./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/verifythis/elimination_max_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 20ed64ec 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/verifythis/elimination_max_rec.c -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 7862960b0aa057ac19174563f251d134d1269c2b ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 05:14:56,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 05:14:56,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 05:14:56,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 05:14:56,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 05:14:56,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 05:14:56,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 05:14:56,458 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 05:14:56,462 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 05:14:56,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 05:14:56,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 05:14:56,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 05:14:56,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 05:14:56,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 05:14:56,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 05:14:56,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 05:14:56,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 05:14:56,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 05:14:56,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 05:14:56,483 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 05:14:56,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 05:14:56,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 05:14:56,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 05:14:56,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 05:14:56,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 05:14:56,490 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 05:14:56,490 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 05:14:56,500 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 05:14:56,500 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 05:14:56,501 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 05:14:56,501 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 05:14:56,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 05:14:56,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 05:14:56,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 05:14:56,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 05:14:56,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 05:14:56,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 05:14:56,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 05:14:56,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 05:14:56,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 05:14:56,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 05:14:56,507 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 05:14:56,534 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 05:14:56,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 05:14:56,535 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 05:14:56,535 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 05:14:56,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 05:14:56,537 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 05:14:56,537 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 05:14:56,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 05:14:56,537 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 05:14:56,537 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 05:14:56,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 05:14:56,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 05:14:56,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 05:14:56,538 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 05:14:56,538 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 05:14:56,538 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 05:14:56,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 05:14:56,539 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 05:14:56,539 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 05:14:56,539 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 05:14:56,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 05:14:56,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 05:14:56,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 05:14:56,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 05:14:56,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 05:14:56,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 05:14:56,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 05:14:56,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 05:14:56,540 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 05:14:56,540 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7862960b0aa057ac19174563f251d134d1269c2b [2021-08-27 05:14:56,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 05:14:56,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 05:14:56,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 05:14:56,798 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 05:14:56,798 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 05:14:56,799 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/elimination_max_rec.c [2021-08-27 05:14:56,866 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/693d348af/8e87771820994b05a498955c74a026c1/FLAG4f144b5ee [2021-08-27 05:14:57,235 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 05:14:57,236 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec.c [2021-08-27 05:14:57,240 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/693d348af/8e87771820994b05a498955c74a026c1/FLAG4f144b5ee [2021-08-27 05:14:57,254 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/693d348af/8e87771820994b05a498955c74a026c1 [2021-08-27 05:14:57,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 05:14:57,257 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 05:14:57,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 05:14:57,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 05:14:57,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 05:14:57,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:14:57" (1/1) ... [2021-08-27 05:14:57,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ea7ee74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:14:57, skipping insertion in model container [2021-08-27 05:14:57,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:14:57" (1/1) ... [2021-08-27 05:14:57,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 05:14:57,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 05:14:57,400 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/verifythis/elimination_max_rec.c[493,506] [2021-08-27 05:14:57,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 05:14:57,431 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 05:14:57,485 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/verifythis/elimination_max_rec.c[493,506] [2021-08-27 05:14:57,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 05:14:57,510 INFO L208 MainTranslator]: Completed translation [2021-08-27 05:14:57,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:14:57 WrapperNode [2021-08-27 05:14:57,511 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 05:14:57,513 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 05:14:57,513 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 05:14:57,513 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 05:14:57,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:14:57" (1/1) ... [2021-08-27 05:14:57,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:14:57" (1/1) ... [2021-08-27 05:14:57,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:14:57" (1/1) ... [2021-08-27 05:14:57,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:14:57" (1/1) ... [2021-08-27 05:14:57,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:14:57" (1/1) ... [2021-08-27 05:14:57,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:14:57" (1/1) ... [2021-08-27 05:14:57,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:14:57" (1/1) ... [2021-08-27 05:14:57,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 05:14:57,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 05:14:57,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 05:14:57,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 05:14:57,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:14:57" (1/1) ... [2021-08-27 05:14:57,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 05:14:57,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:14:57,592 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) [2021-08-27 05:14:57,599 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 [2021-08-27 05:14:57,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 05:14:57,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 05:14:57,636 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 05:14:57,636 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-08-27 05:14:57,636 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-08-27 05:14:57,637 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-08-27 05:14:57,637 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 05:14:57,637 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-08-27 05:14:57,637 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 05:14:57,638 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 05:14:57,638 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 05:14:57,638 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 05:14:57,638 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 05:14:57,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 05:14:57,638 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-08-27 05:14:57,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-08-27 05:14:57,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 05:14:57,639 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-08-27 05:14:57,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 05:14:57,639 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 05:14:57,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 05:14:57,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-08-27 05:14:57,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 05:14:57,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 05:14:57,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 05:14:57,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 05:14:57,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 05:14:58,028 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 05:14:58,029 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-27 05:14:58,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:14:58 BoogieIcfgContainer [2021-08-27 05:14:58,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 05:14:58,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 05:14:58,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 05:14:58,034 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 05:14:58,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 05:14:57" (1/3) ... [2021-08-27 05:14:58,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b89527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:14:58, skipping insertion in model container [2021-08-27 05:14:58,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:14:57" (2/3) ... [2021-08-27 05:14:58,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b89527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:14:58, skipping insertion in model container [2021-08-27 05:14:58,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:14:58" (3/3) ... [2021-08-27 05:14:58,038 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2021-08-27 05:14:58,041 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 05:14:58,042 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-08-27 05:14:58,078 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 05:14:58,082 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 [2021-08-27 05:14:58,083 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-08-27 05:14:58,092 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 46 states have internal predecessors, (50), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-27 05:14:58,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-27 05:14:58,096 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:14:58,097 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:14:58,097 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-08-27 05:14:58,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:14:58,101 INFO L82 PathProgramCache]: Analyzing trace with hash 2145046431, now seen corresponding path program 1 times [2021-08-27 05:14:58,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:14:58,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73005259] [2021-08-27 05:14:58,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:14:58,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:14:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:14:58,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:14:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:14:58,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:14:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:14:58,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:14:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:14:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:14:58,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:14:58,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73005259] [2021-08-27 05:14:58,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73005259] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:14:58,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:14:58,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 05:14:58,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137232394] [2021-08-27 05:14:58,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:14:58,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:14:58,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:14:58,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:14:58,265 INFO L87 Difference]: Start difference. First operand has 62 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 46 states have internal predecessors, (50), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 05:14:58,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:14:58,484 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-08-27 05:14:58,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 05:14:58,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-08-27 05:14:58,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:14:58,490 INFO L225 Difference]: With dead ends: 62 [2021-08-27 05:14:58,504 INFO L226 Difference]: Without dead ends: 59 [2021-08-27 05:14:58,506 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:14:58,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-27 05:14:58,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-08-27 05:14:58,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 32 states have (on average 1.4375) internal successors, (46), 44 states have internal predecessors, (46), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-08-27 05:14:58,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2021-08-27 05:14:58,557 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 24 [2021-08-27 05:14:58,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:14:58,558 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2021-08-27 05:14:58,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 05:14:58,558 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2021-08-27 05:14:58,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-27 05:14:58,559 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:14:58,559 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:14:58,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 05:14:58,560 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-08-27 05:14:58,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:14:58,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1123978077, now seen corresponding path program 1 times [2021-08-27 05:14:58,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:14:58,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234561875] [2021-08-27 05:14:58,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:14:58,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:14:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:14:58,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:14:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:14:58,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:14:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:14:58,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:14:58,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:14:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:14:58,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:14:58,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234561875] [2021-08-27 05:14:58,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234561875] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:14:58,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:14:58,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-27 05:14:58,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936495193] [2021-08-27 05:14:58,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 05:14:58,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:14:58,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 05:14:58,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-27 05:14:58,741 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 05:14:59,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:14:59,166 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2021-08-27 05:14:59,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 05:14:59,166 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-08-27 05:14:59,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:14:59,169 INFO L225 Difference]: With dead ends: 104 [2021-08-27 05:14:59,169 INFO L226 Difference]: Without dead ends: 104 [2021-08-27 05:14:59,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 188.7ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-08-27 05:14:59,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-27 05:14:59,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 82. [2021-08-27 05:14:59,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 48 states have (on average 1.5) internal successors, (72), 61 states have internal predecessors, (72), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-08-27 05:14:59,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2021-08-27 05:14:59,178 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 24 [2021-08-27 05:14:59,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:14:59,178 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2021-08-27 05:14:59,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 05:14:59,179 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2021-08-27 05:14:59,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-27 05:14:59,179 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:14:59,179 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:14:59,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 05:14:59,180 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_FREE === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-08-27 05:14:59,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:14:59,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1122354309, now seen corresponding path program 1 times [2021-08-27 05:14:59,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:14:59,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684904371] [2021-08-27 05:14:59,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:14:59,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:14:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:14:59,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:14:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:14:59,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:14:59,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:14:59,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:14:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:14:59,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 05:14:59,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:14:59,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:14:59,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:14:59,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684904371] [2021-08-27 05:14:59,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684904371] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:14:59,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:14:59,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 05:14:59,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964179871] [2021-08-27 05:14:59,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:14:59,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:14:59,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:14:59,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:14:59,260 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 05:14:59,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:14:59,438 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2021-08-27 05:14:59,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 05:14:59,441 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2021-08-27 05:14:59,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:14:59,442 INFO L225 Difference]: With dead ends: 81 [2021-08-27 05:14:59,442 INFO L226 Difference]: Without dead ends: 81 [2021-08-27 05:14:59,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:14:59,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-27 05:14:59,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-08-27 05:14:59,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 48 states have (on average 1.4791666666666667) internal successors, (71), 60 states have internal predecessors, (71), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-08-27 05:14:59,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2021-08-27 05:14:59,447 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 24 [2021-08-27 05:14:59,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:14:59,448 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2021-08-27 05:14:59,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 05:14:59,448 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2021-08-27 05:14:59,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-27 05:14:59,449 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:14:59,449 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:14:59,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 05:14:59,449 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1ASSERT_VIOLATIONMEMORY_FREE === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-08-27 05:14:59,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:14:59,450 INFO L82 PathProgramCache]: Analyzing trace with hash 433245261, now seen corresponding path program 1 times [2021-08-27 05:14:59,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:14:59,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594504309] [2021-08-27 05:14:59,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:14:59,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:14:59,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:14:59,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:14:59,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:14:59,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:14:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:14:59,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:14:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:14:59,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 05:14:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:14:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:14:59,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:14:59,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594504309] [2021-08-27 05:14:59,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594504309] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:14:59,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:14:59,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 05:14:59,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961328329] [2021-08-27 05:14:59,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:14:59,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:14:59,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:14:59,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:14:59,522 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 05:14:59,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:14:59,690 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2021-08-27 05:14:59,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 05:14:59,690 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2021-08-27 05:14:59,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:14:59,691 INFO L225 Difference]: With dead ends: 80 [2021-08-27 05:14:59,691 INFO L226 Difference]: Without dead ends: 80 [2021-08-27 05:14:59,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:14:59,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-27 05:14:59,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-08-27 05:14:59,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 59 states have internal predecessors, (70), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-08-27 05:14:59,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2021-08-27 05:14:59,697 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 25 [2021-08-27 05:14:59,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:14:59,697 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2021-08-27 05:14:59,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 05:14:59,697 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2021-08-27 05:14:59,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-27 05:14:59,698 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:14:59,698 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:14:59,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 05:14:59,698 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2ASSERT_VIOLATIONMEMORY_FREE === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-08-27 05:14:59,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:14:59,699 INFO L82 PathProgramCache]: Analyzing trace with hash 545701255, now seen corresponding path program 1 times [2021-08-27 05:14:59,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:14:59,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313195299] [2021-08-27 05:14:59,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:14:59,699 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:14:59,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:14:59,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:14:59,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:14:59,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:14:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:14:59,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:14:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:14:59,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 05:14:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:14:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:14:59,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:14:59,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313195299] [2021-08-27 05:14:59,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313195299] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:14:59,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:14:59,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 05:14:59,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739781812] [2021-08-27 05:14:59,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:14:59,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:14:59,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:14:59,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:14:59,767 INFO L87 Difference]: Start difference. First operand 80 states and 97 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 05:14:59,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:14:59,918 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2021-08-27 05:14:59,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 05:14:59,918 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2021-08-27 05:14:59,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:14:59,919 INFO L225 Difference]: With dead ends: 79 [2021-08-27 05:14:59,919 INFO L226 Difference]: Without dead ends: 79 [2021-08-27 05:14:59,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:14:59,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-27 05:14:59,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-08-27 05:14:59,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 48 states have (on average 1.4375) internal successors, (69), 58 states have internal predecessors, (69), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-08-27 05:14:59,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2021-08-27 05:14:59,924 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 26 [2021-08-27 05:14:59,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:14:59,924 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2021-08-27 05:14:59,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 05:14:59,924 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2021-08-27 05:14:59,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-27 05:14:59,925 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:14:59,925 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:14:59,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 05:14:59,925 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-08-27 05:14:59,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:14:59,926 INFO L82 PathProgramCache]: Analyzing trace with hash 869775126, now seen corresponding path program 1 times [2021-08-27 05:14:59,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:14:59,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831436822] [2021-08-27 05:14:59,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:14:59,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:14:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:14:59,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:14:59,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:14:59,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:14:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:14:59,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:14:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:00,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-27 05:15:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:15:00,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:00,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831436822] [2021-08-27 05:15:00,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831436822] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:15:00,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:15:00,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 05:15:00,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057812227] [2021-08-27 05:15:00,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 05:15:00,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:00,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 05:15:00,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-27 05:15:00,008 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 05:15:00,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:00,231 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2021-08-27 05:15:00,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 05:15:00,231 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2021-08-27 05:15:00,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:00,232 INFO L225 Difference]: With dead ends: 75 [2021-08-27 05:15:00,232 INFO L226 Difference]: Without dead ends: 75 [2021-08-27 05:15:00,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-27 05:15:00,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-27 05:15:00,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-08-27 05:15:00,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 54 states have internal predecessors, (61), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-08-27 05:15:00,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2021-08-27 05:15:00,237 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 27 [2021-08-27 05:15:00,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:00,237 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2021-08-27 05:15:00,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 05:15:00,237 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2021-08-27 05:15:00,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-27 05:15:00,238 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:00,238 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:15:00,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 05:15:00,238 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr1REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-08-27 05:15:00,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:00,239 INFO L82 PathProgramCache]: Analyzing trace with hash 869775127, now seen corresponding path program 1 times [2021-08-27 05:15:00,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:00,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383626566] [2021-08-27 05:15:00,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:00,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:00,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:00,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:00,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:00,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:00,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-27 05:15:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:15:00,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:00,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383626566] [2021-08-27 05:15:00,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383626566] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:15:00,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:15:00,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-27 05:15:00,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483944674] [2021-08-27 05:15:00,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 05:15:00,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:00,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 05:15:00,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:15:00,381 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 05:15:00,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:00,844 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2021-08-27 05:15:00,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 05:15:00,845 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2021-08-27 05:15:00,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:00,846 INFO L225 Difference]: With dead ends: 92 [2021-08-27 05:15:00,846 INFO L226 Difference]: Without dead ends: 92 [2021-08-27 05:15:00,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 194.6ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-08-27 05:15:00,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-27 05:15:00,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 75. [2021-08-27 05:15:00,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 48 states have (on average 1.25) internal successors, (60), 54 states have internal predecessors, (60), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-08-27 05:15:00,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2021-08-27 05:15:00,857 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 27 [2021-08-27 05:15:00,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:00,857 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2021-08-27 05:15:00,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 05:15:00,857 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2021-08-27 05:15:00,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-27 05:15:00,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:00,873 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:15:00,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 05:15:00,874 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr3ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-08-27 05:15:00,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:00,874 INFO L82 PathProgramCache]: Analyzing trace with hash -263130224, now seen corresponding path program 1 times [2021-08-27 05:15:00,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:00,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182722726] [2021-08-27 05:15:00,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:00,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:00,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:00,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:00,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:00,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:00,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 05:15:00,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:15:00,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:00,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182722726] [2021-08-27 05:15:00,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182722726] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:15:00,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:15:00,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 05:15:00,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138856892] [2021-08-27 05:15:00,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 05:15:00,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:00,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 05:15:00,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-27 05:15:00,987 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 05:15:01,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:01,214 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2021-08-27 05:15:01,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 05:15:01,215 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 27 [2021-08-27 05:15:01,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:01,216 INFO L225 Difference]: With dead ends: 74 [2021-08-27 05:15:01,216 INFO L226 Difference]: Without dead ends: 69 [2021-08-27 05:15:01,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-27 05:15:01,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-27 05:15:01,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-08-27 05:15:01,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 49 states have internal predecessors, (55), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-08-27 05:15:01,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2021-08-27 05:15:01,230 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 27 [2021-08-27 05:15:01,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:01,230 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2021-08-27 05:15:01,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 05:15:01,230 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2021-08-27 05:15:01,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-27 05:15:01,231 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:01,231 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:15:01,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-27 05:15:01,232 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr3REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-08-27 05:15:01,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:01,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1193225136, now seen corresponding path program 1 times [2021-08-27 05:15:01,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:01,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142253148] [2021-08-27 05:15:01,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:01,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:01,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:01,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:01,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:01,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:01,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:01,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-27 05:15:01,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:15:01,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:01,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142253148] [2021-08-27 05:15:01,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142253148] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:15:01,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:15:01,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-27 05:15:01,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940704490] [2021-08-27 05:15:01,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 05:15:01,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:01,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 05:15:01,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-27 05:15:01,461 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 05:15:01,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:01,992 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2021-08-27 05:15:01,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 05:15:01,993 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-08-27 05:15:01,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:01,994 INFO L225 Difference]: With dead ends: 83 [2021-08-27 05:15:01,994 INFO L226 Difference]: Without dead ends: 83 [2021-08-27 05:15:01,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 263.3ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-08-27 05:15:01,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-27 05:15:01,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 69. [2021-08-27 05:15:01,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 43 states have (on average 1.255813953488372) internal successors, (54), 49 states have internal predecessors, (54), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-08-27 05:15:01,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2021-08-27 05:15:01,997 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 28 [2021-08-27 05:15:01,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:01,998 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2021-08-27 05:15:01,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 05:15:01,998 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2021-08-27 05:15:01,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-27 05:15:01,999 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:01,999 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:15:01,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-27 05:15:01,999 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-08-27 05:15:01,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:02,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1954320756, now seen corresponding path program 1 times [2021-08-27 05:15:02,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:02,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432032307] [2021-08-27 05:15:02,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:02,000 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:02,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:02,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:02,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:02,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:02,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-27 05:15:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:15:02,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:02,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432032307] [2021-08-27 05:15:02,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432032307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:15:02,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141464919] [2021-08-27 05:15:02,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:02,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:15:02,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:15:02,131 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:15:02,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-27 05:15:02,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:02,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-27 05:15:02,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:15:02,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:15:02,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141464919] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:15:02,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 05:15:02,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 14 [2021-08-27 05:15:02,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414432304] [2021-08-27 05:15:02,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 05:15:02,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:02,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 05:15:02,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-27 05:15:02,422 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 05:15:02,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:02,564 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2021-08-27 05:15:02,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 05:15:02,565 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2021-08-27 05:15:02,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:02,565 INFO L225 Difference]: With dead ends: 87 [2021-08-27 05:15:02,565 INFO L226 Difference]: Without dead ends: 87 [2021-08-27 05:15:02,566 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 151.4ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-27 05:15:02,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-08-27 05:15:02,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2021-08-27 05:15:02,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 52 states have internal predecessors, (57), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-08-27 05:15:02,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2021-08-27 05:15:02,569 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 36 [2021-08-27 05:15:02,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:02,569 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2021-08-27 05:15:02,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 05:15:02,569 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2021-08-27 05:15:02,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-27 05:15:02,570 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:02,570 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:15:02,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-27 05:15:02,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-27 05:15:02,788 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr1REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-08-27 05:15:02,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:02,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1410945416, now seen corresponding path program 1 times [2021-08-27 05:15:02,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:02,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770263491] [2021-08-27 05:15:02,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:02,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:02,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:02,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:02,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:02,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:02,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-27 05:15:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:02,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-08-27 05:15:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-27 05:15:02,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:02,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770263491] [2021-08-27 05:15:02,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770263491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:15:02,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224151615] [2021-08-27 05:15:02,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:02,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:15:02,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:15:02,970 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:15:03,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-27 05:15:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:03,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-27 05:15:03,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:15:03,146 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 8 treesize of output 7 [2021-08-27 05:15:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:15:04,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224151615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:15:04,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:15:04,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-27 05:15:04,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846056824] [2021-08-27 05:15:04,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-27 05:15:04,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:04,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-27 05:15:04,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=363, Unknown=1, NotChecked=0, Total=420 [2021-08-27 05:15:04,139 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 21 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 15 states have internal predecessors, (44), 11 states have call successors, (14), 9 states have call predecessors, (14), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-08-27 05:15:05,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:05,905 INFO L93 Difference]: Finished difference Result 137 states and 155 transitions. [2021-08-27 05:15:05,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-27 05:15:05,906 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 15 states have internal predecessors, (44), 11 states have call successors, (14), 9 states have call predecessors, (14), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 39 [2021-08-27 05:15:05,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:05,907 INFO L225 Difference]: With dead ends: 137 [2021-08-27 05:15:05,907 INFO L226 Difference]: Without dead ends: 137 [2021-08-27 05:15:05,907 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1409.3ms TimeCoverageRelationStatistics Valid=257, Invalid=1148, Unknown=1, NotChecked=0, Total=1406 [2021-08-27 05:15:05,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-27 05:15:05,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 94. [2021-08-27 05:15:05,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 67 states have internal predecessors, (76), 16 states have call successors, (16), 12 states have call predecessors, (16), 12 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2021-08-27 05:15:05,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2021-08-27 05:15:05,911 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 39 [2021-08-27 05:15:05,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:05,912 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2021-08-27 05:15:05,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 15 states have internal predecessors, (44), 11 states have call successors, (14), 9 states have call predecessors, (14), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-08-27 05:15:05,912 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2021-08-27 05:15:05,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-27 05:15:05,913 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:05,913 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:15:05,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-27 05:15:06,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-27 05:15:06,121 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr3REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-08-27 05:15:06,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:06,121 INFO L82 PathProgramCache]: Analyzing trace with hash 789634911, now seen corresponding path program 1 times [2021-08-27 05:15:06,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:06,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494744210] [2021-08-27 05:15:06,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:06,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:06,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:06,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:06,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:06,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:06,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:06,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-27 05:15:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:06,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-08-27 05:15:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:06,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-27 05:15:06,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:06,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494744210] [2021-08-27 05:15:06,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494744210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:15:06,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459447567] [2021-08-27 05:15:06,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:06,305 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:15:06,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:15:06,306 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:15:06,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-27 05:15:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:06,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-27 05:15:06,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:15:06,463 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 8 treesize of output 7 [2021-08-27 05:15:07,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:15:07,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459447567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:15:07,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:15:07,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-27 05:15:07,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777941688] [2021-08-27 05:15:07,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-27 05:15:07,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:07,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-27 05:15:07,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-08-27 05:15:07,055 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 21 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 15 states have internal predecessors, (46), 11 states have call successors, (14), 9 states have call predecessors, (14), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-08-27 05:15:08,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:08,547 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2021-08-27 05:15:08,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-27 05:15:08,548 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 15 states have internal predecessors, (46), 11 states have call successors, (14), 9 states have call predecessors, (14), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 40 [2021-08-27 05:15:08,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:08,549 INFO L225 Difference]: With dead ends: 136 [2021-08-27 05:15:08,549 INFO L226 Difference]: Without dead ends: 136 [2021-08-27 05:15:08,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1033.2ms TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2021-08-27 05:15:08,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-08-27 05:15:08,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 93. [2021-08-27 05:15:08,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 66 states have internal predecessors, (75), 16 states have call successors, (16), 12 states have call predecessors, (16), 12 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2021-08-27 05:15:08,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2021-08-27 05:15:08,554 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 40 [2021-08-27 05:15:08,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:08,554 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2021-08-27 05:15:08,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 15 states have internal predecessors, (46), 11 states have call successors, (14), 9 states have call predecessors, (14), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-08-27 05:15:08,555 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2021-08-27 05:15:08,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-27 05:15:08,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:08,555 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:15:08,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-27 05:15:08,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:15:08,773 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr5REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-08-27 05:15:08,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:08,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1158711008, now seen corresponding path program 1 times [2021-08-27 05:15:08,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:08,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920838877] [2021-08-27 05:15:08,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:08,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:08,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:08,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:08,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:08,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:08,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-27 05:15:08,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:08,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-08-27 05:15:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:08,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-08-27 05:15:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:08,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:15:08,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:08,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920838877] [2021-08-27 05:15:08,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920838877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:15:08,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028651331] [2021-08-27 05:15:08,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:08,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:15:08,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:15:08,989 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:15:09,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-27 05:15:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:09,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-27 05:15:09,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:15:09,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:15:09,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028651331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:15:09,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:15:09,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-27 05:15:09,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044050363] [2021-08-27 05:15:09,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-27 05:15:09,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:09,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-27 05:15:09,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-08-27 05:15:09,478 INFO L87 Difference]: Start difference. First operand 93 states and 107 transitions. Second operand has 20 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 14 states have internal predecessors, (39), 9 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2021-08-27 05:15:10,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:10,711 INFO L93 Difference]: Finished difference Result 130 states and 152 transitions. [2021-08-27 05:15:10,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-27 05:15:10,711 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 14 states have internal predecessors, (39), 9 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) Word has length 41 [2021-08-27 05:15:10,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:10,712 INFO L225 Difference]: With dead ends: 130 [2021-08-27 05:15:10,712 INFO L226 Difference]: Without dead ends: 130 [2021-08-27 05:15:10,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 954.8ms TimeCoverageRelationStatistics Valid=284, Invalid=1276, Unknown=0, NotChecked=0, Total=1560 [2021-08-27 05:15:10,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-08-27 05:15:10,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 94. [2021-08-27 05:15:10,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 67 states have internal predecessors, (73), 16 states have call successors, (16), 12 states have call predecessors, (16), 13 states have return successors, (17), 14 states have call predecessors, (17), 14 states have call successors, (17) [2021-08-27 05:15:10,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 106 transitions. [2021-08-27 05:15:10,717 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 106 transitions. Word has length 41 [2021-08-27 05:15:10,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:10,717 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 106 transitions. [2021-08-27 05:15:10,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 14 states have internal predecessors, (39), 9 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2021-08-27 05:15:10,717 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 106 transitions. [2021-08-27 05:15:10,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-27 05:15:10,718 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:10,718 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:15:10,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-27 05:15:10,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:15:10,933 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr7REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-08-27 05:15:10,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:10,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1124748705, now seen corresponding path program 1 times [2021-08-27 05:15:10,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:10,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757233168] [2021-08-27 05:15:10,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:10,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:11,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:11,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:11,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:11,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:11,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-27 05:15:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:11,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-08-27 05:15:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:11,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-08-27 05:15:11,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-27 05:15:11,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:11,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757233168] [2021-08-27 05:15:11,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757233168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:15:11,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547418026] [2021-08-27 05:15:11,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:11,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:15:11,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:15:11,168 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:15:11,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-27 05:15:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:11,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-27 05:15:11,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:15:11,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:15:11,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547418026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:15:11,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:15:11,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-08-27 05:15:11,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320976961] [2021-08-27 05:15:11,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-27 05:15:11,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:11,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-27 05:15:11,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-08-27 05:15:11,953 INFO L87 Difference]: Start difference. First operand 94 states and 106 transitions. Second operand has 27 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 11 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-08-27 05:15:14,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:14,688 INFO L93 Difference]: Finished difference Result 152 states and 177 transitions. [2021-08-27 05:15:14,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-27 05:15:14,688 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 11 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 43 [2021-08-27 05:15:14,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:14,689 INFO L225 Difference]: With dead ends: 152 [2021-08-27 05:15:14,690 INFO L226 Difference]: Without dead ends: 150 [2021-08-27 05:15:14,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2101.7ms TimeCoverageRelationStatistics Valid=505, Invalid=2575, Unknown=0, NotChecked=0, Total=3080 [2021-08-27 05:15:14,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-08-27 05:15:14,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 107. [2021-08-27 05:15:14,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 73 states have (on average 1.1369863013698631) internal successors, (83), 75 states have internal predecessors, (83), 19 states have call successors, (19), 13 states have call predecessors, (19), 13 states have return successors, (21), 18 states have call predecessors, (21), 17 states have call successors, (21) [2021-08-27 05:15:14,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 123 transitions. [2021-08-27 05:15:14,695 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 123 transitions. Word has length 43 [2021-08-27 05:15:14,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:14,695 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 123 transitions. [2021-08-27 05:15:14,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 11 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-08-27 05:15:14,696 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 123 transitions. [2021-08-27 05:15:14,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-27 05:15:14,696 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:14,696 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:15:14,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-27 05:15:14,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-27 05:15:14,914 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting checkErr7REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-08-27 05:15:14,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:14,914 INFO L82 PathProgramCache]: Analyzing trace with hash -155114973, now seen corresponding path program 1 times [2021-08-27 05:15:14,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:14,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102360065] [2021-08-27 05:15:14,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:14,915 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:14,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:15,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:15,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:15,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:15,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:15,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-27 05:15:15,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:15,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-08-27 05:15:15,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:15,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-08-27 05:15:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:15,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-27 05:15:15,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:15,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102360065] [2021-08-27 05:15:15,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102360065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:15:15,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045817047] [2021-08-27 05:15:15,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:15,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:15:15,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:15:15,089 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:15:15,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-27 05:15:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:15,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-27 05:15:15,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:15:15,323 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 7 treesize of output 6 [2021-08-27 05:15:17,419 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_11 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_11))) is different from true [2021-08-27 05:15:17,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-27 05:15:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:15:17,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045817047] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:15:17,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 05:15:17,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 21 [2021-08-27 05:15:17,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667581923] [2021-08-27 05:15:17,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 05:15:17,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:17,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 05:15:17,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=342, Unknown=1, NotChecked=36, Total=420 [2021-08-27 05:15:17,585 INFO L87 Difference]: Start difference. First operand 107 states and 123 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-08-27 05:15:17,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:17,718 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2021-08-27 05:15:17,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 05:15:17,719 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2021-08-27 05:15:17,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:17,720 INFO L225 Difference]: With dead ends: 98 [2021-08-27 05:15:17,720 INFO L226 Difference]: Without dead ends: 90 [2021-08-27 05:15:17,722 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2259.5ms TimeCoverageRelationStatistics Valid=54, Invalid=455, Unknown=1, NotChecked=42, Total=552 [2021-08-27 05:15:17,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-27 05:15:17,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-08-27 05:15:17,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 63 states have internal predecessors, (67), 16 states have call successors, (16), 12 states have call predecessors, (16), 10 states have return successors, (14), 14 states have call predecessors, (14), 12 states have call successors, (14) [2021-08-27 05:15:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2021-08-27 05:15:17,729 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 43 [2021-08-27 05:15:17,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:17,730 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2021-08-27 05:15:17,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-08-27 05:15:17,730 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2021-08-27 05:15:17,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-27 05:15:17,730 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:17,731 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:15:17,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-27 05:15:17,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-27 05:15:17,945 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-08-27 05:15:17,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:17,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1965960192, now seen corresponding path program 1 times [2021-08-27 05:15:17,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:17,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699059993] [2021-08-27 05:15:17,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:17,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:18,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:18,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:18,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:18,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:18,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-27 05:15:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:18,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-08-27 05:15:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:18,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-08-27 05:15:18,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-27 05:15:18,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:18,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699059993] [2021-08-27 05:15:18,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699059993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:15:18,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689183095] [2021-08-27 05:15:18,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:18,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:15:18,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:15:18,128 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:15:18,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-27 05:15:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:18,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-27 05:15:18,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:15:18,379 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 7 treesize of output 6 [2021-08-27 05:15:20,406 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_12 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_12))) is different from true [2021-08-27 05:15:22,458 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_13 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_13))) is different from true [2021-08-27 05:15:24,499 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_14 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_14))) is different from true [2021-08-27 05:15:24,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-27 05:15:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-08-27 05:15:24,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689183095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:15:24,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:15:24,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-08-27 05:15:24,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35302955] [2021-08-27 05:15:24,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-27 05:15:24,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:24,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-27 05:15:24,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=415, Unknown=3, NotChecked=126, Total=600 [2021-08-27 05:15:24,715 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 25 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 19 states have internal predecessors, (48), 6 states have call successors, (15), 9 states have call predecessors, (15), 5 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-08-27 05:15:39,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:39,591 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2021-08-27 05:15:39,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 05:15:39,592 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 19 states have internal predecessors, (48), 6 states have call successors, (15), 9 states have call predecessors, (15), 5 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 48 [2021-08-27 05:15:39,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:39,593 INFO L225 Difference]: With dead ends: 92 [2021-08-27 05:15:39,593 INFO L226 Difference]: Without dead ends: 75 [2021-08-27 05:15:39,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 20763.0ms TimeCoverageRelationStatistics Valid=172, Invalid=1023, Unknown=7, NotChecked=204, Total=1406 [2021-08-27 05:15:39,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-27 05:15:39,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-08-27 05:15:39,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 51 states have internal predecessors, (54), 13 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2021-08-27 05:15:39,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2021-08-27 05:15:39,607 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 48 [2021-08-27 05:15:39,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:39,608 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2021-08-27 05:15:39,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 19 states have internal predecessors, (48), 6 states have call successors, (15), 9 states have call predecessors, (15), 5 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-08-27 05:15:39,608 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2021-08-27 05:15:39,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-08-27 05:15:39,608 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:39,609 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:15:39,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-27 05:15:39,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:15:39,826 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting checkErr7REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-08-27 05:15:39,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:39,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1804090799, now seen corresponding path program 1 times [2021-08-27 05:15:39,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:39,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074177171] [2021-08-27 05:15:39,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:39,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:40,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:40,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:40,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:40,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:40,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-27 05:15:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:40,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-08-27 05:15:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:40,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-08-27 05:15:40,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:40,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-08-27 05:15:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:40,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-27 05:15:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:40,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-08-27 05:15:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:40,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 05:15:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:40,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-08-27 05:15:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:40,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-08-27 05:15:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-08-27 05:15:40,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:40,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074177171] [2021-08-27 05:15:40,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074177171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:15:40,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251479149] [2021-08-27 05:15:40,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:40,346 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:15:40,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:15:40,361 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:15:40,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-27 05:15:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:40,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-27 05:15:40,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:15:41,698 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 32 proven. 38 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-27 05:15:41,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251479149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:15:41,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:15:41,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-08-27 05:15:41,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622351052] [2021-08-27 05:15:41,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-27 05:15:41,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:41,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-27 05:15:41,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1505, Unknown=0, NotChecked=0, Total=1640 [2021-08-27 05:15:41,700 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 41 states, 34 states have (on average 2.588235294117647) internal successors, (88), 30 states have internal predecessors, (88), 20 states have call successors, (28), 10 states have call predecessors, (28), 5 states have return successors, (20), 17 states have call predecessors, (20), 18 states have call successors, (20) [2021-08-27 05:15:45,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:45,958 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2021-08-27 05:15:45,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-27 05:15:45,958 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 34 states have (on average 2.588235294117647) internal successors, (88), 30 states have internal predecessors, (88), 20 states have call successors, (28), 10 states have call predecessors, (28), 5 states have return successors, (20), 17 states have call predecessors, (20), 18 states have call successors, (20) Word has length 97 [2021-08-27 05:15:45,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:45,959 INFO L225 Difference]: With dead ends: 132 [2021-08-27 05:15:45,959 INFO L226 Difference]: Without dead ends: 132 [2021-08-27 05:15:45,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 3952.5ms TimeCoverageRelationStatistics Valid=891, Invalid=5271, Unknown=0, NotChecked=0, Total=6162 [2021-08-27 05:15:45,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-08-27 05:15:45,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 121. [2021-08-27 05:15:45,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (25), 23 states have call predecessors, (25), 20 states have call successors, (25) [2021-08-27 05:15:45,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2021-08-27 05:15:45,964 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 97 [2021-08-27 05:15:45,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:45,964 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2021-08-27 05:15:45,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 34 states have (on average 2.588235294117647) internal successors, (88), 30 states have internal predecessors, (88), 20 states have call successors, (28), 10 states have call predecessors, (28), 5 states have return successors, (20), 17 states have call predecessors, (20), 18 states have call successors, (20) [2021-08-27 05:15:45,964 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2021-08-27 05:15:45,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-08-27 05:15:45,965 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:45,965 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:15:45,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-27 05:15:46,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-27 05:15:46,181 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting checkErr7REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 9 more)] === [2021-08-27 05:15:46,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:46,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1689044429, now seen corresponding path program 2 times [2021-08-27 05:15:46,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:46,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124017771] [2021-08-27 05:15:46,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:46,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:46,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:46,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:46,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:46,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:46,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:46,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-08-27 05:15:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:46,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-08-27 05:15:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:46,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-27 05:15:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:46,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-08-27 05:15:46,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:46,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 05:15:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:46,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-08-27 05:15:46,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:46,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-08-27 05:15:46,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-08-27 05:15:46,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:46,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124017771] [2021-08-27 05:15:46,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124017771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:15:46,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270694420] [2021-08-27 05:15:46,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 05:15:46,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:15:46,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:15:46,550 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:15:46,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-27 05:15:46,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 05:15:46,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:15:46,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-27 05:15:46,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:15:46,883 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 8 treesize of output 7 [2021-08-27 05:15:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-08-27 05:15:48,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270694420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:15:48,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:15:48,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-08-27 05:15:48,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131083898] [2021-08-27 05:15:48,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-27 05:15:48,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:48,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-27 05:15:48,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1161, Unknown=0, NotChecked=0, Total=1260 [2021-08-27 05:15:48,071 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand has 36 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 states have internal predecessors, (78), 17 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (18), 15 states have call predecessors, (18), 15 states have call successors, (18) [2021-08-27 05:15:51,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:51,061 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2021-08-27 05:15:51,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-27 05:15:51,062 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 states have internal predecessors, (78), 17 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (18), 15 states have call predecessors, (18), 15 states have call successors, (18) Word has length 73 [2021-08-27 05:15:51,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:51,062 INFO L225 Difference]: With dead ends: 133 [2021-08-27 05:15:51,062 INFO L226 Difference]: Without dead ends: 0 [2021-08-27 05:15:51,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 3001.6ms TimeCoverageRelationStatistics Valid=491, Invalid=3049, Unknown=0, NotChecked=0, Total=3540 [2021-08-27 05:15:51,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-27 05:15:51,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-27 05:15:51,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 05:15:51,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 05:15:51,063 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2021-08-27 05:15:51,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:51,063 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 05:15:51,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 states have internal predecessors, (78), 17 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (18), 15 states have call predecessors, (18), 15 states have call successors, (18) [2021-08-27 05:15:51,063 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-27 05:15:51,063 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-27 05:15:51,065 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:15:51,065 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:15:51,065 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:15:51,065 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 05:15:51,065 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr0REQUIRES_VIOLATION [2021-08-27 05:15:51,065 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr1REQUIRES_VIOLATION [2021-08-27 05:15:51,065 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr2REQUIRES_VIOLATION [2021-08-27 05:15:51,065 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr3REQUIRES_VIOLATION [2021-08-27 05:15:51,065 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr4REQUIRES_VIOLATION [2021-08-27 05:15:51,066 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr5REQUIRES_VIOLATION [2021-08-27 05:15:51,066 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr6REQUIRES_VIOLATION [2021-08-27 05:15:51,066 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr7REQUIRES_VIOLATION [2021-08-27 05:15:51,066 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 05:15:51,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-27 05:15:51,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-27 05:15:51,276 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 05:15:51,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 05:15:51 BoogieIcfgContainer [2021-08-27 05:15:51,277 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 05:15:51,277 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 05:15:51,277 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 05:15:51,278 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 05:15:51,278 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:14:58" (3/4) ... [2021-08-27 05:15:51,281 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-27 05:15:51,285 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-08-27 05:15:51,285 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-27 05:15:51,285 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-08-27 05:15:51,285 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-27 05:15:51,285 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-08-27 05:15:51,285 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2021-08-27 05:15:51,285 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure #Ultimate.meminit [2021-08-27 05:15:51,287 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-08-27 05:15:51,288 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-08-27 05:15:51,288 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-27 05:15:51,288 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 05:15:51,331 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 05:15:51,331 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 05:15:51,332 INFO L168 Benchmark]: Toolchain (without parser) took 54074.27 ms. Allocated memory was 81.8 MB in the beginning and 293.6 MB in the end (delta: 211.8 MB). Free memory was 58.3 MB in the beginning and 255.2 MB in the end (delta: -196.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-08-27 05:15:51,333 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 54.5 MB. Free memory was 35.0 MB in the beginning and 35.0 MB in the end (delta: 43.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 05:15:51,335 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.17 ms. Allocated memory is still 81.8 MB. Free memory was 58.0 MB in the beginning and 64.4 MB in the end (delta: -6.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 05:15:51,335 INFO L168 Benchmark]: Boogie Preprocessor took 46.22 ms. Allocated memory is still 81.8 MB. Free memory was 64.4 MB in the beginning and 62.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 05:15:51,335 INFO L168 Benchmark]: RCFGBuilder took 471.29 ms. Allocated memory is still 81.8 MB. Free memory was 62.8 MB in the beginning and 63.2 MB in the end (delta: -442.6 kB). Peak memory consumption was 22.3 MB. Max. memory is 16.1 GB. [2021-08-27 05:15:51,336 INFO L168 Benchmark]: TraceAbstraction took 53244.71 ms. Allocated memory was 81.8 MB in the beginning and 293.6 MB in the end (delta: 211.8 MB). Free memory was 62.7 MB in the beginning and 258.5 MB in the end (delta: -195.8 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.1 GB. [2021-08-27 05:15:51,336 INFO L168 Benchmark]: Witness Printer took 53.76 ms. Allocated memory is still 293.6 MB. Free memory was 258.5 MB in the beginning and 255.2 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 05:15:51,337 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 54.5 MB. Free memory was 35.0 MB in the beginning and 35.0 MB in the end (delta: 43.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 252.17 ms. Allocated memory is still 81.8 MB. Free memory was 58.0 MB in the beginning and 64.4 MB in the end (delta: -6.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.22 ms. Allocated memory is still 81.8 MB. Free memory was 64.4 MB in the beginning and 62.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 471.29 ms. Allocated memory is still 81.8 MB. Free memory was 62.8 MB in the beginning and 63.2 MB in the end (delta: -442.6 kB). Peak memory consumption was 22.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 53244.71 ms. Allocated memory was 81.8 MB in the beginning and 293.6 MB in the end (delta: 211.8 MB). Free memory was 62.7 MB in the beginning and 258.5 MB in the end (delta: -195.8 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.1 GB. * Witness Printer took 53.76 ms. Allocated memory is still 293.6 MB. Free memory was 258.5 MB in the beginning and 255.2 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 41]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 34]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 34]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 65 locations, 13 error locations. Started 1 CEGAR loops. OverallTime: 53199.3ms, OverallIterations: 18, TraceHistogramMax: 5, EmptinessCheckTime: 32.6ms, AutomataDifference: 32297.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 753 SDtfs, 2879 SDslu, 1597 SDs, 0 SdLazy, 10491 SolverSat, 1922 SolverUnsat, 18 SolverUnknown, 0 SolverNotchecked, 6064.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1018 GetRequests, 536 SyntacticMatches, 25 SemanticMatches, 457 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 3199 ImplicationChecksByTransitivity, 36698.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=121occurred in iteration=17, InterpolantAutomatonStates: 290, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 130.7ms AutomataMinimizationTime, 18 MinimizatonAttempts, 243 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 104.2ms SsaConstructionTime, 429.7ms SatisfiabilityAnalysisTime, 16591.8ms InterpolantComputationTime, 1152 NumberOfCodeBlocks, 1152 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1125 ConstructedInterpolants, 101 QuantifiedInterpolants, 6935 SizeOfPredicates, 83 NumberOfNonLiveVariables, 2254 ConjunctsInSsa, 234 ConjunctsInUnsatCore, 27 InterpolantComputations, 11 PerfectInterpolantSequences, 255/416 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 - AllSpecificationsHoldResult: All specifications hold 13 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-27 05:15:51,365 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...