,570 INFO L93 Difference]: Finished difference Result 19746 states and 26067 transitions. [2021-12-18 20:58:51,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 20:58:51,570 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.615384615384615) internal successors, (60), 14 states have internal predecessors, (60), 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 66 [2021-12-18 20:58:51,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:58:51,593 INFO L225 Difference]: With dead ends: 19746 [2021-12-18 20:58:51,593 INFO L226 Difference]: Without dead ends: 19746 [2021-12-18 20:58:51,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-12-18 20:58:51,593 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 938 mSDsluCounter, 1533 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 1742 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:58:51,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [940 Valid, 1742 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 20:58:51,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19746 states. [2021-12-18 20:58:51,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19746 to 16124. [2021-12-18 20:58:51,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16124 states, 15370 states have (on average 1.2899154196486662) internal successors, (19826), 15521 states have internal predecessors, (19826), 702 states have call successors, (702), 24 states have call predecessors, (702), 24 states have return successors, (702), 578 states have call predecessors, (702), 702 states have call successors, (702) [2021-12-18 20:58:51,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16124 states to 16124 states and 21230 transitions. [2021-12-18 20:58:51,750 INFO L78 Accepts]: Start accepts. Automaton has 16124 states and 21230 transitions. Word has length 66 [2021-12-18 20:58:51,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:58:51,751 INFO L470 AbstractCegarLoop]: Abstraction has 16124 states and 21230 transitions. [2021-12-18 20:58:51,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.615384615384615) internal successors, (60), 14 states have internal predecessors, (60), 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) [2021-12-18 20:58:51,751 INFO L276 IsEmpty]: Start isEmpty. Operand 16124 states and 21230 transitions. [2021-12-18 20:58:51,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-18 20:58:51,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:58:51,752 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:58:51,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-12-18 20:58:51,752 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:58:51,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:58:51,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1373192667, now seen corresponding path program 1 times [2021-12-18 20:58:51,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:58:51,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050222046] [2021-12-18 20:58:51,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:51,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:58:51,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:52,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:58:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:52,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 20:58:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:58:52,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:58:52,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050222046] [2021-12-18 20:58:52,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050222046] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:58:52,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054271040] [2021-12-18 20:58:52,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:52,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:58:52,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:58:52,157 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:58:52,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-18 20:58:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:52,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-18 20:58:52,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:58:52,476 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:58:52,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 11 [2021-12-18 20:58:52,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-12-18 20:58:52,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:58:52,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:58:52,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 34 [2021-12-18 20:58:53,284 INFO L388 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 30 treesize of output 12 [2021-12-18 20:58:53,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-18 20:58:53,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:58:53,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:58:53,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054271040] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:58:53,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:58:53,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15] total 26 [2021-12-18 20:58:53,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469327142] [2021-12-18 20:58:53,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:58:53,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 20:58:53,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:58:53,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 20:58:53,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2021-12-18 20:58:53,382 INFO L87 Difference]: Start difference. First operand 16124 states and 21230 transitions. Second operand has 14 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:58:56,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:58:56,602 INFO L93 Difference]: Finished difference Result 30682 states and 40667 transitions. [2021-12-18 20:58:56,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-18 20:58:56,603 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2021-12-18 20:58:56,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:58:56,655 INFO L225 Difference]: With dead ends: 30682 [2021-12-18 20:58:56,656 INFO L226 Difference]: Without dead ends: 30682 [2021-12-18 20:58:56,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=813, Invalid=2969, Unknown=0, NotChecked=0, Total=3782 [2021-12-18 20:58:56,658 INFO L933 BasicCegarLoop]: 414 mSDtfsCounter, 1499 mSDsluCounter, 2484 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1499 SdHoareTripleChecker+Valid, 2898 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:58:56,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1499 Valid, 2898 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-18 20:58:56,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30682 states. [2021-12-18 20:58:56,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30682 to 22870. [2021-12-18 20:58:56,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22870 states, 21823 states have (on average 1.2880447234569032) internal successors, (28109), 22027 states have internal predecessors, (28109), 984 states have call successors, (984), 35 states have call predecessors, (984), 35 states have return successors, (984), 807 states have call predecessors, (984), 984 states have call successors, (984) [2021-12-18 20:58:56,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22870 states to 22870 states and 30077 transitions. [2021-12-18 20:58:56,991 INFO L78 Accepts]: Start accepts. Automaton has 22870 states and 30077 transitions. Word has length 67 [2021-12-18 20:58:56,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:58:56,992 INFO L470 AbstractCegarLoop]: Abstraction has 22870 states and 30077 transitions. [2021-12-18 20:58:56,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:58:56,992 INFO L276 IsEmpty]: Start isEmpty. Operand 22870 states and 30077 transitions. [2021-12-18 20:58:56,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-18 20:58:56,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:58:56,993 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:58:57,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-18 20:58:57,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-12-18 20:58:57,194 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:58:57,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:58:57,194 INFO L85 PathProgramCache]: Analyzing trace with hash 221255347, now seen corresponding path program 1 times [2021-12-18 20:58:57,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:58:57,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716587091] [2021-12-18 20:58:57,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:57,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:58:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:58,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:58:58,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:58,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-18 20:58:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:58,842 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:58:58,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:58:58,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716587091] [2021-12-18 20:58:58,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716587091] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:58:58,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399226816] [2021-12-18 20:58:58,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:58:58,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:58:58,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:58:58,848 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:58:58,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-18 20:58:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:58:59,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 116 conjunts are in the unsatisfiable core [2021-12-18 20:58:59,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:58:59,381 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:58:59,381 INFO L388 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 [2021-12-18 20:58:59,635 INFO L388 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 [2021-12-18 20:58:59,649 INFO L388 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 [2021-12-18 20:58:59,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:58:59,786 INFO L388 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 27 treesize of output 26 [2021-12-18 20:58:59,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:58:59,791 INFO L388 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 27 treesize of output 26 [2021-12-18 20:58:59,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:58:59,882 INFO L388 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 25 treesize of output 24 [2021-12-18 20:58:59,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:58:59,895 INFO L388 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 25 treesize of output 24 [2021-12-18 20:59:00,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:59:00,023 INFO L388 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 18 treesize of output 20 [2021-12-18 20:59:00,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:59:00,031 INFO L388 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 18 treesize of output 20 [2021-12-18 20:59:00,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:59:00,235 INFO L388 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 25 treesize of output 24 [2021-12-18 20:59:00,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:59:00,239 INFO L388 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 33 treesize of output 32 [2021-12-18 20:59:00,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:59:00,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:59:00,354 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-12-18 20:59:00,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 51 [2021-12-18 20:59:00,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:59:00,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 46 [2021-12-18 20:59:01,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:59:01,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:59:01,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:59:01,891 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-18 20:59:01,891 INFO L388 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 44 [2021-12-18 20:59:01,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:59:01,900 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-12-18 20:59:01,901 INFO L388 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 20 [2021-12-18 20:59:01,936 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:59:01,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:59:02,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399226816] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:59:02,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-18 20:59:02,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 22] total 49 [2021-12-18 20:59:02,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192749539] [2021-12-18 20:59:02,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-18 20:59:02,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-18 20:59:02,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:59:02,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-18 20:59:02,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2795, Unknown=0, NotChecked=0, Total=2970 [2021-12-18 20:59:02,714 INFO L87 Difference]: Start difference. First operand 22870 states and 30077 transitions. Second operand has 49 states, 49 states have (on average 2.489795918367347) internal successors, (122), 45 states have internal predecessors, (122), 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) [2021-12-18 20:59:09,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:59:09,222 INFO L93 Difference]: Finished difference Result 31037 states and 40952 transitions. [2021-12-18 20:59:09,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-18 20:59:09,223 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.489795918367347) internal successors, (122), 45 states have internal predecessors, (122), 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 67 [2021-12-18 20:59:09,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:59:09,269 INFO L225 Difference]: With dead ends: 31037 [2021-12-18 20:59:09,269 INFO L226 Difference]: Without dead ends: 31037 [2021-12-18 20:59:09,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 64 SyntacticMatches, 7 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2514 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1178, Invalid=8524, Unknown=0, NotChecked=0, Total=9702 [2021-12-18 20:59:09,271 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 4592 mSDsluCounter, 5148 mSDsCounter, 0 mSdLazyCounter, 2408 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4594 SdHoareTripleChecker+Valid, 5352 SdHoareTripleChecker+Invalid, 2954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 2408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:59:09,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4594 Valid, 5352 Invalid, 2954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 2408 Invalid, 0 Unknown, 142 Unchecked, 1.4s Time] [2021-12-18 20:59:09,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31037 states. [2021-12-18 20:59:09,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31037 to 25526. [2021-12-18 20:59:09,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25526 states, 24375 states have (on average 1.2854153846153846) internal successors, (31332), 24591 states have internal predecessors, (31332), 1085 states have call successors, (1085), 38 states have call predecessors, (1085), 38 states have return successors, (1085), 896 states have call predecessors, (1085), 1085 states have call successors, (1085) [2021-12-18 20:59:09,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25526 states to 25526 states and 33502 transitions. [2021-12-18 20:59:09,555 INFO L78 Accepts]: Start accepts. Automaton has 25526 states and 33502 transitions. Word has length 67 [2021-12-18 20:59:09,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:59:09,555 INFO L470 AbstractCegarLoop]: Abstraction has 25526 states and 33502 transitions. [2021-12-18 20:59:09,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.489795918367347) internal successors, (122), 45 states have internal predecessors, (122), 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) [2021-12-18 20:59:09,555 INFO L276 IsEmpty]: Start isEmpty. Operand 25526 states and 33502 transitions. [2021-12-18 20:59:09,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-18 20:59:09,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:59:09,556 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:59:09,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-18 20:59:09,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:09,757 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:59:09,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:59:09,758 INFO L85 PathProgramCache]: Analyzing trace with hash 380700547, now seen corresponding path program 1 times [2021-12-18 20:59:09,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:59:09,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907730224] [2021-12-18 20:59:09,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:09,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:59:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:09,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:59:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:09,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 20:59:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:09,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:59:09,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:59:09,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907730224] [2021-12-18 20:59:09,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907730224] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:59:09,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826484154] [2021-12-18 20:59:09,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:09,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:09,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:59:09,936 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:59:09,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-18 20:59:10,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:10,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-18 20:59:10,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:59:10,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:59:10,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:59:10,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826484154] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:59:10,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:59:10,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 17 [2021-12-18 20:59:10,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124234681] [2021-12-18 20:59:10,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:59:10,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 20:59:10,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:59:10,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 20:59:10,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-12-18 20:59:10,594 INFO L87 Difference]: Start difference. First operand 25526 states and 33502 transitions. Second operand has 9 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:59:11,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:59:11,456 INFO L93 Difference]: Finished difference Result 45975 states and 60890 transitions. [2021-12-18 20:59:11,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 20:59:11,457 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2021-12-18 20:59:11,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:59:11,522 INFO L225 Difference]: With dead ends: 45975 [2021-12-18 20:59:11,522 INFO L226 Difference]: Without dead ends: 45975 [2021-12-18 20:59:11,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2021-12-18 20:59:11,522 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 1510 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1510 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:59:11,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1510 Valid, 1134 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 20:59:11,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45975 states. [2021-12-18 20:59:11,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45975 to 25525. [2021-12-18 20:59:11,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25525 states, 24375 states have (on average 1.2809846153846154) internal successors, (31224), 24590 states have internal predecessors, (31224), 1085 states have call successors, (1085), 38 states have call predecessors, (1085), 38 states have return successors, (1085), 896 states have call predecessors, (1085), 1085 states have call successors, (1085) [2021-12-18 20:59:11,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25525 states to 25525 states and 33394 transitions. [2021-12-18 20:59:11,952 INFO L78 Accepts]: Start accepts. Automaton has 25525 states and 33394 transitions. Word has length 68 [2021-12-18 20:59:11,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:59:11,953 INFO L470 AbstractCegarLoop]: Abstraction has 25525 states and 33394 transitions. [2021-12-18 20:59:11,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-18 20:59:11,953 INFO L276 IsEmpty]: Start isEmpty. Operand 25525 states and 33394 transitions. [2021-12-18 20:59:11,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-18 20:59:11,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:59:11,954 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:59:11,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-18 20:59:12,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:12,173 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:59:12,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:59:12,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1801951276, now seen corresponding path program 1 times [2021-12-18 20:59:12,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:59:12,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738714994] [2021-12-18 20:59:12,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:12,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:59:12,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:12,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:59:12,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:12,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 20:59:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:12,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:59:12,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:59:12,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738714994] [2021-12-18 20:59:12,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738714994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:59:12,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:59:12,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-18 20:59:12,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613677611] [2021-12-18 20:59:12,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:59:12,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 20:59:12,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:59:12,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 20:59:12,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-18 20:59:12,628 INFO L87 Difference]: Start difference. First operand 25525 states and 33394 transitions. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 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) [2021-12-18 20:59:13,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:59:13,145 INFO L93 Difference]: Finished difference Result 28679 states and 37317 transitions. [2021-12-18 20:59:13,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 20:59:13,146 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 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 69 [2021-12-18 20:59:13,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:59:13,185 INFO L225 Difference]: With dead ends: 28679 [2021-12-18 20:59:13,185 INFO L226 Difference]: Without dead ends: 28679 [2021-12-18 20:59:13,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-12-18 20:59:13,186 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 781 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 1280 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:59:13,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [785 Valid, 1280 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 20:59:13,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28679 states. [2021-12-18 20:59:13,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28679 to 25479. [2021-12-18 20:59:13,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25479 states, 24330 states have (on average 1.278832716810522) internal successors, (31114), 24545 states have internal predecessors, (31114), 1084 states have call successors, (1084), 38 states have call predecessors, (1084), 38 states have return successors, (1084), 895 states have call predecessors, (1084), 1084 states have call successors, (1084) [2021-12-18 20:59:13,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25479 states to 25479 states and 33282 transitions. [2021-12-18 20:59:13,587 INFO L78 Accepts]: Start accepts. Automaton has 25479 states and 33282 transitions. Word has length 69 [2021-12-18 20:59:13,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:59:13,587 INFO L470 AbstractCegarLoop]: Abstraction has 25479 states and 33282 transitions. [2021-12-18 20:59:13,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 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) [2021-12-18 20:59:13,587 INFO L276 IsEmpty]: Start isEmpty. Operand 25479 states and 33282 transitions. [2021-12-18 20:59:13,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-18 20:59:13,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:59:13,588 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:59:13,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-12-18 20:59:13,589 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:59:13,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:59:13,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1439728113, now seen corresponding path program 1 times [2021-12-18 20:59:13,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:59:13,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681718141] [2021-12-18 20:59:13,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:13,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:59:13,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:13,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:59:13,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:13,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 20:59:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:13,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:59:13,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:59:13,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681718141] [2021-12-18 20:59:13,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681718141] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:59:13,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:59:13,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-18 20:59:13,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769607296] [2021-12-18 20:59:13,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:59:13,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-18 20:59:13,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:59:13,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-18 20:59:13,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-12-18 20:59:13,910 INFO L87 Difference]: Start difference. First operand 25479 states and 33282 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 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) [2021-12-18 20:59:15,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:59:15,380 INFO L93 Difference]: Finished difference Result 38237 states and 50328 transitions. [2021-12-18 20:59:15,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-18 20:59:15,380 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 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 75 [2021-12-18 20:59:15,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:59:15,456 INFO L225 Difference]: With dead ends: 38237 [2021-12-18 20:59:15,456 INFO L226 Difference]: Without dead ends: 38237 [2021-12-18 20:59:15,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=416, Invalid=1144, Unknown=0, NotChecked=0, Total=1560 [2021-12-18 20:59:15,462 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 1415 mSDsluCounter, 2676 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1415 SdHoareTripleChecker+Valid, 3049 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 20:59:15,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1415 Valid, 3049 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-18 20:59:15,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38237 states. [2021-12-18 20:59:15,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38237 to 20339. [2021-12-18 20:59:15,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20339 states, 19508 states have (on average 1.2898810744310027) internal successors, (25163), 19683 states have internal predecessors, (25163), 771 states have call successors, (771), 33 states have call predecessors, (771), 33 states have return successors, (771), 622 states have call predecessors, (771), 771 states have call successors, (771) [2021-12-18 20:59:15,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20339 states to 20339 states and 26705 transitions. [2021-12-18 20:59:15,882 INFO L78 Accepts]: Start accepts. Automaton has 20339 states and 26705 transitions. Word has length 75 [2021-12-18 20:59:15,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:59:15,882 INFO L470 AbstractCegarLoop]: Abstraction has 20339 states and 26705 transitions. [2021-12-18 20:59:15,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 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) [2021-12-18 20:59:15,883 INFO L276 IsEmpty]: Start isEmpty. Operand 20339 states and 26705 transitions. [2021-12-18 20:59:15,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-18 20:59:15,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:59:15,885 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:59:15,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-12-18 20:59:15,885 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 63 more)] === [2021-12-18 20:59:15,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:59:15,886 INFO L85 PathProgramCache]: Analyzing trace with hash 713460507, now seen corresponding path program 1 times [2021-12-18 20:59:15,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:59:15,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458874383] [2021-12-18 20:59:15,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:15,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:59:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:15,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-18 20:59:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:15,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-18 20:59:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 20:59:15,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:59:15,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458874383] [2021-12-18 20:59:15,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458874383] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:59:15,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165159053] [2021-12-18 20:59:15,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:59:15,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:59:15,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:59:16,028 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:59:16,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-18 20:59:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:59:16,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-18 20:59:16,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:59:16,849 INFO L388 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 [2021-12-18 20:59:16,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:59:16,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:59:16,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 41 [2021-12-18 20:59:17,064 INFO L388 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 28 treesize of output 17 [2021-12-18 20:59:17,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:59:17,241 INFO L388 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 45 treesize of output 19 [2021-12-18 20:59:17,416 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 20:59:17,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:59:17,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:59:17,631 INFO L388 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 353 treesize of output 355 [2021-12-18 20:59:17,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:59:17,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 4 [2021-12-18 20:59:17,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:59:17,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:59:17,661 INFO L388 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 187 treesize of output 185 Killed by 15