./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-properties/list-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-properties/list-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 6ba4928d27614bbdf140b58cd6ad1ef338e79461 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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-properties/list-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 6ba4928d27614bbdf140b58cd6ad1ef338e79461 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 18:16:27,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 18:16:27,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 18:16:27,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 18:16:27,442 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 18:16:27,445 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 18:16:27,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 18:16:27,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 18:16:27,462 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 18:16:27,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 18:16:27,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 18:16:27,470 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 18:16:27,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 18:16:27,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 18:16:27,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 18:16:27,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 18:16:27,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 18:16:27,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 18:16:27,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 18:16:27,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 18:16:27,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 18:16:27,491 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 18:16:27,493 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 18:16:27,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 18:16:27,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 18:16:27,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 18:16:27,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 18:16:27,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 18:16:27,502 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 18:16:27,503 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 18:16:27,503 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 18:16:27,504 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 18:16:27,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 18:16:27,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 18:16:27,507 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 18:16:27,507 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 18:16:27,508 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 18:16:27,508 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 18:16:27,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 18:16:27,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 18:16:27,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 18:16:27,515 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-30 18:16:27,552 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 18:16:27,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 18:16:27,553 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 18:16:27,554 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 18:16:27,555 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 18:16:27,556 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 18:16:27,556 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 18:16:27,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 18:16:27,556 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 18:16:27,556 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 18:16:27,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 18:16:27,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 18:16:27,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 18:16:27,558 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 18:16:27,558 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 18:16:27,558 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-30 18:16:27,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 18:16:27,558 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 18:16:27,559 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 18:16:27,559 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 18:16:27,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 18:16:27,559 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 18:16:27,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 18:16:27,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 18:16:27,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 18:16:27,560 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 18:16:27,560 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-30 18:16:27,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-30 18:16:27,560 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 18:16:27,561 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ba4928d27614bbdf140b58cd6ad1ef338e79461 [2021-08-30 18:16:27,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 18:16:27,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 18:16:27,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 18:16:27,941 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 18:16:27,942 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 18:16:27,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/list-1.i [2021-08-30 18:16:28,007 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0eb1c95ba/c4be87dae74e4d89b949d72d21ca9d66/FLAG6d3d77468 [2021-08-30 18:16:28,433 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 18:16:28,434 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list-1.i [2021-08-30 18:16:28,457 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0eb1c95ba/c4be87dae74e4d89b949d72d21ca9d66/FLAG6d3d77468 [2021-08-30 18:16:28,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0eb1c95ba/c4be87dae74e4d89b949d72d21ca9d66 [2021-08-30 18:16:28,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 18:16:28,827 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 18:16:28,829 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 18:16:28,829 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 18:16:28,833 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 18:16:28,833 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:16:28" (1/1) ... [2021-08-30 18:16:28,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b9b3f8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:28, skipping insertion in model container [2021-08-30 18:16:28,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:16:28" (1/1) ... [2021-08-30 18:16:28,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 18:16:28,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 18:16:29,153 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list-1.i[23408,23421] [2021-08-30 18:16:29,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 18:16:29,162 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 18:16:29,193 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list-1.i[23408,23421] [2021-08-30 18:16:29,194 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 18:16:29,226 INFO L208 MainTranslator]: Completed translation [2021-08-30 18:16:29,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:29 WrapperNode [2021-08-30 18:16:29,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 18:16:29,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 18:16:29,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 18:16:29,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 18:16:29,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:29" (1/1) ... [2021-08-30 18:16:29,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:29" (1/1) ... [2021-08-30 18:16:29,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:29" (1/1) ... [2021-08-30 18:16:29,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:29" (1/1) ... [2021-08-30 18:16:29,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:29" (1/1) ... [2021-08-30 18:16:29,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:29" (1/1) ... [2021-08-30 18:16:29,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:29" (1/1) ... [2021-08-30 18:16:29,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 18:16:29,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 18:16:29,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 18:16:29,298 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 18:16:29,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:29" (1/1) ... [2021-08-30 18:16:29,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 18:16:29,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:16:29,328 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 18:16:29,346 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 18:16:29,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 18:16:29,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 18:16:29,363 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-30 18:16:29,365 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-30 18:16:29,365 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-30 18:16:29,366 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-30 18:16:29,366 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-30 18:16:29,366 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-30 18:16:29,366 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-08-30 18:16:29,367 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 18:16:29,367 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-30 18:16:29,367 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-30 18:16:29,368 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-30 18:16:29,368 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-30 18:16:29,368 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-30 18:16:29,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 18:16:29,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-30 18:16:29,373 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-30 18:16:29,373 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-30 18:16:29,373 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-30 18:16:29,373 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-30 18:16:29,374 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-30 18:16:29,374 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-30 18:16:29,374 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-30 18:16:29,374 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-30 18:16:29,374 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-30 18:16:29,375 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-30 18:16:29,375 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-30 18:16:29,375 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-30 18:16:29,375 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-30 18:16:29,375 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-30 18:16:29,376 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-30 18:16:29,376 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-30 18:16:29,376 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-30 18:16:29,376 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-30 18:16:29,376 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-30 18:16:29,376 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-30 18:16:29,376 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-30 18:16:29,377 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-30 18:16:29,377 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-30 18:16:29,377 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-30 18:16:29,377 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-30 18:16:29,377 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-30 18:16:29,377 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-30 18:16:29,377 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-30 18:16:29,378 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-30 18:16:29,378 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-30 18:16:29,378 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-30 18:16:29,378 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-30 18:16:29,379 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-30 18:16:29,379 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-30 18:16:29,379 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-30 18:16:29,379 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-30 18:16:29,379 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-30 18:16:29,379 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-30 18:16:29,380 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-30 18:16:29,380 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-30 18:16:29,380 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-30 18:16:29,380 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-30 18:16:29,380 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-30 18:16:29,380 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-30 18:16:29,380 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-30 18:16:29,380 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-30 18:16:29,380 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-30 18:16:29,380 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-30 18:16:29,380 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-30 18:16:29,381 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-30 18:16:29,381 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-30 18:16:29,382 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-30 18:16:29,382 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-30 18:16:29,382 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-30 18:16:29,382 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-30 18:16:29,382 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-30 18:16:29,382 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-30 18:16:29,382 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-30 18:16:29,383 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-30 18:16:29,383 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-30 18:16:29,383 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-30 18:16:29,383 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-30 18:16:29,383 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-30 18:16:29,383 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-30 18:16:29,383 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-30 18:16:29,383 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-30 18:16:29,384 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-30 18:16:29,384 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-30 18:16:29,384 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-30 18:16:29,384 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-30 18:16:29,384 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-30 18:16:29,384 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-30 18:16:29,384 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-30 18:16:29,384 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-30 18:16:29,384 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-30 18:16:29,384 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-30 18:16:29,384 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-30 18:16:29,384 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-30 18:16:29,384 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-30 18:16:29,384 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-30 18:16:29,384 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-30 18:16:29,384 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-30 18:16:29,384 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-30 18:16:29,384 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-30 18:16:29,385 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-30 18:16:29,385 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-30 18:16:29,385 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-30 18:16:29,385 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-30 18:16:29,385 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-30 18:16:29,385 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-30 18:16:29,386 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-30 18:16:29,386 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-30 18:16:29,386 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-30 18:16:29,386 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-30 18:16:29,386 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-30 18:16:29,386 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-30 18:16:29,387 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-30 18:16:29,387 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-30 18:16:29,387 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-30 18:16:29,387 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-30 18:16:29,387 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-30 18:16:29,387 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-30 18:16:29,387 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-30 18:16:29,387 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-30 18:16:29,388 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-30 18:16:29,388 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-30 18:16:29,388 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-08-30 18:16:29,388 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 18:16:29,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-30 18:16:29,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-30 18:16:29,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-30 18:16:29,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-30 18:16:29,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-30 18:16:29,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 18:16:29,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-30 18:16:29,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 18:16:29,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 18:16:29,712 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-08-30 18:16:29,841 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 18:16:29,841 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-30 18:16:29,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:16:29 BoogieIcfgContainer [2021-08-30 18:16:29,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 18:16:29,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 18:16:29,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 18:16:29,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 18:16:29,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:16:28" (1/3) ... [2021-08-30 18:16:29,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62224a3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:16:29, skipping insertion in model container [2021-08-30 18:16:29,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:29" (2/3) ... [2021-08-30 18:16:29,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62224a3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:16:29, skipping insertion in model container [2021-08-30 18:16:29,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:16:29" (3/3) ... [2021-08-30 18:16:29,858 INFO L111 eAbstractionObserver]: Analyzing ICFG list-1.i [2021-08-30 18:16:29,863 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 18:16:29,864 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2021-08-30 18:16:29,908 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 18:16:29,916 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 18:16:29,916 INFO L340 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2021-08-30 18:16:29,933 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 67 states have internal predecessors, (77), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 18:16:29,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-30 18:16:29,939 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:16:29,940 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:16:29,941 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-30 18:16:29,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:16:29,955 INFO L82 PathProgramCache]: Analyzing trace with hash 85898829, now seen corresponding path program 1 times [2021-08-30 18:16:29,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:16:29,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975527616] [2021-08-30 18:16:29,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:16:29,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:16:30,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:16:30,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:16:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:16:30,210 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 18:16:30,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:16:30,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975527616] [2021-08-30 18:16:30,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975527616] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:16:30,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:16:30,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 18:16:30,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736276454] [2021-08-30 18:16:30,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 18:16:30,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:16:30,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 18:16:30,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-30 18:16:30,250 INFO L87 Difference]: Start difference. First operand has 73 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 67 states have internal predecessors, (77), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:30,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:16:30,530 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2021-08-30 18:16:30,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 18:16:30,533 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-30 18:16:30,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:16:30,539 INFO L225 Difference]: With dead ends: 80 [2021-08-30 18:16:30,540 INFO L226 Difference]: Without dead ends: 72 [2021-08-30 18:16:30,542 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.96ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-30 18:16:30,545 INFO L928 BasicCegarLoop]: 8 mSDtfsCounter, 115 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 166.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.33ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 207.07ms IncrementalHoareTripleChecker+Time [2021-08-30 18:16:30,546 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 15 Invalid, 195 Unknown, 0 Unchecked, 11.33ms Time], IncrementalHoareTripleChecker [26 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 207.07ms Time] [2021-08-30 18:16:30,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-30 18:16:30,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2021-08-30 18:16:30,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 63 states have internal predecessors, (74), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:30,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2021-08-30 18:16:30,598 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 11 [2021-08-30 18:16:30,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:16:30,598 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2021-08-30 18:16:30,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:30,598 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2021-08-30 18:16:30,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-30 18:16:30,599 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:16:30,599 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:16:30,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-30 18:16:30,600 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-30 18:16:30,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:16:30,604 INFO L82 PathProgramCache]: Analyzing trace with hash 85898830, now seen corresponding path program 1 times [2021-08-30 18:16:30,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:16:30,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764397605] [2021-08-30 18:16:30,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:16:30,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:16:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:16:30,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:16:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:16:30,755 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 18:16:30,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:16:30,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764397605] [2021-08-30 18:16:30,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764397605] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:16:30,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:16:30,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 18:16:30,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36576864] [2021-08-30 18:16:30,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 18:16:30,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:16:30,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 18:16:30,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-30 18:16:30,758 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:30,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:16:30,942 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2021-08-30 18:16:30,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 18:16:30,943 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-30 18:16:30,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:16:30,944 INFO L225 Difference]: With dead ends: 92 [2021-08-30 18:16:30,944 INFO L226 Difference]: Without dead ends: 92 [2021-08-30 18:16:30,944 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.87ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-30 18:16:30,945 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 112 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 124.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.23ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 155.93ms IncrementalHoareTripleChecker+Time [2021-08-30 18:16:30,945 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 10 Invalid, 195 Unknown, 0 Unchecked, 6.23ms Time], IncrementalHoareTripleChecker [21 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 155.93ms Time] [2021-08-30 18:16:30,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-30 18:16:30,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2021-08-30 18:16:30,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 59 states have (on average 1.4576271186440677) internal successors, (86), 77 states have internal predecessors, (86), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:30,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2021-08-30 18:16:30,957 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 11 [2021-08-30 18:16:30,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:16:30,957 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2021-08-30 18:16:30,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:30,958 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2021-08-30 18:16:30,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-30 18:16:30,959 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:16:30,960 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:16:30,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-30 18:16:30,971 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-30 18:16:30,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:16:30,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1250386406, now seen corresponding path program 1 times [2021-08-30 18:16:30,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:16:30,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061571392] [2021-08-30 18:16:30,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:16:30,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:16:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:16:31,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:16:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:16:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:16:31,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:16:31,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061571392] [2021-08-30 18:16:31,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061571392] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:16:31,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:16:31,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-30 18:16:31,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533188250] [2021-08-30 18:16:31,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 18:16:31,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:16:31,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 18:16:31,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-30 18:16:31,062 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:31,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:16:31,334 INFO L93 Difference]: Finished difference Result 120 states and 127 transitions. [2021-08-30 18:16:31,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 18:16:31,335 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-08-30 18:16:31,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:16:31,336 INFO L225 Difference]: With dead ends: 120 [2021-08-30 18:16:31,336 INFO L226 Difference]: Without dead ends: 120 [2021-08-30 18:16:31,336 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.62ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-30 18:16:31,337 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 76 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 169.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.87ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 215.72ms IncrementalHoareTripleChecker+Time [2021-08-30 18:16:31,338 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 16 Invalid, 364 Unknown, 0 Unchecked, 2.87ms Time], IncrementalHoareTripleChecker [9 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 215.72ms Time] [2021-08-30 18:16:31,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-08-30 18:16:31,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 84. [2021-08-30 18:16:31,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 62 states have (on average 1.435483870967742) internal successors, (89), 80 states have internal predecessors, (89), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:31,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2021-08-30 18:16:31,345 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 19 [2021-08-30 18:16:31,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:16:31,345 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2021-08-30 18:16:31,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:31,346 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2021-08-30 18:16:31,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-30 18:16:31,346 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:16:31,346 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:16:31,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-30 18:16:31,346 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-30 18:16:31,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:16:31,347 INFO L82 PathProgramCache]: Analyzing trace with hash 13452608, now seen corresponding path program 1 times [2021-08-30 18:16:31,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:16:31,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609954916] [2021-08-30 18:16:31,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:16:31,347 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:16:31,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:16:31,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:16:31,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:16:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:16:31,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:16:31,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609954916] [2021-08-30 18:16:31,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609954916] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:16:31,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:16:31,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 18:16:31,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131339953] [2021-08-30 18:16:31,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 18:16:31,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:16:31,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 18:16:31,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-30 18:16:31,416 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:31,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:16:31,686 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2021-08-30 18:16:31,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 18:16:31,686 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-08-30 18:16:31,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:16:31,687 INFO L225 Difference]: With dead ends: 109 [2021-08-30 18:16:31,687 INFO L226 Difference]: Without dead ends: 109 [2021-08-30 18:16:31,688 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.79ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-30 18:16:31,689 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 87 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 181.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.98ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 229.46ms IncrementalHoareTripleChecker+Time [2021-08-30 18:16:31,689 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 16 Invalid, 444 Unknown, 0 Unchecked, 2.98ms Time], IncrementalHoareTripleChecker [13 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 229.46ms Time] [2021-08-30 18:16:31,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-30 18:16:31,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2021-08-30 18:16:31,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 66 states have (on average 1.4393939393939394) internal successors, (95), 83 states have internal predecessors, (95), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:31,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2021-08-30 18:16:31,695 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 19 [2021-08-30 18:16:31,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:16:31,696 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2021-08-30 18:16:31,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:31,696 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2021-08-30 18:16:31,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-30 18:16:31,697 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:16:31,697 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:16:31,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-30 18:16:31,697 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-30 18:16:31,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:16:31,698 INFO L82 PathProgramCache]: Analyzing trace with hash 13452609, now seen corresponding path program 1 times [2021-08-30 18:16:31,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:16:31,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828073215] [2021-08-30 18:16:31,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:16:31,699 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:16:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:16:31,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:16:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:16:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:16:31,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:16:31,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828073215] [2021-08-30 18:16:31,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828073215] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:16:31,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:16:31,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 18:16:31,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139931560] [2021-08-30 18:16:31,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 18:16:31,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:16:31,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 18:16:31,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-30 18:16:31,800 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:32,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:16:32,123 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2021-08-30 18:16:32,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 18:16:32,124 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-08-30 18:16:32,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:16:32,125 INFO L225 Difference]: With dead ends: 110 [2021-08-30 18:16:32,125 INFO L226 Difference]: Without dead ends: 110 [2021-08-30 18:16:32,125 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 115.82ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-30 18:16:32,126 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 61 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 196.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.55ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 237.14ms IncrementalHoareTripleChecker+Time [2021-08-30 18:16:32,126 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 16 Invalid, 504 Unknown, 0 Unchecked, 2.55ms Time], IncrementalHoareTripleChecker [12 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 237.14ms Time] [2021-08-30 18:16:32,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-08-30 18:16:32,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 78. [2021-08-30 18:16:32,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 60 states have (on average 1.4) internal successors, (84), 74 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:32,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2021-08-30 18:16:32,132 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 19 [2021-08-30 18:16:32,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:16:32,132 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2021-08-30 18:16:32,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:32,133 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2021-08-30 18:16:32,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-30 18:16:32,133 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:16:32,133 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] [2021-08-30 18:16:32,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-30 18:16:32,134 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr24ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-30 18:16:32,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:16:32,134 INFO L82 PathProgramCache]: Analyzing trace with hash 921876220, now seen corresponding path program 1 times [2021-08-30 18:16:32,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:16:32,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409280224] [2021-08-30 18:16:32,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:16:32,135 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:16:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:16:32,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:16:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:16:32,203 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 18:16:32,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:16:32,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409280224] [2021-08-30 18:16:32,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409280224] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:16:32,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:16:32,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-30 18:16:32,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993758823] [2021-08-30 18:16:32,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 18:16:32,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:16:32,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 18:16:32,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-30 18:16:32,205 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:32,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:16:32,415 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2021-08-30 18:16:32,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 18:16:32,416 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-08-30 18:16:32,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:16:32,417 INFO L225 Difference]: With dead ends: 122 [2021-08-30 18:16:32,417 INFO L226 Difference]: Without dead ends: 122 [2021-08-30 18:16:32,417 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.74ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-30 18:16:32,418 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 66 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 143.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.89ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 177.61ms IncrementalHoareTripleChecker+Time [2021-08-30 18:16:32,418 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 16 Invalid, 347 Unknown, 0 Unchecked, 1.89ms Time], IncrementalHoareTripleChecker [9 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 177.61ms Time] [2021-08-30 18:16:32,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-08-30 18:16:32,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2021-08-30 18:16:32,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.390625) internal successors, (89), 78 states have internal predecessors, (89), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:32,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2021-08-30 18:16:32,423 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 21 [2021-08-30 18:16:32,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:16:32,423 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2021-08-30 18:16:32,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:32,424 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2021-08-30 18:16:32,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-30 18:16:32,424 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:16:32,424 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] [2021-08-30 18:16:32,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-30 18:16:32,430 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-30 18:16:32,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:16:32,430 INFO L82 PathProgramCache]: Analyzing trace with hash 921928775, now seen corresponding path program 1 times [2021-08-30 18:16:32,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:16:32,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877418028] [2021-08-30 18:16:32,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:16:32,431 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:16:32,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:16:32,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:16:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:16:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:16:32,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:16:32,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877418028] [2021-08-30 18:16:32,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877418028] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:16:32,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:16:32,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-30 18:16:32,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734873749] [2021-08-30 18:16:32,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 18:16:32,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:16:32,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 18:16:32,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-30 18:16:32,510 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:32,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:16:32,733 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2021-08-30 18:16:32,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 18:16:32,733 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-08-30 18:16:32,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:16:32,734 INFO L225 Difference]: With dead ends: 105 [2021-08-30 18:16:32,734 INFO L226 Difference]: Without dead ends: 105 [2021-08-30 18:16:32,735 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.28ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-30 18:16:32,735 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 140.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.94ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 176.49ms IncrementalHoareTripleChecker+Time [2021-08-30 18:16:32,736 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 16 Invalid, 330 Unknown, 0 Unchecked, 1.94ms Time], IncrementalHoareTripleChecker [9 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 176.49ms Time] [2021-08-30 18:16:32,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-08-30 18:16:32,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 82. [2021-08-30 18:16:32,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.375) internal successors, (88), 78 states have internal predecessors, (88), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:32,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2021-08-30 18:16:32,741 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 21 [2021-08-30 18:16:32,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:16:32,741 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2021-08-30 18:16:32,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:32,742 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2021-08-30 18:16:32,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-30 18:16:32,742 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:16:32,742 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:16:32,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-30 18:16:32,743 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-30 18:16:32,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:16:32,743 INFO L82 PathProgramCache]: Analyzing trace with hash 626114546, now seen corresponding path program 1 times [2021-08-30 18:16:32,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:16:32,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769724120] [2021-08-30 18:16:32,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:16:32,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:16:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:16:32,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:16:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:16:32,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:16:32,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:16:32,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769724120] [2021-08-30 18:16:32,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769724120] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:16:32,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:16:32,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 18:16:32,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821291669] [2021-08-30 18:16:32,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 18:16:32,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:16:32,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 18:16:32,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-30 18:16:32,799 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:32,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:16:32,993 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2021-08-30 18:16:32,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 18:16:32,993 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-08-30 18:16:32,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:16:32,994 INFO L225 Difference]: With dead ends: 88 [2021-08-30 18:16:32,994 INFO L226 Difference]: Without dead ends: 88 [2021-08-30 18:16:32,994 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.89ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-30 18:16:32,995 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 80 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 128.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.81ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 162.90ms IncrementalHoareTripleChecker+Time [2021-08-30 18:16:32,995 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 16 Invalid, 347 Unknown, 0 Unchecked, 1.81ms Time], IncrementalHoareTripleChecker [12 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 162.90ms Time] [2021-08-30 18:16:32,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-30 18:16:32,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2021-08-30 18:16:32,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 64 states have (on average 1.34375) internal successors, (86), 76 states have internal predecessors, (86), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:32,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2021-08-30 18:16:32,999 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 21 [2021-08-30 18:16:32,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:16:33,000 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2021-08-30 18:16:33,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:33,000 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2021-08-30 18:16:33,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-30 18:16:33,000 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:16:33,000 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:16:33,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-30 18:16:33,001 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-30 18:16:33,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:16:33,001 INFO L82 PathProgramCache]: Analyzing trace with hash 626114547, now seen corresponding path program 1 times [2021-08-30 18:16:33,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:16:33,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762024555] [2021-08-30 18:16:33,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:16:33,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:16:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:16:33,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 18:16:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:16:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:16:33,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 18:16:33,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762024555] [2021-08-30 18:16:33,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762024555] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 18:16:33,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:16:33,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 18:16:33,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173683019] [2021-08-30 18:16:33,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 18:16:33,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 18:16:33,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 18:16:33,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-30 18:16:33,074 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:33,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:16:33,328 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2021-08-30 18:16:33,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 18:16:33,329 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-08-30 18:16:33,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:16:33,329 INFO L225 Difference]: With dead ends: 85 [2021-08-30 18:16:33,329 INFO L226 Difference]: Without dead ends: 85 [2021-08-30 18:16:33,330 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 91.88ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-30 18:16:33,330 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 144.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.78ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 182.99ms IncrementalHoareTripleChecker+Time [2021-08-30 18:16:33,330 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 16 Invalid, 378 Unknown, 0 Unchecked, 1.78ms Time], IncrementalHoareTripleChecker [8 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 182.99ms Time] [2021-08-30 18:16:33,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-30 18:16:33,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 68. [2021-08-30 18:16:33,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 64 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:33,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2021-08-30 18:16:33,336 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 21 [2021-08-30 18:16:33,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:16:33,336 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2021-08-30 18:16:33,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:33,337 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2021-08-30 18:16:33,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-30 18:16:33,337 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:16:33,337 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] [2021-08-30 18:16:33,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-30 18:16:33,338 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr25ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-30 18:16:33,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:16:33,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1486603147, now seen corresponding path program 1 times [2021-08-30 18:16:33,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 18:16:33,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375438924] [2021-08-30 18:16:33,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:16:33,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 18:16:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 18:16:33,357 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-30 18:16:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 18:16:33,386 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-30 18:16:33,386 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-30 18:16:33,387 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr25ENSURES_VIOLATIONMEMORY_LEAK (25 of 26 remaining) [2021-08-30 18:16:33,389 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION (24 of 26 remaining) [2021-08-30 18:16:33,389 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION (23 of 26 remaining) [2021-08-30 18:16:33,390 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION (22 of 26 remaining) [2021-08-30 18:16:33,390 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION (21 of 26 remaining) [2021-08-30 18:16:33,390 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION (20 of 26 remaining) [2021-08-30 18:16:33,390 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION (19 of 26 remaining) [2021-08-30 18:16:33,390 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION (18 of 26 remaining) [2021-08-30 18:16:33,394 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION (17 of 26 remaining) [2021-08-30 18:16:33,394 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION (16 of 26 remaining) [2021-08-30 18:16:33,394 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION (15 of 26 remaining) [2021-08-30 18:16:33,395 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION (14 of 26 remaining) [2021-08-30 18:16:33,395 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION (13 of 26 remaining) [2021-08-30 18:16:33,395 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION (12 of 26 remaining) [2021-08-30 18:16:33,395 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION (11 of 26 remaining) [2021-08-30 18:16:33,396 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION (10 of 26 remaining) [2021-08-30 18:16:33,396 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION (9 of 26 remaining) [2021-08-30 18:16:33,396 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION (8 of 26 remaining) [2021-08-30 18:16:33,396 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION (7 of 26 remaining) [2021-08-30 18:16:33,396 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION (6 of 26 remaining) [2021-08-30 18:16:33,397 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION (5 of 26 remaining) [2021-08-30 18:16:33,397 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION (4 of 26 remaining) [2021-08-30 18:16:33,397 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION (3 of 26 remaining) [2021-08-30 18:16:33,397 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION (2 of 26 remaining) [2021-08-30 18:16:33,397 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION (1 of 26 remaining) [2021-08-30 18:16:33,398 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24ASSERT_VIOLATIONMEMORY_LEAK (0 of 26 remaining) [2021-08-30 18:16:33,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-30 18:16:33,403 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 18:16:33,410 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-08-30 18:16:33,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 06:16:33 BoogieIcfgContainer [2021-08-30 18:16:33,420 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 18:16:33,421 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 18:16:33,421 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 18:16:33,421 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 18:16:33,421 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:16:29" (3/4) ... [2021-08-30 18:16:33,423 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-30 18:16:33,424 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 18:16:33,424 INFO L158 Benchmark]: Toolchain (without parser) took 4597.72ms. Allocated memory was 58.7MB in the beginning and 86.0MB in the end (delta: 27.3MB). Free memory was 36.0MB in the beginning and 61.3MB in the end (delta: -25.3MB). Peak memory consumption was 1.9MB. Max. memory is 16.1GB. [2021-08-30 18:16:33,424 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 58.7MB. Free memory is still 40.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 18:16:33,425 INFO L158 Benchmark]: CACSL2BoogieTranslator took 398.21ms. Allocated memory is still 58.7MB. Free memory was 35.8MB in the beginning and 35.5MB in the end (delta: 341.4kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-08-30 18:16:33,425 INFO L158 Benchmark]: Boogie Preprocessor took 68.72ms. Allocated memory is still 58.7MB. Free memory was 35.5MB in the beginning and 32.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 18:16:33,425 INFO L158 Benchmark]: RCFGBuilder took 551.73ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 32.6MB in the beginning and 42.3MB in the end (delta: -9.8MB). Peak memory consumption was 14.6MB. Max. memory is 16.1GB. [2021-08-30 18:16:33,426 INFO L158 Benchmark]: TraceAbstraction took 3568.32ms. Allocated memory was 71.3MB in the beginning and 86.0MB in the end (delta: 14.7MB). Free memory was 42.0MB in the beginning and 62.0MB in the end (delta: -20.0MB). Peak memory consumption was 29.9MB. Max. memory is 16.1GB. [2021-08-30 18:16:33,426 INFO L158 Benchmark]: Witness Printer took 3.15ms. Allocated memory is still 86.0MB. Free memory was 62.0MB in the beginning and 61.3MB in the end (delta: 765.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 18:16:33,427 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 58.7MB. Free memory is still 40.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 398.21ms. Allocated memory is still 58.7MB. Free memory was 35.8MB in the beginning and 35.5MB in the end (delta: 341.4kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 68.72ms. Allocated memory is still 58.7MB. Free memory was 35.5MB in the beginning and 32.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 551.73ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 32.6MB in the beginning and 42.3MB in the end (delta: -9.8MB). Peak memory consumption was 14.6MB. Max. memory is 16.1GB. * TraceAbstraction took 3568.32ms. Allocated memory was 71.3MB in the beginning and 86.0MB in the end (delta: 14.7MB). Free memory was 42.0MB in the beginning and 62.0MB in the end (delta: -20.0MB). Peak memory consumption was 29.9MB. Max. memory is 16.1GB. * Witness Printer took 3.15ms. Allocated memory is still 86.0MB. Free memory was 62.0MB in the beginning and 61.3MB in the end (delta: 765.8kB). 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: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) VAL [a={-1:0}] [L534] List t; [L535] List p = a; VAL [a={-1:0}, p={-1:0}] [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 VAL [a={-1:0}, p={-1:0}] [L551] p = a VAL [a={-1:0}, p={-1:0}] [L552] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=3] [L552] COND FALSE !(p->h == 1) [L554] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=3] [L554] COND FALSE !(p->h == 2) [L556] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=3] [L556] COND FALSE !(p->h != 3) [L558] return 0; VAL [\result=0, a={-1:0}, p={-1:0}] - 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. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: 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: 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: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: 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 all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 92 locations, 26 error locations. Started 1 CEGAR loops. OverallTime: 3494.87ms, OverallIterations: 10, TraceHistogramMax: 2, EmptinessCheckTime: 16.45ms, AutomataDifference: 2292.26ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 12.91ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 696 SdHoareTripleChecker+Valid, 1745.31ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 696 mSDsluCounter, 137 SdHoareTripleChecker+Invalid, 1397.06ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 939 mSDsCounter, 119 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2985 IncrementalHoareTripleChecker+Invalid, 3104 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 119 mSolverCounterUnsat, 32 mSDtfsCounter, 2985 mSolverCounterSat, 33.38ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 561.84ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=4, InterpolantAutomatonStates: 67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 84.30ms AutomataMinimizationTime, 9 MinimizatonAttempts, 194 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 24.33ms SsaConstructionTime, 121.83ms SatisfiabilityAnalysisTime, 690.14ms InterpolantComputationTime, 185 NumberOfCodeBlocks, 185 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 154 ConstructedInterpolants, 0 QuantifiedInterpolants, 802 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 12/12 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 18:16:33,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-30 18:16:35,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 18:16:35,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 18:16:35,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 18:16:35,327 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 18:16:35,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 18:16:35,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 18:16:35,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 18:16:35,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 18:16:35,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 18:16:35,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 18:16:35,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 18:16:35,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 18:16:35,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 18:16:35,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 18:16:35,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 18:16:35,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 18:16:35,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 18:16:35,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 18:16:35,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 18:16:35,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 18:16:35,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 18:16:35,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 18:16:35,369 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 18:16:35,374 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 18:16:35,374 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 18:16:35,375 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 18:16:35,376 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 18:16:35,376 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 18:16:35,377 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 18:16:35,377 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 18:16:35,378 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 18:16:35,379 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 18:16:35,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 18:16:35,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 18:16:35,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 18:16:35,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 18:16:35,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 18:16:35,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 18:16:35,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 18:16:35,384 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 18:16:35,388 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-08-30 18:16:35,420 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 18:16:35,421 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 18:16:35,422 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 18:16:35,422 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 18:16:35,424 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 18:16:35,424 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 18:16:35,424 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 18:16:35,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 18:16:35,425 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 18:16:35,425 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 18:16:35,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 18:16:35,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 18:16:35,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 18:16:35,426 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 18:16:35,426 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 18:16:35,427 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-30 18:16:35,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 18:16:35,434 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 18:16:35,434 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-30 18:16:35,434 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-30 18:16:35,434 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 18:16:35,434 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 18:16:35,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 18:16:35,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 18:16:35,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 18:16:35,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 18:16:35,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 18:16:35,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 18:16:35,436 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-30 18:16:35,436 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-30 18:16:35,436 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 18:16:35,437 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-30 18:16:35,437 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ba4928d27614bbdf140b58cd6ad1ef338e79461 [2021-08-30 18:16:35,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 18:16:35,785 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 18:16:35,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 18:16:35,788 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 18:16:35,789 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 18:16:35,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/list-1.i [2021-08-30 18:16:35,849 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8ec988c9/15d6343e594d43779f0a0e48f18eede8/FLAG1a5b9ba78 [2021-08-30 18:16:36,274 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 18:16:36,275 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list-1.i [2021-08-30 18:16:36,291 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8ec988c9/15d6343e594d43779f0a0e48f18eede8/FLAG1a5b9ba78 [2021-08-30 18:16:36,601 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8ec988c9/15d6343e594d43779f0a0e48f18eede8 [2021-08-30 18:16:36,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 18:16:36,606 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 18:16:36,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 18:16:36,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 18:16:36,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 18:16:36,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:16:36" (1/1) ... [2021-08-30 18:16:36,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47422cd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:36, skipping insertion in model container [2021-08-30 18:16:36,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:16:36" (1/1) ... [2021-08-30 18:16:36,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 18:16:36,655 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 18:16:36,907 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list-1.i[23408,23421] [2021-08-30 18:16:36,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 18:16:36,931 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 18:16:36,966 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list-1.i[23408,23421] [2021-08-30 18:16:36,967 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 18:16:36,993 INFO L208 MainTranslator]: Completed translation [2021-08-30 18:16:36,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:36 WrapperNode [2021-08-30 18:16:36,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 18:16:36,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 18:16:36,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 18:16:36,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 18:16:37,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:36" (1/1) ... [2021-08-30 18:16:37,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:36" (1/1) ... [2021-08-30 18:16:37,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:36" (1/1) ... [2021-08-30 18:16:37,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:36" (1/1) ... [2021-08-30 18:16:37,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:36" (1/1) ... [2021-08-30 18:16:37,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:36" (1/1) ... [2021-08-30 18:16:37,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:36" (1/1) ... [2021-08-30 18:16:37,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 18:16:37,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 18:16:37,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 18:16:37,051 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 18:16:37,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:36" (1/1) ... [2021-08-30 18:16:37,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 18:16:37,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 18:16:37,088 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 18:16:37,090 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 18:16:37,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 18:16:37,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 18:16:37,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-08-30 18:16:37,116 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-30 18:16:37,116 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-30 18:16:37,116 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-30 18:16:37,116 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-30 18:16:37,116 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-30 18:16:37,116 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-30 18:16:37,117 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-08-30 18:16:37,117 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 18:16:37,117 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-30 18:16:37,117 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-30 18:16:37,117 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-30 18:16:37,117 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-30 18:16:37,118 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-30 18:16:37,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 18:16:37,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-30 18:16:37,118 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-30 18:16:37,118 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-30 18:16:37,118 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-30 18:16:37,118 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-30 18:16:37,119 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-30 18:16:37,119 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-30 18:16:37,119 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-30 18:16:37,119 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-30 18:16:37,119 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-30 18:16:37,119 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-30 18:16:37,119 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-30 18:16:37,120 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-30 18:16:37,120 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-30 18:16:37,120 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-30 18:16:37,120 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-30 18:16:37,120 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-30 18:16:37,136 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-30 18:16:37,136 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-30 18:16:37,136 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-30 18:16:37,137 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-30 18:16:37,137 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-30 18:16:37,137 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-30 18:16:37,137 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-30 18:16:37,137 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-30 18:16:37,137 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-30 18:16:37,138 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-30 18:16:37,138 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-30 18:16:37,138 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-30 18:16:37,139 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-30 18:16:37,139 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-30 18:16:37,139 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-30 18:16:37,139 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-30 18:16:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-30 18:16:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-30 18:16:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-30 18:16:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-30 18:16:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-30 18:16:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-30 18:16:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-30 18:16:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-30 18:16:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-30 18:16:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-30 18:16:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-30 18:16:37,142 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-30 18:16:37,142 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-30 18:16:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-30 18:16:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-30 18:16:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-30 18:16:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-30 18:16:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-30 18:16:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-30 18:16:37,144 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-30 18:16:37,144 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-30 18:16:37,144 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-30 18:16:37,144 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-30 18:16:37,144 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-30 18:16:37,144 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-30 18:16:37,144 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-30 18:16:37,144 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-30 18:16:37,144 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-30 18:16:37,144 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-30 18:16:37,144 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-30 18:16:37,144 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-30 18:16:37,144 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-30 18:16:37,144 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-30 18:16:37,145 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-30 18:16:37,145 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-30 18:16:37,145 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-30 18:16:37,145 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-30 18:16:37,145 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-30 18:16:37,145 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-30 18:16:37,145 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-30 18:16:37,145 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-30 18:16:37,145 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-30 18:16:37,145 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-30 18:16:37,145 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-30 18:16:37,145 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-30 18:16:37,145 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-30 18:16:37,146 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-30 18:16:37,146 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-30 18:16:37,146 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-30 18:16:37,146 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-30 18:16:37,146 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-30 18:16:37,146 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-30 18:16:37,146 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-30 18:16:37,146 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-30 18:16:37,146 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-30 18:16:37,146 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-30 18:16:37,146 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-30 18:16:37,146 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-30 18:16:37,147 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-30 18:16:37,147 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-30 18:16:37,147 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-30 18:16:37,147 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-30 18:16:37,147 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-30 18:16:37,147 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-30 18:16:37,147 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-30 18:16:37,147 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-30 18:16:37,147 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-30 18:16:37,147 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-30 18:16:37,148 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-30 18:16:37,148 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-30 18:16:37,148 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-30 18:16:37,148 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-30 18:16:37,148 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-30 18:16:37,148 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-30 18:16:37,148 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-08-30 18:16:37,148 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 18:16:37,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-30 18:16:37,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-08-30 18:16:37,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-30 18:16:37,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-30 18:16:37,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-08-30 18:16:37,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 18:16:37,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-30 18:16:37,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 18:16:37,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-08-30 18:16:37,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-08-30 18:16:37,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-08-30 18:16:37,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 18:16:37,413 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-08-30 18:16:37,556 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 18:16:37,556 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-30 18:16:37,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:16:37 BoogieIcfgContainer [2021-08-30 18:16:37,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 18:16:37,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 18:16:37,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 18:16:37,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 18:16:37,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:16:36" (1/3) ... [2021-08-30 18:16:37,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68fd6be2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:16:37, skipping insertion in model container [2021-08-30 18:16:37,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:16:36" (2/3) ... [2021-08-30 18:16:37,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68fd6be2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:16:37, skipping insertion in model container [2021-08-30 18:16:37,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:16:37" (3/3) ... [2021-08-30 18:16:37,569 INFO L111 eAbstractionObserver]: Analyzing ICFG list-1.i [2021-08-30 18:16:37,574 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 18:16:37,574 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2021-08-30 18:16:37,619 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 18:16:37,627 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 18:16:37,627 INFO L340 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2021-08-30 18:16:37,642 INFO L276 IsEmpty]: Start isEmpty. Operand has 71 states, 37 states have (on average 2.027027027027027) internal successors, (75), 65 states have internal predecessors, (75), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 18:16:37,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 18:16:37,658 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:16:37,659 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:16:37,660 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-30 18:16:37,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:16:37,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1692035718, now seen corresponding path program 1 times [2021-08-30 18:16:37,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:16:37,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737245371] [2021-08-30 18:16:37,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:16:37,679 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:16:37,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:16:37,685 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 18:16:37,692 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 18:16:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:16:37,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-30 18:16:37,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:16:37,950 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 18:16:37,985 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 18:16:37,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:16:38,023 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 18:16:38,024 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:16:38,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737245371] [2021-08-30 18:16:38,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737245371] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:16:38,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:16:38,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-08-30 18:16:38,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500908484] [2021-08-30 18:16:38,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 18:16:38,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:16:38,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 18:16:38,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 18:16:38,055 INFO L87 Difference]: Start difference. First operand has 71 states, 37 states have (on average 2.027027027027027) internal successors, (75), 65 states have internal predecessors, (75), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:38,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:16:38,342 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2021-08-30 18:16:38,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 18:16:38,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 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 18:16:38,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:16:38,350 INFO L225 Difference]: With dead ends: 76 [2021-08-30 18:16:38,350 INFO L226 Difference]: Without dead ends: 68 [2021-08-30 18:16:38,352 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.76ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-30 18:16:38,363 INFO L928 BasicCegarLoop]: 8 mSDtfsCounter, 108 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 190.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.60ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 245.63ms IncrementalHoareTripleChecker+Time [2021-08-30 18:16:38,364 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 16 Invalid, 121 Unknown, 0 Unchecked, 3.60ms Time], IncrementalHoareTripleChecker [22 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 245.63ms Time] [2021-08-30 18:16:38,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-30 18:16:38,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2021-08-30 18:16:38,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 59 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:38,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2021-08-30 18:16:38,392 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 10 [2021-08-30 18:16:38,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:16:38,393 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2021-08-30 18:16:38,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:38,393 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2021-08-30 18:16:38,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 18:16:38,394 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:16:38,394 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:16:38,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-08-30 18:16:38,606 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 18:16:38,607 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-30 18:16:38,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:16:38,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1692035717, now seen corresponding path program 1 times [2021-08-30 18:16:38,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:16:38,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715710027] [2021-08-30 18:16:38,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:16:38,609 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:16:38,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:16:38,610 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 18:16:38,612 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 18:16:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:16:38,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-30 18:16:38,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:16:38,762 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 18:16:38,809 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 18:16:38,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:16:38,941 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 18:16:38,941 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:16:38,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715710027] [2021-08-30 18:16:38,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715710027] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:16:38,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:16:38,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-08-30 18:16:38,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809025985] [2021-08-30 18:16:38,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 18:16:38,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:16:38,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 18:16:38,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-30 18:16:38,945 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:39,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:16:39,384 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2021-08-30 18:16:39,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 18:16:39,385 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 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 18:16:39,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:16:39,386 INFO L225 Difference]: With dead ends: 87 [2021-08-30 18:16:39,386 INFO L226 Difference]: Without dead ends: 87 [2021-08-30 18:16:39,387 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 97.43ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-30 18:16:39,388 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 224 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 316.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.66ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 382.34ms IncrementalHoareTripleChecker+Time [2021-08-30 18:16:39,388 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 9 Invalid, 149 Unknown, 0 Unchecked, 3.66ms Time], IncrementalHoareTripleChecker [38 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 382.34ms Time] [2021-08-30 18:16:39,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-08-30 18:16:39,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2021-08-30 18:16:39,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 54 states have (on average 1.462962962962963) internal successors, (79), 71 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:39,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-08-30 18:16:39,395 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 10 [2021-08-30 18:16:39,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:16:39,396 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-08-30 18:16:39,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:39,396 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-08-30 18:16:39,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-30 18:16:39,397 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:16:39,397 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:16:39,411 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 18:16:39,610 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 18:16:39,610 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-30 18:16:39,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:16:39,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1869130219, now seen corresponding path program 1 times [2021-08-30 18:16:39,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:16:39,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789232610] [2021-08-30 18:16:39,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:16:39,612 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:16:39,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:16:39,613 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 18:16:39,615 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 18:16:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:16:39,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-30 18:16:39,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:16:39,820 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 18:16:39,867 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 18:16:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:16:39,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:16:39,941 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 12 [2021-08-30 18:16:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:16:40,008 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:16:40,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789232610] [2021-08-30 18:16:40,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789232610] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:16:40,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:16:40,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-08-30 18:16:40,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782884129] [2021-08-30 18:16:40,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 18:16:40,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:16:40,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 18:16:40,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-30 18:16:40,010 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:40,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:16:40,631 INFO L93 Difference]: Finished difference Result 153 states and 160 transitions. [2021-08-30 18:16:40,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-30 18:16:40,632 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-08-30 18:16:40,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:16:40,633 INFO L225 Difference]: With dead ends: 153 [2021-08-30 18:16:40,633 INFO L226 Difference]: Without dead ends: 153 [2021-08-30 18:16:40,634 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 160.83ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-08-30 18:16:40,635 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 183 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 413.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.88ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 486.87ms IncrementalHoareTripleChecker+Time [2021-08-30 18:16:40,635 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 15 Invalid, 370 Unknown, 0 Unchecked, 3.88ms Time], IncrementalHoareTripleChecker [31 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 486.87ms Time] [2021-08-30 18:16:40,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-08-30 18:16:40,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 81. [2021-08-30 18:16:40,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 60 states have (on average 1.4666666666666666) internal successors, (88), 77 states have internal predecessors, (88), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:40,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2021-08-30 18:16:40,646 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 17 [2021-08-30 18:16:40,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:16:40,646 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2021-08-30 18:16:40,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:40,647 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2021-08-30 18:16:40,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-30 18:16:40,647 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:16:40,647 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:16:40,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-08-30 18:16:40,852 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 18:16:40,853 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-30 18:16:40,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:16:40,854 INFO L82 PathProgramCache]: Analyzing trace with hash 674842861, now seen corresponding path program 1 times [2021-08-30 18:16:40,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:16:40,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844780595] [2021-08-30 18:16:40,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:16:40,855 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:16:40,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:16:40,856 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 18:16:40,857 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 18:16:40,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:16:40,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-30 18:16:40,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:16:40,996 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 18:16:41,020 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 23 treesize of output 19 [2021-08-30 18:16:41,042 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 13 [2021-08-30 18:16:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:16:41,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:16:41,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:16:41,145 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:16:41,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844780595] [2021-08-30 18:16:41,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844780595] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:16:41,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:16:41,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-08-30 18:16:41,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17673708] [2021-08-30 18:16:41,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 18:16:41,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:16:41,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 18:16:41,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 18:16:41,146 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:41,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:16:41,622 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2021-08-30 18:16:41,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 18:16:41,623 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-08-30 18:16:41,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:16:41,624 INFO L225 Difference]: With dead ends: 105 [2021-08-30 18:16:41,624 INFO L226 Difference]: Without dead ends: 105 [2021-08-30 18:16:41,624 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 71.36ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-30 18:16:41,625 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 81 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 356.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.91ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 422.40ms IncrementalHoareTripleChecker+Time [2021-08-30 18:16:41,626 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 15 Invalid, 319 Unknown, 0 Unchecked, 2.91ms Time], IncrementalHoareTripleChecker [12 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 422.40ms Time] [2021-08-30 18:16:41,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-08-30 18:16:41,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 83. [2021-08-30 18:16:41,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 63 states have (on average 1.4761904761904763) internal successors, (93), 79 states have internal predecessors, (93), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:41,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2021-08-30 18:16:41,631 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 17 [2021-08-30 18:16:41,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:16:41,632 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2021-08-30 18:16:41,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:41,632 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2021-08-30 18:16:41,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-30 18:16:41,633 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:16:41,633 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:16:41,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-08-30 18:16:41,842 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 18:16:41,842 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-30 18:16:41,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:16:41,842 INFO L82 PathProgramCache]: Analyzing trace with hash 674842862, now seen corresponding path program 1 times [2021-08-30 18:16:41,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:16:41,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533569205] [2021-08-30 18:16:41,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:16:41,843 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:16:41,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:16:41,844 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 18:16:41,848 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 18:16:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:16:41,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-30 18:16:41,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:16:41,978 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 18:16:42,015 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 18:16:42,023 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 13 treesize of output 9 [2021-08-30 18:16:42,063 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 39 treesize of output 27 [2021-08-30 18:16:42,079 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 12 [2021-08-30 18:16:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:16:42,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:16:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:16:42,360 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:16:42,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533569205] [2021-08-30 18:16:42,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533569205] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:16:42,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:16:42,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-08-30 18:16:42,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747081225] [2021-08-30 18:16:42,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-30 18:16:42,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:16:42,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-30 18:16:42,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-30 18:16:42,363 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:43,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:16:43,576 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2021-08-30 18:16:43,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-30 18:16:43,577 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-08-30 18:16:43,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:16:43,578 INFO L225 Difference]: With dead ends: 107 [2021-08-30 18:16:43,578 INFO L226 Difference]: Without dead ends: 107 [2021-08-30 18:16:43,578 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 272.00ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-30 18:16:43,579 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 73 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 951.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.09ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1077.46ms IncrementalHoareTripleChecker+Time [2021-08-30 18:16:43,579 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 27 Invalid, 621 Unknown, 0 Unchecked, 4.09ms Time], IncrementalHoareTripleChecker [16 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 1077.46ms Time] [2021-08-30 18:16:43,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-08-30 18:16:43,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 79. [2021-08-30 18:16:43,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 62 states have (on average 1.403225806451613) internal successors, (87), 75 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:43,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2021-08-30 18:16:43,584 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 17 [2021-08-30 18:16:43,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:16:43,584 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2021-08-30 18:16:43,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:43,585 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2021-08-30 18:16:43,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-30 18:16:43,585 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:16:43,585 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:16:43,602 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 18:16:43,794 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 18:16:43,795 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-30 18:16:43,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:16:43,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1426802311, now seen corresponding path program 1 times [2021-08-30 18:16:43,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:16:43,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895228283] [2021-08-30 18:16:43,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:16:43,796 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:16:43,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:16:43,797 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 18:16:43,798 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 18:16:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:16:43,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-30 18:16:43,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:16:43,922 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 18:16:43,945 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 13 treesize of output 9 [2021-08-30 18:16:43,951 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 18:16:43,975 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 39 treesize of output 27 [2021-08-30 18:16:43,978 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 12 [2021-08-30 18:16:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:16:44,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:16:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:16:44,233 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:16:44,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895228283] [2021-08-30 18:16:44,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895228283] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:16:44,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:16:44,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-08-30 18:16:44,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454975452] [2021-08-30 18:16:44,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-30 18:16:44,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:16:44,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-30 18:16:44,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-30 18:16:44,235 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:45,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:16:45,207 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2021-08-30 18:16:45,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-30 18:16:45,207 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-08-30 18:16:45,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:16:45,208 INFO L225 Difference]: With dead ends: 99 [2021-08-30 18:16:45,208 INFO L226 Difference]: Without dead ends: 99 [2021-08-30 18:16:45,208 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 282.68ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-30 18:16:45,209 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 119 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 742.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.26ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 837.48ms IncrementalHoareTripleChecker+Time [2021-08-30 18:16:45,209 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 18 Invalid, 408 Unknown, 0 Unchecked, 3.26ms Time], IncrementalHoareTripleChecker [15 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 837.48ms Time] [2021-08-30 18:16:45,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-08-30 18:16:45,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 71. [2021-08-30 18:16:45,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 67 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:45,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2021-08-30 18:16:45,215 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 18 [2021-08-30 18:16:45,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:16:45,215 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2021-08-30 18:16:45,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:45,215 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2021-08-30 18:16:45,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-30 18:16:45,216 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:16:45,216 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:16:45,227 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 18:16:45,425 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 18:16:45,425 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-30 18:16:45,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:16:45,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1426802312, now seen corresponding path program 1 times [2021-08-30 18:16:45,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:16:45,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1972321407] [2021-08-30 18:16:45,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:16:45,426 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:16:45,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:16:45,427 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 18:16:45,428 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 18:16:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:16:45,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-30 18:16:45,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:16:45,531 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 18:16:45,553 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 23 treesize of output 19 [2021-08-30 18:16:45,571 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 13 [2021-08-30 18:16:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:16:45,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:16:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:16:45,649 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:16:45,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1972321407] [2021-08-30 18:16:45,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1972321407] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:16:45,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:16:45,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-08-30 18:16:45,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559030475] [2021-08-30 18:16:45,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 18:16:45,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:16:45,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 18:16:45,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 18:16:45,654 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:46,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:16:46,019 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2021-08-30 18:16:46,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 18:16:46,021 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-08-30 18:16:46,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:16:46,022 INFO L225 Difference]: With dead ends: 91 [2021-08-30 18:16:46,022 INFO L226 Difference]: Without dead ends: 91 [2021-08-30 18:16:46,022 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.38ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-30 18:16:46,023 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 65 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 271.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.49ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 320.33ms IncrementalHoareTripleChecker+Time [2021-08-30 18:16:46,023 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 15 Invalid, 273 Unknown, 0 Unchecked, 2.49ms Time], IncrementalHoareTripleChecker [11 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 320.33ms Time] [2021-08-30 18:16:46,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-30 18:16:46,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 65. [2021-08-30 18:16:46,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 61 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:46,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-08-30 18:16:46,035 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 18 [2021-08-30 18:16:46,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:16:46,035 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-08-30 18:16:46,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:46,037 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-08-30 18:16:46,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-30 18:16:46,037 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:16:46,038 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:16:46,049 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 18:16:46,247 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 18:16:46,247 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr24ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-30 18:16:46,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:16:46,248 INFO L82 PathProgramCache]: Analyzing trace with hash -985440585, now seen corresponding path program 1 times [2021-08-30 18:16:46,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:16:46,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1829077984] [2021-08-30 18:16:46,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:16:46,249 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:16:46,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:16:46,253 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 18:16:46,256 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 18:16:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:16:46,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-30 18:16:46,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:16:46,374 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 18:16:46,403 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 18:16:46,414 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 18:16:46,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:16:46,442 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 21 [2021-08-30 18:16:46,480 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 18:16:46,481 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:16:46,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1829077984] [2021-08-30 18:16:46,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1829077984] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:16:46,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:16:46,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-08-30 18:16:46,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788177318] [2021-08-30 18:16:46,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 18:16:46,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:16:46,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 18:16:46,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 18:16:46,483 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:46,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:16:46,835 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2021-08-30 18:16:46,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 18:16:46,836 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-08-30 18:16:46,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:16:46,836 INFO L225 Difference]: With dead ends: 107 [2021-08-30 18:16:46,836 INFO L226 Difference]: Without dead ends: 107 [2021-08-30 18:16:46,836 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.12ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-30 18:16:46,837 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 65 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 263.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.01ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 310.12ms IncrementalHoareTripleChecker+Time [2021-08-30 18:16:46,837 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 15 Invalid, 245 Unknown, 0 Unchecked, 2.01ms Time], IncrementalHoareTripleChecker [8 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 310.12ms Time] [2021-08-30 18:16:46,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-08-30 18:16:46,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 73. [2021-08-30 18:16:46,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 69 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:46,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2021-08-30 18:16:46,841 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 19 [2021-08-30 18:16:46,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:16:46,842 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2021-08-30 18:16:46,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:46,842 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2021-08-30 18:16:46,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-30 18:16:46,842 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:16:46,842 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 18:16:46,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-08-30 18:16:47,043 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 18:16:47,043 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-30 18:16:47,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:16:47,044 INFO L82 PathProgramCache]: Analyzing trace with hash -985388030, now seen corresponding path program 1 times [2021-08-30 18:16:47,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:16:47,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963823934] [2021-08-30 18:16:47,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:16:47,044 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:16:47,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:16:47,045 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 18:16:47,046 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 18:16:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 18:16:47,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-30 18:16:47,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 18:16:47,170 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 18:16:47,199 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 18:16:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:16:47,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 18:16:47,271 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 12 [2021-08-30 18:16:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 18:16:47,304 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-30 18:16:47,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963823934] [2021-08-30 18:16:47,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963823934] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-30 18:16:47,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-30 18:16:47,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-08-30 18:16:47,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111816748] [2021-08-30 18:16:47,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 18:16:47,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-30 18:16:47,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 18:16:47,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-30 18:16:47,307 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:47,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 18:16:47,844 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2021-08-30 18:16:47,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-30 18:16:47,845 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-08-30 18:16:47,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 18:16:47,846 INFO L225 Difference]: With dead ends: 135 [2021-08-30 18:16:47,846 INFO L226 Difference]: Without dead ends: 135 [2021-08-30 18:16:47,846 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 131.44ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-08-30 18:16:47,847 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 115 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 361.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.76ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 438.86ms IncrementalHoareTripleChecker+Time [2021-08-30 18:16:47,847 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 18 Invalid, 417 Unknown, 0 Unchecked, 2.76ms Time], IncrementalHoareTripleChecker [24 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 438.86ms Time] [2021-08-30 18:16:47,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-08-30 18:16:47,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 87. [2021-08-30 18:16:47,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 76 states have (on average 1.25) internal successors, (95), 83 states have internal predecessors, (95), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:47,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2021-08-30 18:16:47,859 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 19 [2021-08-30 18:16:47,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 18:16:47,860 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2021-08-30 18:16:47,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 18:16:47,860 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2021-08-30 18:16:47,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-30 18:16:47,861 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 18:16:47,861 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] [2021-08-30 18:16:47,869 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 18:16:48,061 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 18:16:48,062 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr25ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-30 18:16:48,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 18:16:48,062 INFO L82 PathProgramCache]: Analyzing trace with hash -483881938, now seen corresponding path program 1 times [2021-08-30 18:16:48,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-30 18:16:48,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420849166] [2021-08-30 18:16:48,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 18:16:48,063 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-30 18:16:48,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-30 18:16:48,064 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 18:16:48,066 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 18:16:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 18:16:48,147 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-30 18:16:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 18:16:48,222 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-08-30 18:16:48,223 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-30 18:16:48,224 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr25ENSURES_VIOLATIONMEMORY_LEAK (25 of 26 remaining) [2021-08-30 18:16:48,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION (24 of 26 remaining) [2021-08-30 18:16:48,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION (23 of 26 remaining) [2021-08-30 18:16:48,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION (22 of 26 remaining) [2021-08-30 18:16:48,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION (21 of 26 remaining) [2021-08-30 18:16:48,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION (20 of 26 remaining) [2021-08-30 18:16:48,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION (19 of 26 remaining) [2021-08-30 18:16:48,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION (18 of 26 remaining) [2021-08-30 18:16:48,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION (17 of 26 remaining) [2021-08-30 18:16:48,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION (16 of 26 remaining) [2021-08-30 18:16:48,227 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION (15 of 26 remaining) [2021-08-30 18:16:48,227 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION (14 of 26 remaining) [2021-08-30 18:16:48,227 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION (13 of 26 remaining) [2021-08-30 18:16:48,227 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION (12 of 26 remaining) [2021-08-30 18:16:48,227 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION (11 of 26 remaining) [2021-08-30 18:16:48,227 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION (10 of 26 remaining) [2021-08-30 18:16:48,227 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION (9 of 26 remaining) [2021-08-30 18:16:48,228 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION (8 of 26 remaining) [2021-08-30 18:16:48,228 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION (7 of 26 remaining) [2021-08-30 18:16:48,228 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION (6 of 26 remaining) [2021-08-30 18:16:48,228 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION (5 of 26 remaining) [2021-08-30 18:16:48,228 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION (4 of 26 remaining) [2021-08-30 18:16:48,228 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION (3 of 26 remaining) [2021-08-30 18:16:48,229 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION (2 of 26 remaining) [2021-08-30 18:16:48,229 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION (1 of 26 remaining) [2021-08-30 18:16:48,229 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24ASSERT_VIOLATIONMEMORY_LEAK (0 of 26 remaining) [2021-08-30 18:16:48,253 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 18:16:48,429 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 18:16:48,434 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 18:16:48,441 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-08-30 18:16:48,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 06:16:48 BoogieIcfgContainer [2021-08-30 18:16:48,452 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 18:16:48,452 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 18:16:48,453 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 18:16:48,453 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 18:16:48,453 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:16:37" (3/4) ... [2021-08-30 18:16:48,455 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-30 18:16:48,456 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 18:16:48,456 INFO L158 Benchmark]: Toolchain (without parser) took 11849.91ms. Allocated memory was 52.4MB in the beginning and 79.7MB in the end (delta: 27.3MB). Free memory was 28.3MB in the beginning and 48.3MB in the end (delta: -20.0MB). Peak memory consumption was 8.1MB. Max. memory is 16.1GB. [2021-08-30 18:16:48,456 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 52.4MB. Free memory is still 34.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 18:16:48,457 INFO L158 Benchmark]: CACSL2BoogieTranslator took 384.98ms. Allocated memory was 52.4MB in the beginning and 65.0MB in the end (delta: 12.6MB). Free memory was 28.1MB in the beginning and 41.4MB in the end (delta: -13.3MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. [2021-08-30 18:16:48,457 INFO L158 Benchmark]: Boogie Preprocessor took 54.75ms. Allocated memory is still 65.0MB. Free memory was 41.2MB in the beginning and 38.2MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 18:16:48,457 INFO L158 Benchmark]: RCFGBuilder took 507.82ms. Allocated memory is still 65.0MB. Free memory was 38.2MB in the beginning and 41.9MB in the end (delta: -3.7MB). Peak memory consumption was 12.8MB. Max. memory is 16.1GB. [2021-08-30 18:16:48,458 INFO L158 Benchmark]: TraceAbstraction took 10891.56ms. Allocated memory was 65.0MB in the beginning and 79.7MB in the end (delta: 14.7MB). Free memory was 41.4MB in the beginning and 49.0MB in the end (delta: -7.5MB). Peak memory consumption was 5.8MB. Max. memory is 16.1GB. [2021-08-30 18:16:48,458 INFO L158 Benchmark]: Witness Printer took 3.25ms. Allocated memory is still 79.7MB. Free memory is still 48.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 18:16:48,459 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 52.4MB. Free memory is still 34.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 384.98ms. Allocated memory was 52.4MB in the beginning and 65.0MB in the end (delta: 12.6MB). Free memory was 28.1MB in the beginning and 41.4MB in the end (delta: -13.3MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 54.75ms. Allocated memory is still 65.0MB. Free memory was 41.2MB in the beginning and 38.2MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 507.82ms. Allocated memory is still 65.0MB. Free memory was 38.2MB in the beginning and 41.9MB in the end (delta: -3.7MB). Peak memory consumption was 12.8MB. Max. memory is 16.1GB. * TraceAbstraction took 10891.56ms. Allocated memory was 65.0MB in the beginning and 79.7MB in the end (delta: 14.7MB). Free memory was 41.4MB in the beginning and 49.0MB in the end (delta: -7.5MB). Peak memory consumption was 5.8MB. Max. memory is 16.1GB. * Witness Printer took 3.25ms. Allocated memory is still 79.7MB. Free memory is still 48.3MB. 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: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) VAL [a={1:0}] [L534] List t; [L535] List p = a; VAL [a={1:0}, p={1:0}] [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 VAL [a={1:0}, p={1:0}] [L551] p = a VAL [a={1:0}, p={1:0}] [L552] EXPR p->h VAL [a={1:0}, p={1:0}, p->h=3] [L552] COND FALSE !(p->h == 1) [L554] EXPR p->h VAL [a={1:0}, p={1:0}, p->h=3] [L554] COND FALSE !(p->h == 2) [L556] EXPR p->h VAL [a={1:0}, p={1:0}, p->h=3] [L556] COND FALSE !(p->h != 3) [L558] return 0; VAL [\result=0, a={1:0}, p={1:0}] - 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. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: 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: 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: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: 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 all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 96 locations, 26 error locations. Started 1 CEGAR loops. OverallTime: 10815.17ms, OverallIterations: 10, TraceHistogramMax: 2, EmptinessCheckTime: 25.46ms, AutomataDifference: 5347.99ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 10.60ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1033 SdHoareTripleChecker+Valid, 4521.51ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1033 mSDsluCounter, 148 SdHoareTripleChecker+Invalid, 3867.01ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1104 mSDsCounter, 177 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2746 IncrementalHoareTripleChecker+Invalid, 2923 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 177 mSolverCounterUnsat, 32 mSDtfsCounter, 2746 mSolverCounterSat, 28.65ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 321 GetRequests, 234 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1151.99ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=9, InterpolantAutomatonStates: 75, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 75.75ms AutomataMinimizationTime, 9 MinimizatonAttempts, 275 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 80.17ms SsaConstructionTime, 208.47ms SatisfiabilityAnalysisTime, 2112.41ms InterpolantComputationTime, 165 NumberOfCodeBlocks, 165 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 272 ConstructedInterpolants, 0 QuantifiedInterpolants, 1240 SizeOfPredicates, 47 NumberOfNonLiveVariables, 753 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 18 InterpolantComputations, 18 PerfectInterpolantSequences, 16/16 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 18:16:48,495 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...