./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 25419aae3fa6b25817a0bb63109cdb8dd339b767b8ddb876acb37423139730d4 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 20:04:33,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 20:04:33,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 20:04:33,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 20:04:33,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 20:04:33,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 20:04:33,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 20:04:33,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 20:04:33,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 20:04:33,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 20:04:33,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 20:04:33,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 20:04:33,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 20:04:33,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 20:04:33,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 20:04:33,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 20:04:33,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 20:04:33,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 20:04:33,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 20:04:33,413 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 20:04:33,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 20:04:33,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 20:04:33,416 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 20:04:33,417 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 20:04:33,418 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 20:04:33,419 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 20:04:33,419 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 20:04:33,420 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 20:04:33,420 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 20:04:33,421 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 20:04:33,421 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 20:04:33,422 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 20:04:33,422 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 20:04:33,424 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 20:04:33,425 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 20:04:33,426 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 20:04:33,426 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 20:04:33,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 20:04:33,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 20:04:33,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 20:04:33,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 20:04:33,442 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 20:04:33,476 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 20:04:33,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 20:04:33,477 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 20:04:33,477 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 20:04:33,477 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 20:04:33,478 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 20:04:33,478 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 20:04:33,478 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 20:04:33,478 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 20:04:33,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 20:04:33,479 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 20:04:33,479 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 20:04:33,479 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 20:04:33,479 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 20:04:33,479 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 20:04:33,479 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 20:04:33,479 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 20:04:33,480 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 20:04:33,480 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 20:04:33,480 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 20:04:33,480 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 20:04:33,480 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 20:04:33,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 20:04:33,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 20:04:33,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 20:04:33,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 20:04:33,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 20:04:33,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 20:04:33,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 20:04:33,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 20:04:33,481 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 20:04:33,482 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25419aae3fa6b25817a0bb63109cdb8dd339b767b8ddb876acb37423139730d4 [2021-12-18 20:04:33,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 20:04:33,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 20:04:33,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 20:04:33,697 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 20:04:33,698 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 20:04:33,699 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i [2021-12-18 20:04:33,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f8fd9d32/65475cba1f7b4b64a34d27cd58480d7f/FLAGc6dcaad23 [2021-12-18 20:04:34,076 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 20:04:34,077 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i [2021-12-18 20:04:34,086 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f8fd9d32/65475cba1f7b4b64a34d27cd58480d7f/FLAGc6dcaad23 [2021-12-18 20:04:34,496 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f8fd9d32/65475cba1f7b4b64a34d27cd58480d7f [2021-12-18 20:04:34,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 20:04:34,499 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 20:04:34,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 20:04:34,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 20:04:34,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 20:04:34,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:04:34" (1/1) ... [2021-12-18 20:04:34,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e953186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:04:34, skipping insertion in model container [2021-12-18 20:04:34,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:04:34" (1/1) ... [2021-12-18 20:04:34,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 20:04:34,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 20:04:34,655 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i[819,832] [2021-12-18 20:04:34,668 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 20:04:34,673 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 20:04:34,683 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i[819,832] [2021-12-18 20:04:34,687 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 20:04:34,695 INFO L208 MainTranslator]: Completed translation [2021-12-18 20:04:34,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:04:34 WrapperNode [2021-12-18 20:04:34,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 20:04:34,697 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 20:04:34,697 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 20:04:34,697 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 20:04:34,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:04:34" (1/1) ... [2021-12-18 20:04:34,720 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:04:34" (1/1) ... [2021-12-18 20:04:34,734 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-12-18 20:04:34,734 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 20:04:34,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 20:04:34,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 20:04:34,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 20:04:34,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:04:34" (1/1) ... [2021-12-18 20:04:34,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:04:34" (1/1) ... [2021-12-18 20:04:34,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:04:34" (1/1) ... [2021-12-18 20:04:34,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:04:34" (1/1) ... [2021-12-18 20:04:34,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:04:34" (1/1) ... [2021-12-18 20:04:34,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:04:34" (1/1) ... [2021-12-18 20:04:34,756 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:04:34" (1/1) ... [2021-12-18 20:04:34,757 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 20:04:34,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 20:04:34,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 20:04:34,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 20:04:34,760 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:04:34" (1/1) ... [2021-12-18 20:04:34,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 20:04:34,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:34,781 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-18 20:04:34,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-18 20:04:34,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 20:04:34,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-18 20:04:34,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 20:04:34,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 20:04:34,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 20:04:34,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 20:04:34,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 20:04:34,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 20:04:34,865 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 20:04:34,866 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 20:04:34,968 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 20:04:34,972 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 20:04:34,972 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-18 20:04:34,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:04:34 BoogieIcfgContainer [2021-12-18 20:04:34,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 20:04:34,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 20:04:34,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 20:04:34,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 20:04:34,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 08:04:34" (1/3) ... [2021-12-18 20:04:34,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32ff217a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 08:04:34, skipping insertion in model container [2021-12-18 20:04:34,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:04:34" (2/3) ... [2021-12-18 20:04:34,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32ff217a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 08:04:34, skipping insertion in model container [2021-12-18 20:04:34,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:04:34" (3/3) ... [2021-12-18 20:04:34,978 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-1.i [2021-12-18 20:04:34,982 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 20:04:34,982 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-12-18 20:04:35,008 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 20:04:35,012 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 20:04:35,012 INFO L340 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2021-12-18 20:04:35,021 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:35,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-18 20:04:35,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:35,025 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-18 20:04:35,025 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 20:04:35,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:35,029 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2021-12-18 20:04:35,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:35,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951086057] [2021-12-18 20:04:35,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:35,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:35,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:35,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:35,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951086057] [2021-12-18 20:04:35,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951086057] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:35,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:04:35,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 20:04:35,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581716393] [2021-12-18 20:04:35,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:35,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 20:04:35,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:35,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 20:04:35,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:04:35,166 INFO L87 Difference]: Start difference. First operand has 41 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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) [2021-12-18 20:04:35,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:35,203 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-12-18 20:04:35,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 20:04:35,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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 [2021-12-18 20:04:35,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:35,209 INFO L225 Difference]: With dead ends: 36 [2021-12-18 20:04:35,209 INFO L226 Difference]: Without dead ends: 34 [2021-12-18 20:04:35,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:04:35,213 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 31 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:35,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 24 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:04:35,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-18 20:04:35,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-18 20:04:35,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.565217391304348) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:35,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-12-18 20:04:35,240 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 4 [2021-12-18 20:04:35,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:35,241 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-12-18 20:04:35,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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) [2021-12-18 20:04:35,241 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-12-18 20:04:35,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-18 20:04:35,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:35,242 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-18 20:04:35,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 20:04:35,242 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 20:04:35,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:35,243 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2021-12-18 20:04:35,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:35,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667184243] [2021-12-18 20:04:35,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:35,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:35,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:35,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667184243] [2021-12-18 20:04:35,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667184243] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:35,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:04:35,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 20:04:35,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86386592] [2021-12-18 20:04:35,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:35,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 20:04:35,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:35,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 20:04:35,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:04:35,291 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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) [2021-12-18 20:04:35,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:35,324 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-12-18 20:04:35,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 20:04:35,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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 [2021-12-18 20:04:35,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:35,325 INFO L225 Difference]: With dead ends: 38 [2021-12-18 20:04:35,325 INFO L226 Difference]: Without dead ends: 38 [2021-12-18 20:04:35,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:04:35,327 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:35,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 45 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:04:35,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-18 20:04:35,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-12-18 20:04:35,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.52) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:35,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-12-18 20:04:35,331 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 4 [2021-12-18 20:04:35,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:35,331 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-12-18 20:04:35,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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) [2021-12-18 20:04:35,332 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-12-18 20:04:35,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 20:04:35,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:35,332 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:35,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 20:04:35,333 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 20:04:35,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:35,333 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2021-12-18 20:04:35,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:35,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452854038] [2021-12-18 20:04:35,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:35,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:35,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:35,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:35,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452854038] [2021-12-18 20:04:35,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452854038] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:35,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91715571] [2021-12-18 20:04:35,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:35,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:35,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:35,396 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:35,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 20:04:35,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:35,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-18 20:04:35,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:35,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:04:35,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:04:35,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 20:04:35,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:35,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:35,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91715571] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:35,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:35,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2021-12-18 20:04:35,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010499906] [2021-12-18 20:04:35,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:35,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 20:04:35,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:35,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 20:04:35,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-18 20:04:35,637 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 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) [2021-12-18 20:04:35,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:35,725 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-12-18 20:04:35,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 20:04:35,725 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 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 8 [2021-12-18 20:04:35,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:35,730 INFO L225 Difference]: With dead ends: 48 [2021-12-18 20:04:35,730 INFO L226 Difference]: Without dead ends: 48 [2021-12-18 20:04:35,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-12-18 20:04:35,734 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:35,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:04:35,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-18 20:04:35,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-12-18 20:04:35,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:35,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-12-18 20:04:35,743 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 8 [2021-12-18 20:04:35,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:35,743 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-12-18 20:04:35,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 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) [2021-12-18 20:04:35,743 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-12-18 20:04:35,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 20:04:35,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:35,744 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-12-18 20:04:35,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-18 20:04:35,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:35,964 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 20:04:35,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:35,966 INFO L85 PathProgramCache]: Analyzing trace with hash -4646106, now seen corresponding path program 1 times [2021-12-18 20:04:35,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:35,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429083498] [2021-12-18 20:04:35,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:35,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:36,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:36,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:36,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429083498] [2021-12-18 20:04:36,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429083498] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:36,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229560460] [2021-12-18 20:04:36,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:36,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:36,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:36,044 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:36,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 20:04:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:36,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 20:04:36,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:36,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:36,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229560460] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:36,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:36,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2021-12-18 20:04:36,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940637288] [2021-12-18 20:04:36,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:36,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 20:04:36,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:36,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 20:04:36,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2021-12-18 20:04:36,198 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:36,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:36,418 INFO L93 Difference]: Finished difference Result 196 states and 204 transitions. [2021-12-18 20:04:36,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 20:04:36,419 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 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 13 [2021-12-18 20:04:36,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:36,424 INFO L225 Difference]: With dead ends: 196 [2021-12-18 20:04:36,424 INFO L226 Difference]: Without dead ends: 196 [2021-12-18 20:04:36,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-12-18 20:04:36,428 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 418 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:36,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 92 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:04:36,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-18 20:04:36,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 55. [2021-12-18 20:04:36,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:36,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-12-18 20:04:36,434 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 13 [2021-12-18 20:04:36,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:36,434 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-12-18 20:04:36,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:36,434 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-12-18 20:04:36,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-18 20:04:36,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:36,435 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2021-12-18 20:04:36,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-18 20:04:36,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-18 20:04:36,651 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 20:04:36,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:36,651 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2021-12-18 20:04:36,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:36,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986658298] [2021-12-18 20:04:36,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:36,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:36,783 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:36,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:36,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986658298] [2021-12-18 20:04:36,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986658298] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:36,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882467376] [2021-12-18 20:04:36,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:04:36,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:36,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:36,823 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:36,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 20:04:36,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:04:36,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:36,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-18 20:04:36,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:36,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:04:36,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:04:36,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 20:04:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:37,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:37,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882467376] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:37,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:37,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2021-12-18 20:04:37,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627418298] [2021-12-18 20:04:37,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:37,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-18 20:04:37,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:37,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-18 20:04:37,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-12-18 20:04:37,270 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:37,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:37,497 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2021-12-18 20:04:37,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 20:04:37,497 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 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 [2021-12-18 20:04:37,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:37,498 INFO L225 Difference]: With dead ends: 76 [2021-12-18 20:04:37,498 INFO L226 Difference]: Without dead ends: 76 [2021-12-18 20:04:37,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2021-12-18 20:04:37,498 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 48 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:37,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 124 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:04:37,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-18 20:04:37,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2021-12-18 20:04:37,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 71 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:37,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2021-12-18 20:04:37,502 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 20 [2021-12-18 20:04:37,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:37,503 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2021-12-18 20:04:37,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:37,503 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2021-12-18 20:04:37,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-18 20:04:37,504 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:37,504 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:37,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:37,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:37,711 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 20:04:37,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:37,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1934674516, now seen corresponding path program 1 times [2021-12-18 20:04:37,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:37,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347505228] [2021-12-18 20:04:37,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:37,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:37,759 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 20:04:37,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:37,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347505228] [2021-12-18 20:04:37,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347505228] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:37,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:04:37,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 20:04:37,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502306741] [2021-12-18 20:04:37,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:37,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 20:04:37,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:37,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 20:04:37,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:04:37,761 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:37,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:37,776 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2021-12-18 20:04:37,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 20:04:37,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-18 20:04:37,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:37,777 INFO L225 Difference]: With dead ends: 70 [2021-12-18 20:04:37,777 INFO L226 Difference]: Without dead ends: 70 [2021-12-18 20:04:37,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:04:37,778 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:37,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 22 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:04:37,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-18 20:04:37,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-12-18 20:04:37,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 69 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) [2021-12-18 20:04:37,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-12-18 20:04:37,782 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 32 [2021-12-18 20:04:37,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:37,783 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-12-18 20:04:37,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:37,784 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-12-18 20:04:37,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-18 20:04:37,784 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:37,784 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:37,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-18 20:04:37,785 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 20:04:37,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:37,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1934674515, now seen corresponding path program 1 times [2021-12-18 20:04:37,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:37,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708535274] [2021-12-18 20:04:37,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:37,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 20:04:37,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:37,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708535274] [2021-12-18 20:04:37,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708535274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:37,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:04:37,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:04:37,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935510929] [2021-12-18 20:04:37,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:37,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:04:37,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:37,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:04:37,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:04:37,836 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:37,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:37,865 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2021-12-18 20:04:37,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:04:37,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-18 20:04:37,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:37,866 INFO L225 Difference]: With dead ends: 84 [2021-12-18 20:04:37,866 INFO L226 Difference]: Without dead ends: 84 [2021-12-18 20:04:37,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:04:37,867 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 52 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:37,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 25 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:04:37,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-18 20:04:37,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2021-12-18 20:04:37,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 74 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:37,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2021-12-18 20:04:37,871 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 32 [2021-12-18 20:04:37,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:37,871 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2021-12-18 20:04:37,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:37,872 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2021-12-18 20:04:37,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-18 20:04:37,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:37,872 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:37,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-18 20:04:37,873 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 20:04:37,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:37,873 INFO L85 PathProgramCache]: Analyzing trace with hash 498629567, now seen corresponding path program 1 times [2021-12-18 20:04:37,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:37,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558084482] [2021-12-18 20:04:37,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:37,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:37,946 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:37,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:37,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558084482] [2021-12-18 20:04:37,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558084482] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:37,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569705734] [2021-12-18 20:04:37,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:37,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:37,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:37,971 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:37,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 20:04:38,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:38,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 20:04:38,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:38,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:38,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569705734] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:38,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:38,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-12-18 20:04:38,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626332817] [2021-12-18 20:04:38,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:38,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-18 20:04:38,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:38,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-18 20:04:38,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-12-18 20:04:38,233 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:38,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:38,554 INFO L93 Difference]: Finished difference Result 390 states and 406 transitions. [2021-12-18 20:04:38,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-18 20:04:38,555 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-18 20:04:38,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:38,557 INFO L225 Difference]: With dead ends: 390 [2021-12-18 20:04:38,557 INFO L226 Difference]: Without dead ends: 390 [2021-12-18 20:04:38,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-12-18 20:04:38,558 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 821 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:38,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 183 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 20:04:38,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-12-18 20:04:38,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 90. [2021-12-18 20:04:38,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 83 states have (on average 1.1686746987951808) internal successors, (97), 89 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:38,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2021-12-18 20:04:38,570 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 34 [2021-12-18 20:04:38,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:38,570 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2021-12-18 20:04:38,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:38,570 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2021-12-18 20:04:38,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-18 20:04:38,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:38,571 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1] [2021-12-18 20:04:38,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-18 20:04:38,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:38,788 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 20:04:38,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:38,788 INFO L85 PathProgramCache]: Analyzing trace with hash -256132636, now seen corresponding path program 3 times [2021-12-18 20:04:38,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:38,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060720526] [2021-12-18 20:04:38,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:38,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:39,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:39,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060720526] [2021-12-18 20:04:39,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060720526] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:39,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734288936] [2021-12-18 20:04:39,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:04:39,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:39,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:39,017 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:39,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 20:04:39,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-18 20:04:39,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:39,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-18 20:04:39,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:39,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:04:39,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:04:39,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 20:04:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-18 20:04:39,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:04:39,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734288936] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:39,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:04:39,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 16 [2021-12-18 20:04:39,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271481523] [2021-12-18 20:04:39,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:39,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 20:04:39,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:39,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 20:04:39,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-18 20:04:39,311 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:39,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:39,352 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2021-12-18 20:04:39,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 20:04:39,352 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-18 20:04:39,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:39,352 INFO L225 Difference]: With dead ends: 98 [2021-12-18 20:04:39,353 INFO L226 Difference]: Without dead ends: 98 [2021-12-18 20:04:39,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-18 20:04:39,353 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 53 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:39,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 43 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:04:39,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-18 20:04:39,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2021-12-18 20:04:39,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 88 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:39,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2021-12-18 20:04:39,357 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 44 [2021-12-18 20:04:39,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:39,357 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2021-12-18 20:04:39,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:39,357 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2021-12-18 20:04:39,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-18 20:04:39,358 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:39,358 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:39,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:39,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:39,567 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 20:04:39,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:39,568 INFO L85 PathProgramCache]: Analyzing trace with hash -618447913, now seen corresponding path program 2 times [2021-12-18 20:04:39,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:39,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551434068] [2021-12-18 20:04:39,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:39,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:39,712 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:39,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:39,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551434068] [2021-12-18 20:04:39,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551434068] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:39,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865774389] [2021-12-18 20:04:39,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:04:39,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:39,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:39,720 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:39,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 20:04:39,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:04:39,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:39,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 20:04:39,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:39,897 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:39,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:40,231 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:40,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865774389] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:40,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:40,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2021-12-18 20:04:40,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452849498] [2021-12-18 20:04:40,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:40,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-18 20:04:40,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:40,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-18 20:04:40,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 20:04:40,233 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:40,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:40,806 INFO L93 Difference]: Finished difference Result 802 states and 834 transitions. [2021-12-18 20:04:40,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-18 20:04:40,807 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 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 66 [2021-12-18 20:04:40,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:40,809 INFO L225 Difference]: With dead ends: 802 [2021-12-18 20:04:40,809 INFO L226 Difference]: Without dead ends: 802 [2021-12-18 20:04:40,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 20:04:40,810 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2063 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2063 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:40,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2063 Valid, 348 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 20:04:40,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-12-18 20:04:40,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 153. [2021-12-18 20:04:40,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 147 states have (on average 1.0680272108843538) internal successors, (157), 152 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:40,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 157 transitions. [2021-12-18 20:04:40,825 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 157 transitions. Word has length 66 [2021-12-18 20:04:40,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:40,826 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 157 transitions. [2021-12-18 20:04:40,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:40,826 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 157 transitions. [2021-12-18 20:04:40,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-18 20:04:40,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:40,827 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:40,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:41,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:41,057 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 20:04:41,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:41,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1529191431, now seen corresponding path program 3 times [2021-12-18 20:04:41,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:41,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527964779] [2021-12-18 20:04:41,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:41,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:41,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:41,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527964779] [2021-12-18 20:04:41,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527964779] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:41,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435602749] [2021-12-18 20:04:41,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:04:41,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:41,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:41,540 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:41,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 20:04:41,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-18 20:04:41,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:41,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-18 20:04:41,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:41,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 88 proven. 1 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2021-12-18 20:04:41,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:42,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-12-18 20:04:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2021-12-18 20:04:42,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435602749] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:42,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:42,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 7, 7] total 45 [2021-12-18 20:04:42,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281940489] [2021-12-18 20:04:42,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:42,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-18 20:04:42,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:42,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-18 20:04:42,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=714, Invalid=1266, Unknown=0, NotChecked=0, Total=1980 [2021-12-18 20:04:42,392 INFO L87 Difference]: Start difference. First operand 153 states and 157 transitions. Second operand has 45 states, 45 states have (on average 3.6) internal successors, (162), 45 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:44,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:44,386 INFO L93 Difference]: Finished difference Result 799 states and 836 transitions. [2021-12-18 20:04:44,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-18 20:04:44,386 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6) internal successors, (162), 45 states have internal predecessors, (162), 0 states have call successors, (0), 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 130 [2021-12-18 20:04:44,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:44,389 INFO L225 Difference]: With dead ends: 799 [2021-12-18 20:04:44,389 INFO L226 Difference]: Without dead ends: 799 [2021-12-18 20:04:44,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2133, Invalid=3873, Unknown=0, NotChecked=0, Total=6006 [2021-12-18 20:04:44,391 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 4558 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 1025 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4558 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1025 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:44,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4558 Valid, 371 Invalid, 1579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1025 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-18 20:04:44,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-12-18 20:04:44,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 536. [2021-12-18 20:04:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 530 states have (on average 1.3132075471698113) internal successors, (696), 535 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:44,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 696 transitions. [2021-12-18 20:04:44,401 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 696 transitions. Word has length 130 [2021-12-18 20:04:44,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:44,402 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 696 transitions. [2021-12-18 20:04:44,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6) internal successors, (162), 45 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:44,402 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 696 transitions. [2021-12-18 20:04:44,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-18 20:04:44,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:44,403 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:44,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-18 20:04:44,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:44,638 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 20:04:44,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:44,638 INFO L85 PathProgramCache]: Analyzing trace with hash 730106113, now seen corresponding path program 1 times [2021-12-18 20:04:44,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:44,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270546689] [2021-12-18 20:04:44,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:44,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:44,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:45,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:45,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270546689] [2021-12-18 20:04:45,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270546689] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:45,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500730290] [2021-12-18 20:04:45,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:45,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:45,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:45,112 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:45,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 20:04:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:45,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-18 20:04:45,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:45,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:45,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:46,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:46,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500730290] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:46,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:46,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 67 [2021-12-18 20:04:46,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226551790] [2021-12-18 20:04:46,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:46,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-18 20:04:46,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:46,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-18 20:04:46,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-12-18 20:04:46,574 INFO L87 Difference]: Start difference. First operand 536 states and 696 transitions. Second operand has 67 states, 67 states have (on average 3.970149253731343) internal successors, (266), 67 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:48,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:48,512 INFO L93 Difference]: Finished difference Result 1622 states and 1688 transitions. [2021-12-18 20:04:48,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-18 20:04:48,512 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.970149253731343) internal successors, (266), 67 states have internal predecessors, (266), 0 states have call successors, (0), 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 135 [2021-12-18 20:04:48,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:48,516 INFO L225 Difference]: With dead ends: 1622 [2021-12-18 20:04:48,516 INFO L226 Difference]: Without dead ends: 1622 [2021-12-18 20:04:48,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-12-18 20:04:48,517 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 4848 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 776 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4848 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 776 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:48,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4848 Valid, 723 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [776 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-18 20:04:48,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-12-18 20:04:48,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 668. [2021-12-18 20:04:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 662 states have (on average 1.2507552870090635) internal successors, (828), 667 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:48,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 828 transitions. [2021-12-18 20:04:48,535 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 828 transitions. Word has length 135 [2021-12-18 20:04:48,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:48,535 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 828 transitions. [2021-12-18 20:04:48,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.970149253731343) internal successors, (266), 67 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:48,535 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 828 transitions. [2021-12-18 20:04:48,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-12-18 20:04:48,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:48,537 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:48,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:48,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-18 20:04:48,757 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 20:04:48,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:48,757 INFO L85 PathProgramCache]: Analyzing trace with hash -156264130, now seen corresponding path program 2 times [2021-12-18 20:04:48,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:48,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531157093] [2021-12-18 20:04:48,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:48,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:50,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:50,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:50,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531157093] [2021-12-18 20:04:50,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531157093] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:50,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983716912] [2021-12-18 20:04:50,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:04:50,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:50,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:50,246 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:50,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 20:04:50,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-18 20:04:50,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:50,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 20:04:50,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:52,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2021-12-18 20:04:52,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:04:52,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983716912] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:52,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:04:52,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [67] total 69 [2021-12-18 20:04:52,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154184324] [2021-12-18 20:04:52,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:52,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:04:52,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:52,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:04:52,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2021-12-18 20:04:52,019 INFO L87 Difference]: Start difference. First operand 668 states and 828 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:52,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:52,022 INFO L93 Difference]: Finished difference Result 674 states and 834 transitions. [2021-12-18 20:04:52,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:04:52,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 267 [2021-12-18 20:04:52,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:52,024 INFO L225 Difference]: With dead ends: 674 [2021-12-18 20:04:52,024 INFO L226 Difference]: Without dead ends: 672 [2021-12-18 20:04:52,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2021-12-18 20:04:52,025 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:52,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 56 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2021-12-18 20:04:52,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-12-18 20:04:52,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 671. [2021-12-18 20:04:52,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 665 states have (on average 1.2496240601503759) internal successors, (831), 670 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:52,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 831 transitions. [2021-12-18 20:04:52,035 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 831 transitions. Word has length 267 [2021-12-18 20:04:52,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:52,036 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 831 transitions. [2021-12-18 20:04:52,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:52,036 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 831 transitions. [2021-12-18 20:04:52,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-12-18 20:04:52,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:52,038 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:52,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:52,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-18 20:04:52,255 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 20:04:52,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:52,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1298464006, now seen corresponding path program 1 times [2021-12-18 20:04:52,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:52,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885228304] [2021-12-18 20:04:52,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:52,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8132 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:04:53,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:53,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885228304] [2021-12-18 20:04:53,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885228304] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:53,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464173449] [2021-12-18 20:04:53,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:53,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:53,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:53,689 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:53,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 20:04:53,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:53,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-18 20:04:53,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8132 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:04:54,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8132 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:04:57,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464173449] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:57,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:57,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 133 [2021-12-18 20:04:57,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753952664] [2021-12-18 20:04:57,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:57,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2021-12-18 20:04:57,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:57,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2021-12-18 20:04:57,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2021-12-18 20:04:57,577 INFO L87 Difference]: Start difference. First operand 671 states and 831 transitions. Second operand has 133 states, 133 states have (on average 3.9774436090225564) internal successors, (529), 133 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:05:14,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:05:14,412 INFO L93 Difference]: Finished difference Result 3340 states and 3472 transitions. [2021-12-18 20:05:14,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-12-18 20:05:14,412 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 3.9774436090225564) internal successors, (529), 133 states have internal predecessors, (529), 0 states have call successors, (0), 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 269 [2021-12-18 20:05:14,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:05:14,432 INFO L225 Difference]: With dead ends: 3340 [2021-12-18 20:05:14,432 INFO L226 Difference]: Without dead ends: 3340 [2021-12-18 20:05:14,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2021-12-18 20:05:14,436 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 9522 mSDsluCounter, 1450 mSDsCounter, 0 mSdLazyCounter, 1926 mSolverCounterSat, 1926 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9522 SdHoareTripleChecker+Valid, 1466 SdHoareTripleChecker+Invalid, 3852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1926 IncrementalHoareTripleChecker+Valid, 1926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:05:14,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9522 Valid, 1466 Invalid, 3852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1926 Valid, 1926 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-18 20:05:14,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3340 states. [2021-12-18 20:05:14,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3340 to 935. [2021-12-18 20:05:14,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 929 states have (on average 1.178686759956943) internal successors, (1095), 934 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:05:14,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 1095 transitions. [2021-12-18 20:05:14,452 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 1095 transitions. Word has length 269 [2021-12-18 20:05:14,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:05:14,452 INFO L470 AbstractCegarLoop]: Abstraction has 935 states and 1095 transitions. [2021-12-18 20:05:14,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 3.9774436090225564) internal successors, (529), 133 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:05:14,452 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 1095 transitions. [2021-12-18 20:05:14,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2021-12-18 20:05:14,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:05:14,457 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 130, 130, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:05:14,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-18 20:05:14,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-18 20:05:14,672 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 20:05:14,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:05:14,672 INFO L85 PathProgramCache]: Analyzing trace with hash 470641012, now seen corresponding path program 2 times [2021-12-18 20:05:14,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:05:14,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860995809] [2021-12-18 20:05:14,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:05:14,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:05:14,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:05:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 33674 backedges. 0 proven. 33670 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 20:05:20,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:05:20,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860995809] [2021-12-18 20:05:20,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860995809] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:05:20,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326375203] [2021-12-18 20:05:20,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:05:20,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:05:20,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:05:20,353 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:05:20,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 20:05:20,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-18 20:05:20,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:05:20,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-18 20:05:20,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:05:20,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 20:05:20,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:05:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 33674 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33671 trivial. 0 not checked. [2021-12-18 20:05:29,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:05:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 33674 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33671 trivial. 0 not checked. [2021-12-18 20:05:36,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326375203] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:05:36,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:05:36,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 3, 3] total 137 [2021-12-18 20:05:36,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960603795] [2021-12-18 20:05:36,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:05:36,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2021-12-18 20:05:36,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:05:36,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2021-12-18 20:05:36,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8788, Invalid=9844, Unknown=0, NotChecked=0, Total=18632 [2021-12-18 20:05:36,941 INFO L87 Difference]: Start difference. First operand 935 states and 1095 transitions. Second operand has 137 states, 137 states have (on average 4.102189781021898) internal successors, (562), 137 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:05:46,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:05:46,461 INFO L93 Difference]: Finished difference Result 943 states and 1042 transitions. [2021-12-18 20:05:46,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-12-18 20:05:46,462 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 4.102189781021898) internal successors, (562), 137 states have internal predecessors, (562), 0 states have call successors, (0), 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 533 [2021-12-18 20:05:46,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:05:46,464 INFO L225 Difference]: With dead ends: 943 [2021-12-18 20:05:46,464 INFO L226 Difference]: Without dead ends: 943 [2021-12-18 20:05:46,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1331 GetRequests, 1062 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9430 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=27017, Invalid=46153, Unknown=0, NotChecked=0, Total=73170 [2021-12-18 20:05:46,471 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 838 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:05:46,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [838 Valid, 206 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 468 Invalid, 0 Unknown, 33 Unchecked, 0.4s Time] [2021-12-18 20:05:46,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-12-18 20:05:46,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 937. [2021-12-18 20:05:46,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 933 states have (on average 1.1093247588424437) internal successors, (1035), 936 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:05:46,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1035 transitions. [2021-12-18 20:05:46,496 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1035 transitions. Word has length 533 [2021-12-18 20:05:46,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:05:46,497 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 1035 transitions. [2021-12-18 20:05:46,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 4.102189781021898) internal successors, (562), 137 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:05:46,497 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1035 transitions. [2021-12-18 20:05:46,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2021-12-18 20:05:46,542 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:05:46,543 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:05:46,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-18 20:05:46,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-18 20:05:46,751 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 20:05:46,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:05:46,752 INFO L85 PathProgramCache]: Analyzing trace with hash 2141103496, now seen corresponding path program 1 times [2021-12-18 20:05:46,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:05:46,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291049080] [2021-12-18 20:05:46,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:05:46,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:05:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:05:52,026 INFO L134 CoverageAnalysis]: Checked inductivity of 34191 backedges. 0 proven. 34191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:05:52,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:05:52,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291049080] [2021-12-18 20:05:52,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291049080] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:05:52,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76104645] [2021-12-18 20:05:52,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:05:52,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:05:52,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:05:52,028 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:05:52,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-18 20:05:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:05:52,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 1921 conjuncts, 133 conjunts are in the unsatisfiable core [2021-12-18 20:05:52,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:05:53,327 INFO L134 CoverageAnalysis]: Checked inductivity of 34191 backedges. 0 proven. 34191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:05:53,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:06:05,099 INFO L134 CoverageAnalysis]: Checked inductivity of 34191 backedges. 0 proven. 34191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:06:05,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76104645] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:06:05,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:06:05,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134, 134] total 267 [2021-12-18 20:06:05,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097250244] [2021-12-18 20:06:05,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:06:05,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 267 states [2021-12-18 20:06:05,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:06:05,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 267 interpolants. [2021-12-18 20:06:05,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35511, Invalid=35511, Unknown=0, NotChecked=0, Total=71022 [2021-12-18 20:06:05,110 INFO L87 Difference]: Start difference. First operand 937 states and 1035 transitions. Second operand has 267 states, 267 states have (on average 4.00374531835206) internal successors, (1069), 267 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:09:25,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:09:25,129 INFO L93 Difference]: Finished difference Result 6296 states and 6562 transitions. [2021-12-18 20:09:25,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 266 states. [2021-12-18 20:09:25,129 INFO L78 Accepts]: Start accepts. Automaton has has 267 states, 267 states have (on average 4.00374531835206) internal successors, (1069), 267 states have internal predecessors, (1069), 0 states have call successors, (0), 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 538 [2021-12-18 20:09:25,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:09:25,157 INFO L225 Difference]: With dead ends: 6296 [2021-12-18 20:09:25,157 INFO L226 Difference]: Without dead ends: 6296 [2021-12-18 20:09:25,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1208 GetRequests, 943 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=35511, Invalid=35511, Unknown=0, NotChecked=0, Total=71022 [2021-12-18 20:09:25,160 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 24076 mSDsluCounter, 2919 mSDsCounter, 0 mSdLazyCounter, 3401 mSolverCounterSat, 5159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24076 SdHoareTripleChecker+Valid, 2935 SdHoareTripleChecker+Invalid, 8560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5159 IncrementalHoareTripleChecker+Valid, 3401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:09:25,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24076 Valid, 2935 Invalid, 8560 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5159 Valid, 3401 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-12-18 20:09:25,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6296 states. [2021-12-18 20:09:25,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6296 to 1469. [2021-12-18 20:09:25,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 1465 states have (on average 1.0696245733788396) internal successors, (1567), 1468 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:09:25,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 1567 transitions. [2021-12-18 20:09:25,200 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 1567 transitions. Word has length 538 [2021-12-18 20:09:25,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:09:25,200 INFO L470 AbstractCegarLoop]: Abstraction has 1469 states and 1567 transitions. [2021-12-18 20:09:25,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 267 states, 267 states have (on average 4.00374531835206) internal successors, (1069), 267 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:09:25,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 1567 transitions. [2021-12-18 20:09:25,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1071 [2021-12-18 20:09:25,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:09:25,208 INFO L514 BasicCegarLoop]: trace histogram [264, 264, 264, 264, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:09:25,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-18 20:09:25,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-18 20:09:25,427 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 20:09:25,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:09:25,428 INFO L85 PathProgramCache]: Analyzing trace with hash -488506025, now seen corresponding path program 2 times [2021-12-18 20:09:25,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:09:25,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710819003] [2021-12-18 20:09:25,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:09:25,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:09:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:09:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 139128 backedges. 0 proven. 139128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:09:39,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:09:39,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710819003] [2021-12-18 20:09:39,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710819003] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:09:39,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183479749] [2021-12-18 20:09:39,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:09:39,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:09:39,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:09:39,823 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:09:39,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-18 20:09:40,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-18 20:09:40,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:09:40,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-18 20:09:40,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:09:41,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 20:09:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 139128 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 139128 trivial. 0 not checked. [2021-12-18 20:09:41,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 20:09:41,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183479749] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:09:41,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 20:09:41,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [267] total 273 [2021-12-18 20:09:41,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054617682] [2021-12-18 20:09:41,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:09:41,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 20:09:41,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:09:41,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 20:09:41,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36059, Invalid=38197, Unknown=0, NotChecked=0, Total=74256 [2021-12-18 20:09:41,763 INFO L87 Difference]: Start difference. First operand 1469 states and 1567 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-12-18 20:09:41,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:09:41,817 INFO L93 Difference]: Finished difference Result 1472 states and 1568 transitions. [2021-12-18 20:09:41,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 20:09:41,817 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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 1070 [2021-12-18 20:09:41,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:09:41,821 INFO L225 Difference]: With dead ends: 1472 [2021-12-18 20:09:41,821 INFO L226 Difference]: Without dead ends: 1469 [2021-12-18 20:09:41,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1338 GetRequests, 1065 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2120 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=36601, Invalid=38749, Unknown=0, NotChecked=0, Total=75350 [2021-12-18 20:09:41,823 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:09:41,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 66 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:09:41,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2021-12-18 20:09:41,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1466. [2021-12-18 20:09:41,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1462 states have (on average 1.0690834473324213) internal successors, (1563), 1465 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:09:41,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 1563 transitions. [2021-12-18 20:09:41,834 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 1563 transitions. Word has length 1070 [2021-12-18 20:09:41,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:09:41,835 INFO L470 AbstractCegarLoop]: Abstraction has 1466 states and 1563 transitions. [2021-12-18 20:09:41,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2021-12-18 20:09:41,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 1563 transitions. [2021-12-18 20:09:41,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1073 [2021-12-18 20:09:41,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:09:41,842 INFO L514 BasicCegarLoop]: trace histogram [264, 264, 264, 264, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:09:41,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-18 20:09:42,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-18 20:09:42,058 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-18 20:09:42,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:09:42,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1166647575, now seen corresponding path program 1 times [2021-12-18 20:09:42,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:09:42,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770529866] [2021-12-18 20:09:42,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:09:42,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:09:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:09:56,290 INFO L134 CoverageAnalysis]: Checked inductivity of 139130 backedges. 0 proven. 139128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:09:56,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:09:56,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770529866] [2021-12-18 20:09:56,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770529866] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:09:56,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243393443] [2021-12-18 20:09:56,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:09:56,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:09:56,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:09:56,293 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:09:56,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-18 20:09:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:09:57,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 3796 conjuncts, 266 conjunts are in the unsatisfiable core [2021-12-18 20:09:57,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:09:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 139130 backedges. 0 proven. 139128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:09:58,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:10:37,410 INFO L134 CoverageAnalysis]: Checked inductivity of 139130 backedges. 0 proven. 139128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 20:10:37,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243393443] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:10:37,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:10:37,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [267, 267, 267] total 533 [2021-12-18 20:10:37,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380440488] [2021-12-18 20:10:37,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:10:37,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 533 states [2021-12-18 20:10:37,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:10:37,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 533 interpolants. [2021-12-18 20:10:37,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141778, Invalid=141778, Unknown=0, NotChecked=0, Total=283556 [2021-12-18 20:10:37,463 INFO L87 Difference]: Start difference. First operand 1466 states and 1563 transitions. Second operand has 533 states, 533 states have (on average 4.0037523452157595) internal successors, (2134), 533 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Killed by 15