./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext-properties/test-0232_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-ext-properties/test-0232_1-1.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 86beb7e463e80bf4cd7303ba718fa4bc3c1db625 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-ext-properties/test-0232_1-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 86beb7e463e80bf4cd7303ba718fa4bc3c1db625 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-30 17:37:17,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 17:37:17,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 17:37:17,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 17:37:17,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 17:37:17,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 17:37:17,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 17:37:17,367 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 17:37:17,369 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 17:37:17,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 17:37:17,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 17:37:17,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 17:37:17,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 17:37:17,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 17:37:17,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 17:37:17,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 17:37:17,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 17:37:17,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 17:37:17,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 17:37:17,393 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 17:37:17,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 17:37:17,398 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 17:37:17,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 17:37:17,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 17:37:17,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 17:37:17,404 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 17:37:17,404 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 17:37:17,406 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 17:37:17,406 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 17:37:17,407 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 17:37:17,407 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 17:37:17,408 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 17:37:17,409 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 17:37:17,410 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 17:37:17,411 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 17:37:17,411 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 17:37:17,412 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 17:37:17,412 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 17:37:17,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 17:37:17,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 17:37:17,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 17:37:17,415 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-30 17:37:17,448 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 17:37:17,449 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 17:37:17,450 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 17:37:17,450 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 17:37:17,451 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 17:37:17,452 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 17:37:17,452 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 17:37:17,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 17:37:17,452 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 17:37:17,452 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 17:37:17,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 17:37:17,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 17:37:17,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 17:37:17,454 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 17:37:17,454 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 17:37:17,454 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-30 17:37:17,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 17:37:17,454 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 17:37:17,455 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 17:37:17,455 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 17:37:17,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 17:37:17,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 17:37:17,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 17:37:17,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 17:37:17,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 17:37:17,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 17:37:17,456 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-30 17:37:17,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-30 17:37:17,456 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 17:37:17,457 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86beb7e463e80bf4cd7303ba718fa4bc3c1db625 [2021-08-30 17:37:17,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 17:37:17,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 17:37:17,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 17:37:17,744 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 17:37:17,744 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 17:37:17,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/test-0232_1-1.i [2021-08-30 17:37:17,800 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e16877c6f/e459ed0f628d47bc9ac72d6f04f37279/FLAG09b848079 [2021-08-30 17:37:18,268 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 17:37:18,268 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/test-0232_1-1.i [2021-08-30 17:37:18,281 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e16877c6f/e459ed0f628d47bc9ac72d6f04f37279/FLAG09b848079 [2021-08-30 17:37:18,614 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e16877c6f/e459ed0f628d47bc9ac72d6f04f37279 [2021-08-30 17:37:18,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 17:37:18,619 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 17:37:18,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 17:37:18,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 17:37:18,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 17:37:18,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:37:18" (1/1) ... [2021-08-30 17:37:18,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e9b2d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:37:18, skipping insertion in model container [2021-08-30 17:37:18,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:37:18" (1/1) ... [2021-08-30 17:37:18,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 17:37:18,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 17:37:18,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 17:37:18,885 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 17:37:18,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 17:37:18,973 INFO L208 MainTranslator]: Completed translation [2021-08-30 17:37:18,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:37:18 WrapperNode [2021-08-30 17:37:18,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 17:37:18,975 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 17:37:18,975 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 17:37:18,975 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 17:37:18,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:37:18" (1/1) ... [2021-08-30 17:37:18,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:37:18" (1/1) ... [2021-08-30 17:37:19,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:37:18" (1/1) ... [2021-08-30 17:37:19,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:37:18" (1/1) ... [2021-08-30 17:37:19,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:37:18" (1/1) ... [2021-08-30 17:37:19,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:37:18" (1/1) ... [2021-08-30 17:37:19,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:37:18" (1/1) ... [2021-08-30 17:37:19,038 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 17:37:19,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 17:37:19,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 17:37:19,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 17:37:19,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:37:18" (1/1) ... [2021-08-30 17:37:19,046 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 17:37:19,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:37:19,080 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) [2021-08-30 17:37:19,083 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 [2021-08-30 17:37:19,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 17:37:19,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 17:37:19,110 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-30 17:37:19,110 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-30 17:37:19,110 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-30 17:37:19,110 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-30 17:37:19,110 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-30 17:37:19,111 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-30 17:37:19,111 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-08-30 17:37:19,111 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 17:37:19,112 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-30 17:37:19,112 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-30 17:37:19,112 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-30 17:37:19,113 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-30 17:37:19,113 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-30 17:37:19,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 17:37:19,113 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-30 17:37:19,113 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-30 17:37:19,113 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-30 17:37:19,113 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-30 17:37:19,114 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-30 17:37:19,114 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-30 17:37:19,114 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-30 17:37:19,114 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-30 17:37:19,114 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-30 17:37:19,114 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-30 17:37:19,114 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-30 17:37:19,115 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-30 17:37:19,116 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-30 17:37:19,116 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-30 17:37:19,116 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-30 17:37:19,116 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-30 17:37:19,116 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-30 17:37:19,117 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-30 17:37:19,117 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-30 17:37:19,117 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-30 17:37:19,117 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-30 17:37:19,117 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-30 17:37:19,117 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-30 17:37:19,118 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-30 17:37:19,118 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-30 17:37:19,118 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-30 17:37:19,118 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-30 17:37:19,118 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-30 17:37:19,118 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-30 17:37:19,118 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-30 17:37:19,119 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-30 17:37:19,119 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-30 17:37:19,119 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-30 17:37:19,119 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-30 17:37:19,120 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-30 17:37:19,120 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-30 17:37:19,120 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-30 17:37:19,121 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-30 17:37:19,121 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-30 17:37:19,121 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-30 17:37:19,121 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-30 17:37:19,121 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-30 17:37:19,121 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-30 17:37:19,122 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-30 17:37:19,122 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-30 17:37:19,122 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-30 17:37:19,122 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-30 17:37:19,122 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-30 17:37:19,122 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-30 17:37:19,123 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-30 17:37:19,123 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-30 17:37:19,123 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-30 17:37:19,124 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-30 17:37:19,124 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-30 17:37:19,125 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-30 17:37:19,125 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-30 17:37:19,125 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-30 17:37:19,125 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-30 17:37:19,125 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-30 17:37:19,126 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-30 17:37:19,126 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-30 17:37:19,126 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-30 17:37:19,126 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-30 17:37:19,126 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-30 17:37:19,126 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-30 17:37:19,127 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-30 17:37:19,127 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-30 17:37:19,127 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-30 17:37:19,127 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-30 17:37:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-30 17:37:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-30 17:37:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-30 17:37:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-30 17:37:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-30 17:37:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-30 17:37:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-30 17:37:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-30 17:37:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-30 17:37:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-30 17:37:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-30 17:37:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-30 17:37:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-30 17:37:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-30 17:37:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-30 17:37:19,130 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-30 17:37:19,130 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-30 17:37:19,130 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-30 17:37:19,130 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-30 17:37:19,130 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-30 17:37:19,131 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-30 17:37:19,131 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-30 17:37:19,131 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-30 17:37:19,131 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-30 17:37:19,131 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-30 17:37:19,131 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-30 17:37:19,132 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-30 17:37:19,132 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-30 17:37:19,132 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-30 17:37:19,133 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-30 17:37:19,133 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-30 17:37:19,133 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-30 17:37:19,133 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-30 17:37:19,133 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-30 17:37:19,133 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-30 17:37:19,133 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-30 17:37:19,133 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-30 17:37:19,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-30 17:37:19,134 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-08-30 17:37:19,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-30 17:37:19,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-30 17:37:19,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-30 17:37:19,134 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 17:37:19,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-08-30 17:37:19,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 17:37:19,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 17:37:19,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-30 17:37:19,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 17:37:19,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-30 17:37:19,139 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-30 17:37:19,604 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 17:37:19,605 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-30 17:37:19,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:37:19 BoogieIcfgContainer [2021-08-30 17:37:19,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 17:37:19,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 17:37:19,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 17:37:19,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 17:37:19,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:37:18" (1/3) ... [2021-08-30 17:37:19,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de489b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:37:19, skipping insertion in model container [2021-08-30 17:37:19,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:37:18" (2/3) ... [2021-08-30 17:37:19,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de489b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:37:19, skipping insertion in model container [2021-08-30 17:37:19,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:37:19" (3/3) ... [2021-08-30 17:37:19,614 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0232_1-1.i [2021-08-30 17:37:19,622 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 17:37:19,622 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2021-08-30 17:37:19,666 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 17:37:19,675 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, mConcurrency=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 [2021-08-30 17:37:19,675 INFO L340 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2021-08-30 17:37:19,690 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 49 states have (on average 2.020408163265306) internal successors, (99), 92 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:37:19,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-30 17:37:19,708 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:19,709 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:19,709 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting appendErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:19,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:19,714 INFO L82 PathProgramCache]: Analyzing trace with hash 159106718, now seen corresponding path program 1 times [2021-08-30 17:37:19,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:37:19,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398386374] [2021-08-30 17:37:19,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:19,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:37:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:20,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:37:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:20,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:20,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:37:20,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398386374] [2021-08-30 17:37:20,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398386374] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:37:20,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:37:20,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 17:37:20,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127878422] [2021-08-30 17:37:20,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:37:20,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:37:20,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:37:20,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:37:20,089 INFO L87 Difference]: Start difference. First operand has 99 states, 49 states have (on average 2.020408163265306) internal successors, (99), 92 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:37:20,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:20,406 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2021-08-30 17:37:20,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 17:37:20,408 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-08-30 17:37:20,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:20,419 INFO L225 Difference]: With dead ends: 95 [2021-08-30 17:37:20,419 INFO L226 Difference]: Without dead ends: 92 [2021-08-30 17:37:20,422 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 91.81ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:37:20,425 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 96 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 192.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.07ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 243.60ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:20,426 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 19 Invalid, 374 Unknown, 0 Unchecked, 8.07ms Time], IncrementalHoareTripleChecker [15 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 243.60ms Time] [2021-08-30 17:37:20,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-30 17:37:20,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-08-30 17:37:20,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 85 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:37:20,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2021-08-30 17:37:20,455 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 9 [2021-08-30 17:37:20,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:20,456 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2021-08-30 17:37:20,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:37:20,456 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2021-08-30 17:37:20,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-30 17:37:20,456 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:20,456 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:20,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-30 17:37:20,457 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting appendErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:20,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:20,457 INFO L82 PathProgramCache]: Analyzing trace with hash 159106719, now seen corresponding path program 1 times [2021-08-30 17:37:20,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:37:20,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863492274] [2021-08-30 17:37:20,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:20,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:37:20,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:20,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:37:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:20,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:20,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:37:20,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863492274] [2021-08-30 17:37:20,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863492274] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:37:20,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:37:20,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 17:37:20,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618373588] [2021-08-30 17:37:20,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:37:20,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:37:20,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:37:20,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:37:20,565 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:37:20,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:20,870 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2021-08-30 17:37:20,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:37:20,870 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-08-30 17:37:20,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:20,875 INFO L225 Difference]: With dead ends: 121 [2021-08-30 17:37:20,875 INFO L226 Difference]: Without dead ends: 121 [2021-08-30 17:37:20,877 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 61.39ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:37:20,881 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 86 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 202.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.56ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 253.85ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:20,882 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 14 Invalid, 414 Unknown, 0 Unchecked, 2.56ms Time], IncrementalHoareTripleChecker [11 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 253.85ms Time] [2021-08-30 17:37:20,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-08-30 17:37:20,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 100. [2021-08-30 17:37:20,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 59 states have (on average 1.7966101694915255) internal successors, (106), 94 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:37:20,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 111 transitions. [2021-08-30 17:37:20,890 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 111 transitions. Word has length 9 [2021-08-30 17:37:20,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:20,891 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 111 transitions. [2021-08-30 17:37:20,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:37:20,891 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 111 transitions. [2021-08-30 17:37:20,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 17:37:20,892 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:20,892 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:20,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-30 17:37:20,892 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:20,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:20,893 INFO L82 PathProgramCache]: Analyzing trace with hash 637341052, now seen corresponding path program 1 times [2021-08-30 17:37:20,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:37:20,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7902335] [2021-08-30 17:37:20,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:20,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:37:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:20,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:37:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:20,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:37:20,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7902335] [2021-08-30 17:37:20,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7902335] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:37:20,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:37:20,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 17:37:20,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747844052] [2021-08-30 17:37:20,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 17:37:20,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:37:20,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 17:37:20,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:37:20,943 INFO L87 Difference]: Start difference. First operand 100 states and 111 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:37:21,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:21,094 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2021-08-30 17:37:21,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 17:37:21,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-30 17:37:21,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:21,095 INFO L225 Difference]: With dead ends: 96 [2021-08-30 17:37:21,095 INFO L226 Difference]: Without dead ends: 96 [2021-08-30 17:37:21,096 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.94ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:37:21,097 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 112.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.16ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 142.62ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:21,097 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 10 Invalid, 236 Unknown, 0 Unchecked, 1.16ms Time], IncrementalHoareTripleChecker [6 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 142.62ms Time] [2021-08-30 17:37:21,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-08-30 17:37:21,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-08-30 17:37:21,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 59 states have (on average 1.7118644067796611) internal successors, (101), 90 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:37:21,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2021-08-30 17:37:21,103 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 10 [2021-08-30 17:37:21,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:21,104 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2021-08-30 17:37:21,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:37:21,104 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2021-08-30 17:37:21,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 17:37:21,104 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:21,105 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:21,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-30 17:37:21,105 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:21,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:21,105 INFO L82 PathProgramCache]: Analyzing trace with hash 637341053, now seen corresponding path program 1 times [2021-08-30 17:37:21,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:37:21,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704743652] [2021-08-30 17:37:21,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:21,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:37:21,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:21,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:37:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:21,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:37:21,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704743652] [2021-08-30 17:37:21,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704743652] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:37:21,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:37:21,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 17:37:21,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971028243] [2021-08-30 17:37:21,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 17:37:21,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:37:21,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 17:37:21,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:37:21,179 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:37:21,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:21,325 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2021-08-30 17:37:21,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 17:37:21,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-30 17:37:21,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:21,328 INFO L225 Difference]: With dead ends: 92 [2021-08-30 17:37:21,328 INFO L226 Difference]: Without dead ends: 92 [2021-08-30 17:37:21,328 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.75ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:37:21,332 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 112.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.14ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 139.52ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:21,332 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 10 Invalid, 228 Unknown, 0 Unchecked, 1.14ms Time], IncrementalHoareTripleChecker [6 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 139.52ms Time] [2021-08-30 17:37:21,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-30 17:37:21,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-08-30 17:37:21,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 59 states have (on average 1.6271186440677967) internal successors, (96), 86 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:37:21,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-08-30 17:37:21,337 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 10 [2021-08-30 17:37:21,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:21,338 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-08-30 17:37:21,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:37:21,338 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-08-30 17:37:21,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-30 17:37:21,339 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:21,339 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:21,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-30 17:37:21,339 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:21,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:21,340 INFO L82 PathProgramCache]: Analyzing trace with hash 403096809, now seen corresponding path program 1 times [2021-08-30 17:37:21,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:37:21,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27989687] [2021-08-30 17:37:21,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:21,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:37:21,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:21,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:37:21,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:21,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:37:21,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27989687] [2021-08-30 17:37:21,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27989687] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:37:21,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:37:21,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-30 17:37:21,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795145336] [2021-08-30 17:37:21,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 17:37:21,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:37:21,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 17:37:21,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:37:21,465 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:37:21,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:21,866 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2021-08-30 17:37:21,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-30 17:37:21,867 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-08-30 17:37:21,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:21,867 INFO L225 Difference]: With dead ends: 103 [2021-08-30 17:37:21,867 INFO L226 Difference]: Without dead ends: 103 [2021-08-30 17:37:21,868 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 158.32ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-08-30 17:37:21,868 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 229.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.85ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 282.08ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:21,869 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 40 Invalid, 645 Unknown, 0 Unchecked, 6.85ms Time], IncrementalHoareTripleChecker [10 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 282.08ms Time] [2021-08-30 17:37:21,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-08-30 17:37:21,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2021-08-30 17:37:21,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 65 states have (on average 1.5692307692307692) internal successors, (102), 92 states have internal predecessors, (102), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:37:21,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2021-08-30 17:37:21,876 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 15 [2021-08-30 17:37:21,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:21,876 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2021-08-30 17:37:21,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:37:21,876 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2021-08-30 17:37:21,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-30 17:37:21,877 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:21,877 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:21,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-30 17:37:21,877 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:21,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:21,878 INFO L82 PathProgramCache]: Analyzing trace with hash -388622655, now seen corresponding path program 1 times [2021-08-30 17:37:21,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:37:21,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36501281] [2021-08-30 17:37:21,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:21,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:37:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:21,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:37:21,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:21,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:37:21,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36501281] [2021-08-30 17:37:21,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36501281] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:37:21,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:37:21,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-30 17:37:21,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131704624] [2021-08-30 17:37:21,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 17:37:21,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:37:21,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 17:37:21,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:37:21,993 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:37:22,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:22,209 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2021-08-30 17:37:22,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:37:22,210 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-08-30 17:37:22,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:22,211 INFO L225 Difference]: With dead ends: 98 [2021-08-30 17:37:22,211 INFO L226 Difference]: Without dead ends: 98 [2021-08-30 17:37:22,211 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 64.89ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-30 17:37:22,212 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 94 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 146.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.71ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 176.77ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:22,212 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 20 Invalid, 375 Unknown, 0 Unchecked, 1.71ms Time], IncrementalHoareTripleChecker [7 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 176.77ms Time] [2021-08-30 17:37:22,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-30 17:37:22,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2021-08-30 17:37:22,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 62 states have (on average 1.5806451612903225) internal successors, (98), 88 states have internal predecessors, (98), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:37:22,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2021-08-30 17:37:22,217 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 16 [2021-08-30 17:37:22,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:22,217 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2021-08-30 17:37:22,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:37:22,217 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2021-08-30 17:37:22,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-30 17:37:22,218 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:22,218 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:22,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-30 17:37:22,218 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:22,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:22,219 INFO L82 PathProgramCache]: Analyzing trace with hash 482359371, now seen corresponding path program 1 times [2021-08-30 17:37:22,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:37:22,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461092450] [2021-08-30 17:37:22,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:22,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:37:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:22,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:37:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:22,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:37:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:22,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:22,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:37:22,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461092450] [2021-08-30 17:37:22,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461092450] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:37:22,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:37:22,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-30 17:37:22,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660943802] [2021-08-30 17:37:22,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 17:37:22,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:37:22,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 17:37:22,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:37:22,373 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:37:22,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:22,732 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2021-08-30 17:37:22,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 17:37:22,733 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-08-30 17:37:22,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:22,733 INFO L225 Difference]: With dead ends: 111 [2021-08-30 17:37:22,733 INFO L226 Difference]: Without dead ends: 111 [2021-08-30 17:37:22,733 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 110.94ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-30 17:37:22,734 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 52 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 244.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.06ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 295.74ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:22,734 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 24 Invalid, 618 Unknown, 0 Unchecked, 3.06ms Time], IncrementalHoareTripleChecker [9 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 295.74ms Time] [2021-08-30 17:37:22,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-30 17:37:22,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 95. [2021-08-30 17:37:22,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 62 states have (on average 1.564516129032258) internal successors, (97), 88 states have internal predecessors, (97), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:37:22,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2021-08-30 17:37:22,754 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 25 [2021-08-30 17:37:22,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:22,755 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2021-08-30 17:37:22,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:37:22,756 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2021-08-30 17:37:22,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-30 17:37:22,757 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:22,757 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:22,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-30 17:37:22,757 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:22,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:22,758 INFO L82 PathProgramCache]: Analyzing trace with hash 482359372, now seen corresponding path program 1 times [2021-08-30 17:37:22,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:37:22,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818509106] [2021-08-30 17:37:22,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:22,759 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:37:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:22,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:37:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:22,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:37:22,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:22,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:37:22,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818509106] [2021-08-30 17:37:22,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818509106] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:37:22,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:37:22,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-30 17:37:22,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76857839] [2021-08-30 17:37:22,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 17:37:22,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:37:22,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 17:37:22,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:37:22,932 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:37:23,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:23,241 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2021-08-30 17:37:23,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 17:37:23,241 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-08-30 17:37:23,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:23,242 INFO L225 Difference]: With dead ends: 106 [2021-08-30 17:37:23,242 INFO L226 Difference]: Without dead ends: 106 [2021-08-30 17:37:23,243 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 113.58ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-30 17:37:23,243 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 70 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 204.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.43ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 242.55ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:23,243 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 21 Invalid, 525 Unknown, 0 Unchecked, 2.43ms Time], IncrementalHoareTripleChecker [8 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 242.55ms Time] [2021-08-30 17:37:23,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-08-30 17:37:23,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2021-08-30 17:37:23,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 62 states have (on average 1.532258064516129) internal successors, (95), 87 states have internal predecessors, (95), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:37:23,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2021-08-30 17:37:23,247 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 25 [2021-08-30 17:37:23,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:23,247 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2021-08-30 17:37:23,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:37:23,248 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2021-08-30 17:37:23,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-30 17:37:23,248 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:23,248 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:23,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-30 17:37:23,249 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:23,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:23,249 INFO L82 PathProgramCache]: Analyzing trace with hash 482345437, now seen corresponding path program 1 times [2021-08-30 17:37:23,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:37:23,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105234025] [2021-08-30 17:37:23,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:23,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:37:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:23,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:37:23,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:23,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:37:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:23,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:23,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:37:23,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105234025] [2021-08-30 17:37:23,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105234025] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:37:23,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:37:23,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 17:37:23,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447866757] [2021-08-30 17:37:23,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 17:37:23,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:37:23,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 17:37:23,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-30 17:37:23,332 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:37:23,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:23,454 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2021-08-30 17:37:23,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 17:37:23,454 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-08-30 17:37:23,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:23,455 INFO L225 Difference]: With dead ends: 76 [2021-08-30 17:37:23,455 INFO L226 Difference]: Without dead ends: 76 [2021-08-30 17:37:23,455 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.71ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:37:23,456 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 31 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.07ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 102.74ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:23,456 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 14 Invalid, 220 Unknown, 0 Unchecked, 1.07ms Time], IncrementalHoareTripleChecker [5 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 102.74ms Time] [2021-08-30 17:37:23,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-30 17:37:23,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-08-30 17:37:23,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 53 states have (on average 1.4339622641509433) internal successors, (76), 69 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:37:23,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2021-08-30 17:37:23,459 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 25 [2021-08-30 17:37:23,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:23,459 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2021-08-30 17:37:23,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:37:23,459 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2021-08-30 17:37:23,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-30 17:37:23,460 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:23,460 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:23,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-30 17:37:23,460 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr29ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:23,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:23,460 INFO L82 PathProgramCache]: Analyzing trace with hash 483581567, now seen corresponding path program 1 times [2021-08-30 17:37:23,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:37:23,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981317408] [2021-08-30 17:37:23,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:23,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:37:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:23,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:37:23,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:23,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:37:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:23,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:23,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:37:23,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981317408] [2021-08-30 17:37:23,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981317408] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:37:23,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:37:23,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 17:37:23,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761885330] [2021-08-30 17:37:23,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:37:23,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:37:23,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:37:23,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:37:23,521 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:37:23,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:23,668 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2021-08-30 17:37:23,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 17:37:23,669 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-08-30 17:37:23,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:23,670 INFO L225 Difference]: With dead ends: 72 [2021-08-30 17:37:23,670 INFO L226 Difference]: Without dead ends: 72 [2021-08-30 17:37:23,670 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.46ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-30 17:37:23,670 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.32ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 127.32ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:23,671 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 23 Invalid, 281 Unknown, 0 Unchecked, 1.32ms Time], IncrementalHoareTripleChecker [8 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 127.32ms Time] [2021-08-30 17:37:23,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-30 17:37:23,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-08-30 17:37:23,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 64 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:37:23,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2021-08-30 17:37:23,673 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 25 [2021-08-30 17:37:23,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:23,673 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2021-08-30 17:37:23,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:37:23,674 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2021-08-30 17:37:23,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-30 17:37:23,674 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:23,674 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:23,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-30 17:37:23,674 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr13ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:23,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:23,675 INFO L82 PathProgramCache]: Analyzing trace with hash -992523117, now seen corresponding path program 1 times [2021-08-30 17:37:23,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:37:23,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618717979] [2021-08-30 17:37:23,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:23,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:37:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:23,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:37:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:23,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:37:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:23,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:37:23,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618717979] [2021-08-30 17:37:23,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618717979] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:37:23,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:37:23,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-30 17:37:23,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113352867] [2021-08-30 17:37:23,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 17:37:23,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:37:23,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 17:37:23,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:37:23,760 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:37:23,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:23,981 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2021-08-30 17:37:23,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 17:37:23,982 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-08-30 17:37:23,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:23,983 INFO L225 Difference]: With dead ends: 70 [2021-08-30 17:37:23,983 INFO L226 Difference]: Without dead ends: 70 [2021-08-30 17:37:23,983 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 83.94ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-30 17:37:23,985 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 131.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.72ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 162.75ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:23,985 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 19 Invalid, 392 Unknown, 0 Unchecked, 4.72ms Time], IncrementalHoareTripleChecker [7 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 162.75ms Time] [2021-08-30 17:37:23,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-30 17:37:23,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-08-30 17:37:23,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 48 states have (on average 1.375) internal successors, (66), 63 states have internal predecessors, (66), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:37:23,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2021-08-30 17:37:23,988 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 28 [2021-08-30 17:37:23,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:23,989 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2021-08-30 17:37:23,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:37:23,989 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2021-08-30 17:37:23,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-30 17:37:23,992 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:23,992 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:23,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-30 17:37:23,993 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr14ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:23,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:23,993 INFO L82 PathProgramCache]: Analyzing trace with hash -703445460, now seen corresponding path program 1 times [2021-08-30 17:37:23,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:37:23,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211118757] [2021-08-30 17:37:23,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:23,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:37:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:24,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:37:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:24,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:37:24,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:24,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:37:24,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211118757] [2021-08-30 17:37:24,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211118757] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:37:24,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:37:24,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-30 17:37:24,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303685672] [2021-08-30 17:37:24,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 17:37:24,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:37:24,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 17:37:24,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:37:24,092 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:37:24,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:24,348 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2021-08-30 17:37:24,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 17:37:24,349 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2021-08-30 17:37:24,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:24,350 INFO L225 Difference]: With dead ends: 69 [2021-08-30 17:37:24,350 INFO L226 Difference]: Without dead ends: 69 [2021-08-30 17:37:24,350 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 92.80ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-30 17:37:24,350 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 161.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.06ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 193.81ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:24,351 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 21 Invalid, 415 Unknown, 0 Unchecked, 2.06ms Time], IncrementalHoareTripleChecker [7 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 193.81ms Time] [2021-08-30 17:37:24,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-30 17:37:24,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-08-30 17:37:24,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 62 states have internal predecessors, (65), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:37:24,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-08-30 17:37:24,353 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 29 [2021-08-30 17:37:24,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:24,354 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-08-30 17:37:24,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:37:24,354 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-08-30 17:37:24,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-30 17:37:24,355 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:24,355 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:24,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-30 17:37:24,355 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting appendErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:24,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:24,356 INFO L82 PathProgramCache]: Analyzing trace with hash 413622409, now seen corresponding path program 1 times [2021-08-30 17:37:24,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:37:24,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450951799] [2021-08-30 17:37:24,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:24,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:37:24,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:24,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:37:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:24,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:37:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:24,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:24,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:37:24,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450951799] [2021-08-30 17:37:24,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450951799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:37:24,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097525315] [2021-08-30 17:37:24,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:24,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:37:24,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:37:24,508 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) [2021-08-30 17:37:24,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-30 17:37:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:24,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-30 17:37:24,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:37:24,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-30 17:37:24,921 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-08-30 17:37:24,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-08-30 17:37:25,020 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-30 17:37:25,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-08-30 17:37:25,165 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-30 17:37:25,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2021-08-30 17:37:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:25,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:37:25,409 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 44 treesize of output 40 [2021-08-30 17:37:25,634 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-30 17:37:25,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:37:25,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-30 17:37:25,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812259745] [2021-08-30 17:37:25,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-30 17:37:25,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:37:25,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-30 17:37:25,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-08-30 17:37:25,637 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:37:26,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:26,131 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2021-08-30 17:37:26,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-30 17:37:26,131 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-08-30 17:37:26,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:26,132 INFO L225 Difference]: With dead ends: 75 [2021-08-30 17:37:26,132 INFO L226 Difference]: Without dead ends: 75 [2021-08-30 17:37:26,133 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 518.43ms TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-08-30 17:37:26,133 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 56 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 240.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.97ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 287.75ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:26,133 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 33 Invalid, 651 Unknown, 0 Unchecked, 2.97ms Time], IncrementalHoareTripleChecker [17 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 287.75ms Time] [2021-08-30 17:37:26,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-30 17:37:26,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-08-30 17:37:26,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 66 states have internal predecessors, (68), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:37:26,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2021-08-30 17:37:26,136 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 30 [2021-08-30 17:37:26,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:26,137 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2021-08-30 17:37:26,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:37:26,137 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2021-08-30 17:37:26,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-30 17:37:26,137 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:26,137 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:26,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-30 17:37:26,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-30 17:37:26,338 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting appendErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:26,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:26,339 INFO L82 PathProgramCache]: Analyzing trace with hash 413622410, now seen corresponding path program 1 times [2021-08-30 17:37:26,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:37:26,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474882339] [2021-08-30 17:37:26,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:26,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:37:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:26,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:37:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:26,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:37:26,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:26,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:37:26,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474882339] [2021-08-30 17:37:26,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474882339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:37:26,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510189322] [2021-08-30 17:37:26,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:26,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:37:26,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:37:26,553 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) [2021-08-30 17:37:26,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-30 17:37:26,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:26,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-30 17:37:26,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:37:26,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-08-30 17:37:26,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 17:37:26,894 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-30 17:37:26,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-08-30 17:37:26,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-08-30 17:37:27,002 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-30 17:37:27,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 46 [2021-08-30 17:37:27,014 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-30 17:37:27,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 46 [2021-08-30 17:37:27,136 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-30 17:37:27,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 50 [2021-08-30 17:37:27,141 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-30 17:37:27,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 24 [2021-08-30 17:37:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:27,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:37:27,559 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 91 treesize of output 87 [2021-08-30 17:37:27,562 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 142 treesize of output 130 [2021-08-30 17:37:27,697 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 52 treesize of output 48 [2021-08-30 17:37:27,703 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-30 17:37:27,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 47 [2021-08-30 17:37:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:27,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510189322] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:37:27,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:37:27,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2021-08-30 17:37:27,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644299816] [2021-08-30 17:37:27,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-30 17:37:27,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:37:27,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-30 17:37:27,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-08-30 17:37:27,816 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 27 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 5 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-30 17:37:28,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:28,348 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2021-08-30 17:37:28,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-30 17:37:28,348 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 5 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-08-30 17:37:28,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:28,349 INFO L225 Difference]: With dead ends: 100 [2021-08-30 17:37:28,349 INFO L226 Difference]: Without dead ends: 100 [2021-08-30 17:37:28,350 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 611.28ms TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2021-08-30 17:37:28,350 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 95 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 243.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.44ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 310.48ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:28,350 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 55 Invalid, 904 Unknown, 0 Unchecked, 3.44ms Time], IncrementalHoareTripleChecker [10 Valid, 614 Invalid, 0 Unknown, 280 Unchecked, 310.48ms Time] [2021-08-30 17:37:28,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-30 17:37:28,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2021-08-30 17:37:28,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 81 states have internal predecessors, (85), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-30 17:37:28,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2021-08-30 17:37:28,354 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 30 [2021-08-30 17:37:28,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:28,354 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2021-08-30 17:37:28,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 5 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-30 17:37:28,354 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2021-08-30 17:37:28,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-30 17:37:28,355 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:28,355 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:28,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-30 17:37:28,568 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,SelfDestructingSolverStorable13 [2021-08-30 17:37:28,569 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr15ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:28,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:28,569 INFO L82 PathProgramCache]: Analyzing trace with hash -331972683, now seen corresponding path program 1 times [2021-08-30 17:37:28,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:37:28,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449256819] [2021-08-30 17:37:28,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:28,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:37:28,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:28,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:37:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:28,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:37:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:28,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:28,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:37:28,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449256819] [2021-08-30 17:37:28,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449256819] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:37:28,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:37:28,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 17:37:28,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129217698] [2021-08-30 17:37:28,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 17:37:28,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:37:28,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 17:37:28,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-30 17:37:28,643 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:37:28,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:28,818 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2021-08-30 17:37:28,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:37:28,819 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-08-30 17:37:28,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:28,820 INFO L225 Difference]: With dead ends: 89 [2021-08-30 17:37:28,820 INFO L226 Difference]: Without dead ends: 89 [2021-08-30 17:37:28,820 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 58.31ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-30 17:37:28,820 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 117.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.03ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 142.53ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:28,821 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 24 Invalid, 336 Unknown, 0 Unchecked, 2.03ms Time], IncrementalHoareTripleChecker [4 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 142.53ms Time] [2021-08-30 17:37:28,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-30 17:37:28,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-08-30 17:37:28,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 80 states have internal predecessors, (84), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-30 17:37:28,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2021-08-30 17:37:28,824 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 30 [2021-08-30 17:37:28,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:28,824 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2021-08-30 17:37:28,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:37:28,824 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2021-08-30 17:37:28,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-30 17:37:28,824 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:28,824 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:28,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-30 17:37:28,825 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:28,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:28,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1701218481, now seen corresponding path program 1 times [2021-08-30 17:37:28,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:37:28,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132156066] [2021-08-30 17:37:28,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:28,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:37:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:28,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:37:28,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:28,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:37:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:28,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:28,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:37:28,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132156066] [2021-08-30 17:37:28,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132156066] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:37:28,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:37:28,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-30 17:37:28,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017458746] [2021-08-30 17:37:28,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 17:37:28,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:37:28,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 17:37:28,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:37:28,966 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:37:29,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:29,170 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2021-08-30 17:37:29,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 17:37:29,171 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2021-08-30 17:37:29,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:29,171 INFO L225 Difference]: With dead ends: 88 [2021-08-30 17:37:29,171 INFO L226 Difference]: Without dead ends: 88 [2021-08-30 17:37:29,171 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 79.22ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-30 17:37:29,172 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 42 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 133.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.65ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 160.50ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:29,172 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 11 Invalid, 357 Unknown, 0 Unchecked, 1.65ms Time], IncrementalHoareTripleChecker [9 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 160.50ms Time] [2021-08-30 17:37:29,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-30 17:37:29,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-08-30 17:37:29,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.2388059701492538) internal successors, (83), 79 states have internal predecessors, (83), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-30 17:37:29,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2021-08-30 17:37:29,175 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 31 [2021-08-30 17:37:29,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:29,175 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2021-08-30 17:37:29,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:37:29,175 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2021-08-30 17:37:29,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-30 17:37:29,176 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:29,176 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:29,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-30 17:37:29,176 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:29,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:29,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1701218480, now seen corresponding path program 1 times [2021-08-30 17:37:29,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:37:29,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454412185] [2021-08-30 17:37:29,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:29,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:37:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:29,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:37:29,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:29,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-30 17:37:29,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:29,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:37:29,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454412185] [2021-08-30 17:37:29,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454412185] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:37:29,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:37:29,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 17:37:29,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22562656] [2021-08-30 17:37:29,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:37:29,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:37:29,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:37:29,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:37:29,246 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:37:29,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:29,364 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2021-08-30 17:37:29,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 17:37:29,364 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2021-08-30 17:37:29,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:29,365 INFO L225 Difference]: With dead ends: 84 [2021-08-30 17:37:29,365 INFO L226 Difference]: Without dead ends: 84 [2021-08-30 17:37:29,365 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 44.31ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-30 17:37:29,366 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.75ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 97.64ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:29,366 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 16 Invalid, 192 Unknown, 0 Unchecked, 1.75ms Time], IncrementalHoareTripleChecker [9 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 97.64ms Time] [2021-08-30 17:37:29,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-30 17:37:29,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-08-30 17:37:29,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 67 states have (on average 1.1791044776119404) internal successors, (79), 75 states have internal predecessors, (79), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-30 17:37:29,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2021-08-30 17:37:29,369 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 31 [2021-08-30 17:37:29,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:29,370 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2021-08-30 17:37:29,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 17:37:29,370 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2021-08-30 17:37:29,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-30 17:37:29,370 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:29,371 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:29,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-30 17:37:29,371 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr29ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:29,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:29,371 INFO L82 PathProgramCache]: Analyzing trace with hash 930259001, now seen corresponding path program 1 times [2021-08-30 17:37:29,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:37:29,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756465893] [2021-08-30 17:37:29,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:29,372 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:37:29,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 17:37:29,393 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-30 17:37:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 17:37:29,428 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-30 17:37:29,428 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-30 17:37:29,429 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr29ENSURES_VIOLATIONMEMORY_LEAK (43 of 44 remaining) [2021-08-30 17:37:29,430 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION (42 of 44 remaining) [2021-08-30 17:37:29,431 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION (41 of 44 remaining) [2021-08-30 17:37:29,431 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION (40 of 44 remaining) [2021-08-30 17:37:29,431 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION (39 of 44 remaining) [2021-08-30 17:37:29,431 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE (38 of 44 remaining) [2021-08-30 17:37:29,431 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5ASSERT_VIOLATIONMEMORY_FREE (37 of 44 remaining) [2021-08-30 17:37:29,431 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_FREE (36 of 44 remaining) [2021-08-30 17:37:29,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION (35 of 44 remaining) [2021-08-30 17:37:29,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION (34 of 44 remaining) [2021-08-30 17:37:29,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION (33 of 44 remaining) [2021-08-30 17:37:29,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION (32 of 44 remaining) [2021-08-30 17:37:29,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION (31 of 44 remaining) [2021-08-30 17:37:29,432 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION (30 of 44 remaining) [2021-08-30 17:37:29,433 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13ASSERT_VIOLATIONMEMORY_FREE (29 of 44 remaining) [2021-08-30 17:37:29,433 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14ASSERT_VIOLATIONMEMORY_FREE (28 of 44 remaining) [2021-08-30 17:37:29,433 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15ASSERT_VIOLATIONMEMORY_FREE (27 of 44 remaining) [2021-08-30 17:37:29,433 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION (26 of 44 remaining) [2021-08-30 17:37:29,433 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION (25 of 44 remaining) [2021-08-30 17:37:29,433 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION (24 of 44 remaining) [2021-08-30 17:37:29,433 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION (23 of 44 remaining) [2021-08-30 17:37:29,434 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION (22 of 44 remaining) [2021-08-30 17:37:29,434 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION (21 of 44 remaining) [2021-08-30 17:37:29,434 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION (20 of 44 remaining) [2021-08-30 17:37:29,434 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION (19 of 44 remaining) [2021-08-30 17:37:29,434 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24ASSERT_VIOLATIONMEMORY_FREE (18 of 44 remaining) [2021-08-30 17:37:29,434 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25ASSERT_VIOLATIONMEMORY_FREE (17 of 44 remaining) [2021-08-30 17:37:29,435 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26ASSERT_VIOLATIONMEMORY_FREE (16 of 44 remaining) [2021-08-30 17:37:29,435 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION (15 of 44 remaining) [2021-08-30 17:37:29,435 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION (14 of 44 remaining) [2021-08-30 17:37:29,435 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr0REQUIRES_VIOLATION (13 of 44 remaining) [2021-08-30 17:37:29,435 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr1REQUIRES_VIOLATION (12 of 44 remaining) [2021-08-30 17:37:29,435 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr2REQUIRES_VIOLATION (11 of 44 remaining) [2021-08-30 17:37:29,435 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr3REQUIRES_VIOLATION (10 of 44 remaining) [2021-08-30 17:37:29,436 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr4REQUIRES_VIOLATION (9 of 44 remaining) [2021-08-30 17:37:29,436 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr5REQUIRES_VIOLATION (8 of 44 remaining) [2021-08-30 17:37:29,436 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr6REQUIRES_VIOLATION (7 of 44 remaining) [2021-08-30 17:37:29,436 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr7REQUIRES_VIOLATION (6 of 44 remaining) [2021-08-30 17:37:29,436 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr8REQUIRES_VIOLATION (5 of 44 remaining) [2021-08-30 17:37:29,436 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr9REQUIRES_VIOLATION (4 of 44 remaining) [2021-08-30 17:37:29,436 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr10REQUIRES_VIOLATION (3 of 44 remaining) [2021-08-30 17:37:29,437 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr11REQUIRES_VIOLATION (2 of 44 remaining) [2021-08-30 17:37:29,437 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr12REQUIRES_VIOLATION (1 of 44 remaining) [2021-08-30 17:37:29,437 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr13REQUIRES_VIOLATION (0 of 44 remaining) [2021-08-30 17:37:29,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-30 17:37:29,442 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 17:37:29,452 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-08-30 17:37:29,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 05:37:29 BoogieIcfgContainer [2021-08-30 17:37:29,467 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 17:37:29,468 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 17:37:29,468 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 17:37:29,468 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 17:37:29,468 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:37:19" (3/4) ... [2021-08-30 17:37:29,470 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-30 17:37:29,471 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 17:37:29,471 INFO L158 Benchmark]: Toolchain (without parser) took 10852.60ms. Allocated memory was 54.5MB in the beginning and 113.2MB in the end (delta: 58.7MB). Free memory was 31.0MB in the beginning and 57.7MB in the end (delta: -26.7MB). Peak memory consumption was 32.2MB. Max. memory is 16.1GB. [2021-08-30 17:37:29,471 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 54.5MB. Free memory was 35.9MB in the beginning and 35.9MB in the end (delta: 73.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 17:37:29,472 INFO L158 Benchmark]: CACSL2BoogieTranslator took 352.33ms. Allocated memory is still 54.5MB. Free memory was 30.8MB in the beginning and 33.4MB in the end (delta: -2.5MB). Peak memory consumption was 17.1MB. Max. memory is 16.1GB. [2021-08-30 17:37:29,472 INFO L158 Benchmark]: Boogie Preprocessor took 63.31ms. Allocated memory is still 54.5MB. Free memory was 33.4MB in the beginning and 30.6MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-30 17:37:29,472 INFO L158 Benchmark]: RCFGBuilder took 567.42ms. Allocated memory was 54.5MB in the beginning and 73.4MB in the end (delta: 18.9MB). Free memory was 30.4MB in the beginning and 45.8MB in the end (delta: -15.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-08-30 17:37:29,473 INFO L158 Benchmark]: TraceAbstraction took 9859.03ms. Allocated memory was 73.4MB in the beginning and 113.2MB in the end (delta: 39.8MB). Free memory was 45.3MB in the beginning and 57.7MB in the end (delta: -12.5MB). Peak memory consumption was 25.6MB. Max. memory is 16.1GB. [2021-08-30 17:37:29,473 INFO L158 Benchmark]: Witness Printer took 2.94ms. Allocated memory is still 113.2MB. Free memory is still 57.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 17:37:29,474 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 54.5MB. Free memory was 35.9MB in the beginning and 35.9MB in the end (delta: 73.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 352.33ms. Allocated memory is still 54.5MB. Free memory was 30.8MB in the beginning and 33.4MB in the end (delta: -2.5MB). Peak memory consumption was 17.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 63.31ms. Allocated memory is still 54.5MB. Free memory was 33.4MB in the beginning and 30.6MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 567.42ms. Allocated memory was 54.5MB in the beginning and 73.4MB in the end (delta: 18.9MB). Free memory was 30.4MB in the beginning and 45.8MB in the end (delta: -15.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 9859.03ms. Allocated memory was 73.4MB in the beginning and 113.2MB in the end (delta: 39.8MB). Free memory was 45.3MB in the beginning and 57.7MB in the end (delta: -12.5MB). Peak memory consumption was 25.6MB. Max. memory is 16.1GB. * Witness Printer took 2.94ms. Allocated memory is still 113.2MB. Free memory is still 57.7MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 539]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 539. Possible FailurePath: [L524] int c = 0; VAL [\old(c)=51, c=0] [L541] struct item *list = ((void *)0); [L542] int length = 0; VAL [\old(c)=0, c=0, length=0, list={3:0}] [L544] CALL append(&list) VAL [\old(c)=0, c=0, plist={3:0}] [L531] c++ [L532] struct item *item = malloc(sizeof *item); [L533] EXPR \read(**plist) VAL [\old(c)=0, \read(**plist)={0:0}, c=1, item={1:0}, plist={3:0}, plist={3:0}] [L533] item->next = *plist VAL [\old(c)=0, \read(**plist)={0:0}, c=1, item={1:0}, plist={3:0}, plist={3:0}] [L534] EXPR item->next VAL [\old(c)=0, c=1, item={1:0}, item->next={0:0}, plist={3:0}, plist={3:0}] [L534-L536] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L534-L536] EXPR (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={-1:0}, \old(c)=0, c=1, item={1:0}, item->next={0:0}, malloc(sizeof *item)={-1:0}, plist={3:0}, plist={3:0}] [L534-L536] item->data = (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={-1:0}, \old(c)=0, c=1, item={1:0}, item->next={0:0}, malloc(sizeof *item)={-1:0}, plist={3:0}, plist={3:0}] [L537] *plist = item VAL [\old(c)=0, c=1, item={1:0}, plist={3:0}, plist={3:0}] [L544] RET append(&list) VAL [\old(c)=0, c=1, length=0, list={3:0}] [L545] length++ VAL [\old(c)=0, c=1, length=1, list={3:0}] [L546] COND FALSE !(__VERIFIER_nondet_int() && c < 20) [L547] COND TRUE length > 0 VAL [\old(c)=0, c=1, length=1, list={3:0}] [L548] COND FALSE !(length < 0) VAL [\old(c)=0, c=1, length=1, list={3:0}] [L551] EXPR \read(*list) VAL [\old(c)=0, \read(*list)={1:0}, c=1, length=1, list={3:0}] [L551] EXPR list->next VAL [\old(c)=0, \read(*list)={1:0}, c=1, length=1, list={3:0}, list->next={0:0}] [L551] struct item *next = list->next; [L552] EXPR \read(*list) VAL [\old(c)=0, \read(*list)={1:0}, c=1, length=1, list={3:0}, next={0:0}] [L552] free(list) VAL [\old(c)=0, \read(*list)={1:0}, c=1, length=1, list={3:0}, next={0:0}] [L552] free(list) VAL [\old(c)=0, \read(*list)={1:0}, c=1, length=1, list={3:0}, next={0:0}] [L552] free(list) [L553] list = next VAL [\old(c)=0, c=1, length=1, list={3:0}, next={0:0}] [L554] length-- VAL [\old(c)=0, c=1, length=0, list={3:0}, next={0:0}] [L556] COND FALSE !(length > 0) VAL [\old(c)=0, c=1, length=0, list={3:0}, next={0:0}] [L562] return 0; [L541] struct item *list = ((void *)0); [L562] return 0; VAL [\old(c)=0, \result=0, c=1, length=0, next={0:0}] - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 559]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 559]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 117 locations, 44 error locations. Started 1 CEGAR loops. OverallTime: 9775.58ms, OverallIterations: 18, TraceHistogramMax: 2, EmptinessCheckTime: 33.28ms, AutomataDifference: 4594.46ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 11.29ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 795 SdHoareTripleChecker+Valid, 3362.25ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 791 mSDsluCounter, 374 SdHoareTripleChecker+Invalid, 2736.17ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 280 IncrementalHoareTripleChecker+Unchecked, 2669 mSDsCounter, 148 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6735 IncrementalHoareTripleChecker+Invalid, 7163 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 148 mSolverCounterUnsat, 85 mSDtfsCounter, 6735 mSolverCounterSat, 47.99ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 307 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 2205.07ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=2, InterpolantAutomatonStates: 130, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 90.36ms AutomataMinimizationTime, 17 MinimizatonAttempts, 70 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 52.96ms SsaConstructionTime, 262.93ms SatisfiabilityAnalysisTime, 2827.22ms InterpolantComputationTime, 443 NumberOfCodeBlocks, 443 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 419 ConstructedInterpolants, 15 QuantifiedInterpolants, 4072 SizeOfPredicates, 24 NumberOfNonLiveVariables, 252 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 19 InterpolantComputations, 15 PerfectInterpolantSequences, 6/28 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-08-30 17:37:29,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-30 17:37:31,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 17:37:31,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 17:37:31,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 17:37:31,647 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 17:37:31,648 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 17:37:31,649 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 17:37:31,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 17:37:31,653 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 17:37:31,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 17:37:31,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 17:37:31,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 17:37:31,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 17:37:31,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 17:37:31,658 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 17:37:31,659 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 17:37:31,660 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 17:37:31,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 17:37:31,663 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 17:37:31,664 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 17:37:31,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 17:37:31,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 17:37:31,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 17:37:31,668 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 17:37:31,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 17:37:31,671 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 17:37:31,671 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 17:37:31,672 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 17:37:31,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 17:37:31,674 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 17:37:31,674 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 17:37:31,674 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 17:37:31,675 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 17:37:31,676 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 17:37:31,677 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 17:37:31,677 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 17:37:31,678 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 17:37:31,678 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 17:37:31,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 17:37:31,679 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 17:37:31,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 17:37:31,681 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-08-30 17:37:31,704 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 17:37:31,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 17:37:31,705 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 17:37:31,705 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 17:37:31,706 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 17:37:31,706 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 17:37:31,707 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 17:37:31,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 17:37:31,707 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 17:37:31,707 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 17:37:31,707 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 17:37:31,708 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 17:37:31,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 17:37:31,708 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 17:37:31,708 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 17:37:31,708 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-30 17:37:31,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 17:37:31,709 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 17:37:31,709 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-30 17:37:31,709 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-30 17:37:31,709 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 17:37:31,710 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 17:37:31,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 17:37:31,710 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 17:37:31,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 17:37:31,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 17:37:31,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 17:37:31,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 17:37:31,711 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-30 17:37:31,711 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-30 17:37:31,712 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 17:37:31,712 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-30 17:37:31,712 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86beb7e463e80bf4cd7303ba718fa4bc3c1db625 [2021-08-30 17:37:32,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 17:37:32,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 17:37:32,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 17:37:32,056 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 17:37:32,061 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 17:37:32,062 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/test-0232_1-1.i [2021-08-30 17:37:32,131 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0e8b8d6d/2cc875914e1745e88d6d723ef4233479/FLAG825003353 [2021-08-30 17:37:32,604 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 17:37:32,605 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/test-0232_1-1.i [2021-08-30 17:37:32,619 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0e8b8d6d/2cc875914e1745e88d6d723ef4233479/FLAG825003353 [2021-08-30 17:37:33,114 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0e8b8d6d/2cc875914e1745e88d6d723ef4233479 [2021-08-30 17:37:33,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 17:37:33,117 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 17:37:33,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 17:37:33,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 17:37:33,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 17:37:33,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:37:33" (1/1) ... [2021-08-30 17:37:33,126 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5585e1ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:37:33, skipping insertion in model container [2021-08-30 17:37:33,126 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:37:33" (1/1) ... [2021-08-30 17:37:33,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 17:37:33,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 17:37:33,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 17:37:33,413 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 17:37:33,472 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 17:37:33,500 INFO L208 MainTranslator]: Completed translation [2021-08-30 17:37:33,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:37:33 WrapperNode [2021-08-30 17:37:33,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 17:37:33,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 17:37:33,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 17:37:33,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 17:37:33,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:37:33" (1/1) ... [2021-08-30 17:37:33,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:37:33" (1/1) ... [2021-08-30 17:37:33,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:37:33" (1/1) ... [2021-08-30 17:37:33,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:37:33" (1/1) ... [2021-08-30 17:37:33,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:37:33" (1/1) ... [2021-08-30 17:37:33,576 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:37:33" (1/1) ... [2021-08-30 17:37:33,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:37:33" (1/1) ... [2021-08-30 17:37:33,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 17:37:33,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 17:37:33,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 17:37:33,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 17:37:33,585 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:37:33" (1/1) ... [2021-08-30 17:37:33,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 17:37:33,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:37:33,613 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) [2021-08-30 17:37:33,640 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 [2021-08-30 17:37:33,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 17:37:33,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 17:37:33,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-08-30 17:37:33,653 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-30 17:37:33,654 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-30 17:37:33,654 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-30 17:37:33,654 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-30 17:37:33,654 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-30 17:37:33,655 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-30 17:37:33,655 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-08-30 17:37:33,655 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 17:37:33,655 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-30 17:37:33,656 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-30 17:37:33,656 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-30 17:37:33,657 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-30 17:37:33,657 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-30 17:37:33,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 17:37:33,657 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-30 17:37:33,657 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-30 17:37:33,657 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-30 17:37:33,657 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-30 17:37:33,658 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-30 17:37:33,658 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-30 17:37:33,658 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-30 17:37:33,658 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-30 17:37:33,659 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-30 17:37:33,659 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-30 17:37:33,659 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-30 17:37:33,659 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-30 17:37:33,659 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-30 17:37:33,659 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-30 17:37:33,660 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-30 17:37:33,660 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-30 17:37:33,660 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-30 17:37:33,660 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-30 17:37:33,661 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-30 17:37:33,661 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-30 17:37:33,661 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-30 17:37:33,661 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-30 17:37:33,661 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-30 17:37:33,661 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-30 17:37:33,662 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-30 17:37:33,662 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-30 17:37:33,662 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-30 17:37:33,662 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-30 17:37:33,662 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-30 17:37:33,663 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-30 17:37:33,663 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-30 17:37:33,663 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-30 17:37:33,664 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-30 17:37:33,664 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-30 17:37:33,664 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-30 17:37:33,664 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-30 17:37:33,664 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-30 17:37:33,665 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-30 17:37:33,665 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-30 17:37:33,665 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-30 17:37:33,665 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-30 17:37:33,665 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-30 17:37:33,665 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-30 17:37:33,665 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-30 17:37:33,666 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-30 17:37:33,666 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-30 17:37:33,666 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-30 17:37:33,667 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-30 17:37:33,667 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-30 17:37:33,667 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-30 17:37:33,668 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-30 17:37:33,668 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-30 17:37:33,668 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-30 17:37:33,668 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-30 17:37:33,669 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-30 17:37:33,669 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-30 17:37:33,669 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-30 17:37:33,669 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-30 17:37:33,669 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-30 17:37:33,669 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-30 17:37:33,669 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-30 17:37:33,670 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-30 17:37:33,670 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-30 17:37:33,670 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-30 17:37:33,670 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-30 17:37:33,670 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-30 17:37:33,670 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-30 17:37:33,670 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-30 17:37:33,671 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-30 17:37:33,671 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-30 17:37:33,671 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-30 17:37:33,671 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-30 17:37:33,671 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-30 17:37:33,671 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-30 17:37:33,682 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-30 17:37:33,682 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-30 17:37:33,682 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-30 17:37:33,683 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-30 17:37:33,683 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-30 17:37:33,683 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-30 17:37:33,683 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-30 17:37:33,683 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-30 17:37:33,683 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-30 17:37:33,684 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-30 17:37:33,684 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-30 17:37:33,684 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-30 17:37:33,684 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-30 17:37:33,685 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-30 17:37:33,685 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-30 17:37:33,685 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-30 17:37:33,685 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-30 17:37:33,686 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-30 17:37:33,686 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-30 17:37:33,686 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-30 17:37:33,686 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-30 17:37:33,686 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-30 17:37:33,687 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-30 17:37:33,687 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-30 17:37:33,687 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-30 17:37:33,687 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-30 17:37:33,687 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-30 17:37:33,687 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-30 17:37:33,688 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-30 17:37:33,688 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-30 17:37:33,688 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-30 17:37:33,688 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-30 17:37:33,688 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-30 17:37:33,689 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-08-30 17:37:33,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-30 17:37:33,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-30 17:37:33,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-30 17:37:33,692 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 17:37:33,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-08-30 17:37:33,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 17:37:33,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 17:37:33,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-30 17:37:33,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 17:37:33,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-08-30 17:37:33,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-08-30 17:37:33,700 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-08-30 17:37:34,147 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 17:37:34,147 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-30 17:37:34,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:37:34 BoogieIcfgContainer [2021-08-30 17:37:34,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 17:37:34,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 17:37:34,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 17:37:34,154 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 17:37:34,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:37:33" (1/3) ... [2021-08-30 17:37:34,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ae3b1fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:37:34, skipping insertion in model container [2021-08-30 17:37:34,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:37:33" (2/3) ... [2021-08-30 17:37:34,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ae3b1fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:37:34, skipping insertion in model container [2021-08-30 17:37:34,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:37:34" (3/3) ... [2021-08-30 17:37:34,157 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0232_1-1.i [2021-08-30 17:37:34,169 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 17:37:34,170 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2021-08-30 17:37:34,211 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 17:37:34,218 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, mConcurrency=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 [2021-08-30 17:37:34,219 INFO L340 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2021-08-30 17:37:34,236 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 91 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:37:34,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-30 17:37:34,252 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:34,252 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:34,253 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting appendErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:34,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:34,257 INFO L82 PathProgramCache]: Analyzing trace with hash -784082766, now seen corresponding path program 1 times [2021-08-30 17:37:34,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:37:34,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207521383] [2021-08-30 17:37:34,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:34,268 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:37:34,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:37:34,274 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 17:37:34,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-30 17:37:34,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:34,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-30 17:37:34,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:37:34,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 17:37:34,645 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-08-30 17:37:34,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-08-30 17:37:34,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:34,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:37:34,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:34,738 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:37:34,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207521383] [2021-08-30 17:37:34,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207521383] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:37:34,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:37:34,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-08-30 17:37:34,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076826672] [2021-08-30 17:37:34,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:37:34,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:37:34,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:37:34,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:37:34,790 INFO L87 Difference]: Start difference. First operand has 98 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 91 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:37:35,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:35,246 INFO L93 Difference]: Finished difference Result 103 states and 110 transitions. [2021-08-30 17:37:35,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 17:37:35,249 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-08-30 17:37:35,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:35,257 INFO L225 Difference]: With dead ends: 103 [2021-08-30 17:37:35,257 INFO L226 Difference]: Without dead ends: 100 [2021-08-30 17:37:35,258 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.50ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-30 17:37:35,262 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 36 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 329.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.50ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 397.23ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:35,262 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 19 Invalid, 365 Unknown, 0 Unchecked, 5.50ms Time], IncrementalHoareTripleChecker [10 Valid, 353 Invalid, 0 Unknown, 2 Unchecked, 397.23ms Time] [2021-08-30 17:37:35,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-30 17:37:35,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2021-08-30 17:37:35,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 50 states have (on average 1.98) internal successors, (99), 91 states have internal predecessors, (99), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:37:35,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2021-08-30 17:37:35,299 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 9 [2021-08-30 17:37:35,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:35,300 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2021-08-30 17:37:35,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:37:35,301 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2021-08-30 17:37:35,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-30 17:37:35,302 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:35,303 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:35,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-30 17:37:35,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 17:37:35,512 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting appendErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:35,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:35,513 INFO L82 PathProgramCache]: Analyzing trace with hash -784082765, now seen corresponding path program 1 times [2021-08-30 17:37:35,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:37:35,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925264113] [2021-08-30 17:37:35,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:35,514 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:37:35,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:37:35,517 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 17:37:35,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-30 17:37:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:35,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-30 17:37:35,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:37:35,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 17:37:35,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 17:37:35,761 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 17:37:35,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-08-30 17:37:35,767 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-30 17:37:35,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-08-30 17:37:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:35,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:37:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:36,101 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:37:36,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925264113] [2021-08-30 17:37:36,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1925264113] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:37:36,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:37:36,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-08-30 17:37:36,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923812239] [2021-08-30 17:37:36,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 17:37:36,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:37:36,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 17:37:36,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:37:36,104 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:37:36,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:36,603 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2021-08-30 17:37:36,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 17:37:36,605 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-08-30 17:37:36,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:36,605 INFO L225 Difference]: With dead ends: 98 [2021-08-30 17:37:36,605 INFO L226 Difference]: Without dead ends: 98 [2021-08-30 17:37:36,606 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 197.70ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:37:36,606 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 414.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.60ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 282 IncrementalHoareTripleChecker+Unchecked, 485.63ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:36,607 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 559 Unknown, 0 Unchecked, 2.60ms Time], IncrementalHoareTripleChecker [1 Valid, 276 Invalid, 0 Unknown, 282 Unchecked, 485.63ms Time] [2021-08-30 17:37:36,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-30 17:37:36,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-08-30 17:37:36,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 50 states have (on average 1.96) internal successors, (98), 91 states have internal predecessors, (98), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:37:36,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2021-08-30 17:37:36,612 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 9 [2021-08-30 17:37:36,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:36,612 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2021-08-30 17:37:36,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:37:36,612 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2021-08-30 17:37:36,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 17:37:36,612 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:36,612 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:36,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-30 17:37:36,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 17:37:36,813 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:36,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:36,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1463238141, now seen corresponding path program 1 times [2021-08-30 17:37:36,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:37:36,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245530408] [2021-08-30 17:37:36,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:36,814 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:37:36,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:37:36,815 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 17:37:36,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-30 17:37:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:36,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-30 17:37:36,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:37:36,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 17:37:36,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:36,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:37:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:36,972 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:37:36,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245530408] [2021-08-30 17:37:36,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245530408] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:37:36,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:37:36,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-30 17:37:36,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699317277] [2021-08-30 17:37:36,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-30 17:37:36,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:37:36,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-30 17:37:36,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-30 17:37:36,974 INFO L87 Difference]: Start difference. First operand 98 states and 105 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:37:37,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:37,174 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2021-08-30 17:37:37,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-30 17:37:37,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-30 17:37:37,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:37,176 INFO L225 Difference]: With dead ends: 94 [2021-08-30 17:37:37,176 INFO L226 Difference]: Without dead ends: 94 [2021-08-30 17:37:37,176 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.31ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-30 17:37:37,177 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 159.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.75ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 193.44ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:37,177 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 9 Invalid, 157 Unknown, 0 Unchecked, 0.75ms Time], IncrementalHoareTripleChecker [4 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 193.44ms Time] [2021-08-30 17:37:37,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-08-30 17:37:37,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-08-30 17:37:37,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 50 states have (on average 1.88) internal successors, (94), 87 states have internal predecessors, (94), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:37:37,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2021-08-30 17:37:37,186 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 10 [2021-08-30 17:37:37,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:37,186 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2021-08-30 17:37:37,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:37:37,186 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2021-08-30 17:37:37,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 17:37:37,186 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:37,187 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:37,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-08-30 17:37:37,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 17:37:37,395 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:37,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:37,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1463238142, now seen corresponding path program 1 times [2021-08-30 17:37:37,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:37:37,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348933804] [2021-08-30 17:37:37,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:37,396 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:37:37,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:37:37,397 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 17:37:37,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-08-30 17:37:37,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:37,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-30 17:37:37,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:37:37,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 17:37:37,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:37,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:37:37,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:37,606 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:37:37,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348933804] [2021-08-30 17:37:37,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348933804] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:37:37,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:37:37,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-08-30 17:37:37,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231231423] [2021-08-30 17:37:37,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 17:37:37,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:37:37,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 17:37:37,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:37:37,607 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:37:37,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:37,917 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2021-08-30 17:37:37,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-30 17:37:37,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-30 17:37:37,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:37,918 INFO L225 Difference]: With dead ends: 90 [2021-08-30 17:37:37,919 INFO L226 Difference]: Without dead ends: 90 [2021-08-30 17:37:37,919 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.04ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:37:37,920 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 262.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.91ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 303.68ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:37,920 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 13 Invalid, 218 Unknown, 0 Unchecked, 0.91ms Time], IncrementalHoareTripleChecker [4 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 303.68ms Time] [2021-08-30 17:37:37,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-30 17:37:37,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-08-30 17:37:37,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 50 states have (on average 1.8) internal successors, (90), 83 states have internal predecessors, (90), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:37:37,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2021-08-30 17:37:37,926 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 10 [2021-08-30 17:37:37,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:37,926 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2021-08-30 17:37:37,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:37:37,926 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2021-08-30 17:37:37,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-30 17:37:37,927 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:37,927 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:37,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-08-30 17:37:38,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 17:37:38,133 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:38,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:38,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1627228125, now seen corresponding path program 1 times [2021-08-30 17:37:38,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:37:38,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494351794] [2021-08-30 17:37:38,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:38,134 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:37:38,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:37:38,140 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 17:37:38,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-08-30 17:37:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:38,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-30 17:37:38,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:37:38,384 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-30 17:37:38,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 40 [2021-08-30 17:37:38,407 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-30 17:37:38,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2021-08-30 17:37:38,477 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 29 treesize of output 21 [2021-08-30 17:37:38,480 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 18 treesize of output 10 [2021-08-30 17:37:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:38,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:37:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:38,581 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:37:38,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494351794] [2021-08-30 17:37:38,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494351794] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:37:38,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:37:38,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 9 [2021-08-30 17:37:38,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14656250] [2021-08-30 17:37:38,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 17:37:38,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:37:38,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 17:37:38,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:37:38,582 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:37:39,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:39,203 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2021-08-30 17:37:39,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 17:37:39,203 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-08-30 17:37:39,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:39,204 INFO L225 Difference]: With dead ends: 101 [2021-08-30 17:37:39,204 INFO L226 Difference]: Without dead ends: 101 [2021-08-30 17:37:39,204 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 145.37ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-30 17:37:39,205 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 465.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.76ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 553.19ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:39,205 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 42 Invalid, 672 Unknown, 0 Unchecked, 2.76ms Time], IncrementalHoareTripleChecker [3 Valid, 584 Invalid, 0 Unknown, 85 Unchecked, 553.19ms Time] [2021-08-30 17:37:39,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-08-30 17:37:39,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2021-08-30 17:37:39,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 54 states have (on average 1.7407407407407407) internal successors, (94), 87 states have internal predecessors, (94), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:37:39,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2021-08-30 17:37:39,211 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 15 [2021-08-30 17:37:39,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:39,211 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2021-08-30 17:37:39,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:37:39,211 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2021-08-30 17:37:39,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-30 17:37:39,212 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:39,212 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:39,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-08-30 17:37:39,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 17:37:39,422 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:39,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:39,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1095257503, now seen corresponding path program 1 times [2021-08-30 17:37:39,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:37:39,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499371966] [2021-08-30 17:37:39,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:39,424 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:37:39,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:37:39,425 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 17:37:39,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-08-30 17:37:39,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:39,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-30 17:37:39,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:37:39,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 17:37:39,612 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-08-30 17:37:39,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-08-30 17:37:39,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:39,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:37:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:41,831 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:37:41,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [499371966] [2021-08-30 17:37:41,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [499371966] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:37:41,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:37:41,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 5 [2021-08-30 17:37:41,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145888164] [2021-08-30 17:37:41,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:37:41,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:37:41,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:37:41,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=14, Unknown=1, NotChecked=0, Total=30 [2021-08-30 17:37:41,832 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:37:41,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:41,981 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2021-08-30 17:37:41,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 17:37:41,982 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-08-30 17:37:41,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:41,983 INFO L225 Difference]: With dead ends: 96 [2021-08-30 17:37:41,983 INFO L226 Difference]: Without dead ends: 96 [2021-08-30 17:37:41,983 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2057.11ms TimeCoverageRelationStatistics Valid=15, Invalid=14, Unknown=1, NotChecked=0, Total=30 [2021-08-30 17:37:41,984 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 126.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.56ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 145.07ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:41,984 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 15 Invalid, 159 Unknown, 0 Unchecked, 0.56ms Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 83 Unchecked, 145.07ms Time] [2021-08-30 17:37:41,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-08-30 17:37:41,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2021-08-30 17:37:41,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 54 states have (on average 1.7222222222222223) internal successors, (93), 86 states have internal predecessors, (93), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:37:41,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2021-08-30 17:37:41,990 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 16 [2021-08-30 17:37:41,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:41,990 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2021-08-30 17:37:41,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:37:41,990 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2021-08-30 17:37:41,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-30 17:37:41,993 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:41,993 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:42,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-08-30 17:37:42,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 17:37:42,194 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:42,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:42,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1095257502, now seen corresponding path program 1 times [2021-08-30 17:37:42,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:37:42,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1937807207] [2021-08-30 17:37:42,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:42,195 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:37:42,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:37:42,195 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 17:37:42,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-08-30 17:37:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:42,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-30 17:37:42,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:37:42,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 17:37:42,486 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-08-30 17:37:42,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 37 [2021-08-30 17:37:42,495 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 17:37:42,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-08-30 17:37:42,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:42,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:37:45,003 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-30 17:37:45,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2021-08-30 17:37:45,120 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 22 [2021-08-30 17:37:45,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:45,236 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:37:45,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1937807207] [2021-08-30 17:37:45,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1937807207] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:37:45,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:37:45,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-08-30 17:37:45,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070929462] [2021-08-30 17:37:45,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-30 17:37:45,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:37:45,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-30 17:37:45,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=98, Unknown=1, NotChecked=0, Total=132 [2021-08-30 17:37:45,237 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:37:45,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:45,608 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2021-08-30 17:37:45,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:37:45,609 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-08-30 17:37:45,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:45,610 INFO L225 Difference]: With dead ends: 96 [2021-08-30 17:37:45,610 INFO L226 Difference]: Without dead ends: 96 [2021-08-30 17:37:45,611 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 2423.69ms TimeCoverageRelationStatistics Valid=39, Invalid=116, Unknown=1, NotChecked=0, Total=156 [2021-08-30 17:37:45,611 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 120 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 307.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.78ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 340.60ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:45,611 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 28 Invalid, 240 Unknown, 0 Unchecked, 1.78ms Time], IncrementalHoareTripleChecker [1 Valid, 155 Invalid, 0 Unknown, 84 Unchecked, 340.60ms Time] [2021-08-30 17:37:45,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-08-30 17:37:45,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-08-30 17:37:45,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 89 states have internal predecessors, (96), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:37:45,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2021-08-30 17:37:45,616 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 16 [2021-08-30 17:37:45,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:45,616 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2021-08-30 17:37:45,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:37:45,617 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2021-08-30 17:37:45,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-30 17:37:45,617 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:45,617 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:45,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-08-30 17:37:45,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 17:37:45,827 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:45,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:45,827 INFO L82 PathProgramCache]: Analyzing trace with hash -157034909, now seen corresponding path program 1 times [2021-08-30 17:37:45,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:37:45,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528762698] [2021-08-30 17:37:45,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:45,828 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:37:45,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:37:45,829 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 17:37:45,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-08-30 17:37:45,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:45,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-30 17:37:45,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:37:45,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 17:37:46,086 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-08-30 17:37:46,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2021-08-30 17:37:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:46,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:37:46,253 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-30 17:37:46,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-08-30 17:37:46,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:46,294 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:37:46,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528762698] [2021-08-30 17:37:46,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528762698] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:37:46,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 17:37:46,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-30 17:37:46,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616399143] [2021-08-30 17:37:46,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 17:37:46,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:37:46,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 17:37:46,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:37:46,296 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:37:46,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:46,637 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2021-08-30 17:37:46,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 17:37:46,638 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-08-30 17:37:46,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:46,638 INFO L225 Difference]: With dead ends: 95 [2021-08-30 17:37:46,639 INFO L226 Difference]: Without dead ends: 95 [2021-08-30 17:37:46,639 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 111.95ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-30 17:37:46,639 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 115 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 266.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.58ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 303.79ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:46,640 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 13 Invalid, 256 Unknown, 0 Unchecked, 1.58ms Time], IncrementalHoareTripleChecker [12 Valid, 178 Invalid, 0 Unknown, 66 Unchecked, 303.79ms Time] [2021-08-30 17:37:46,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-08-30 17:37:46,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2021-08-30 17:37:46,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 56 states have (on average 1.625) internal successors, (91), 85 states have internal predecessors, (91), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:37:46,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2021-08-30 17:37:46,644 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 23 [2021-08-30 17:37:46,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:46,645 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2021-08-30 17:37:46,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:37:46,645 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2021-08-30 17:37:46,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-30 17:37:46,645 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:46,646 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:46,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-08-30 17:37:46,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 17:37:46,859 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:46,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:46,860 INFO L82 PathProgramCache]: Analyzing trace with hash -157034908, now seen corresponding path program 1 times [2021-08-30 17:37:46,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:37:46,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1274200508] [2021-08-30 17:37:46,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:46,860 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:37:46,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:37:46,861 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 17:37:46,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-08-30 17:37:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:47,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-30 17:37:47,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:37:47,248 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 17:37:47,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-08-30 17:37:47,261 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 17:37:47,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-08-30 17:37:47,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:47,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:37:49,888 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 55 treesize of output 51 [2021-08-30 17:37:49,904 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-30 17:37:49,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 50 [2021-08-30 17:37:50,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 17:37:50,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 50 [2021-08-30 17:37:50,199 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-30 17:37:50,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 49 [2021-08-30 17:37:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:50,543 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:37:50,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1274200508] [2021-08-30 17:37:50,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1274200508] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:37:50,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 17:37:50,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-30 17:37:50,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609186885] [2021-08-30 17:37:50,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-30 17:37:50,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:37:50,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-30 17:37:50,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-30 17:37:50,546 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand has 14 states, 11 states have (on average 2.909090909090909) internal successors, (32), 12 states have internal predecessors, (32), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:37:51,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:51,489 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2021-08-30 17:37:51,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 17:37:51,490 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.909090909090909) internal successors, (32), 12 states have internal predecessors, (32), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2021-08-30 17:37:51,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:51,491 INFO L225 Difference]: With dead ends: 87 [2021-08-30 17:37:51,491 INFO L226 Difference]: Without dead ends: 87 [2021-08-30 17:37:51,491 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 2802.21ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-08-30 17:37:51,492 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 111 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 669.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.11ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 751.02ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:51,492 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 27 Invalid, 456 Unknown, 0 Unchecked, 3.11ms Time], IncrementalHoareTripleChecker [14 Valid, 260 Invalid, 0 Unknown, 182 Unchecked, 751.02ms Time] [2021-08-30 17:37:51,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-08-30 17:37:51,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-08-30 17:37:51,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 56 states have (on average 1.5178571428571428) internal successors, (85), 80 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:37:51,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2021-08-30 17:37:51,496 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 23 [2021-08-30 17:37:51,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:51,496 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2021-08-30 17:37:51,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.909090909090909) internal successors, (32), 12 states have internal predecessors, (32), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:37:51,496 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2021-08-30 17:37:51,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-30 17:37:51,497 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:51,497 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:51,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-08-30 17:37:51,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 17:37:51,713 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:51,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:51,714 INFO L82 PathProgramCache]: Analyzing trace with hash -578453285, now seen corresponding path program 1 times [2021-08-30 17:37:51,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:37:51,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753247761] [2021-08-30 17:37:51,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:51,714 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:37:51,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:37:51,715 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 17:37:51,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-08-30 17:37:51,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:51,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 17:37:51,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:37:51,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-08-30 17:37:52,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-08-30 17:37:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:52,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:37:52,132 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 46 treesize of output 42 [2021-08-30 17:37:52,235 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-30 17:37:52,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 40 [2021-08-30 17:37:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:52,301 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:37:52,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753247761] [2021-08-30 17:37:52,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753247761] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:37:52,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:37:52,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-08-30 17:37:52,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746385417] [2021-08-30 17:37:52,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 17:37:52,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:37:52,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 17:37:52,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:37:52,303 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:37:53,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:53,024 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2021-08-30 17:37:53,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 17:37:53,024 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-08-30 17:37:53,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:53,025 INFO L225 Difference]: With dead ends: 111 [2021-08-30 17:37:53,025 INFO L226 Difference]: Without dead ends: 111 [2021-08-30 17:37:53,025 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 141.62ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-30 17:37:53,026 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 53 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 591.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.78ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 674.46ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:53,026 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 25 Invalid, 514 Unknown, 0 Unchecked, 2.78ms Time], IncrementalHoareTripleChecker [5 Valid, 424 Invalid, 0 Unknown, 85 Unchecked, 674.46ms Time] [2021-08-30 17:37:53,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-30 17:37:53,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2021-08-30 17:37:53,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 57 states have (on average 1.5263157894736843) internal successors, (87), 81 states have internal predecessors, (87), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:37:53,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2021-08-30 17:37:53,032 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 24 [2021-08-30 17:37:53,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:53,032 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2021-08-30 17:37:53,033 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:37:53,033 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2021-08-30 17:37:53,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-30 17:37:53,033 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:53,033 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:53,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-08-30 17:37:53,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 17:37:53,243 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:53,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:53,243 INFO L82 PathProgramCache]: Analyzing trace with hash -578453284, now seen corresponding path program 1 times [2021-08-30 17:37:53,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:37:53,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451339537] [2021-08-30 17:37:53,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:53,243 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:37:53,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:37:53,244 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 17:37:53,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-08-30 17:37:53,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:53,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-30 17:37:53,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:37:53,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-30 17:37:53,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 17:37:53,591 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 31 treesize of output 23 [2021-08-30 17:37:53,594 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 20 treesize of output 12 [2021-08-30 17:37:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:53,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:37:53,971 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 60 treesize of output 56 [2021-08-30 17:37:53,973 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 90 treesize of output 82 [2021-08-30 17:37:54,227 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 36 treesize of output 28 [2021-08-30 17:37:54,346 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 28 treesize of output 24 [2021-08-30 17:37:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:54,570 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:37:54,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451339537] [2021-08-30 17:37:54,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451339537] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:37:54,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:37:54,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-08-30 17:37:54,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103270454] [2021-08-30 17:37:54,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-30 17:37:54,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:37:54,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-30 17:37:54,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-30 17:37:54,572 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-30 17:37:55,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:55,895 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2021-08-30 17:37:55,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:37:55,896 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-08-30 17:37:55,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:55,897 INFO L225 Difference]: With dead ends: 104 [2021-08-30 17:37:55,897 INFO L226 Difference]: Without dead ends: 104 [2021-08-30 17:37:55,897 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 351.57ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-30 17:37:55,898 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 108 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1134.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.92ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1264.53ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:55,898 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 31 Invalid, 602 Unknown, 0 Unchecked, 2.92ms Time], IncrementalHoareTripleChecker [4 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 1264.53ms Time] [2021-08-30 17:37:55,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-30 17:37:55,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 87. [2021-08-30 17:37:55,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 57 states have (on average 1.4912280701754386) internal successors, (85), 80 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:37:55,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2021-08-30 17:37:55,908 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 24 [2021-08-30 17:37:55,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:55,909 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2021-08-30 17:37:55,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-30 17:37:55,911 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2021-08-30 17:37:55,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-30 17:37:55,915 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:55,915 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:55,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-08-30 17:37:56,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 17:37:56,116 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:56,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:56,117 INFO L82 PathProgramCache]: Analyzing trace with hash -578467219, now seen corresponding path program 1 times [2021-08-30 17:37:56,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:37:56,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [4472574] [2021-08-30 17:37:56,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:56,117 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:37:56,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:37:56,118 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 17:37:56,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-08-30 17:37:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:56,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-30 17:37:56,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:37:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:56,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:37:56,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:56,340 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:37:56,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [4472574] [2021-08-30 17:37:56,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [4472574] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:37:56,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:37:56,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-08-30 17:37:56,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005840297] [2021-08-30 17:37:56,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:37:56,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:37:56,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:37:56,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:37:56,342 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:37:56,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:56,721 INFO L93 Difference]: Finished difference Result 139 states and 150 transitions. [2021-08-30 17:37:56,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:37:56,721 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2021-08-30 17:37:56,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:56,723 INFO L225 Difference]: With dead ends: 139 [2021-08-30 17:37:56,723 INFO L226 Difference]: Without dead ends: 139 [2021-08-30 17:37:56,723 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.43ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-08-30 17:37:56,724 INFO L928 BasicCegarLoop]: 10 mSDtfsCounter, 155 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 309.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.56ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 359.02ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:56,724 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 22 Invalid, 247 Unknown, 0 Unchecked, 1.56ms Time], IncrementalHoareTripleChecker [21 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 359.02ms Time] [2021-08-30 17:37:56,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-08-30 17:37:56,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 93. [2021-08-30 17:37:56,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.4057971014492754) internal successors, (97), 83 states have internal predecessors, (97), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:37:56,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 108 transitions. [2021-08-30 17:37:56,728 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 108 transitions. Word has length 24 [2021-08-30 17:37:56,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:56,728 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 108 transitions. [2021-08-30 17:37:56,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:37:56,729 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 108 transitions. [2021-08-30 17:37:56,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-30 17:37:56,729 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:56,729 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:56,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-08-30 17:37:56,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 17:37:56,937 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr13ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:56,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:56,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1292973192, now seen corresponding path program 1 times [2021-08-30 17:37:56,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:37:56,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244603606] [2021-08-30 17:37:56,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:56,938 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:37:56,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:37:56,938 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 17:37:56,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-08-30 17:37:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:57,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 17:37:57,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:37:57,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 17:37:57,188 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 [2021-08-30 17:37:57,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:57,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:37:57,272 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 28 treesize of output 24 [2021-08-30 17:37:57,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:57,350 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:37:57,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244603606] [2021-08-30 17:37:57,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244603606] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:37:57,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:37:57,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-08-30 17:37:57,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465335567] [2021-08-30 17:37:57,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:37:57,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:37:57,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:37:57,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:37:57,351 INFO L87 Difference]: Start difference. First operand 93 states and 108 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:37:57,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:57,705 INFO L93 Difference]: Finished difference Result 110 states and 125 transitions. [2021-08-30 17:37:57,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:37:57,705 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2021-08-30 17:37:57,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:57,706 INFO L225 Difference]: With dead ends: 110 [2021-08-30 17:37:57,706 INFO L226 Difference]: Without dead ends: 110 [2021-08-30 17:37:57,706 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.13ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:37:57,707 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 41 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 284.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.12ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 330.38ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:57,707 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 17 Invalid, 333 Unknown, 0 Unchecked, 1.12ms Time], IncrementalHoareTripleChecker [2 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 330.38ms Time] [2021-08-30 17:37:57,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-08-30 17:37:57,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 92. [2021-08-30 17:37:57,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.3768115942028984) internal successors, (95), 82 states have internal predecessors, (95), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-30 17:37:57,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2021-08-30 17:37:57,710 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 27 [2021-08-30 17:37:57,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:57,710 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2021-08-30 17:37:57,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:37:57,711 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2021-08-30 17:37:57,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-30 17:37:57,711 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:57,711 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:57,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-08-30 17:37:57,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 17:37:57,921 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting appendErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:37:57,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:37:57,921 INFO L82 PathProgramCache]: Analyzing trace with hash -556090162, now seen corresponding path program 1 times [2021-08-30 17:37:57,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:37:57,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555800588] [2021-08-30 17:37:57,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:37:57,922 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:37:57,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:37:57,922 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 17:37:57,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-08-30 17:37:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:37:58,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-30 17:37:58,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:37:58,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 17:37:58,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-08-30 17:37:58,242 INFO L354 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2021-08-30 17:37:58,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2021-08-30 17:37:58,339 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-30 17:37:58,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2021-08-30 17:37:58,507 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-30 17:37:58,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 37 [2021-08-30 17:37:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:58,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:37:58,744 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 50 treesize of output 46 [2021-08-30 17:37:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:37:58,947 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:37:58,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555800588] [2021-08-30 17:37:58,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555800588] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:37:58,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 17:37:58,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-30 17:37:58,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290669259] [2021-08-30 17:37:58,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-30 17:37:58,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:37:58,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-30 17:37:58,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-30 17:37:58,948 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:37:59,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:37:59,825 INFO L93 Difference]: Finished difference Result 138 states and 165 transitions. [2021-08-30 17:37:59,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-30 17:37:59,825 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2021-08-30 17:37:59,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:37:59,829 INFO L225 Difference]: With dead ends: 138 [2021-08-30 17:37:59,829 INFO L226 Difference]: Without dead ends: 138 [2021-08-30 17:37:59,829 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 510.65ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-08-30 17:37:59,829 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 577.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.95ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 661.60ms IncrementalHoareTripleChecker+Time [2021-08-30 17:37:59,830 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 52 Invalid, 721 Unknown, 0 Unchecked, 2.95ms Time], IncrementalHoareTripleChecker [3 Valid, 455 Invalid, 0 Unknown, 263 Unchecked, 661.60ms Time] [2021-08-30 17:37:59,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-08-30 17:37:59,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 110. [2021-08-30 17:37:59,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 84 states have (on average 1.369047619047619) internal successors, (115), 96 states have internal predecessors, (115), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2021-08-30 17:37:59,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 135 transitions. [2021-08-30 17:37:59,833 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 135 transitions. Word has length 29 [2021-08-30 17:37:59,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:37:59,834 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 135 transitions. [2021-08-30 17:37:59,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:37:59,834 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 135 transitions. [2021-08-30 17:37:59,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-30 17:37:59,834 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:37:59,834 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:37:59,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-08-30 17:38:00,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 17:38:00,035 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting appendErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:38:00,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:00,036 INFO L82 PathProgramCache]: Analyzing trace with hash -556090161, now seen corresponding path program 1 times [2021-08-30 17:38:00,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:38:00,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1491915236] [2021-08-30 17:38:00,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:00,036 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:38:00,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:38:00,037 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 17:38:00,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-08-30 17:38:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:00,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-30 17:38:00,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:38:00,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 17:38:00,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-08-30 17:38:00,406 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-30 17:38:00,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-08-30 17:38:00,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-08-30 17:38:00,509 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-30 17:38:00,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-08-30 17:38:00,535 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-30 17:38:00,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 42 [2021-08-30 17:38:00,707 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-30 17:38:00,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 46 [2021-08-30 17:38:00,714 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-30 17:38:00,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-08-30 17:38:00,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:38:00,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:38:02,389 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 105 treesize of output 101 [2021-08-30 17:38:02,392 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 150 treesize of output 134 [2021-08-30 17:38:14,782 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 62 treesize of output 58 [2021-08-30 17:38:14,798 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-30 17:38:14,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 57 [2021-08-30 17:38:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:38:17,057 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:38:17,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1491915236] [2021-08-30 17:38:17,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1491915236] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:38:17,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-30 17:38:17,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-08-30 17:38:17,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79766810] [2021-08-30 17:38:17,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-30 17:38:17,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:38:17,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-30 17:38:17,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=259, Unknown=4, NotChecked=0, Total=306 [2021-08-30 17:38:17,059 INFO L87 Difference]: Start difference. First operand 110 states and 135 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 18 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-30 17:38:18,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:38:18,543 INFO L93 Difference]: Finished difference Result 137 states and 164 transitions. [2021-08-30 17:38:18,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-30 17:38:18,544 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 18 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2021-08-30 17:38:18,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:38:18,545 INFO L225 Difference]: With dead ends: 137 [2021-08-30 17:38:18,545 INFO L226 Difference]: Without dead ends: 137 [2021-08-30 17:38:18,546 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 15900.57ms TimeCoverageRelationStatistics Valid=85, Invalid=373, Unknown=4, NotChecked=0, Total=462 [2021-08-30 17:38:18,546 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 66 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1047.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.36ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 1177.13ms IncrementalHoareTripleChecker+Time [2021-08-30 17:38:18,547 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 54 Invalid, 884 Unknown, 0 Unchecked, 3.36ms Time], IncrementalHoareTripleChecker [4 Valid, 528 Invalid, 0 Unknown, 352 Unchecked, 1177.13ms Time] [2021-08-30 17:38:18,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-30 17:38:18,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 110. [2021-08-30 17:38:18,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 96 states have internal predecessors, (114), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2021-08-30 17:38:18,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 134 transitions. [2021-08-30 17:38:18,551 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 134 transitions. Word has length 29 [2021-08-30 17:38:18,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:38:18,551 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 134 transitions. [2021-08-30 17:38:18,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 18 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-30 17:38:18,552 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 134 transitions. [2021-08-30 17:38:18,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-30 17:38:18,552 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:38:18,552 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:38:18,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-08-30 17:38:18,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 17:38:18,762 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr14ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:38:18,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:18,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1427463172, now seen corresponding path program 1 times [2021-08-30 17:38:18,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:38:18,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833147078] [2021-08-30 17:38:18,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:18,764 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:38:18,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:38:18,765 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 17:38:18,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-08-30 17:38:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:18,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-30 17:38:18,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:38:19,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-30 17:38:19,112 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 23 treesize of output 11 [2021-08-30 17:38:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:38:19,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:38:19,358 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 28 treesize of output 24 [2021-08-30 17:38:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:38:19,532 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:38:19,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833147078] [2021-08-30 17:38:19,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833147078] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:38:19,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:38:19,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-08-30 17:38:19,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037467199] [2021-08-30 17:38:19,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-30 17:38:19,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:38:19,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-30 17:38:19,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-30 17:38:19,533 INFO L87 Difference]: Start difference. First operand 110 states and 134 transitions. Second operand has 11 states, 10 states have (on average 4.6) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-30 17:38:20,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:38:20,342 INFO L93 Difference]: Finished difference Result 127 states and 151 transitions. [2021-08-30 17:38:20,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-30 17:38:20,343 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.6) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-08-30 17:38:20,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:38:20,344 INFO L225 Difference]: With dead ends: 127 [2021-08-30 17:38:20,344 INFO L226 Difference]: Without dead ends: 127 [2021-08-30 17:38:20,344 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 220.84ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-08-30 17:38:20,344 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 100 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 633.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.75ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 731.80ms IncrementalHoareTripleChecker+Time [2021-08-30 17:38:20,345 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 6 Invalid, 498 Unknown, 0 Unchecked, 1.75ms Time], IncrementalHoareTripleChecker [9 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 731.80ms Time] [2021-08-30 17:38:20,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-08-30 17:38:20,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 109. [2021-08-30 17:38:20,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 84 states have (on average 1.3333333333333333) internal successors, (112), 95 states have internal predecessors, (112), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2021-08-30 17:38:20,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2021-08-30 17:38:20,349 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 28 [2021-08-30 17:38:20,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:38:20,349 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2021-08-30 17:38:20,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.6) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-30 17:38:20,349 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2021-08-30 17:38:20,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-30 17:38:20,350 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:38:20,350 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:38:20,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-08-30 17:38:20,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 17:38:20,551 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr15ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:38:20,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:20,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1301685254, now seen corresponding path program 1 times [2021-08-30 17:38:20,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:38:20,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558233283] [2021-08-30 17:38:20,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:20,552 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:38:20,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:38:20,552 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 17:38:20,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-08-30 17:38:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:20,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 17:38:20,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:38:20,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-08-30 17:38:20,863 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 25 treesize of output 17 [2021-08-30 17:38:20,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:38:20,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:38:21,033 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 46 treesize of output 42 [2021-08-30 17:38:21,118 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-30 17:38:21,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 42 [2021-08-30 17:38:21,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:38:21,174 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:38:21,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558233283] [2021-08-30 17:38:21,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558233283] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:38:21,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:38:21,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-08-30 17:38:21,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153202870] [2021-08-30 17:38:21,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 17:38:21,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:38:21,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 17:38:21,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:38:21,175 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:38:21,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:38:21,679 INFO L93 Difference]: Finished difference Result 123 states and 146 transitions. [2021-08-30 17:38:21,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 17:38:21,680 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2021-08-30 17:38:21,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:38:21,682 INFO L225 Difference]: With dead ends: 123 [2021-08-30 17:38:21,682 INFO L226 Difference]: Without dead ends: 123 [2021-08-30 17:38:21,682 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 138.25ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-30 17:38:21,683 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 44 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 405.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.29ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 460.76ms IncrementalHoareTripleChecker+Time [2021-08-30 17:38:21,683 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 22 Invalid, 414 Unknown, 0 Unchecked, 1.29ms Time], IncrementalHoareTripleChecker [3 Valid, 341 Invalid, 0 Unknown, 70 Unchecked, 460.76ms Time] [2021-08-30 17:38:21,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-08-30 17:38:21,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 108. [2021-08-30 17:38:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 84 states have (on average 1.3095238095238095) internal successors, (110), 94 states have internal predecessors, (110), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2021-08-30 17:38:21,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 130 transitions. [2021-08-30 17:38:21,690 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 130 transitions. Word has length 29 [2021-08-30 17:38:21,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:38:21,690 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 130 transitions. [2021-08-30 17:38:21,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-30 17:38:21,691 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 130 transitions. [2021-08-30 17:38:21,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-30 17:38:21,691 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:38:21,691 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:38:21,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-08-30 17:38:21,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 17:38:21,901 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:38:21,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:21,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1697537089, now seen corresponding path program 1 times [2021-08-30 17:38:21,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:38:21,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1230094719] [2021-08-30 17:38:21,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:21,901 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:38:21,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:38:21,902 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 17:38:21,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-08-30 17:38:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:22,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-30 17:38:22,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:38:22,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 17:38:22,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-30 17:38:22,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-08-30 17:38:22,264 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-30 17:38:22,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-08-30 17:38:22,352 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 16 treesize of output 8 [2021-08-30 17:38:22,407 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-08-30 17:38:22,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 27 [2021-08-30 17:38:22,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:38:22,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:38:22,680 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 52 treesize of output 48 [2021-08-30 17:38:22,770 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 30 treesize of output 26 [2021-08-30 17:38:22,891 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 19 treesize of output 17 [2021-08-30 17:38:23,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:38:23,010 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:38:23,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1230094719] [2021-08-30 17:38:23,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1230094719] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:38:23,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:38:23,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 13 [2021-08-30 17:38:23,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379749865] [2021-08-30 17:38:23,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-30 17:38:23,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:38:23,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-30 17:38:23,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-30 17:38:23,013 INFO L87 Difference]: Start difference. First operand 108 states and 130 transitions. Second operand has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-30 17:38:23,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:38:23,835 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2021-08-30 17:38:23,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-30 17:38:23,835 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-08-30 17:38:23,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:38:23,836 INFO L225 Difference]: With dead ends: 125 [2021-08-30 17:38:23,836 INFO L226 Difference]: Without dead ends: 125 [2021-08-30 17:38:23,837 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 407.67ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-08-30 17:38:23,837 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 65 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 582.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.89ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 669.52ms IncrementalHoareTripleChecker+Time [2021-08-30 17:38:23,837 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 15 Invalid, 573 Unknown, 0 Unchecked, 2.89ms Time], IncrementalHoareTripleChecker [17 Valid, 508 Invalid, 0 Unknown, 48 Unchecked, 669.52ms Time] [2021-08-30 17:38:23,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-08-30 17:38:23,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 107. [2021-08-30 17:38:23,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 84 states have (on average 1.2857142857142858) internal successors, (108), 93 states have internal predecessors, (108), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2021-08-30 17:38:23,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 128 transitions. [2021-08-30 17:38:23,841 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 128 transitions. Word has length 30 [2021-08-30 17:38:23,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:38:23,841 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 128 transitions. [2021-08-30 17:38:23,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-30 17:38:23,841 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 128 transitions. [2021-08-30 17:38:23,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-30 17:38:23,842 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:38:23,842 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:38:23,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-08-30 17:38:24,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 17:38:24,043 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:38:24,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:24,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1697537088, now seen corresponding path program 1 times [2021-08-30 17:38:24,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:38:24,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262083535] [2021-08-30 17:38:24,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:24,043 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:38:24,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:38:24,044 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 17:38:24,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-08-30 17:38:24,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:24,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-30 17:38:24,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:38:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:38:24,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:38:24,319 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 8 treesize of output 6 [2021-08-30 17:38:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:38:24,386 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:38:24,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262083535] [2021-08-30 17:38:24,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262083535] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:38:24,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:38:24,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-08-30 17:38:24,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741574344] [2021-08-30 17:38:24,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:38:24,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:38:24,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:38:24,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:38:24,388 INFO L87 Difference]: Start difference. First operand 107 states and 128 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:38:24,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:38:24,600 INFO L93 Difference]: Finished difference Result 109 states and 130 transitions. [2021-08-30 17:38:24,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 17:38:24,601 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2021-08-30 17:38:24,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:38:24,601 INFO L225 Difference]: With dead ends: 109 [2021-08-30 17:38:24,601 INFO L226 Difference]: Without dead ends: 109 [2021-08-30 17:38:24,602 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 36.32ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:38:24,602 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 41 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 183.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.62ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 208.62ms IncrementalHoareTripleChecker+Time [2021-08-30 17:38:24,602 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 13 Invalid, 120 Unknown, 0 Unchecked, 0.62ms Time], IncrementalHoareTripleChecker [3 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 208.62ms Time] [2021-08-30 17:38:24,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-30 17:38:24,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2021-08-30 17:38:24,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 84 states have (on average 1.25) internal successors, (105), 91 states have internal predecessors, (105), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2021-08-30 17:38:24,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 125 transitions. [2021-08-30 17:38:24,606 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 125 transitions. Word has length 30 [2021-08-30 17:38:24,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:38:24,607 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 125 transitions. [2021-08-30 17:38:24,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:38:24,607 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 125 transitions. [2021-08-30 17:38:24,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-30 17:38:24,607 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:38:24,607 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:38:24,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-08-30 17:38:24,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 17:38:24,817 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting appendErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:38:24,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:24,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1185897844, now seen corresponding path program 1 times [2021-08-30 17:38:24,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:38:24,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878525942] [2021-08-30 17:38:24,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:24,817 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:38:24,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:38:24,818 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 17:38:24,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-08-30 17:38:24,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:38:24,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-30 17:38:24,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:38:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:38:25,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:38:25,264 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 8 treesize of output 6 [2021-08-30 17:38:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:38:25,366 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 17:38:25,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878525942] [2021-08-30 17:38:25,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1878525942] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 17:38:25,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:38:25,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-08-30 17:38:25,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625629880] [2021-08-30 17:38:25,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-30 17:38:25,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 17:38:25,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-30 17:38:25,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-30 17:38:25,368 INFO L87 Difference]: Start difference. First operand 105 states and 125 transitions. Second operand has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:38:25,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:38:25,835 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2021-08-30 17:38:25,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 17:38:25,845 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2021-08-30 17:38:25,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:38:25,846 INFO L225 Difference]: With dead ends: 104 [2021-08-30 17:38:25,846 INFO L226 Difference]: Without dead ends: 104 [2021-08-30 17:38:25,846 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 137.25ms TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-30 17:38:25,847 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 103 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 393.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.14ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 440.43ms IncrementalHoareTripleChecker+Time [2021-08-30 17:38:25,847 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 22 Invalid, 230 Unknown, 0 Unchecked, 1.14ms Time], IncrementalHoareTripleChecker [3 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 440.43ms Time] [2021-08-30 17:38:25,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-30 17:38:25,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-08-30 17:38:25,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 84 states have (on average 1.2380952380952381) internal successors, (104), 90 states have internal predecessors, (104), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2021-08-30 17:38:25,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2021-08-30 17:38:25,851 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 33 [2021-08-30 17:38:25,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:38:25,851 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2021-08-30 17:38:25,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 17:38:25,852 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2021-08-30 17:38:25,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-30 17:38:25,852 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:38:25,852 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:38:25,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-08-30 17:38:26,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 17:38:26,062 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr29ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 39 more)] === [2021-08-30 17:38:26,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:38:26,062 INFO L82 PathProgramCache]: Analyzing trace with hash -840371735, now seen corresponding path program 1 times [2021-08-30 17:38:26,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 17:38:26,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605899319] [2021-08-30 17:38:26,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:38:26,063 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 17:38:26,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 17:38:26,063 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-30 17:38:26,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-08-30 17:38:26,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 17:38:26,187 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-30 17:38:26,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 17:38:26,301 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-08-30 17:38:26,301 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-30 17:38:26,302 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr29ENSURES_VIOLATIONMEMORY_LEAK (43 of 44 remaining) [2021-08-30 17:38:26,303 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION (42 of 44 remaining) [2021-08-30 17:38:26,304 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION (41 of 44 remaining) [2021-08-30 17:38:26,304 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION (40 of 44 remaining) [2021-08-30 17:38:26,304 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION (39 of 44 remaining) [2021-08-30 17:38:26,304 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE (38 of 44 remaining) [2021-08-30 17:38:26,304 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5ASSERT_VIOLATIONMEMORY_FREE (37 of 44 remaining) [2021-08-30 17:38:26,304 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_FREE (36 of 44 remaining) [2021-08-30 17:38:26,305 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION (35 of 44 remaining) [2021-08-30 17:38:26,305 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION (34 of 44 remaining) [2021-08-30 17:38:26,305 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION (33 of 44 remaining) [2021-08-30 17:38:26,305 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION (32 of 44 remaining) [2021-08-30 17:38:26,305 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION (31 of 44 remaining) [2021-08-30 17:38:26,305 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION (30 of 44 remaining) [2021-08-30 17:38:26,305 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13ASSERT_VIOLATIONMEMORY_FREE (29 of 44 remaining) [2021-08-30 17:38:26,306 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14ASSERT_VIOLATIONMEMORY_FREE (28 of 44 remaining) [2021-08-30 17:38:26,306 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15ASSERT_VIOLATIONMEMORY_FREE (27 of 44 remaining) [2021-08-30 17:38:26,306 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION (26 of 44 remaining) [2021-08-30 17:38:26,306 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION (25 of 44 remaining) [2021-08-30 17:38:26,306 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION (24 of 44 remaining) [2021-08-30 17:38:26,306 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION (23 of 44 remaining) [2021-08-30 17:38:26,306 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION (22 of 44 remaining) [2021-08-30 17:38:26,307 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION (21 of 44 remaining) [2021-08-30 17:38:26,307 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION (20 of 44 remaining) [2021-08-30 17:38:26,307 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION (19 of 44 remaining) [2021-08-30 17:38:26,307 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24ASSERT_VIOLATIONMEMORY_FREE (18 of 44 remaining) [2021-08-30 17:38:26,307 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25ASSERT_VIOLATIONMEMORY_FREE (17 of 44 remaining) [2021-08-30 17:38:26,307 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26ASSERT_VIOLATIONMEMORY_FREE (16 of 44 remaining) [2021-08-30 17:38:26,307 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION (15 of 44 remaining) [2021-08-30 17:38:26,308 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION (14 of 44 remaining) [2021-08-30 17:38:26,308 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr0REQUIRES_VIOLATION (13 of 44 remaining) [2021-08-30 17:38:26,308 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr1REQUIRES_VIOLATION (12 of 44 remaining) [2021-08-30 17:38:26,308 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr2REQUIRES_VIOLATION (11 of 44 remaining) [2021-08-30 17:38:26,308 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr3REQUIRES_VIOLATION (10 of 44 remaining) [2021-08-30 17:38:26,308 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr4REQUIRES_VIOLATION (9 of 44 remaining) [2021-08-30 17:38:26,308 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr5REQUIRES_VIOLATION (8 of 44 remaining) [2021-08-30 17:38:26,309 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr6REQUIRES_VIOLATION (7 of 44 remaining) [2021-08-30 17:38:26,309 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr7REQUIRES_VIOLATION (6 of 44 remaining) [2021-08-30 17:38:26,309 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr8REQUIRES_VIOLATION (5 of 44 remaining) [2021-08-30 17:38:26,309 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr9REQUIRES_VIOLATION (4 of 44 remaining) [2021-08-30 17:38:26,309 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr10REQUIRES_VIOLATION (3 of 44 remaining) [2021-08-30 17:38:26,309 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr11REQUIRES_VIOLATION (2 of 44 remaining) [2021-08-30 17:38:26,309 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr12REQUIRES_VIOLATION (1 of 44 remaining) [2021-08-30 17:38:26,309 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr13REQUIRES_VIOLATION (0 of 44 remaining) [2021-08-30 17:38:26,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-08-30 17:38:26,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-30 17:38:26,525 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 17:38:26,535 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-08-30 17:38:26,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 05:38:26 BoogieIcfgContainer [2021-08-30 17:38:26,563 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 17:38:26,564 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 17:38:26,564 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 17:38:26,564 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 17:38:26,565 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:37:34" (3/4) ... [2021-08-30 17:38:26,567 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-30 17:38:26,567 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 17:38:26,570 INFO L158 Benchmark]: Toolchain (without parser) took 53451.03ms. Allocated memory was 52.4MB in the beginning and 75.5MB in the end (delta: 23.1MB). Free memory was 28.4MB in the beginning and 44.8MB in the end (delta: -16.5MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. [2021-08-30 17:38:26,571 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 52.4MB. Free memory was 34.7MB in the beginning and 34.7MB in the end (delta: 36.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 17:38:26,571 INFO L158 Benchmark]: CACSL2BoogieTranslator took 381.92ms. Allocated memory was 52.4MB in the beginning and 62.9MB in the end (delta: 10.5MB). Free memory was 28.2MB in the beginning and 39.7MB in the end (delta: -11.5MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. [2021-08-30 17:38:26,572 INFO L158 Benchmark]: Boogie Preprocessor took 80.30ms. Allocated memory is still 62.9MB. Free memory was 39.7MB in the beginning and 36.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 17:38:26,572 INFO L158 Benchmark]: RCFGBuilder took 564.92ms. Allocated memory is still 62.9MB. Free memory was 36.6MB in the beginning and 28.5MB in the end (delta: 8.1MB). Peak memory consumption was 13.1MB. Max. memory is 16.1GB. [2021-08-30 17:38:26,572 INFO L158 Benchmark]: TraceAbstraction took 52411.40ms. Allocated memory was 62.9MB in the beginning and 75.5MB in the end (delta: 12.6MB). Free memory was 27.8MB in the beginning and 44.8MB in the end (delta: -17.0MB). Peak memory consumption was 22.0MB. Max. memory is 16.1GB. [2021-08-30 17:38:26,572 INFO L158 Benchmark]: Witness Printer took 3.18ms. Allocated memory is still 75.5MB. Free memory is still 44.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 17:38:26,577 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 52.4MB. Free memory was 34.7MB in the beginning and 34.7MB in the end (delta: 36.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 381.92ms. Allocated memory was 52.4MB in the beginning and 62.9MB in the end (delta: 10.5MB). Free memory was 28.2MB in the beginning and 39.7MB in the end (delta: -11.5MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 80.30ms. Allocated memory is still 62.9MB. Free memory was 39.7MB in the beginning and 36.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 564.92ms. Allocated memory is still 62.9MB. Free memory was 36.6MB in the beginning and 28.5MB in the end (delta: 8.1MB). Peak memory consumption was 13.1MB. Max. memory is 16.1GB. * TraceAbstraction took 52411.40ms. Allocated memory was 62.9MB in the beginning and 75.5MB in the end (delta: 12.6MB). Free memory was 27.8MB in the beginning and 44.8MB in the end (delta: -17.0MB). Peak memory consumption was 22.0MB. Max. memory is 16.1GB. * Witness Printer took 3.18ms. Allocated memory is still 75.5MB. Free memory is still 44.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 539]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 539. Possible FailurePath: [L524] int c = 0; VAL [\old(c)=13, c=0] [L541] struct item *list = ((void *)0); [L542] int length = 0; VAL [\old(c)=0, c=0, length=0, list={31:0}] [L544] CALL append(&list) VAL [\old(c)=0, c=0, plist={31:0}] [L531] c++ [L532] struct item *item = malloc(sizeof *item); [L533] EXPR \read(**plist) VAL [\old(c)=0, \read(**plist)={0:0}, c=1, item={1:0}, plist={31:0}, plist={31:0}] [L533] item->next = *plist VAL [\old(c)=0, \read(**plist)={0:0}, c=1, item={1:0}, plist={31:0}, plist={31:0}] [L534] EXPR item->next VAL [\old(c)=0, c=1, item={1:0}, item->next={0:0}, plist={31:0}, plist={31:0}] [L534-L536] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L534-L536] EXPR (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={3:0}, \old(c)=0, c=1, item={1:0}, item->next={0:0}, malloc(sizeof *item)={3:0}, plist={31:0}, plist={31:0}] [L534-L536] item->data = (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={3:0}, \old(c)=0, c=1, item={1:0}, item->next={0:0}, malloc(sizeof *item)={3:0}, plist={31:0}, plist={31:0}] [L537] *plist = item VAL [\old(c)=0, c=1, item={1:0}, plist={31:0}, plist={31:0}] [L544] RET append(&list) VAL [\old(c)=0, c=1, length=0, list={31:0}] [L545] length++ VAL [\old(c)=0, c=1, length=1, list={31:0}] [L546] COND FALSE !(__VERIFIER_nondet_int() && c < 20) [L547] COND TRUE length > 0 VAL [\old(c)=0, c=1, length=1, list={31:0}] [L548] COND FALSE !(length < 0) VAL [\old(c)=0, c=1, length=1, list={31:0}] [L551] EXPR \read(*list) VAL [\old(c)=0, \read(*list)={1:0}, c=1, length=1, list={31:0}] [L551] EXPR list->next VAL [\old(c)=0, \read(*list)={1:0}, c=1, length=1, list={31:0}, list->next={0:0}] [L551] struct item *next = list->next; [L552] EXPR \read(*list) VAL [\old(c)=0, \read(*list)={1:0}, c=1, length=1, list={31:0}, next={0:0}] [L552] free(list) VAL [\old(c)=0, \read(*list)={1:0}, c=1, length=1, list={31:0}, next={0:0}] [L552] free(list) VAL [\old(c)=0, \read(*list)={1:0}, c=1, length=1, list={31:0}, next={0:0}] [L552] free(list) [L553] list = next VAL [\old(c)=0, c=1, length=1, list={31:0}, next={0:0}] [L554] length-- VAL [\old(c)=0, c=1, length=0, list={31:0}, next={0:0}] [L556] COND FALSE !(length > 0) VAL [\old(c)=0, c=1, length=0, list={31:0}, next={0:0}] [L562] return 0; [L541] struct item *list = ((void *)0); [L562] return 0; VAL [\old(c)=0, \result=0, c=1, length=0, next={0:0}] - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 558]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 559]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 559]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 122 locations, 44 error locations. Started 1 CEGAR loops. OverallTime: 52314.32ms, OverallIterations: 21, TraceHistogramMax: 2, EmptinessCheckTime: 34.97ms, AutomataDifference: 11990.50ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 14.54ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1272 SdHoareTripleChecker+Valid, 10451.92ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1269 mSDsluCounter, 467 SdHoareTripleChecker+Invalid, 9142.96ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1602 IncrementalHoareTripleChecker+Unchecked, 3872 mSDsCounter, 123 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6493 IncrementalHoareTripleChecker+Invalid, 8218 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 123 mSolverCounterUnsat, 107 mSDtfsCounter, 6493 mSolverCounterSat, 41.93ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 900 GetRequests, 693 SyntacticMatches, 24 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 25740.18ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=110occurred in iteration=14, InterpolantAutomatonStates: 149, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 117.29ms AutomataMinimizationTime, 20 MinimizatonAttempts, 229 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 209.22ms SsaConstructionTime, 840.72ms SatisfiabilityAnalysisTime, 33079.11ms InterpolantComputationTime, 472 NumberOfCodeBlocks, 472 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 836 ConstructedInterpolants, 70 QuantifiedInterpolants, 8004 SizeOfPredicates, 146 NumberOfNonLiveVariables, 2875 ConjunctsInSsa, 205 ConjunctsInUnsatCore, 40 InterpolantComputations, 32 PerfectInterpolantSequences, 35/60 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-08-30 17:38:26,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...