./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext-properties/test-0232_1-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 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-0232_1-2.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 f7b1141c3157e34a4974729c197a93a4b99ad75fc020122df5d99d43bcc85e27 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 00:06:30,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 00:06:30,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 00:06:30,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 00:06:30,996 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 00:06:30,999 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 00:06:31,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 00:06:31,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 00:06:31,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 00:06:31,011 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 00:06:31,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 00:06:31,012 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 00:06:31,013 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 00:06:31,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 00:06:31,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 00:06:31,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 00:06:31,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 00:06:31,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 00:06:31,022 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 00:06:31,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 00:06:31,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 00:06:31,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 00:06:31,028 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 00:06:31,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 00:06:31,032 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 00:06:31,032 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 00:06:31,032 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 00:06:31,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 00:06:31,033 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 00:06:31,034 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 00:06:31,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 00:06:31,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 00:06:31,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 00:06:31,037 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 00:06:31,038 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 00:06:31,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 00:06:31,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 00:06:31,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 00:06:31,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 00:06:31,039 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 00:06:31,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 00:06:31,040 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 00:06:31,072 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 00:06:31,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 00:06:31,072 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 00:06:31,073 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 00:06:31,073 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 00:06:31,073 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 00:06:31,074 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 00:06:31,074 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 00:06:31,074 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 00:06:31,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 00:06:31,075 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 00:06:31,075 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 00:06:31,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 00:06:31,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 00:06:31,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 00:06:31,076 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 00:06:31,076 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 00:06:31,076 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 00:06:31,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 00:06:31,076 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 00:06:31,076 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 00:06:31,077 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 00:06:31,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 00:06:31,077 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 00:06:31,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 00:06:31,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 00:06:31,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 00:06:31,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 00:06:31,078 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 00:06:31,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 00:06:31,078 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 00:06:31,078 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7b1141c3157e34a4974729c197a93a4b99ad75fc020122df5d99d43bcc85e27 [2021-12-22 00:06:31,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 00:06:31,321 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 00:06:31,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 00:06:31,324 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 00:06:31,324 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 00:06:31,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/test-0232_1-2.i [2021-12-22 00:06:31,383 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/213f086ea/27a6253b7fe64d209b5dd17ccfab024c/FLAGef97b7b02 [2021-12-22 00:06:31,867 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 00:06:31,869 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/test-0232_1-2.i [2021-12-22 00:06:31,905 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/213f086ea/27a6253b7fe64d209b5dd17ccfab024c/FLAGef97b7b02 [2021-12-22 00:06:32,415 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/213f086ea/27a6253b7fe64d209b5dd17ccfab024c [2021-12-22 00:06:32,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 00:06:32,419 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 00:06:32,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 00:06:32,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 00:06:32,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 00:06:32,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:06:32" (1/1) ... [2021-12-22 00:06:32,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b851b96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:06:32, skipping insertion in model container [2021-12-22 00:06:32,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:06:32" (1/1) ... [2021-12-22 00:06:32,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 00:06:32,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 00:06:32,655 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:06:32,664 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 00:06:32,715 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 00:06:32,740 INFO L208 MainTranslator]: Completed translation [2021-12-22 00:06:32,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:06:32 WrapperNode [2021-12-22 00:06:32,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 00:06:32,742 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 00:06:32,742 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 00:06:32,743 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 00:06:32,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:06:32" (1/1) ... [2021-12-22 00:06:32,778 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:06:32" (1/1) ... [2021-12-22 00:06:32,799 INFO L137 Inliner]: procedures = 126, calls = 33, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 97 [2021-12-22 00:06:32,799 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 00:06:32,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 00:06:32,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 00:06:32,800 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 00:06:32,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:06:32" (1/1) ... [2021-12-22 00:06:32,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:06:32" (1/1) ... [2021-12-22 00:06:32,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:06:32" (1/1) ... [2021-12-22 00:06:32,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:06:32" (1/1) ... [2021-12-22 00:06:32,827 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:06:32" (1/1) ... [2021-12-22 00:06:32,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:06:32" (1/1) ... [2021-12-22 00:06:32,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:06:32" (1/1) ... [2021-12-22 00:06:32,835 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 00:06:32,844 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 00:06:32,844 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 00:06:32,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 00:06:32,845 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:06:32" (1/1) ... [2021-12-22 00:06:32,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 00:06:32,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:06:32,878 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) [2021-12-22 00:06:32,884 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 [2021-12-22 00:06:32,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 00:06:32,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 00:06:32,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 00:06:32,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 00:06:32,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 00:06:32,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 00:06:32,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 00:06:32,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 00:06:32,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 00:06:32,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 00:06:33,000 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 00:06:33,001 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 00:06:33,198 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 00:06:33,203 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 00:06:33,203 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 00:06:33,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:06:33 BoogieIcfgContainer [2021-12-22 00:06:33,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 00:06:33,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 00:06:33,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 00:06:33,209 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 00:06:33,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:06:32" (1/3) ... [2021-12-22 00:06:33,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@917fa82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:06:33, skipping insertion in model container [2021-12-22 00:06:33,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:06:32" (2/3) ... [2021-12-22 00:06:33,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@917fa82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:06:33, skipping insertion in model container [2021-12-22 00:06:33,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:06:33" (3/3) ... [2021-12-22 00:06:33,211 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0232_1-2.i [2021-12-22 00:06:33,214 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 00:06:33,215 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2021-12-22 00:06:33,243 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 00:06:33,248 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 [2021-12-22 00:06:33,248 INFO L340 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2021-12-22 00:06:33,259 INFO L276 IsEmpty]: Start isEmpty. Operand has 90 states, 45 states have (on average 2.111111111111111) internal successors, (95), 89 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:33,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-22 00:06:33,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:06:33,264 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-22 00:06:33,264 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-12-22 00:06:33,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:06:33,268 INFO L85 PathProgramCache]: Analyzing trace with hash 925637, now seen corresponding path program 1 times [2021-12-22 00:06:33,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:06:33,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258132303] [2021-12-22 00:06:33,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:06:33,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:06:33,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:33,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:06:33,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:06:33,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258132303] [2021-12-22 00:06:33,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258132303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:06:33,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:06:33,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:06:33,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627437640] [2021-12-22 00:06:33,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:06:33,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:06:33,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:06:33,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:06:33,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:06:33,471 INFO L87 Difference]: Start difference. First operand has 90 states, 45 states have (on average 2.111111111111111) internal successors, (95), 89 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:33,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:06:33,625 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2021-12-22 00:06:33,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:06:33,627 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-12-22 00:06:33,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:06:33,633 INFO L225 Difference]: With dead ends: 101 [2021-12-22 00:06:33,634 INFO L226 Difference]: Without dead ends: 99 [2021-12-22 00:06:33,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:06:33,640 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 142 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:06:33,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 69 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:06:33,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-22 00:06:33,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 82. [2021-12-22 00:06:33,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 81 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:33,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2021-12-22 00:06:33,674 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 4 [2021-12-22 00:06:33,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:06:33,674 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2021-12-22 00:06:33,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:33,674 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2021-12-22 00:06:33,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-22 00:06:33,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:06:33,676 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-22 00:06:33,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 00:06:33,676 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-12-22 00:06:33,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:06:33,679 INFO L85 PathProgramCache]: Analyzing trace with hash 925638, now seen corresponding path program 1 times [2021-12-22 00:06:33,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:06:33,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039761145] [2021-12-22 00:06:33,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:06:33,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:06:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:33,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:06:33,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:06:33,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039761145] [2021-12-22 00:06:33,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039761145] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:06:33,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:06:33,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 00:06:33,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469082563] [2021-12-22 00:06:33,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:06:33,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:06:33,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:06:33,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:06:33,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:06:33,746 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:33,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:06:33,828 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2021-12-22 00:06:33,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 00:06:33,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-12-22 00:06:33,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:06:33,832 INFO L225 Difference]: With dead ends: 93 [2021-12-22 00:06:33,832 INFO L226 Difference]: Without dead ends: 93 [2021-12-22 00:06:33,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:06:33,837 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 143 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:06:33,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 49 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:06:33,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-22 00:06:33,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2021-12-22 00:06:33,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 49 states have (on average 1.816326530612245) internal successors, (89), 82 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:33,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2021-12-22 00:06:33,853 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 4 [2021-12-22 00:06:33,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:06:33,853 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2021-12-22 00:06:33,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:33,854 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2021-12-22 00:06:33,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-22 00:06:33,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:06:33,856 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-22 00:06:33,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 00:06:33,857 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-12-22 00:06:33,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:06:33,858 INFO L85 PathProgramCache]: Analyzing trace with hash 28694727, now seen corresponding path program 1 times [2021-12-22 00:06:33,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:06:33,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027830324] [2021-12-22 00:06:33,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:06:33,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:06:33,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:06:33,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:06:33,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027830324] [2021-12-22 00:06:33,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027830324] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:06:33,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:06:33,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:06:33,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725364903] [2021-12-22 00:06:33,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:06:33,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:06:33,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:06:33,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:06:33,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:06:33,903 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:33,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:06:33,953 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2021-12-22 00:06:33,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:06:33,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-12-22 00:06:33,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:06:33,956 INFO L225 Difference]: With dead ends: 89 [2021-12-22 00:06:33,956 INFO L226 Difference]: Without dead ends: 89 [2021-12-22 00:06:33,956 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 [2021-12-22 00:06:33,959 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 49 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:06:33,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 68 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:06:33,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-22 00:06:33,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2021-12-22 00:06:33,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 78 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:33,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2021-12-22 00:06:33,967 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 5 [2021-12-22 00:06:33,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:06:33,967 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2021-12-22 00:06:33,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:33,967 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2021-12-22 00:06:33,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-22 00:06:33,968 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:06:33,968 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-22 00:06:33,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 00:06:33,968 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-12-22 00:06:33,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:06:33,976 INFO L85 PathProgramCache]: Analyzing trace with hash 28694728, now seen corresponding path program 1 times [2021-12-22 00:06:33,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:06:33,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613960136] [2021-12-22 00:06:33,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:06:33,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:06:33,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:34,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:06:34,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:06:34,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613960136] [2021-12-22 00:06:34,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613960136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:06:34,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:06:34,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 00:06:34,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264671624] [2021-12-22 00:06:34,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:06:34,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 00:06:34,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:06:34,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 00:06:34,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 00:06:34,055 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:34,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:06:34,086 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2021-12-22 00:06:34,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 00:06:34,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-12-22 00:06:34,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:06:34,087 INFO L225 Difference]: With dead ends: 76 [2021-12-22 00:06:34,087 INFO L226 Difference]: Without dead ends: 76 [2021-12-22 00:06:34,087 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 [2021-12-22 00:06:34,088 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 68 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:06:34,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 46 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:06:34,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-22 00:06:34,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-12-22 00:06:34,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 49 states have (on average 1.653061224489796) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:34,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2021-12-22 00:06:34,097 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 5 [2021-12-22 00:06:34,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:06:34,097 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2021-12-22 00:06:34,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:34,097 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2021-12-22 00:06:34,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 00:06:34,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:06:34,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:06:34,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 00:06:34,098 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-12-22 00:06:34,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:06:34,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1328641136, now seen corresponding path program 1 times [2021-12-22 00:06:34,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:06:34,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860283608] [2021-12-22 00:06:34,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:06:34,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:06:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:34,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:06:34,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:06:34,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860283608] [2021-12-22 00:06:34,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860283608] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:06:34,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:06:34,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 00:06:34,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424262605] [2021-12-22 00:06:34,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:06:34,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 00:06:34,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:06:34,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 00:06:34,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:06:34,200 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:34,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:06:34,326 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2021-12-22 00:06:34,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 00:06:34,326 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-22 00:06:34,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:06:34,327 INFO L225 Difference]: With dead ends: 86 [2021-12-22 00:06:34,327 INFO L226 Difference]: Without dead ends: 86 [2021-12-22 00:06:34,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-22 00:06:34,328 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 14 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:06:34,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 349 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:06:34,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-22 00:06:34,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2021-12-22 00:06:34,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 55 states have (on average 1.5818181818181818) internal successors, (87), 80 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:34,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2021-12-22 00:06:34,331 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 10 [2021-12-22 00:06:34,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:06:34,332 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2021-12-22 00:06:34,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:34,332 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2021-12-22 00:06:34,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 00:06:34,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:06:34,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:06:34,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 00:06:34,333 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-12-22 00:06:34,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:06:34,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1868053176, now seen corresponding path program 1 times [2021-12-22 00:06:34,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:06:34,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990719546] [2021-12-22 00:06:34,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:06:34,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:06:34,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:34,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:06:34,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:06:34,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990719546] [2021-12-22 00:06:34,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990719546] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:06:34,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:06:34,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:06:34,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033644228] [2021-12-22 00:06:34,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:06:34,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:06:34,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:06:34,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:06:34,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:06:34,406 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:34,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:06:34,501 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2021-12-22 00:06:34,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:06:34,502 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-12-22 00:06:34,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:06:34,502 INFO L225 Difference]: With dead ends: 89 [2021-12-22 00:06:34,502 INFO L226 Difference]: Without dead ends: 89 [2021-12-22 00:06:34,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:06:34,503 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 109 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:06:34,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 102 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:06:34,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-22 00:06:34,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2021-12-22 00:06:34,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 55 states have (on average 1.5636363636363637) internal successors, (86), 79 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:34,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2021-12-22 00:06:34,507 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 17 [2021-12-22 00:06:34,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:06:34,507 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2021-12-22 00:06:34,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:34,507 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2021-12-22 00:06:34,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 00:06:34,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:06:34,508 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:06:34,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 00:06:34,508 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-12-22 00:06:34,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:06:34,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1868053177, now seen corresponding path program 1 times [2021-12-22 00:06:34,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:06:34,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388804022] [2021-12-22 00:06:34,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:06:34,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:06:34,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:34,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:06:34,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:06:34,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388804022] [2021-12-22 00:06:34,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388804022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:06:34,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:06:34,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 00:06:34,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095164713] [2021-12-22 00:06:34,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:06:34,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 00:06:34,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:06:34,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 00:06:34,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 00:06:34,586 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:34,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:06:34,683 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2021-12-22 00:06:34,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 00:06:34,684 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-12-22 00:06:34,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:06:34,684 INFO L225 Difference]: With dead ends: 91 [2021-12-22 00:06:34,684 INFO L226 Difference]: Without dead ends: 91 [2021-12-22 00:06:34,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:06:34,685 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 124 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:06:34,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 99 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:06:34,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-22 00:06:34,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2021-12-22 00:06:34,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 55 states have (on average 1.5454545454545454) internal successors, (85), 78 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:34,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2021-12-22 00:06:34,689 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 17 [2021-12-22 00:06:34,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:06:34,689 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2021-12-22 00:06:34,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:34,689 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2021-12-22 00:06:34,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-22 00:06:34,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:06:34,690 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:06:34,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 00:06:34,690 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-12-22 00:06:34,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:06:34,691 INFO L85 PathProgramCache]: Analyzing trace with hash 2076126984, now seen corresponding path program 1 times [2021-12-22 00:06:34,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:06:34,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250261544] [2021-12-22 00:06:34,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:06:34,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:06:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:06:34,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:06:34,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250261544] [2021-12-22 00:06:34,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250261544] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:06:34,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:06:34,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 00:06:34,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055008257] [2021-12-22 00:06:34,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:06:34,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 00:06:34,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:06:34,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 00:06:34,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:06:34,724 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:34,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:06:34,733 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2021-12-22 00:06:34,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 00:06:34,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-12-22 00:06:34,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:06:34,734 INFO L225 Difference]: With dead ends: 78 [2021-12-22 00:06:34,735 INFO L226 Difference]: Without dead ends: 78 [2021-12-22 00:06:34,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 00:06:34,735 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 59 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:06:34,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 150 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:06:34,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-22 00:06:34,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2021-12-22 00:06:34,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.52) internal successors, (76), 73 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:34,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2021-12-22 00:06:34,738 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 18 [2021-12-22 00:06:34,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:06:34,738 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2021-12-22 00:06:34,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:34,739 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2021-12-22 00:06:34,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 00:06:34,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:06:34,739 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] [2021-12-22 00:06:34,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 00:06:34,740 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-12-22 00:06:34,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:06:34,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1280939784, now seen corresponding path program 1 times [2021-12-22 00:06:34,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:06:34,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11480807] [2021-12-22 00:06:34,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:06:34,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:06:34,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:06:34,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:06:34,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11480807] [2021-12-22 00:06:34,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11480807] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:06:34,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:06:34,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 00:06:34,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147446181] [2021-12-22 00:06:34,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:06:34,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 00:06:34,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:06:34,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 00:06:34,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-22 00:06:34,836 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:34,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:06:34,949 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2021-12-22 00:06:34,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:06:34,949 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-12-22 00:06:34,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:06:34,950 INFO L225 Difference]: With dead ends: 73 [2021-12-22 00:06:34,950 INFO L226 Difference]: Without dead ends: 73 [2021-12-22 00:06:34,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-22 00:06:34,951 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 154 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 00:06:34,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 142 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 00:06:34,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-22 00:06:34,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-12-22 00:06:34,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 50 states have (on average 1.5) internal successors, (75), 72 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:34,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2021-12-22 00:06:34,953 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 20 [2021-12-22 00:06:34,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:06:34,953 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2021-12-22 00:06:34,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:34,954 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2021-12-22 00:06:34,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 00:06:34,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:06:34,954 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] [2021-12-22 00:06:34,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 00:06:34,954 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-12-22 00:06:34,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:06:34,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1280939783, now seen corresponding path program 1 times [2021-12-22 00:06:34,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:06:34,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819583400] [2021-12-22 00:06:34,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:06:34,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:06:34,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:35,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:06:35,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:06:35,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819583400] [2021-12-22 00:06:35,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819583400] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:06:35,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:06:35,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 00:06:35,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492616677] [2021-12-22 00:06:35,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:06:35,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 00:06:35,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:06:35,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 00:06:35,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 00:06:35,002 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:35,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:06:35,060 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2021-12-22 00:06:35,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 00:06:35,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-12-22 00:06:35,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:06:35,061 INFO L225 Difference]: With dead ends: 72 [2021-12-22 00:06:35,061 INFO L226 Difference]: Without dead ends: 72 [2021-12-22 00:06:35,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 00:06:35,062 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 14 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 00:06:35,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 154 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 00:06:35,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-22 00:06:35,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-12-22 00:06:35,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 50 states have (on average 1.48) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:35,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-12-22 00:06:35,064 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 20 [2021-12-22 00:06:35,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:06:35,065 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-12-22 00:06:35,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:35,065 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-12-22 00:06:35,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-22 00:06:35,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:06:35,065 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] [2021-12-22 00:06:35,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 00:06:35,066 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-12-22 00:06:35,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:06:35,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1054427643, now seen corresponding path program 1 times [2021-12-22 00:06:35,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:06:35,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329327532] [2021-12-22 00:06:35,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:06:35,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:06:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:06:35,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:06:35,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329327532] [2021-12-22 00:06:35,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329327532] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:06:35,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:06:35,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 00:06:35,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170940442] [2021-12-22 00:06:35,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:06:35,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 00:06:35,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:06:35,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 00:06:35,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-22 00:06:35,191 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:35,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:06:35,527 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2021-12-22 00:06:35,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 00:06:35,527 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-12-22 00:06:35,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:06:35,528 INFO L225 Difference]: With dead ends: 137 [2021-12-22 00:06:35,528 INFO L226 Difference]: Without dead ends: 137 [2021-12-22 00:06:35,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-12-22 00:06:35,529 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 241 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:06:35,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 220 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:06:35,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-22 00:06:35,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2021-12-22 00:06:35,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 84 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:35,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2021-12-22 00:06:35,531 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 21 [2021-12-22 00:06:35,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:06:35,531 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2021-12-22 00:06:35,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:35,533 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2021-12-22 00:06:35,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 00:06:35,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:06:35,534 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] [2021-12-22 00:06:35,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 00:06:35,534 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-12-22 00:06:35,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:06:35,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1672481337, now seen corresponding path program 1 times [2021-12-22 00:06:35,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:06:35,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765192736] [2021-12-22 00:06:35,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:06:35,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:06:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:35,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:06:35,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:06:35,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765192736] [2021-12-22 00:06:35,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765192736] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 00:06:35,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 00:06:35,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 00:06:35,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806048350] [2021-12-22 00:06:35,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 00:06:35,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 00:06:35,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 00:06:35,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 00:06:35,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-22 00:06:35,663 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:36,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 00:06:36,025 INFO L93 Difference]: Finished difference Result 136 states and 141 transitions. [2021-12-22 00:06:36,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 00:06:36,026 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-12-22 00:06:36,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 00:06:36,026 INFO L225 Difference]: With dead ends: 136 [2021-12-22 00:06:36,026 INFO L226 Difference]: Without dead ends: 136 [2021-12-22 00:06:36,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-12-22 00:06:36,027 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 275 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 00:06:36,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 179 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 00:06:36,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-22 00:06:36,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 86. [2021-12-22 00:06:36,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.390625) internal successors, (89), 85 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:36,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2021-12-22 00:06:36,029 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 22 [2021-12-22 00:06:36,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 00:06:36,029 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2021-12-22 00:06:36,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 00:06:36,030 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2021-12-22 00:06:36,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 00:06:36,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 00:06:36,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 00:06:36,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 00:06:36,030 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-12-22 00:06:36,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 00:06:36,030 INFO L85 PathProgramCache]: Analyzing trace with hash -428723026, now seen corresponding path program 1 times [2021-12-22 00:06:36,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 00:06:36,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231465693] [2021-12-22 00:06:36,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:06:36,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 00:06:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:36,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:06:36,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 00:06:36,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231465693] [2021-12-22 00:06:36,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231465693] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 00:06:36,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099731327] [2021-12-22 00:06:36,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 00:06:36,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 00:06:36,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 00:06:36,130 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) [2021-12-22 00:06:36,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 00:06:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 00:06:36,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-22 00:06:36,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 00:06:36,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 00:06:36,406 INFO L353 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-12-22 00:06:36,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-12-22 00:06:36,459 INFO L353 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-22 00:06:36,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-12-22 00:06:36,510 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-22 00:06:36,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-12-22 00:06:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 00:06:36,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 00:06:36,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34