./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD --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 3a80fea07b3dad363ac033c87feb8bfcf28a57d2e75bc95b67f90908b133efe1 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:27:13,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:27:13,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:27:13,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:27:13,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:27:13,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:27:13,590 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:27:13,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:27:13,597 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:27:13,598 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:27:13,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:27:13,602 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:27:13,603 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:27:13,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:27:13,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:27:13,610 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:27:13,612 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:27:13,613 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:27:13,617 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:27:13,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:27:13,623 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:27:13,625 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:27:13,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:27:13,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:27:13,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:27:13,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:27:13,636 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:27:13,637 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:27:13,638 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:27:13,640 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:27:13,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:27:13,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:27:13,644 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:27:13,645 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:27:13,647 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:27:13,648 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:27:13,649 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:27:13,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:27:13,651 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:27:13,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:27:13,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:27:13,655 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 23:27:13,693 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:27:13,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:27:13,694 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:27:13,695 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:27:13,696 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:27:13,697 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:27:13,698 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:27:13,698 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:27:13,699 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:27:13,699 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 23:27:13,700 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:27:13,701 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:27:13,701 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:27:13,702 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 23:27:13,702 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 23:27:13,703 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 23:27:13,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:27:13,704 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 23:27:13,704 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:27:13,705 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:27:13,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:27:13,706 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:27:13,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:27:13,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:27:13,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:27:13,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:27:13,708 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:27:13,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:27:13,708 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:27:13,709 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a80fea07b3dad363ac033c87feb8bfcf28a57d2e75bc95b67f90908b133efe1 [2021-10-28 23:27:14,100 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:27:14,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:27:14,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:27:14,134 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:27:14,135 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:27:14,137 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2021-10-28 23:27:14,227 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/data/6169a4bb0/972ad5912c7c43b590d7ba2ae435c03e/FLAGafb0b43f0 [2021-10-28 23:27:14,873 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:27:14,874 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2021-10-28 23:27:14,883 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/data/6169a4bb0/972ad5912c7c43b590d7ba2ae435c03e/FLAGafb0b43f0 [2021-10-28 23:27:15,245 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/data/6169a4bb0/972ad5912c7c43b590d7ba2ae435c03e [2021-10-28 23:27:15,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:27:15,252 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 23:27:15,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:27:15,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:27:15,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:27:15,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:27:15" (1/1) ... [2021-10-28 23:27:15,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@546dc2b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:15, skipping insertion in model container [2021-10-28 23:27:15,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:27:15" (1/1) ... [2021-10-28 23:27:15,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:27:15,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:27:15,576 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c[502,515] [2021-10-28 23:27:15,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:27:15,635 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:27:15,657 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c[502,515] [2021-10-28 23:27:15,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:27:15,707 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:27:15,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:15 WrapperNode [2021-10-28 23:27:15,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:27:15,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:27:15,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:27:15,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:27:15,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:15" (1/1) ... [2021-10-28 23:27:15,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:15" (1/1) ... [2021-10-28 23:27:15,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:15" (1/1) ... [2021-10-28 23:27:15,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:15" (1/1) ... [2021-10-28 23:27:15,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:15" (1/1) ... [2021-10-28 23:27:15,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:15" (1/1) ... [2021-10-28 23:27:15,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:15" (1/1) ... [2021-10-28 23:27:15,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:27:15,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:27:15,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:27:15,794 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:27:15,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:15" (1/1) ... [2021-10-28 23:27:15,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:27:15,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:15,839 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:15,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:27:15,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 23:27:15,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:27:15,907 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 23:27:15,907 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-10-28 23:27:15,907 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-10-28 23:27:15,909 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-10-28 23:27:15,909 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 23:27:15,909 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-10-28 23:27:15,910 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 23:27:15,911 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 23:27:15,911 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 23:27:15,912 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 23:27:15,912 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 23:27:15,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:27:15,912 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-10-28 23:27:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-10-28 23:27:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 23:27:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-10-28 23:27:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 23:27:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 23:27:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 23:27:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-10-28 23:27:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 23:27:15,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 23:27:15,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:27:15,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:27:15,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 23:27:16,470 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:27:16,471 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-10-28 23:27:16,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:27:16 BoogieIcfgContainer [2021-10-28 23:27:16,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:27:16,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:27:16,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:27:16,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:27:16,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:27:15" (1/3) ... [2021-10-28 23:27:16,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c48617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:27:16, skipping insertion in model container [2021-10-28 23:27:16,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:15" (2/3) ... [2021-10-28 23:27:16,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c48617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:27:16, skipping insertion in model container [2021-10-28 23:27:16,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:27:16" (3/3) ... [2021-10-28 23:27:16,485 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c [2021-10-28 23:27:16,492 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:27:16,492 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2021-10-28 23:27:16,551 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:27:16,560 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 23:27:16,560 INFO L340 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2021-10-28 23:27:16,581 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 55 states have internal predecessors, (59), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-10-28 23:27:16,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-28 23:27:16,592 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:16,593 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 23:27:16,594 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-28 23:27:16,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:16,601 INFO L85 PathProgramCache]: Analyzing trace with hash -404481820, now seen corresponding path program 1 times [2021-10-28 23:27:16,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:16,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568944371] [2021-10-28 23:27:16,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:16,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:16,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:17,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:27:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:17,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 23:27:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:17,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 23:27:17,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 23:27:17,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:17,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568944371] [2021-10-28 23:27:17,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568944371] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:17,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:17,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:27:17,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394888837] [2021-10-28 23:27:17,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:27:17,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:17,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:27:17,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:27:17,124 INFO L87 Difference]: Start difference. First operand has 73 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 55 states have internal predecessors, (59), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 23:27:17,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:17,528 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2021-10-28 23:27:17,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:27:17,530 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-10-28 23:27:17,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:17,540 INFO L225 Difference]: With dead ends: 73 [2021-10-28 23:27:17,541 INFO L226 Difference]: Without dead ends: 70 [2021-10-28 23:27:17,543 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:27:17,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-28 23:27:17,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-10-28 23:27:17,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 53 states have internal predecessors, (55), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-10-28 23:27:17,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-10-28 23:27:17,594 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 30 [2021-10-28 23:27:17,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:17,595 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-10-28 23:27:17,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 23:27:17,595 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-10-28 23:27:17,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-28 23:27:17,598 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:17,598 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 23:27:17,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:27:17,599 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-28 23:27:17,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:17,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1206695456, now seen corresponding path program 1 times [2021-10-28 23:27:17,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:17,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161842449] [2021-10-28 23:27:17,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:17,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:17,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:17,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:27:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:17,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 23:27:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:17,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 23:27:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 23:27:17,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:17,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161842449] [2021-10-28 23:27:17,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161842449] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:17,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:17,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 23:27:17,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825951788] [2021-10-28 23:27:17,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:27:17,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:17,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:27:17,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:27:17,903 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 23:27:18,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:18,822 INFO L93 Difference]: Finished difference Result 114 states and 127 transitions. [2021-10-28 23:27:18,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:27:18,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2021-10-28 23:27:18,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:18,829 INFO L225 Difference]: With dead ends: 114 [2021-10-28 23:27:18,830 INFO L226 Difference]: Without dead ends: 114 [2021-10-28 23:27:18,831 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:27:18,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-28 23:27:18,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 93. [2021-10-28 23:27:18,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 53 states have (on average 1.528301886792453) internal successors, (81), 70 states have internal predecessors, (81), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-10-28 23:27:18,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2021-10-28 23:27:18,852 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 30 [2021-10-28 23:27:18,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:18,852 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2021-10-28 23:27:18,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 23:27:18,853 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2021-10-28 23:27:18,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-28 23:27:18,855 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:18,855 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 23:27:18,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 23:27:18,856 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-28 23:27:18,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:18,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1208436753, now seen corresponding path program 1 times [2021-10-28 23:27:18,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:18,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292537131] [2021-10-28 23:27:18,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:18,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:19,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:19,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:27:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:19,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 23:27:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:19,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 23:27:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:19,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-28 23:27:19,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:19,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 23:27:19,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:19,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292537131] [2021-10-28 23:27:19,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292537131] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:19,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:19,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:27:19,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657974336] [2021-10-28 23:27:19,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:27:19,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:19,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:27:19,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:27:19,077 INFO L87 Difference]: Start difference. First operand 93 states and 112 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, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 23:27:19,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:19,417 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2021-10-28 23:27:19,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:27:19,418 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, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 30 [2021-10-28 23:27:19,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:19,420 INFO L225 Difference]: With dead ends: 90 [2021-10-28 23:27:19,420 INFO L226 Difference]: Without dead ends: 90 [2021-10-28 23:27:19,421 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:27:19,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-28 23:27:19,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-10-28 23:27:19,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 53 states have (on average 1.471698113207547) internal successors, (78), 67 states have internal predecessors, (78), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-10-28 23:27:19,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 109 transitions. [2021-10-28 23:27:19,435 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 109 transitions. Word has length 30 [2021-10-28 23:27:19,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:19,435 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 109 transitions. [2021-10-28 23:27:19,436 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, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 23:27:19,436 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 109 transitions. [2021-10-28 23:27:19,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-28 23:27:19,437 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:19,438 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 23:27:19,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 23:27:19,438 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-28 23:27:19,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:19,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1208436752, now seen corresponding path program 1 times [2021-10-28 23:27:19,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:19,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631148028] [2021-10-28 23:27:19,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:19,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:19,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:19,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:19,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:27:19,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:19,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 23:27:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:19,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 23:27:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:19,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-28 23:27:19,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:19,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:27:19,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:19,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631148028] [2021-10-28 23:27:19,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631148028] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:19,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:19,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 23:27:19,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313344328] [2021-10-28 23:27:19,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:27:19,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:19,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:27:19,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:27:19,790 INFO L87 Difference]: Start difference. First operand 90 states and 109 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 23:27:20,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:20,380 INFO L93 Difference]: Finished difference Result 88 states and 107 transitions. [2021-10-28 23:27:20,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:27:20,381 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 30 [2021-10-28 23:27:20,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:20,383 INFO L225 Difference]: With dead ends: 88 [2021-10-28 23:27:20,383 INFO L226 Difference]: Without dead ends: 88 [2021-10-28 23:27:20,383 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:27:20,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-28 23:27:20,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-10-28 23:27:20,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 53 states have (on average 1.4339622641509433) internal successors, (76), 65 states have internal predecessors, (76), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-10-28 23:27:20,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2021-10-28 23:27:20,395 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 30 [2021-10-28 23:27:20,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:20,395 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2021-10-28 23:27:20,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 23:27:20,396 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2021-10-28 23:27:20,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-28 23:27:20,397 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:20,397 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 23:27:20,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 23:27:20,398 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-28 23:27:20,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:20,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1666549967, now seen corresponding path program 1 times [2021-10-28 23:27:20,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:20,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218279689] [2021-10-28 23:27:20,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:20,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:20,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:20,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:20,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:27:20,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:20,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 23:27:20,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:20,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 23:27:20,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:20,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-28 23:27:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 23:27:20,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:20,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218279689] [2021-10-28 23:27:20,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218279689] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:20,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:20,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 23:27:20,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311536200] [2021-10-28 23:27:20,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 23:27:20,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:20,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 23:27:20,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:27:20,744 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand has 11 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 23:27:21,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:21,515 INFO L93 Difference]: Finished difference Result 127 states and 159 transitions. [2021-10-28 23:27:21,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:27:21,516 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2021-10-28 23:27:21,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:21,522 INFO L225 Difference]: With dead ends: 127 [2021-10-28 23:27:21,523 INFO L226 Difference]: Without dead ends: 127 [2021-10-28 23:27:21,524 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:27:21,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-28 23:27:21,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 94. [2021-10-28 23:27:21,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 58 states have (on average 1.396551724137931) internal successors, (81), 70 states have internal predecessors, (81), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2021-10-28 23:27:21,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 114 transitions. [2021-10-28 23:27:21,562 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 114 transitions. Word has length 32 [2021-10-28 23:27:21,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:21,563 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 114 transitions. [2021-10-28 23:27:21,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 23:27:21,563 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 114 transitions. [2021-10-28 23:27:21,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-28 23:27:21,565 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:21,565 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 23:27:21,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 23:27:21,569 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-28 23:27:21,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:21,570 INFO L85 PathProgramCache]: Analyzing trace with hash 538307480, now seen corresponding path program 1 times [2021-10-28 23:27:21,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:21,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347084570] [2021-10-28 23:27:21,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:21,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:21,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:21,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:27:21,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:21,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 23:27:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:21,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 23:27:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:21,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-28 23:27:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:21,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 23:27:21,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:21,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347084570] [2021-10-28 23:27:21,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347084570] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:21,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:21,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-28 23:27:21,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792404369] [2021-10-28 23:27:21,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 23:27:21,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:21,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 23:27:21,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:27:21,932 INFO L87 Difference]: Start difference. First operand 94 states and 114 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 23:27:22,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:22,837 INFO L93 Difference]: Finished difference Result 98 states and 117 transitions. [2021-10-28 23:27:22,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 23:27:22,838 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-10-28 23:27:22,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:22,840 INFO L225 Difference]: With dead ends: 98 [2021-10-28 23:27:22,840 INFO L226 Difference]: Without dead ends: 98 [2021-10-28 23:27:22,841 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-10-28 23:27:22,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-28 23:27:22,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-10-28 23:27:22,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 73 states have internal predecessors, (84), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2021-10-28 23:27:22,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 117 transitions. [2021-10-28 23:27:22,853 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 117 transitions. Word has length 37 [2021-10-28 23:27:22,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:22,854 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 117 transitions. [2021-10-28 23:27:22,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 23:27:22,854 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 117 transitions. [2021-10-28 23:27:22,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-28 23:27:22,856 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:22,857 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-10-28 23:27:22,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 23:27:22,857 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-28 23:27:22,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:22,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1956778269, now seen corresponding path program 1 times [2021-10-28 23:27:22,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:22,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553311565] [2021-10-28 23:27:22,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:22,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:22,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:22,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:22,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:27:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:22,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 23:27:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:22,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 23:27:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:22,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-28 23:27:22,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:22,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 23:27:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:22,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-28 23:27:22,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:22,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553311565] [2021-10-28 23:27:22,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553311565] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:22,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:22,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 23:27:22,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553917686] [2021-10-28 23:27:22,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:27:22,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:22,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:27:22,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:27:22,992 INFO L87 Difference]: Start difference. First operand 98 states and 117 transitions. Second operand has 8 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 23:27:23,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:23,395 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2021-10-28 23:27:23,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:27:23,402 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2021-10-28 23:27:23,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:23,404 INFO L225 Difference]: With dead ends: 94 [2021-10-28 23:27:23,404 INFO L226 Difference]: Without dead ends: 94 [2021-10-28 23:27:23,404 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:27:23,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-28 23:27:23,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-10-28 23:27:23,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 69 states have internal predecessors, (76), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2021-10-28 23:27:23,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2021-10-28 23:27:23,433 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 38 [2021-10-28 23:27:23,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:23,434 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2021-10-28 23:27:23,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 23:27:23,434 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2021-10-28 23:27:23,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-28 23:27:23,436 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:23,436 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-10-28 23:27:23,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 23:27:23,437 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-28 23:27:23,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:23,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1956778268, now seen corresponding path program 1 times [2021-10-28 23:27:23,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:23,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923512307] [2021-10-28 23:27:23,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:23,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:23,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:23,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:27:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:23,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 23:27:23,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:23,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 23:27:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:23,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-28 23:27:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:23,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 23:27:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-28 23:27:23,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:23,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923512307] [2021-10-28 23:27:23,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923512307] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:23,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:23,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 23:27:23,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550834710] [2021-10-28 23:27:23,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:27:23,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:23,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:27:23,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:27:23,654 INFO L87 Difference]: Start difference. First operand 94 states and 109 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 23:27:24,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:24,411 INFO L93 Difference]: Finished difference Result 108 states and 121 transitions. [2021-10-28 23:27:24,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:27:24,412 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2021-10-28 23:27:24,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:24,414 INFO L225 Difference]: With dead ends: 108 [2021-10-28 23:27:24,414 INFO L226 Difference]: Without dead ends: 108 [2021-10-28 23:27:24,415 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:27:24,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-28 23:27:24,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2021-10-28 23:27:24,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 69 states have internal predecessors, (75), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2021-10-28 23:27:24,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2021-10-28 23:27:24,426 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 38 [2021-10-28 23:27:24,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:24,426 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2021-10-28 23:27:24,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 23:27:24,427 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2021-10-28 23:27:24,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 23:27:24,439 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:24,440 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-10-28 23:27:24,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 23:27:24,440 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-28 23:27:24,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:24,441 INFO L85 PathProgramCache]: Analyzing trace with hash -530584177, now seen corresponding path program 1 times [2021-10-28 23:27:24,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:24,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589118289] [2021-10-28 23:27:24,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:24,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:24,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:24,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:27:24,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:24,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 23:27:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:24,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 23:27:24,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:24,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-28 23:27:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:24,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 23:27:24,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-28 23:27:24,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:24,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589118289] [2021-10-28 23:27:24,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589118289] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:24,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:24,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 23:27:24,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989403633] [2021-10-28 23:27:24,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:27:24,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:24,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:27:24,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:27:24,760 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 23:27:25,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:25,554 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2021-10-28 23:27:25,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:27:25,554 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2021-10-28 23:27:25,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:25,556 INFO L225 Difference]: With dead ends: 107 [2021-10-28 23:27:25,556 INFO L226 Difference]: Without dead ends: 107 [2021-10-28 23:27:25,557 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:27:25,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-28 23:27:25,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 94. [2021-10-28 23:27:25,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 69 states have internal predecessors, (74), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2021-10-28 23:27:25,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2021-10-28 23:27:25,566 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 39 [2021-10-28 23:27:25,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:25,566 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2021-10-28 23:27:25,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 23:27:25,567 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2021-10-28 23:27:25,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 23:27:25,568 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:25,568 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 23:27:25,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 23:27:25,568 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr5ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-28 23:27:25,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:25,570 INFO L85 PathProgramCache]: Analyzing trace with hash -685811321, now seen corresponding path program 1 times [2021-10-28 23:27:25,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:25,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183584401] [2021-10-28 23:27:25,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:25,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:25,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:25,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:25,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:27:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:25,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 23:27:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:25,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 23:27:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:25,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-28 23:27:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:25,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-10-28 23:27:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 23:27:25,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:25,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183584401] [2021-10-28 23:27:25,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183584401] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:25,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:25,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:27:25,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595622769] [2021-10-28 23:27:25,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:27:25,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:25,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:27:25,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:27:25,682 INFO L87 Difference]: Start difference. First operand 94 states and 107 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 23:27:25,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:25,945 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2021-10-28 23:27:25,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:27:25,946 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2021-10-28 23:27:25,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:25,947 INFO L225 Difference]: With dead ends: 93 [2021-10-28 23:27:25,947 INFO L226 Difference]: Without dead ends: 93 [2021-10-28 23:27:25,948 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:27:25,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-10-28 23:27:25,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-10-28 23:27:25,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 68 states have internal predecessors, (73), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2021-10-28 23:27:25,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2021-10-28 23:27:25,956 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 40 [2021-10-28 23:27:25,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:25,956 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2021-10-28 23:27:25,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 23:27:25,957 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2021-10-28 23:27:25,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-28 23:27:25,958 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:25,959 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 23:27:25,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 23:27:25,959 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr7ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-28 23:27:25,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:25,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1934681174, now seen corresponding path program 1 times [2021-10-28 23:27:25,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:25,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866758776] [2021-10-28 23:27:25,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:25,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:26,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:26,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:27:26,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:26,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 23:27:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:26,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 23:27:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:26,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-28 23:27:26,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:26,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-10-28 23:27:26,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 23:27:26,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:26,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866758776] [2021-10-28 23:27:26,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866758776] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:26,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:26,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 23:27:26,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821968320] [2021-10-28 23:27:26,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:27:26,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:26,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:27:26,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:27:26,085 INFO L87 Difference]: Start difference. First operand 93 states and 106 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 23:27:26,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:26,350 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2021-10-28 23:27:26,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:27:26,351 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2021-10-28 23:27:26,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:26,353 INFO L225 Difference]: With dead ends: 92 [2021-10-28 23:27:26,353 INFO L226 Difference]: Without dead ends: 78 [2021-10-28 23:27:26,353 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:27:26,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-28 23:27:26,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-10-28 23:27:26,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 56 states have internal predecessors, (60), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-10-28 23:27:26,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2021-10-28 23:27:26,360 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 42 [2021-10-28 23:27:26,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:26,360 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2021-10-28 23:27:26,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 23:27:26,361 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2021-10-28 23:27:26,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 23:27:26,362 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:26,362 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-10-28 23:27:26,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 23:27:26,363 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-28 23:27:26,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:26,364 INFO L85 PathProgramCache]: Analyzing trace with hash 424622284, now seen corresponding path program 1 times [2021-10-28 23:27:26,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:26,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149537036] [2021-10-28 23:27:26,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:26,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:26,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:26,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:27:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:26,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 23:27:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:26,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 23:27:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:26,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-28 23:27:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:26,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 23:27:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-28 23:27:26,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:26,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149537036] [2021-10-28 23:27:26,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149537036] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:26,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764509369] [2021-10-28 23:27:26,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:26,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:26,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:26,557 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:27:26,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:27:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:26,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 23:27:26,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:27,133 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-28 23:27:27,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764509369] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:27,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:27:27,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 14 [2021-10-28 23:27:27,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074362777] [2021-10-28 23:27:27,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:27:27,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:27,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:27:27,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:27:27,137 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 23:27:27,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:27,351 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2021-10-28 23:27:27,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:27:27,352 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2021-10-28 23:27:27,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:27,353 INFO L225 Difference]: With dead ends: 95 [2021-10-28 23:27:27,353 INFO L226 Difference]: Without dead ends: 95 [2021-10-28 23:27:27,354 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:27:27,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-28 23:27:27,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2021-10-28 23:27:27,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 59 states have internal predecessors, (63), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-10-28 23:27:27,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2021-10-28 23:27:27,360 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 47 [2021-10-28 23:27:27,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:27,361 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2021-10-28 23:27:27,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 23:27:27,362 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2021-10-28 23:27:27,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 23:27:27,363 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:27,363 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-10-28 23:27:27,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:27,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:27,578 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-28 23:27:27,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:27,578 INFO L85 PathProgramCache]: Analyzing trace with hash 422889924, now seen corresponding path program 1 times [2021-10-28 23:27:27,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:27,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031020656] [2021-10-28 23:27:27,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:27,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:27,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:27,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:27:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:27,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 23:27:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:27,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 23:27:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:27,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-28 23:27:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:27,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 23:27:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:27,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-28 23:27:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:27,858 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 23:27:27,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:27,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031020656] [2021-10-28 23:27:27,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031020656] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:27,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547424541] [2021-10-28 23:27:27,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:27,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:27,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:27,862 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:27:27,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:27:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:28,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 23:27:28,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 23:27:28,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547424541] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:28,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:27:28,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-10-28 23:27:28,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402576111] [2021-10-28 23:27:28,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 23:27:28,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:28,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 23:27:28,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:27:28,916 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand has 19 states, 16 states have (on average 2.6875) internal successors, (43), 13 states have internal predecessors, (43), 9 states have call successors, (15), 6 states have call predecessors, (15), 3 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2021-10-28 23:27:30,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:30,647 INFO L93 Difference]: Finished difference Result 146 states and 175 transitions. [2021-10-28 23:27:30,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 23:27:30,647 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.6875) internal successors, (43), 13 states have internal predecessors, (43), 9 states have call successors, (15), 6 states have call predecessors, (15), 3 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) Word has length 47 [2021-10-28 23:27:30,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:30,649 INFO L225 Difference]: With dead ends: 146 [2021-10-28 23:27:30,649 INFO L226 Difference]: Without dead ends: 144 [2021-10-28 23:27:30,650 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 23:27:30,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-28 23:27:30,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 118. [2021-10-28 23:27:30,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.2337662337662338) internal successors, (95), 85 states have internal predecessors, (95), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2021-10-28 23:27:30,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 144 transitions. [2021-10-28 23:27:30,666 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 144 transitions. Word has length 47 [2021-10-28 23:27:30,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:30,668 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 144 transitions. [2021-10-28 23:27:30,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.6875) internal successors, (43), 13 states have internal predecessors, (43), 9 states have call successors, (15), 6 states have call predecessors, (15), 3 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2021-10-28 23:27:30,668 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 144 transitions. [2021-10-28 23:27:30,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-28 23:27:30,671 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:30,671 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-10-28 23:27:30,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:30,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 23:27:30,886 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-28 23:27:30,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:30,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1624676123, now seen corresponding path program 1 times [2021-10-28 23:27:30,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:30,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760346449] [2021-10-28 23:27:30,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:30,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:31,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:31,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:27:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:31,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 23:27:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:31,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 23:27:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:31,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-28 23:27:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:31,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 23:27:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:31,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-28 23:27:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:31,214 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-28 23:27:31,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:31,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760346449] [2021-10-28 23:27:31,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760346449] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:31,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893849557] [2021-10-28 23:27:31,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:31,219 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:31,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:31,220 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:27:31,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:27:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:31,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 23:27:31,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:32,237 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-28 23:27:32,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893849557] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:32,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:27:32,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-10-28 23:27:32,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945488544] [2021-10-28 23:27:32,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 23:27:32,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:32,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 23:27:32,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-10-28 23:27:32,241 INFO L87 Difference]: Start difference. First operand 118 states and 144 transitions. Second operand has 27 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 9 states have call successors, (15), 6 states have call predecessors, (15), 3 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-10-28 23:27:35,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:35,906 INFO L93 Difference]: Finished difference Result 213 states and 261 transitions. [2021-10-28 23:27:35,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-28 23:27:35,908 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 9 states have call successors, (15), 6 states have call predecessors, (15), 3 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 49 [2021-10-28 23:27:35,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:35,911 INFO L225 Difference]: With dead ends: 213 [2021-10-28 23:27:35,911 INFO L226 Difference]: Without dead ends: 213 [2021-10-28 23:27:35,913 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=499, Invalid=2581, Unknown=0, NotChecked=0, Total=3080 [2021-10-28 23:27:35,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-10-28 23:27:35,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 147. [2021-10-28 23:27:35,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 101 states have (on average 1.198019801980198) internal successors, (121), 108 states have internal predecessors, (121), 26 states have call successors, (26), 13 states have call predecessors, (26), 14 states have return successors, (31), 25 states have call predecessors, (31), 25 states have call successors, (31) [2021-10-28 23:27:35,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 178 transitions. [2021-10-28 23:27:35,930 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 178 transitions. Word has length 49 [2021-10-28 23:27:35,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:35,931 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 178 transitions. [2021-10-28 23:27:35,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 9 states have call successors, (15), 6 states have call predecessors, (15), 3 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-10-28 23:27:35,931 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 178 transitions. [2021-10-28 23:27:35,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-28 23:27:35,932 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:35,933 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-10-28 23:27:35,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:36,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 23:27:36,162 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting checkErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-28 23:27:36,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:36,162 INFO L85 PathProgramCache]: Analyzing trace with hash -2017703133, now seen corresponding path program 1 times [2021-10-28 23:27:36,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:36,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131981122] [2021-10-28 23:27:36,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:36,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:36,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:36,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:27:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:36,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 23:27:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:36,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 23:27:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:36,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-28 23:27:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:36,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 23:27:36,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:36,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-28 23:27:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:36,362 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-28 23:27:36,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:36,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131981122] [2021-10-28 23:27:36,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131981122] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:36,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356375080] [2021-10-28 23:27:36,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:36,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:36,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:36,365 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:27:36,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:27:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:36,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 23:27:36,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:36,638 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 [2021-10-28 23:27:38,694 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_3 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_3))) is different from true [2021-10-28 23:27:40,781 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_4 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_4))) is different from true [2021-10-28 23:27:40,884 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 [2021-10-28 23:27:40,946 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 23:27:40,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356375080] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:40,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:27:40,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 16 [2021-10-28 23:27:40,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832018507] [2021-10-28 23:27:40,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 23:27:40,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:40,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 23:27:40,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=155, Unknown=2, NotChecked=50, Total=240 [2021-10-28 23:27:40,949 INFO L87 Difference]: Start difference. First operand 147 states and 178 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 23:27:41,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:41,122 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-10-28 23:27:41,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:27:41,123 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 49 [2021-10-28 23:27:41,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:27:41,124 INFO L225 Difference]: With dead ends: 96 [2021-10-28 23:27:41,124 INFO L226 Difference]: Without dead ends: 96 [2021-10-28 23:27:41,125 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=48, Invalid=230, Unknown=2, NotChecked=62, Total=342 [2021-10-28 23:27:41,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-28 23:27:41,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-10-28 23:27:41,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 69 states have internal predecessors, (72), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2021-10-28 23:27:41,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2021-10-28 23:27:41,131 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 49 [2021-10-28 23:27:41,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:27:41,132 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2021-10-28 23:27:41,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 23:27:41,132 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2021-10-28 23:27:41,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-28 23:27:41,133 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:27:41,133 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1] [2021-10-28 23:27:41,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:41,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 23:27:41,334 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-28 23:27:41,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:41,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1905730051, now seen corresponding path program 1 times [2021-10-28 23:27:41,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:41,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461128282] [2021-10-28 23:27:41,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:41,335 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:41,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:27:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:41,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:27:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:41,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 23:27:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:41,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 23:27:41,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:41,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-28 23:27:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:41,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 23:27:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:41,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-28 23:27:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:41,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-28 23:27:41,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:41,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461128282] [2021-10-28 23:27:41,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461128282] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:41,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589447905] [2021-10-28 23:27:41,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:41,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:27:41,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:41,735 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:27:41,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 23:27:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:41,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 23:27:41,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:42,019 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 [2021-10-28 23:27:44,063 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_5 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_5))) is different from true [2021-10-28 23:27:46,113 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_6 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_6))) is different from true [2021-10-28 23:27:48,174 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_7 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_7))) is different from true [2021-10-28 23:27:48,315 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 [2021-10-28 23:27:48,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 4 not checked. [2021-10-28 23:27:48,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589447905] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:27:48,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:27:48,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-10-28 23:27:48,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995116695] [2021-10-28 23:27:48,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-28 23:27:48,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:48,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-28 23:27:48,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=415, Unknown=3, NotChecked=126, Total=600 [2021-10-28 23:27:48,532 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 25 states, 22 states have (on average 2.227272727272727) internal successors, (49), 19 states have internal predecessors, (49), 5 states have call successors, (16), 9 states have call predecessors, (16), 5 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-10-28 23:28:03,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:28:03,673 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2021-10-28 23:28:03,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 23:28:03,674 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.227272727272727) internal successors, (49), 19 states have internal predecessors, (49), 5 states have call successors, (16), 9 states have call predecessors, (16), 5 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 54 [2021-10-28 23:28:03,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:28:03,676 INFO L225 Difference]: With dead ends: 94 [2021-10-28 23:28:03,676 INFO L226 Difference]: Without dead ends: 94 [2021-10-28 23:28:03,677 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=172, Invalid=1023, Unknown=7, NotChecked=204, Total=1406 [2021-10-28 23:28:03,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-28 23:28:03,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-10-28 23:28:03,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 67 states have internal predecessors, (70), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2021-10-28 23:28:03,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2021-10-28 23:28:03,682 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 54 [2021-10-28 23:28:03,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:28:03,682 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2021-10-28 23:28:03,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.227272727272727) internal successors, (49), 19 states have internal predecessors, (49), 5 states have call successors, (16), 9 states have call predecessors, (16), 5 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-10-28 23:28:03,683 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2021-10-28 23:28:03,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 23:28:03,683 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:28:03,684 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1] [2021-10-28 23:28:03,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:28:03,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 23:28:03,910 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting checkErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-28 23:28:03,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:28:03,910 INFO L85 PathProgramCache]: Analyzing trace with hash -807259696, now seen corresponding path program 1 times [2021-10-28 23:28:03,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:28:03,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526192899] [2021-10-28 23:28:03,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:28:03,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:28:03,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:04,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:28:04,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:04,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:28:04,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:04,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 23:28:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:04,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 23:28:04,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:04,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-28 23:28:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:04,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 23:28:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:04,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-10-28 23:28:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:04,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-10-28 23:28:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 23:28:04,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:28:04,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526192899] [2021-10-28 23:28:04,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526192899] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:28:04,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279903557] [2021-10-28 23:28:04,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:28:04,203 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:28:04,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:28:04,204 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:28:04,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 23:28:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:04,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-28 23:28:04,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:28:04,510 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 [2021-10-28 23:28:06,248 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 23:28:06,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279903557] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:28:06,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:28:06,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-10-28 23:28:06,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453286475] [2021-10-28 23:28:06,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 23:28:06,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:28:06,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 23:28:06,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=258, Unknown=1, NotChecked=0, Total=306 [2021-10-28 23:28:06,251 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand has 18 states, 16 states have (on average 3.0625) internal successors, (49), 12 states have internal predecessors, (49), 9 states have call successors, (19), 9 states have call predecessors, (19), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-10-28 23:28:08,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:28:08,247 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2021-10-28 23:28:08,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 23:28:08,248 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.0625) internal successors, (49), 12 states have internal predecessors, (49), 9 states have call successors, (19), 9 states have call predecessors, (19), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 55 [2021-10-28 23:28:08,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:28:08,249 INFO L225 Difference]: With dead ends: 112 [2021-10-28 23:28:08,249 INFO L226 Difference]: Without dead ends: 112 [2021-10-28 23:28:08,250 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=233, Invalid=956, Unknown=1, NotChecked=0, Total=1190 [2021-10-28 23:28:08,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-28 23:28:08,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2021-10-28 23:28:08,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 74 states have internal predecessors, (77), 15 states have call successors, (15), 13 states have call predecessors, (15), 13 states have return successors, (16), 15 states have call predecessors, (16), 14 states have call successors, (16) [2021-10-28 23:28:08,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2021-10-28 23:28:08,256 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 55 [2021-10-28 23:28:08,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:28:08,257 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2021-10-28 23:28:08,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.0625) internal successors, (49), 12 states have internal predecessors, (49), 9 states have call successors, (19), 9 states have call predecessors, (19), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-10-28 23:28:08,257 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2021-10-28 23:28:08,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-28 23:28:08,258 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:28:08,258 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-10-28 23:28:08,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:28:08,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 23:28:08,460 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting checkErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-28 23:28:08,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:28:08,460 INFO L85 PathProgramCache]: Analyzing trace with hash 744753187, now seen corresponding path program 1 times [2021-10-28 23:28:08,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:28:08,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284654102] [2021-10-28 23:28:08,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:28:08,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:28:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:08,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:28:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:08,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:28:08,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:08,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 23:28:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:08,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 23:28:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:08,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-28 23:28:08,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:08,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 23:28:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:08,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-10-28 23:28:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:08,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-10-28 23:28:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 23:28:08,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:28:08,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284654102] [2021-10-28 23:28:08,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284654102] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:28:08,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319190672] [2021-10-28 23:28:08,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:28:08,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:28:08,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:28:08,778 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:28:08,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 23:28:09,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:09,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-28 23:28:09,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:28:09,123 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 [2021-10-28 23:28:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 23:28:10,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319190672] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:28:10,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:28:10,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-10-28 23:28:10,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021636115] [2021-10-28 23:28:10,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 23:28:10,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:28:10,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 23:28:10,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:28:10,237 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand has 18 states, 16 states have (on average 3.1875) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (19), 9 states have call predecessors, (19), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-10-28 23:28:12,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:28:12,331 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2021-10-28 23:28:12,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 23:28:12,332 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.1875) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (19), 9 states have call predecessors, (19), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 56 [2021-10-28 23:28:12,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:28:12,334 INFO L225 Difference]: With dead ends: 111 [2021-10-28 23:28:12,334 INFO L226 Difference]: Without dead ends: 111 [2021-10-28 23:28:12,335 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 58 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 23:28:12,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-28 23:28:12,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 102. [2021-10-28 23:28:12,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 73 states have internal predecessors, (76), 15 states have call successors, (15), 13 states have call predecessors, (15), 13 states have return successors, (16), 15 states have call predecessors, (16), 14 states have call successors, (16) [2021-10-28 23:28:12,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2021-10-28 23:28:12,342 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 56 [2021-10-28 23:28:12,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:28:12,343 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2021-10-28 23:28:12,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.1875) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (19), 9 states have call predecessors, (19), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-10-28 23:28:12,343 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2021-10-28 23:28:12,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-28 23:28:12,344 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:28:12,345 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1] [2021-10-28 23:28:12,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 23:28:12,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:28:12,570 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-28 23:28:12,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:28:12,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1851163875, now seen corresponding path program 1 times [2021-10-28 23:28:12,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:28:12,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94400321] [2021-10-28 23:28:12,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:28:12,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:28:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:12,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:28:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:12,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:28:12,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:12,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 23:28:12,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:12,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 23:28:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:12,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-28 23:28:12,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:12,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:28:12,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:12,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 23:28:12,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:12,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-10-28 23:28:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:13,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-28 23:28:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-28 23:28:13,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:28:13,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94400321] [2021-10-28 23:28:13,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94400321] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:28:13,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658820019] [2021-10-28 23:28:13,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:28:13,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:28:13,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:28:13,050 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:28:13,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 23:28:13,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:13,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-28 23:28:13,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:28:13,466 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 [2021-10-28 23:28:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 23:28:17,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658820019] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:28:17,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:28:17,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-10-28 23:28:17,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266245632] [2021-10-28 23:28:17,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 23:28:17,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:28:17,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 23:28:17,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=630, Unknown=1, NotChecked=0, Total=702 [2021-10-28 23:28:17,178 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand has 27 states, 23 states have (on average 2.739130434782609) internal successors, (63), 21 states have internal predecessors, (63), 9 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2021-10-28 23:28:22,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:28:22,004 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2021-10-28 23:28:22,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-28 23:28:22,005 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 2.739130434782609) internal successors, (63), 21 states have internal predecessors, (63), 9 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) Word has length 62 [2021-10-28 23:28:22,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:28:22,006 INFO L225 Difference]: With dead ends: 109 [2021-10-28 23:28:22,007 INFO L226 Difference]: Without dead ends: 85 [2021-10-28 23:28:22,008 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=278, Invalid=1701, Unknown=1, NotChecked=0, Total=1980 [2021-10-28 23:28:22,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-10-28 23:28:22,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2021-10-28 23:28:22,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 55 states have internal predecessors, (58), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2021-10-28 23:28:22,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2021-10-28 23:28:22,013 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 62 [2021-10-28 23:28:22,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:28:22,014 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2021-10-28 23:28:22,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 2.739130434782609) internal successors, (63), 21 states have internal predecessors, (63), 9 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2021-10-28 23:28:22,015 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2021-10-28 23:28:22,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-28 23:28:22,016 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:28:22,016 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1] [2021-10-28 23:28:22,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-28 23:28:22,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:28:22,226 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting checkErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-10-28 23:28:22,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:28:22,226 INFO L85 PathProgramCache]: Analyzing trace with hash -619591727, now seen corresponding path program 1 times [2021-10-28 23:28:22,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:28:22,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496711565] [2021-10-28 23:28:22,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:28:22,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:28:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:22,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 23:28:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:22,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:28:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:22,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-28 23:28:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:22,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 23:28:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:22,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-28 23:28:22,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:22,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-28 23:28:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:22,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-10-28 23:28:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:22,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:28:22,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:22,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 23:28:22,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:22,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-10-28 23:28:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:22,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-28 23:28:22,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:22,743 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-28 23:28:22,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:28:22,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496711565] [2021-10-28 23:28:22,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496711565] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:28:22,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788828318] [2021-10-28 23:28:22,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:28:22,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:28:22,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:28:22,750 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:28:22,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 23:28:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:28:23,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-28 23:28:23,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:28:23,931 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-28 23:28:23,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788828318] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:28:23,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:28:23,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2021-10-28 23:28:23,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188969335] [2021-10-28 23:28:23,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 23:28:23,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:28:23,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 23:28:23,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=909, Unknown=0, NotChecked=0, Total=992 [2021-10-28 23:28:23,934 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 32 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 14 states have call successors, (22), 5 states have call predecessors, (22), 4 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) [2021-10-28 23:28:26,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:28:26,565 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2021-10-28 23:28:26,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 23:28:26,565 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 14 states have call successors, (22), 5 states have call predecessors, (22), 4 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) Word has length 79 [2021-10-28 23:28:26,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:28:26,566 INFO L225 Difference]: With dead ends: 84 [2021-10-28 23:28:26,566 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 23:28:26,568 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=410, Invalid=2452, Unknown=0, NotChecked=0, Total=2862 [2021-10-28 23:28:26,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 23:28:26,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 23:28:26,569 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) [2021-10-28 23:28:26,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 23:28:26,569 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2021-10-28 23:28:26,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:28:26,569 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 23:28:26,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 14 states have call successors, (22), 5 states have call predecessors, (22), 4 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) [2021-10-28 23:28:26,570 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 23:28:26,570 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 23:28:26,572 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-28 23:28:26,572 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-28 23:28:26,572 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-10-28 23:28:26,572 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-10-28 23:28:26,573 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:28:26,573 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:28:26,573 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 23:28:26,573 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 23:28:26,574 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr0REQUIRES_VIOLATION [2021-10-28 23:28:26,574 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr1REQUIRES_VIOLATION [2021-10-28 23:28:26,574 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr2REQUIRES_VIOLATION [2021-10-28 23:28:26,574 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr3REQUIRES_VIOLATION [2021-10-28 23:28:26,574 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr4REQUIRES_VIOLATION [2021-10-28 23:28:26,575 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr5REQUIRES_VIOLATION [2021-10-28 23:28:26,575 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr6REQUIRES_VIOLATION [2021-10-28 23:28:26,575 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr7REQUIRES_VIOLATION [2021-10-28 23:28:26,575 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 23:28:26,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 23:28:26,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:28:26,779 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:28:26,781 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:28:26,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:28:26 BoogieIcfgContainer [2021-10-28 23:28:26,784 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:28:26,784 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:28:26,785 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:28:26,785 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:28:26,785 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:27:16" (3/4) ... [2021-10-28 23:28:26,789 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 23:28:26,797 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-10-28 23:28:26,797 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-28 23:28:26,798 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-10-28 23:28:26,798 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-28 23:28:26,798 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-10-28 23:28:26,798 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2021-10-28 23:28:26,798 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure #Ultimate.meminit [2021-10-28 23:28:26,805 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-10-28 23:28:26,806 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-28 23:28:26,806 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 23:28:26,806 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 23:28:26,870 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:28:26,870 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:28:26,871 INFO L168 Benchmark]: Toolchain (without parser) took 71618.40 ms. Allocated memory was 88.1 MB in the beginning and 157.3 MB in the end (delta: 69.2 MB). Free memory was 52.3 MB in the beginning and 65.5 MB in the end (delta: -13.1 MB). Peak memory consumption was 56.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:28:26,872 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 88.1 MB. Free memory is still 68.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:28:26,872 INFO L168 Benchmark]: CACSL2BoogieTranslator took 453.99 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 52.2 MB in the beginning and 83.0 MB in the end (delta: -30.8 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2021-10-28 23:28:26,872 INFO L168 Benchmark]: Boogie Preprocessor took 80.05 ms. Allocated memory is still 107.0 MB. Free memory was 83.0 MB in the beginning and 81.4 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:28:26,873 INFO L168 Benchmark]: RCFGBuilder took 680.19 ms. Allocated memory is still 107.0 MB. Free memory was 81.4 MB in the beginning and 67.6 MB in the end (delta: 13.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-28 23:28:26,873 INFO L168 Benchmark]: TraceAbstraction took 70308.07 ms. Allocated memory was 107.0 MB in the beginning and 157.3 MB in the end (delta: 50.3 MB). Free memory was 66.9 MB in the beginning and 69.4 MB in the end (delta: -2.4 MB). Peak memory consumption was 50.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:28:26,874 INFO L168 Benchmark]: Witness Printer took 85.60 ms. Allocated memory is still 157.3 MB. Free memory was 69.4 MB in the beginning and 65.5 MB in the end (delta: 3.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:28:26,876 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 88.1 MB. Free memory is still 68.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 453.99 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 52.2 MB in the beginning and 83.0 MB in the end (delta: -30.8 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 80.05 ms. Allocated memory is still 107.0 MB. Free memory was 83.0 MB in the beginning and 81.4 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 680.19 ms. Allocated memory is still 107.0 MB. Free memory was 81.4 MB in the beginning and 67.6 MB in the end (delta: 13.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 70308.07 ms. Allocated memory was 107.0 MB in the beginning and 157.3 MB in the end (delta: 50.3 MB). Free memory was 66.9 MB in the beginning and 69.4 MB in the end (delta: -2.4 MB). Peak memory consumption was 50.5 MB. Max. memory is 16.1 GB. * Witness Printer took 85.60 ms. Allocated memory is still 157.3 MB. Free memory was 69.4 MB in the beginning and 65.5 MB in the end (delta: 3.9 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 48]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 48]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 49]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 49]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 40]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 33]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 33]: 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: 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, 76 locations, 17 error locations. Started 1 CEGAR loops. OverallTime: 70.2s, OverallIterations: 20, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 39.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 843 SDtfs, 3010 SDslu, 1721 SDs, 0 SdLazy, 9662 SolverSat, 1636 SolverUnsat, 15 SolverUnknown, 0 SolverNotchecked, 11.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1126 GetRequests, 653 SyntacticMatches, 28 SemanticMatches, 445 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 2035 ImplicationChecksByTransitivity, 43.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=147occurred in iteration=14, InterpolantAutomatonStates: 291, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 20 MinimizatonAttempts, 209 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 25.8s InterpolantComputationTime, 1382 NumberOfCodeBlocks, 1382 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 1353 ConstructedInterpolants, 109 QuantifiedInterpolants, 7625 SizeOfPredicates, 72 NumberOfNonLiveVariables, 2298 ConjunctsInSsa, 217 ConjunctsInUnsatCore, 29 InterpolantComputations, 13 PerfectInterpolantSequences, 418/506 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 17 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-28 23:28:26,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59c648e8-20d2-4cff-95c8-bc554aaa8e20/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...