./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_remove_all.i --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_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_remove_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg --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 cd9bd7b6c1446abd728b90c98a54cb367face4c5994cfeca4979c2dbc50ad4d3 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 09:59:24,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:59:24,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:59:24,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:59:24,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:59:24,617 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:59:24,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:59:24,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:59:24,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:59:24,640 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:59:24,641 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:59:24,644 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:59:24,645 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:59:24,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:59:24,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:59:24,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:59:24,662 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:59:24,664 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:59:24,667 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:59:24,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:59:24,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:59:24,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:59:24,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:59:24,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:59:24,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:59:24,697 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:59:24,698 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:59:24,700 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:59:24,701 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:59:24,704 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:59:24,704 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:59:24,706 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:59:24,709 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:59:24,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:59:24,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:59:24,714 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:59:24,715 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:59:24,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:59:24,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:59:24,717 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:59:24,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:59:24,720 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 09:59:24,779 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:59:24,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:59:24,780 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:59:24,781 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:59:24,783 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:59:24,783 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:59:24,784 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:59:24,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:59:24,785 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:59:24,785 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 09:59:24,786 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:59:24,787 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:59:24,787 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:59:24,787 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 09:59:24,788 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 09:59:24,788 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 09:59:24,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:59:24,789 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 09:59:24,789 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:59:24,789 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:59:24,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:59:24,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:59:24,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:59:24,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:59:24,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:59:24,791 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:59:24,792 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:59:24,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:59:24,792 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:59:24,794 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_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd9bd7b6c1446abd728b90c98a54cb367face4c5994cfeca4979c2dbc50ad4d3 [2021-10-28 09:59:25,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:59:25,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:59:25,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:59:25,236 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:59:25,237 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:59:25,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/list-simple/sll2c_remove_all.i [2021-10-28 09:59:25,326 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/data/eec5c0160/2fa647b2b9ea4e7d942a37968bbc64a1/FLAG95bcaa075 [2021-10-28 09:59:26,033 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:59:26,039 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/sv-benchmarks/c/list-simple/sll2c_remove_all.i [2021-10-28 09:59:26,066 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/data/eec5c0160/2fa647b2b9ea4e7d942a37968bbc64a1/FLAG95bcaa075 [2021-10-28 09:59:26,270 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/data/eec5c0160/2fa647b2b9ea4e7d942a37968bbc64a1 [2021-10-28 09:59:26,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:59:26,274 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 09:59:26,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:59:26,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:59:26,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:59:26,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:59:26" (1/1) ... [2021-10-28 09:59:26,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65236658 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:26, skipping insertion in model container [2021-10-28 09:59:26,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:59:26" (1/1) ... [2021-10-28 09:59:26,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:59:26,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:59:26,726 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_fc3e5a89-480f-482d-b25c-e5a42d959745/sv-benchmarks/c/list-simple/sll2c_remove_all.i[24082,24095] [2021-10-28 09:59:26,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:59:26,738 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:59:26,787 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_fc3e5a89-480f-482d-b25c-e5a42d959745/sv-benchmarks/c/list-simple/sll2c_remove_all.i[24082,24095] [2021-10-28 09:59:26,788 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:59:26,838 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:59:26,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:26 WrapperNode [2021-10-28 09:59:26,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:59:26,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:59:26,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:59:26,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:59:26,859 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:26" (1/1) ... [2021-10-28 09:59:26,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:26" (1/1) ... [2021-10-28 09:59:26,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:26" (1/1) ... [2021-10-28 09:59:26,897 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:26" (1/1) ... [2021-10-28 09:59:26,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:26" (1/1) ... [2021-10-28 09:59:26,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:26" (1/1) ... [2021-10-28 09:59:26,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:26" (1/1) ... [2021-10-28 09:59:26,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:59:26,970 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:59:26,970 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:59:26,970 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:59:26,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:26" (1/1) ... [2021-10-28 09:59:26,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:59:27,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:59:27,020 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:59:27,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:59:27,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 09:59:27,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:59:27,077 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 09:59:27,078 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 09:59:27,078 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 09:59:27,079 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-28 09:59:27,079 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-10-28 09:59:27,079 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_create [2021-10-28 09:59:27,080 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_remove_first [2021-10-28 09:59:27,081 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 09:59:27,081 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 09:59:27,081 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 09:59:27,081 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 09:59:27,082 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 09:59:27,082 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 09:59:27,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:59:27,082 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 09:59:27,082 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 09:59:27,082 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 09:59:27,083 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 09:59:27,083 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 09:59:27,083 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 09:59:27,083 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 09:59:27,083 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 09:59:27,084 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 09:59:27,084 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 09:59:27,084 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 09:59:27,084 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 09:59:27,084 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 09:59:27,084 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 09:59:27,085 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 09:59:27,085 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 09:59:27,085 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 09:59:27,085 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 09:59:27,085 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 09:59:27,086 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 09:59:27,086 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 09:59:27,086 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 09:59:27,086 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 09:59:27,086 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 09:59:27,086 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 09:59:27,087 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 09:59:27,087 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 09:59:27,087 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 09:59:27,087 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 09:59:27,087 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 09:59:27,088 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 09:59:27,088 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 09:59:27,088 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 09:59:27,088 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 09:59:27,089 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 09:59:27,089 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 09:59:27,089 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 09:59:27,089 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 09:59:27,089 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 09:59:27,089 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 09:59:27,089 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 09:59:27,090 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 09:59:27,090 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 09:59:27,090 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 09:59:27,090 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 09:59:27,090 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 09:59:27,090 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 09:59:27,090 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 09:59:27,091 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 09:59:27,091 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 09:59:27,092 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 09:59:27,093 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 09:59:27,093 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 09:59:27,094 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 09:59:27,094 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 09:59:27,094 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 09:59:27,094 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-28 09:59:27,094 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 09:59:27,095 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 09:59:27,095 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 09:59:27,095 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 09:59:27,095 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 09:59:27,095 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 09:59:27,095 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 09:59:27,096 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 09:59:27,097 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 09:59:27,097 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 09:59:27,097 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 09:59:27,097 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 09:59:27,097 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 09:59:27,097 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 09:59:27,097 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 09:59:27,098 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 09:59:27,098 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 09:59:27,098 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 09:59:27,098 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 09:59:27,098 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 09:59:27,098 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 09:59:27,098 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 09:59:27,098 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 09:59:27,099 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 09:59:27,099 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 09:59:27,099 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 09:59:27,099 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 09:59:27,099 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 09:59:27,099 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 09:59:27,099 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 09:59:27,099 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 09:59:27,100 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 09:59:27,100 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 09:59:27,100 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 09:59:27,101 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 09:59:27,101 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 09:59:27,102 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 09:59:27,102 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 09:59:27,102 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 09:59:27,102 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 09:59:27,102 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 09:59:27,102 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 09:59:27,103 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 09:59:27,103 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 09:59:27,103 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 09:59:27,103 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 09:59:27,103 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 09:59:27,103 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-28 09:59:27,103 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-10-28 09:59:27,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 09:59:27,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 09:59:27,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 09:59:27,105 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_create [2021-10-28 09:59:27,105 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_remove_first [2021-10-28 09:59:27,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 09:59:27,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 09:59:27,110 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 09:59:27,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-28 09:59:27,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 09:59:27,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:59:27,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:59:27,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 09:59:27,558 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-28 09:59:27,915 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:59:27,916 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-10-28 09:59:27,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:59:27 BoogieIcfgContainer [2021-10-28 09:59:27,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:59:27,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:59:27,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:59:27,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:59:27,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:59:26" (1/3) ... [2021-10-28 09:59:27,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31541ddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:59:27, skipping insertion in model container [2021-10-28 09:59:27,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:26" (2/3) ... [2021-10-28 09:59:27,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31541ddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:59:27, skipping insertion in model container [2021-10-28 09:59:27,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:59:27" (3/3) ... [2021-10-28 09:59:27,933 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all.i [2021-10-28 09:59:27,940 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:59:27,940 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2021-10-28 09:59:28,009 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:59:28,019 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 09:59:28,020 INFO L340 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2021-10-28 09:59:28,046 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 53 states have (on average 1.9622641509433962) internal successors, (104), 95 states have internal predecessors, (104), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-28 09:59:28,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 09:59:28,058 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:28,059 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:28,060 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 09:59:28,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:28,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1395759788, now seen corresponding path program 1 times [2021-10-28 09:59:28,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:28,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652080225] [2021-10-28 09:59:28,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:28,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:28,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:28,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:59:28,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:28,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652080225] [2021-10-28 09:59:28,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652080225] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:28,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:28,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:59:28,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374704392] [2021-10-28 09:59:28,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:59:28,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:28,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:59:28,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:59:28,580 INFO L87 Difference]: Start difference. First operand has 108 states, 53 states have (on average 1.9622641509433962) internal successors, (104), 95 states have internal predecessors, (104), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:28,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:28,928 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2021-10-28 09:59:28,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:59:28,929 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-28 09:59:28,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:28,941 INFO L225 Difference]: With dead ends: 106 [2021-10-28 09:59:28,941 INFO L226 Difference]: Without dead ends: 100 [2021-10-28 09:59:28,943 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:59:28,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-28 09:59:28,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-10-28 09:59:28,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 50 states have (on average 1.86) internal successors, (93), 89 states have internal predecessors, (93), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 09:59:29,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2021-10-28 09:59:29,004 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 12 [2021-10-28 09:59:29,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:29,005 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2021-10-28 09:59:29,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:29,005 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2021-10-28 09:59:29,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 09:59:29,006 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:29,006 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:29,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:59:29,007 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 09:59:29,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:29,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1395759787, now seen corresponding path program 1 times [2021-10-28 09:59:29,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:29,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799857257] [2021-10-28 09:59:29,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:29,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:29,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:29,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:29,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:59:29,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:29,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799857257] [2021-10-28 09:59:29,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799857257] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:29,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:29,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:59:29,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573448811] [2021-10-28 09:59:29,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:59:29,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:29,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:59:29,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:59:29,181 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:29,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:29,460 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2021-10-28 09:59:29,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:59:29,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-28 09:59:29,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:29,465 INFO L225 Difference]: With dead ends: 98 [2021-10-28 09:59:29,465 INFO L226 Difference]: Without dead ends: 98 [2021-10-28 09:59:29,466 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:59:29,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-28 09:59:29,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-10-28 09:59:29,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 50 states have (on average 1.82) internal successors, (91), 87 states have internal predecessors, (91), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 09:59:29,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2021-10-28 09:59:29,490 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 12 [2021-10-28 09:59:29,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:29,491 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2021-10-28 09:59:29,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:29,492 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2021-10-28 09:59:29,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:59:29,493 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:29,493 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:29,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 09:59:29,494 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting sll_circular_createErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 09:59:29,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:29,495 INFO L85 PathProgramCache]: Analyzing trace with hash -799936565, now seen corresponding path program 1 times [2021-10-28 09:59:29,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:29,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858511011] [2021-10-28 09:59:29,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:29,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:29,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:29,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:29,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 09:59:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:29,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:59:29,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:29,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858511011] [2021-10-28 09:59:29,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858511011] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:29,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:29,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 09:59:29,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034999786] [2021-10-28 09:59:29,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:59:29,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:29,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:59:29,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:59:29,742 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:59:30,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:30,151 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2021-10-28 09:59:30,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:59:30,152 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-10-28 09:59:30,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:30,157 INFO L225 Difference]: With dead ends: 105 [2021-10-28 09:59:30,157 INFO L226 Difference]: Without dead ends: 105 [2021-10-28 09:59:30,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:59:30,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-28 09:59:30,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2021-10-28 09:59:30,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 51 states have (on average 1.803921568627451) internal successors, (92), 88 states have internal predecessors, (92), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 09:59:30,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2021-10-28 09:59:30,185 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 19 [2021-10-28 09:59:30,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:30,186 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2021-10-28 09:59:30,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:59:30,186 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2021-10-28 09:59:30,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 09:59:30,189 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:30,189 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:30,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 09:59:30,190 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting sll_circular_createErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 09:59:30,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:30,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1837051173, now seen corresponding path program 1 times [2021-10-28 09:59:30,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:30,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371121422] [2021-10-28 09:59:30,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:30,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:30,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:30,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 09:59:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:30,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 09:59:30,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:30,416 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 09:59:30,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:30,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371121422] [2021-10-28 09:59:30,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371121422] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:30,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:30,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 09:59:30,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719329614] [2021-10-28 09:59:30,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:59:30,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:30,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:59:30,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:59:30,426 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 09:59:30,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:30,833 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2021-10-28 09:59:30,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:59:30,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-10-28 09:59:30,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:30,838 INFO L225 Difference]: With dead ends: 99 [2021-10-28 09:59:30,838 INFO L226 Difference]: Without dead ends: 99 [2021-10-28 09:59:30,840 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:59:30,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-28 09:59:30,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-10-28 09:59:30,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 87 states have internal predecessors, (91), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 09:59:30,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2021-10-28 09:59:30,862 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 28 [2021-10-28 09:59:30,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:30,863 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2021-10-28 09:59:30,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 09:59:30,864 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2021-10-28 09:59:30,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 09:59:30,865 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:30,865 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:30,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 09:59:30,866 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting sll_circular_createErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 09:59:30,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:30,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1837051174, now seen corresponding path program 1 times [2021-10-28 09:59:30,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:30,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955832695] [2021-10-28 09:59:30,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:30,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:30,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:30,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:30,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 09:59:30,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:31,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 09:59:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:59:31,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:31,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955832695] [2021-10-28 09:59:31,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955832695] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:31,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:31,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 09:59:31,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985872472] [2021-10-28 09:59:31,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:59:31,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:31,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:59:31,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:59:31,098 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 09:59:31,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:31,520 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-10-28 09:59:31,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:59:31,521 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-10-28 09:59:31,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:31,522 INFO L225 Difference]: With dead ends: 98 [2021-10-28 09:59:31,522 INFO L226 Difference]: Without dead ends: 98 [2021-10-28 09:59:31,522 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:59:31,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-28 09:59:31,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-10-28 09:59:31,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 86 states have internal predecessors, (90), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 09:59:31,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2021-10-28 09:59:31,528 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 28 [2021-10-28 09:59:31,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:31,528 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2021-10-28 09:59:31,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 09:59:31,529 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2021-10-28 09:59:31,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 09:59:31,530 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:31,530 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:31,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 09:59:31,530 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sll_circular_createErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 09:59:31,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:31,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1118258617, now seen corresponding path program 1 times [2021-10-28 09:59:31,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:31,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515147174] [2021-10-28 09:59:31,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:31,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:31,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:31,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 09:59:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:31,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 09:59:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:59:31,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:31,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515147174] [2021-10-28 09:59:31,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515147174] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:59:31,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648042275] [2021-10-28 09:59:31,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:31,760 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:59:31,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:59:31,762 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:59:31,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 09:59:31,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:31,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 09:59:31,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:59:32,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 09:59:32,376 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 09:59:32,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-28 09:59:32,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:59:32,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648042275] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:32,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:59:32,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 14 [2021-10-28 09:59:32,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825335418] [2021-10-28 09:59:32,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 09:59:32,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:32,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:59:32,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:59:32,508 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 09:59:32,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:32,843 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-10-28 09:59:32,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 09:59:32,844 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-10-28 09:59:32,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:32,845 INFO L225 Difference]: With dead ends: 98 [2021-10-28 09:59:32,845 INFO L226 Difference]: Without dead ends: 98 [2021-10-28 09:59:32,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-10-28 09:59:32,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-28 09:59:32,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2021-10-28 09:59:32,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 51 states have (on average 1.7450980392156863) internal successors, (89), 85 states have internal predecessors, (89), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 09:59:32,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2021-10-28 09:59:32,852 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 31 [2021-10-28 09:59:32,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:32,852 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2021-10-28 09:59:32,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 09:59:32,853 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2021-10-28 09:59:32,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 09:59:32,854 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:32,854 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:32,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:59:33,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:59:33,076 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting sll_circular_createErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 09:59:33,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:33,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1118258618, now seen corresponding path program 1 times [2021-10-28 09:59:33,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:33,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354294445] [2021-10-28 09:59:33,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:33,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:33,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:33,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:33,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-28 09:59:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:33,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 09:59:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:33,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:59:33,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:33,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354294445] [2021-10-28 09:59:33,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354294445] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:59:33,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108054322] [2021-10-28 09:59:33,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:33,401 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:59:33,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:59:33,404 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:59:33,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 09:59:33,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:33,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-28 09:59:33,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:59:33,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 09:59:33,871 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-28 09:59:33,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 9 [2021-10-28 09:59:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:59:33,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108054322] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:59:33,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:59:33,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-10-28 09:59:33,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543080216] [2021-10-28 09:59:33,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 09:59:33,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:33,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 09:59:33,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:59:33,955 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 09:59:34,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:34,670 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-10-28 09:59:34,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:59:34,671 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2021-10-28 09:59:34,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:34,672 INFO L225 Difference]: With dead ends: 96 [2021-10-28 09:59:34,672 INFO L226 Difference]: Without dead ends: 96 [2021-10-28 09:59:34,673 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-10-28 09:59:34,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-28 09:59:34,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-10-28 09:59:34,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 51 states have (on average 1.7254901960784315) internal successors, (88), 84 states have internal predecessors, (88), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 09:59:34,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2021-10-28 09:59:34,679 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 31 [2021-10-28 09:59:34,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:34,685 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2021-10-28 09:59:34,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 09:59:34,685 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2021-10-28 09:59:34,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-28 09:59:34,689 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:34,689 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:34,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:59:34,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:59:34,912 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 09:59:34,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:34,912 INFO L85 PathProgramCache]: Analyzing trace with hash 376686718, now seen corresponding path program 1 times [2021-10-28 09:59:34,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:34,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495092583] [2021-10-28 09:59:34,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:34,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:34,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:34,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:34,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 09:59:35,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:35,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 09:59:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:35,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 09:59:35,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 09:59:35,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:35,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495092583] [2021-10-28 09:59:35,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495092583] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:35,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:35,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:59:35,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423376851] [2021-10-28 09:59:35,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:59:35,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:35,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:59:35,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:59:35,037 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 09:59:35,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:35,294 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-10-28 09:59:35,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:59:35,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2021-10-28 09:59:35,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:35,296 INFO L225 Difference]: With dead ends: 98 [2021-10-28 09:59:35,296 INFO L226 Difference]: Without dead ends: 98 [2021-10-28 09:59:35,297 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:59:35,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-28 09:59:35,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2021-10-28 09:59:35,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 52 states have (on average 1.7115384615384615) internal successors, (89), 85 states have internal predecessors, (89), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 09:59:35,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2021-10-28 09:59:35,303 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 37 [2021-10-28 09:59:35,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:35,303 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2021-10-28 09:59:35,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 09:59:35,304 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2021-10-28 09:59:35,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 09:59:35,314 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:35,314 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:35,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 09:59:35,315 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting sll_circular_remove_firstErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 09:59:35,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:35,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1218858003, now seen corresponding path program 1 times [2021-10-28 09:59:35,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:35,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347526527] [2021-10-28 09:59:35,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:35,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:35,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:35,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 09:59:35,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:35,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 09:59:35,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:35,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 09:59:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:36,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 09:59:36,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:36,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347526527] [2021-10-28 09:59:36,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347526527] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:59:36,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407690975] [2021-10-28 09:59:36,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:36,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:59:36,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:59:36,046 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:59:36,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 09:59:36,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:36,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-28 09:59:36,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:59:36,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 09:59:36,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-10-28 09:59:36,901 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-28 09:59:36,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 24 [2021-10-28 09:59:37,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:59:37,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407690975] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:59:37,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:59:37,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-10-28 09:59:37,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491178105] [2021-10-28 09:59:37,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 09:59:37,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:37,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 09:59:37,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-10-28 09:59:37,091 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 23 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 18 states have internal predecessors, (56), 7 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-28 10:01:03,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:01:03,090 INFO L93 Difference]: Finished difference Result 147 states and 157 transitions. [2021-10-28 10:01:03,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 10:01:03,091 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 18 states have internal predecessors, (56), 7 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 39 [2021-10-28 10:01:03,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:01:03,092 INFO L225 Difference]: With dead ends: 147 [2021-10-28 10:01:03,093 INFO L226 Difference]: Without dead ends: 147 [2021-10-28 10:01:03,093 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=190, Invalid=998, Unknown=2, NotChecked=0, Total=1190 [2021-10-28 10:01:03,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-28 10:01:03,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 105. [2021-10-28 10:01:03,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 63 states have (on average 1.5396825396825398) internal successors, (97), 91 states have internal predecessors, (97), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-10-28 10:01:03,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 113 transitions. [2021-10-28 10:01:03,100 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 113 transitions. Word has length 39 [2021-10-28 10:01:03,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:01:03,100 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 113 transitions. [2021-10-28 10:01:03,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 18 states have internal predecessors, (56), 7 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-28 10:01:03,101 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 113 transitions. [2021-10-28 10:01:03,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 10:01:03,102 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:01:03,102 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 10:01:03,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 10:01:03,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-28 10:01:03,308 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting sll_circular_remove_firstErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:01:03,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:01:03,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1218858004, now seen corresponding path program 1 times [2021-10-28 10:01:03,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:01:03,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388994028] [2021-10-28 10:01:03,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:03,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:01:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:03,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:01:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:03,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:01:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:03,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:01:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:03,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:01:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:03,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 10:01:03,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:01:03,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388994028] [2021-10-28 10:01:03,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388994028] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:01:03,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349513816] [2021-10-28 10:01:03,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:03,899 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:01:03,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 10:01:03,900 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 10:01:03,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 10:01:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:04,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 10:01:04,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 10:01:04,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 10:01:04,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-10-28 10:01:04,792 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-28 10:01:04,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2021-10-28 10:01:05,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 10:01:05,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349513816] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:01:05,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 10:01:05,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-10-28 10:01:05,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425802119] [2021-10-28 10:01:05,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 10:01:05,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:01:05,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 10:01:05,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-10-28 10:01:05,015 INFO L87 Difference]: Start difference. First operand 105 states and 113 transitions. Second operand has 19 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-28 10:01:06,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:01:06,581 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2021-10-28 10:01:06,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 10:01:06,582 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 39 [2021-10-28 10:01:06,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:01:06,584 INFO L225 Difference]: With dead ends: 158 [2021-10-28 10:01:06,584 INFO L226 Difference]: Without dead ends: 158 [2021-10-28 10:01:06,585 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2021-10-28 10:01:06,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-28 10:01:06,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 135. [2021-10-28 10:01:06,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 91 states have (on average 1.5934065934065933) internal successors, (145), 119 states have internal predecessors, (145), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-10-28 10:01:06,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 163 transitions. [2021-10-28 10:01:06,592 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 163 transitions. Word has length 39 [2021-10-28 10:01:06,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:01:06,593 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 163 transitions. [2021-10-28 10:01:06,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-28 10:01:06,594 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 163 transitions. [2021-10-28 10:01:06,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 10:01:06,595 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:01:06,595 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 10:01:06,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 10:01:06,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 10:01:06,815 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting sll_circular_remove_firstErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:01:06,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:01:06,816 INFO L85 PathProgramCache]: Analyzing trace with hash -870107508, now seen corresponding path program 1 times [2021-10-28 10:01:06,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:01:06,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001572198] [2021-10-28 10:01:06,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:06,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:01:06,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:06,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:01:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:06,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:01:06,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:07,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:01:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:07,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:01:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:07,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 10:01:07,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:01:07,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001572198] [2021-10-28 10:01:07,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001572198] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 10:01:07,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 10:01:07,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-28 10:01:07,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487171177] [2021-10-28 10:01:07,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 10:01:07,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:01:07,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 10:01:07,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-10-28 10:01:07,090 INFO L87 Difference]: Start difference. First operand 135 states and 163 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 10:01:07,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:01:07,934 INFO L93 Difference]: Finished difference Result 186 states and 229 transitions. [2021-10-28 10:01:07,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 10:01:07,934 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2021-10-28 10:01:07,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:01:07,936 INFO L225 Difference]: With dead ends: 186 [2021-10-28 10:01:07,936 INFO L226 Difference]: Without dead ends: 186 [2021-10-28 10:01:07,937 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-10-28 10:01:07,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-10-28 10:01:07,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 140. [2021-10-28 10:01:07,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 95 states have (on average 1.6105263157894736) internal successors, (153), 123 states have internal predecessors, (153), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-28 10:01:07,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 173 transitions. [2021-10-28 10:01:07,944 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 173 transitions. Word has length 40 [2021-10-28 10:01:07,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:01:07,945 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 173 transitions. [2021-10-28 10:01:07,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 10:01:07,945 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 173 transitions. [2021-10-28 10:01:07,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 10:01:07,946 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:01:07,946 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 10:01:07,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 10:01:07,947 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting sll_circular_remove_firstErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:01:07,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:01:07,947 INFO L85 PathProgramCache]: Analyzing trace with hash -870107507, now seen corresponding path program 1 times [2021-10-28 10:01:07,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:01:07,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207273996] [2021-10-28 10:01:07,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:07,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:01:07,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:08,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:01:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:08,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:01:08,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:08,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:01:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:08,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:01:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 10:01:08,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:01:08,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207273996] [2021-10-28 10:01:08,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207273996] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 10:01:08,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 10:01:08,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-28 10:01:08,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52289139] [2021-10-28 10:01:08,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 10:01:08,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:01:08,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 10:01:08,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-10-28 10:01:08,247 INFO L87 Difference]: Start difference. First operand 140 states and 173 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 10:01:09,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:01:09,181 INFO L93 Difference]: Finished difference Result 189 states and 232 transitions. [2021-10-28 10:01:09,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 10:01:09,182 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2021-10-28 10:01:09,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:01:09,184 INFO L225 Difference]: With dead ends: 189 [2021-10-28 10:01:09,184 INFO L226 Difference]: Without dead ends: 189 [2021-10-28 10:01:09,184 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-10-28 10:01:09,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-10-28 10:01:09,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2021-10-28 10:01:09,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 95 states have (on average 1.5894736842105264) internal successors, (151), 123 states have internal predecessors, (151), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-10-28 10:01:09,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 171 transitions. [2021-10-28 10:01:09,193 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 171 transitions. Word has length 40 [2021-10-28 10:01:09,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:01:09,195 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 171 transitions. [2021-10-28 10:01:09,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 10:01:09,195 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 171 transitions. [2021-10-28 10:01:09,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 10:01:09,199 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:01:09,199 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 10:01:09,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-28 10:01:09,200 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting sll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:01:09,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:01:09,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1779866749, now seen corresponding path program 1 times [2021-10-28 10:01:09,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:01:09,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353769119] [2021-10-28 10:01:09,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:09,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:01:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:09,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:01:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:09,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:01:09,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:09,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:01:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:09,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:01:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:09,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 10:01:09,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:01:09,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353769119] [2021-10-28 10:01:09,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353769119] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 10:01:09,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 10:01:09,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-28 10:01:09,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774436962] [2021-10-28 10:01:09,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 10:01:09,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:01:09,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 10:01:09,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-10-28 10:01:09,431 INFO L87 Difference]: Start difference. First operand 140 states and 171 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 10:01:10,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:01:10,199 INFO L93 Difference]: Finished difference Result 217 states and 271 transitions. [2021-10-28 10:01:10,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 10:01:10,200 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2021-10-28 10:01:10,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:01:10,202 INFO L225 Difference]: With dead ends: 217 [2021-10-28 10:01:10,202 INFO L226 Difference]: Without dead ends: 217 [2021-10-28 10:01:10,203 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-10-28 10:01:10,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-10-28 10:01:10,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 176. [2021-10-28 10:01:10,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 125 states have (on average 1.608) internal successors, (201), 155 states have internal predecessors, (201), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (18), 10 states have call predecessors, (18), 11 states have call successors, (18) [2021-10-28 10:01:10,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 231 transitions. [2021-10-28 10:01:10,224 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 231 transitions. Word has length 45 [2021-10-28 10:01:10,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:01:10,225 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 231 transitions. [2021-10-28 10:01:10,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 10:01:10,225 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 231 transitions. [2021-10-28 10:01:10,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 10:01:10,228 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:01:10,229 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 10:01:10,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 10:01:10,229 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting sll_circular_remove_firstErr15REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:01:10,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:01:10,230 INFO L85 PathProgramCache]: Analyzing trace with hash -658274541, now seen corresponding path program 1 times [2021-10-28 10:01:10,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:01:10,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801731473] [2021-10-28 10:01:10,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:10,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:01:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:10,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:01:10,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:10,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:01:10,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:10,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:01:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:10,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:01:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:10,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 10:01:10,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:01:10,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801731473] [2021-10-28 10:01:10,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801731473] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 10:01:10,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 10:01:10,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 10:01:10,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055826225] [2021-10-28 10:01:10,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 10:01:10,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:01:10,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 10:01:10,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 10:01:10,368 INFO L87 Difference]: Start difference. First operand 176 states and 231 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 10:01:10,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:01:10,828 INFO L93 Difference]: Finished difference Result 177 states and 231 transitions. [2021-10-28 10:01:10,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 10:01:10,829 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2021-10-28 10:01:10,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:01:10,832 INFO L225 Difference]: With dead ends: 177 [2021-10-28 10:01:10,832 INFO L226 Difference]: Without dead ends: 177 [2021-10-28 10:01:10,832 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-10-28 10:01:10,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-10-28 10:01:10,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2021-10-28 10:01:10,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 127 states have (on average 1.5826771653543308) internal successors, (201), 155 states have internal predecessors, (201), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (18), 10 states have call predecessors, (18), 11 states have call successors, (18) [2021-10-28 10:01:10,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 231 transitions. [2021-10-28 10:01:10,851 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 231 transitions. Word has length 46 [2021-10-28 10:01:10,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:01:10,851 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 231 transitions. [2021-10-28 10:01:10,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 10:01:10,852 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 231 transitions. [2021-10-28 10:01:10,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 10:01:10,853 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:01:10,853 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 10:01:10,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-28 10:01:10,854 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting sll_circular_remove_firstErr16REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:01:10,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:01:10,854 INFO L85 PathProgramCache]: Analyzing trace with hash -658274540, now seen corresponding path program 1 times [2021-10-28 10:01:10,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:01:10,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37961382] [2021-10-28 10:01:10,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:10,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:01:10,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:11,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:01:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:11,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:01:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:11,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:01:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:11,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:01:11,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 10:01:11,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:01:11,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37961382] [2021-10-28 10:01:11,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37961382] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 10:01:11,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 10:01:11,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-28 10:01:11,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108903531] [2021-10-28 10:01:11,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 10:01:11,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:01:11,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 10:01:11,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-10-28 10:01:11,260 INFO L87 Difference]: Start difference. First operand 176 states and 231 transitions. Second operand has 17 states, 16 states have (on average 2.25) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 10:01:12,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:01:12,331 INFO L93 Difference]: Finished difference Result 255 states and 325 transitions. [2021-10-28 10:01:12,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 10:01:12,331 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2021-10-28 10:01:12,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:01:12,333 INFO L225 Difference]: With dead ends: 255 [2021-10-28 10:01:12,334 INFO L226 Difference]: Without dead ends: 255 [2021-10-28 10:01:12,334 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-10-28 10:01:12,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-10-28 10:01:12,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 210. [2021-10-28 10:01:12,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 159 states have (on average 1.5723270440251573) internal successors, (250), 189 states have internal predecessors, (250), 12 states have call successors, (12), 10 states have call predecessors, (12), 12 states have return successors, (20), 10 states have call predecessors, (20), 11 states have call successors, (20) [2021-10-28 10:01:12,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 282 transitions. [2021-10-28 10:01:12,363 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 282 transitions. Word has length 46 [2021-10-28 10:01:12,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:01:12,363 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 282 transitions. [2021-10-28 10:01:12,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 10:01:12,364 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 282 transitions. [2021-10-28 10:01:12,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 10:01:12,365 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:01:12,365 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 10:01:12,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-28 10:01:12,365 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting sll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:01:12,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:01:12,367 INFO L85 PathProgramCache]: Analyzing trace with hash -658705490, now seen corresponding path program 1 times [2021-10-28 10:01:12,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:01:12,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645458010] [2021-10-28 10:01:12,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:12,368 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:01:12,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:12,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:01:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:12,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:01:12,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:12,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:01:12,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:12,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:01:12,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 10:01:12,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:01:12,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645458010] [2021-10-28 10:01:12,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645458010] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 10:01:12,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 10:01:12,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-28 10:01:12,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739332210] [2021-10-28 10:01:12,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 10:01:12,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:01:12,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 10:01:12,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-10-28 10:01:12,599 INFO L87 Difference]: Start difference. First operand 210 states and 282 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 10:01:13,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:01:13,498 INFO L93 Difference]: Finished difference Result 245 states and 321 transitions. [2021-10-28 10:01:13,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 10:01:13,500 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2021-10-28 10:01:13,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:01:13,502 INFO L225 Difference]: With dead ends: 245 [2021-10-28 10:01:13,502 INFO L226 Difference]: Without dead ends: 245 [2021-10-28 10:01:13,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-10-28 10:01:13,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-10-28 10:01:13,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 216. [2021-10-28 10:01:13,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 165 states have (on average 1.5575757575757576) internal successors, (257), 195 states have internal predecessors, (257), 12 states have call successors, (12), 10 states have call predecessors, (12), 12 states have return successors, (20), 10 states have call predecessors, (20), 11 states have call successors, (20) [2021-10-28 10:01:13,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 289 transitions. [2021-10-28 10:01:13,513 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 289 transitions. Word has length 46 [2021-10-28 10:01:13,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:01:13,514 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 289 transitions. [2021-10-28 10:01:13,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 10:01:13,514 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 289 transitions. [2021-10-28 10:01:13,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 10:01:13,515 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:01:13,515 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 10:01:13,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-28 10:01:13,516 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting sll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:01:13,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:01:13,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1054966431, now seen corresponding path program 1 times [2021-10-28 10:01:13,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:01:13,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476400441] [2021-10-28 10:01:13,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:13,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:01:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:13,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:01:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:13,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:01:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:13,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:01:13,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:13,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:01:13,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 10:01:13,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:01:13,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476400441] [2021-10-28 10:01:13,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476400441] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 10:01:13,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 10:01:13,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 10:01:13,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683802737] [2021-10-28 10:01:13,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 10:01:13,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:01:13,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 10:01:13,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 10:01:13,629 INFO L87 Difference]: Start difference. First operand 216 states and 289 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 10:01:13,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:01:13,945 INFO L93 Difference]: Finished difference Result 215 states and 285 transitions. [2021-10-28 10:01:13,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 10:01:13,945 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2021-10-28 10:01:13,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:01:13,947 INFO L225 Difference]: With dead ends: 215 [2021-10-28 10:01:13,947 INFO L226 Difference]: Without dead ends: 215 [2021-10-28 10:01:13,948 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-10-28 10:01:13,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-10-28 10:01:13,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2021-10-28 10:01:13,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 165 states have (on average 1.5333333333333334) internal successors, (253), 194 states have internal predecessors, (253), 12 states have call successors, (12), 10 states have call predecessors, (12), 12 states have return successors, (20), 10 states have call predecessors, (20), 11 states have call successors, (20) [2021-10-28 10:01:13,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 285 transitions. [2021-10-28 10:01:13,957 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 285 transitions. Word has length 47 [2021-10-28 10:01:13,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:01:13,957 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 285 transitions. [2021-10-28 10:01:13,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 10:01:13,958 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 285 transitions. [2021-10-28 10:01:13,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-28 10:01:13,958 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:01:13,959 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 10:01:13,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-28 10:01:13,959 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting sll_circular_remove_firstErr11REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:01:13,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:01:13,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1655778863, now seen corresponding path program 1 times [2021-10-28 10:01:13,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:01:13,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208153650] [2021-10-28 10:01:13,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:13,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:01:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:14,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:01:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:14,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:01:14,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:14,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:01:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:14,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:01:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:14,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 10:01:14,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:01:14,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208153650] [2021-10-28 10:01:14,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208153650] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 10:01:14,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 10:01:14,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-10-28 10:01:14,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499443878] [2021-10-28 10:01:14,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 10:01:14,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:01:14,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 10:01:14,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-10-28 10:01:14,228 INFO L87 Difference]: Start difference. First operand 215 states and 285 transitions. Second operand has 18 states, 16 states have (on average 2.375) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 10:01:15,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:01:15,119 INFO L93 Difference]: Finished difference Result 242 states and 313 transitions. [2021-10-28 10:01:15,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 10:01:15,120 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2021-10-28 10:01:15,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:01:15,122 INFO L225 Difference]: With dead ends: 242 [2021-10-28 10:01:15,122 INFO L226 Difference]: Without dead ends: 242 [2021-10-28 10:01:15,123 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2021-10-28 10:01:15,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-10-28 10:01:15,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 219. [2021-10-28 10:01:15,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 169 states have (on average 1.5266272189349113) internal successors, (258), 198 states have internal predecessors, (258), 12 states have call successors, (12), 10 states have call predecessors, (12), 12 states have return successors, (20), 10 states have call predecessors, (20), 11 states have call successors, (20) [2021-10-28 10:01:15,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 290 transitions. [2021-10-28 10:01:15,134 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 290 transitions. Word has length 48 [2021-10-28 10:01:15,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:01:15,134 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 290 transitions. [2021-10-28 10:01:15,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 10:01:15,135 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 290 transitions. [2021-10-28 10:01:15,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 10:01:15,136 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:01:15,136 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-10-28 10:01:15,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-28 10:01:15,136 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting sll_circular_remove_firstErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:01:15,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:01:15,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1103929599, now seen corresponding path program 2 times [2021-10-28 10:01:15,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:01:15,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949883036] [2021-10-28 10:01:15,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:15,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:01:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:15,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:01:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:15,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:01:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:15,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:01:15,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:15,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:01:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:15,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-28 10:01:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:15,267 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-28 10:01:15,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:01:15,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949883036] [2021-10-28 10:01:15,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949883036] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:01:15,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267572033] [2021-10-28 10:01:15,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 10:01:15,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:01:15,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 10:01:15,271 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 10:01:15,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 10:01:15,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 10:01:15,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 10:01:15,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 10:01:15,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 10:01:15,731 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-28 10:01:15,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267572033] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:01:15,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 10:01:15,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-10-28 10:01:15,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834721075] [2021-10-28 10:01:15,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 10:01:15,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:01:15,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 10:01:15,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-28 10:01:15,733 INFO L87 Difference]: Start difference. First operand 219 states and 290 transitions. Second operand has 10 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 7 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 10:01:16,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:01:16,046 INFO L93 Difference]: Finished difference Result 133 states and 155 transitions. [2021-10-28 10:01:16,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 10:01:16,047 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 7 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 51 [2021-10-28 10:01:16,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:01:16,048 INFO L225 Difference]: With dead ends: 133 [2021-10-28 10:01:16,048 INFO L226 Difference]: Without dead ends: 124 [2021-10-28 10:01:16,048 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-10-28 10:01:16,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-28 10:01:16,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-10-28 10:01:16,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 92 states have (on average 1.358695652173913) internal successors, (125), 110 states have internal predecessors, (125), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2021-10-28 10:01:16,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 144 transitions. [2021-10-28 10:01:16,053 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 144 transitions. Word has length 51 [2021-10-28 10:01:16,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:01:16,054 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 144 transitions. [2021-10-28 10:01:16,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 7 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 10:01:16,054 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 144 transitions. [2021-10-28 10:01:16,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 10:01:16,054 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:01:16,055 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 10:01:16,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 10:01:16,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:01:16,255 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting sll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:01:16,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:01:16,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1386580709, now seen corresponding path program 1 times [2021-10-28 10:01:16,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:01:16,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624800352] [2021-10-28 10:01:16,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:16,256 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:01:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:16,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:01:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:16,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:01:16,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:16,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:01:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:16,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:01:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:16,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 10:01:16,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:01:16,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624800352] [2021-10-28 10:01:16,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624800352] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 10:01:16,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 10:01:16,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-28 10:01:16,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860251678] [2021-10-28 10:01:16,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 10:01:16,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:01:16,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 10:01:16,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-10-28 10:01:16,506 INFO L87 Difference]: Start difference. First operand 124 states and 144 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 10:01:17,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:01:17,231 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2021-10-28 10:01:17,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 10:01:17,232 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2021-10-28 10:01:17,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:01:17,233 INFO L225 Difference]: With dead ends: 122 [2021-10-28 10:01:17,233 INFO L226 Difference]: Without dead ends: 122 [2021-10-28 10:01:17,233 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-10-28 10:01:17,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-28 10:01:17,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 118. [2021-10-28 10:01:17,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 87 states have (on average 1.3218390804597702) internal successors, (115), 104 states have internal predecessors, (115), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2021-10-28 10:01:17,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 133 transitions. [2021-10-28 10:01:17,238 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 133 transitions. Word has length 51 [2021-10-28 10:01:17,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:01:17,238 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 133 transitions. [2021-10-28 10:01:17,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-28 10:01:17,239 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 133 transitions. [2021-10-28 10:01:17,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 10:01:17,239 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:01:17,240 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 10:01:17,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-28 10:01:17,240 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting sll_circular_remove_firstErr15REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:01:17,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:01:17,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1386528094, now seen corresponding path program 1 times [2021-10-28 10:01:17,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:01:17,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863132043] [2021-10-28 10:01:17,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:17,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:01:17,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:17,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:01:17,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:17,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:01:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:17,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:01:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:17,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:01:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 10:01:17,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:01:17,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863132043] [2021-10-28 10:01:17,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863132043] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:01:17,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419900550] [2021-10-28 10:01:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:17,768 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:01:17,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 10:01:17,772 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 10:01:17,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 10:01:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:18,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 80 conjunts are in the unsatisfiable core [2021-10-28 10:01:18,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 10:01:18,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 10:01:18,342 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 10:01:18,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 10:01:18,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 10:01:18,568 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 10:01:18,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-10-28 10:01:19,311 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 70 treesize of output 62 [2021-10-28 10:01:19,591 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-10-28 10:01:19,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 26 [2021-10-28 10:01:19,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 10:01:19,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419900550] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:01:19,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 10:01:19,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 40 [2021-10-28 10:01:19,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926789132] [2021-10-28 10:01:19,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-28 10:01:19,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:01:19,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-28 10:01:19,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1542, Unknown=0, NotChecked=0, Total=1640 [2021-10-28 10:01:19,610 INFO L87 Difference]: Start difference. First operand 118 states and 133 transitions. Second operand has 41 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 31 states have internal predecessors, (74), 5 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 10:01:21,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:01:21,871 INFO L93 Difference]: Finished difference Result 131 states and 147 transitions. [2021-10-28 10:01:21,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 10:01:21,871 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 31 states have internal predecessors, (74), 5 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 51 [2021-10-28 10:01:21,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:01:21,872 INFO L225 Difference]: With dead ends: 131 [2021-10-28 10:01:21,872 INFO L226 Difference]: Without dead ends: 131 [2021-10-28 10:01:21,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=282, Invalid=3140, Unknown=0, NotChecked=0, Total=3422 [2021-10-28 10:01:21,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-28 10:01:21,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 120. [2021-10-28 10:01:21,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 106 states have internal predecessors, (118), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2021-10-28 10:01:21,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 136 transitions. [2021-10-28 10:01:21,878 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 136 transitions. Word has length 51 [2021-10-28 10:01:21,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:01:21,879 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 136 transitions. [2021-10-28 10:01:21,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 31 states have internal predecessors, (74), 5 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 10:01:21,879 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 136 transitions. [2021-10-28 10:01:21,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 10:01:21,880 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:01:21,880 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 10:01:21,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-28 10:01:22,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-28 10:01:22,096 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting sll_circular_remove_firstErr16REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:01:22,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:01:22,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1386528093, now seen corresponding path program 1 times [2021-10-28 10:01:22,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:01:22,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971862554] [2021-10-28 10:01:22,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:22,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:01:22,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:22,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:01:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:22,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:01:22,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:22,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:01:22,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:23,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:01:23,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:23,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 10:01:23,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:01:23,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971862554] [2021-10-28 10:01:23,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971862554] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:01:23,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133591994] [2021-10-28 10:01:23,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:23,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:01:23,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 10:01:23,204 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 10:01:23,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 10:01:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:23,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 100 conjunts are in the unsatisfiable core [2021-10-28 10:01:23,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 10:01:23,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 10:01:23,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 10:01:24,111 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 10:01:24,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 10:01:24,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-10-28 10:01:24,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 10:01:24,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 10:01:24,578 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-28 10:01:24,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-10-28 10:01:24,590 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 10:01:24,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-10-28 10:01:26,020 INFO L354 Elim1Store]: treesize reduction 61, result has 11.6 percent of original size [2021-10-28 10:01:26,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 121 treesize of output 66 [2021-10-28 10:01:26,043 INFO L354 Elim1Store]: treesize reduction 54, result has 5.3 percent of original size [2021-10-28 10:01:26,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 37 [2021-10-28 10:01:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 10:01:26,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133591994] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:01:26,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 10:01:26,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 48 [2021-10-28 10:01:26,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730119774] [2021-10-28 10:01:26,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-28 10:01:26,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:01:26,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-28 10:01:26,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2214, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 10:01:26,208 INFO L87 Difference]: Start difference. First operand 120 states and 136 transitions. Second operand has 49 states, 47 states have (on average 1.6595744680851063) internal successors, (78), 39 states have internal predecessors, (78), 6 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 10:01:29,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:01:29,285 INFO L93 Difference]: Finished difference Result 146 states and 163 transitions. [2021-10-28 10:01:29,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 10:01:29,286 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 1.6595744680851063) internal successors, (78), 39 states have internal predecessors, (78), 6 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 51 [2021-10-28 10:01:29,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:01:29,288 INFO L225 Difference]: With dead ends: 146 [2021-10-28 10:01:29,288 INFO L226 Difference]: Without dead ends: 146 [2021-10-28 10:01:29,290 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=364, Invalid=4058, Unknown=0, NotChecked=0, Total=4422 [2021-10-28 10:01:29,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-28 10:01:29,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 131. [2021-10-28 10:01:29,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 99 states have (on average 1.3333333333333333) internal successors, (132), 117 states have internal predecessors, (132), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2021-10-28 10:01:29,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 151 transitions. [2021-10-28 10:01:29,297 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 151 transitions. Word has length 51 [2021-10-28 10:01:29,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:01:29,298 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 151 transitions. [2021-10-28 10:01:29,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 1.6595744680851063) internal successors, (78), 39 states have internal predecessors, (78), 6 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 10:01:29,299 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 151 transitions. [2021-10-28 10:01:29,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-28 10:01:29,299 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:01:29,300 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:01:29,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 10:01:29,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:01:29,516 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:01:29,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:01:29,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1807125059, now seen corresponding path program 1 times [2021-10-28 10:01:29,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:01:29,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095788963] [2021-10-28 10:01:29,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:29,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:01:29,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:29,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:01:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:29,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:01:29,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:29,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:01:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:29,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:01:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:29,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 10:01:29,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 10:01:29,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:01:29,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095788963] [2021-10-28 10:01:29,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095788963] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 10:01:29,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 10:01:29,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 10:01:29,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818107121] [2021-10-28 10:01:29,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 10:01:29,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:01:29,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 10:01:29,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-28 10:01:29,635 INFO L87 Difference]: Start difference. First operand 131 states and 151 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-10-28 10:01:29,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:01:29,968 INFO L93 Difference]: Finished difference Result 129 states and 148 transitions. [2021-10-28 10:01:29,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 10:01:29,969 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 53 [2021-10-28 10:01:29,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:01:29,970 INFO L225 Difference]: With dead ends: 129 [2021-10-28 10:01:29,971 INFO L226 Difference]: Without dead ends: 129 [2021-10-28 10:01:29,971 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-10-28 10:01:29,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-10-28 10:01:29,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-10-28 10:01:29,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 99 states have (on average 1.303030303030303) internal successors, (129), 115 states have internal predecessors, (129), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2021-10-28 10:01:29,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 148 transitions. [2021-10-28 10:01:29,977 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 148 transitions. Word has length 53 [2021-10-28 10:01:29,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:01:29,978 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 148 transitions. [2021-10-28 10:01:29,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-10-28 10:01:29,978 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 148 transitions. [2021-10-28 10:01:29,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 10:01:29,979 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:01:29,980 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:01:29,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-28 10:01:29,980 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr2ASSERT_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:01:29,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:01:29,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1480393345, now seen corresponding path program 1 times [2021-10-28 10:01:29,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:01:29,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828793449] [2021-10-28 10:01:29,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:29,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:01:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:30,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:01:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:30,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:01:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:30,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:01:30,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:30,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:01:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:30,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 10:01:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:30,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 10:01:30,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:01:30,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828793449] [2021-10-28 10:01:30,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828793449] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:01:30,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765646881] [2021-10-28 10:01:30,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:30,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:01:30,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 10:01:30,119 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 10:01:30,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 10:01:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:30,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 10:01:30,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 10:01:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 10:01:30,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765646881] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:01:30,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 10:01:30,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-10-28 10:01:30,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883632244] [2021-10-28 10:01:30,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 10:01:30,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:01:30,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 10:01:30,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-28 10:01:30,735 INFO L87 Difference]: Start difference. First operand 129 states and 148 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 8 states have internal predecessors, (47), 5 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-28 10:01:30,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:01:30,966 INFO L93 Difference]: Finished difference Result 133 states and 152 transitions. [2021-10-28 10:01:30,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 10:01:30,972 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 8 states have internal predecessors, (47), 5 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 55 [2021-10-28 10:01:30,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:01:30,973 INFO L225 Difference]: With dead ends: 133 [2021-10-28 10:01:30,973 INFO L226 Difference]: Without dead ends: 133 [2021-10-28 10:01:30,974 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-10-28 10:01:30,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-28 10:01:30,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-10-28 10:01:30,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 103 states have (on average 1.2912621359223302) internal successors, (133), 117 states have internal predecessors, (133), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2021-10-28 10:01:30,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2021-10-28 10:01:30,982 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 55 [2021-10-28 10:01:30,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:01:30,982 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2021-10-28 10:01:30,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 8 states have internal predecessors, (47), 5 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-28 10:01:30,983 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2021-10-28 10:01:30,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-28 10:01:30,984 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:01:30,984 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 10:01:31,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 10:01:31,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:01:31,203 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting sll_circular_remove_firstErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:01:31,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:01:31,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1357843693, now seen corresponding path program 1 times [2021-10-28 10:01:31,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:01:31,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214681908] [2021-10-28 10:01:31,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:31,204 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:01:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:31,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:01:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:31,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:01:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:31,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:01:31,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:31,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:01:31,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:31,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 10:01:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:32,122 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 10:01:32,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:01:32,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214681908] [2021-10-28 10:01:32,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214681908] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:01:32,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506257384] [2021-10-28 10:01:32,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:32,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:01:32,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 10:01:32,128 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 10:01:32,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 10:01:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:32,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 79 conjunts are in the unsatisfiable core [2021-10-28 10:01:32,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 10:01:32,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 10:01:33,023 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 10:01:33,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 10:01:33,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-28 10:01:33,305 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 10:01:33,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 28 [2021-10-28 10:01:34,019 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 27 treesize of output 19 [2021-10-28 10:01:34,113 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-10-28 10:01:34,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 1 [2021-10-28 10:01:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 10:01:34,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506257384] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:01:34,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 10:01:34,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 49 [2021-10-28 10:01:34,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634735958] [2021-10-28 10:01:34,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-28 10:01:34,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:01:34,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-28 10:01:34,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2208, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 10:01:34,128 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand has 49 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 38 states have internal predecessors, (76), 7 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2021-10-28 10:01:35,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:01:35,935 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2021-10-28 10:01:35,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 10:01:35,937 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 38 states have internal predecessors, (76), 7 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) Word has length 56 [2021-10-28 10:01:35,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:01:35,938 INFO L225 Difference]: With dead ends: 117 [2021-10-28 10:01:35,938 INFO L226 Difference]: Without dead ends: 110 [2021-10-28 10:01:35,940 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=345, Invalid=4211, Unknown=0, NotChecked=0, Total=4556 [2021-10-28 10:01:35,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-28 10:01:35,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-10-28 10:01:35,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.2804878048780488) internal successors, (105), 97 states have internal predecessors, (105), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 10:01:35,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2021-10-28 10:01:35,946 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 56 [2021-10-28 10:01:35,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:01:35,946 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2021-10-28 10:01:35,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 38 states have internal predecessors, (76), 7 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2021-10-28 10:01:35,947 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2021-10-28 10:01:35,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-28 10:01:35,948 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:01:35,948 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:01:35,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 10:01:36,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:01:36,168 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting sll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:01:36,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:01:36,168 INFO L85 PathProgramCache]: Analyzing trace with hash 761567980, now seen corresponding path program 1 times [2021-10-28 10:01:36,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:01:36,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874545928] [2021-10-28 10:01:36,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:36,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:01:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:36,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:01:36,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:36,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:01:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:36,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:01:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:36,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:01:36,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 10:01:36,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:01:36,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874545928] [2021-10-28 10:01:36,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874545928] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:01:36,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595850140] [2021-10-28 10:01:36,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:36,925 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:01:36,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 10:01:36,926 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 10:01:36,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 10:01:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:37,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 81 conjunts are in the unsatisfiable core [2021-10-28 10:01:37,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 10:01:37,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 10:01:37,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-10-28 10:01:37,749 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 10:01:37,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 10:01:37,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 10:01:38,044 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 10:01:38,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-10-28 10:01:39,178 INFO L354 Elim1Store]: treesize reduction 52, result has 13.3 percent of original size [2021-10-28 10:01:39,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 29 [2021-10-28 10:01:39,383 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 10:01:39,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-10-28 10:01:39,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 10:01:39,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 10:01:39,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595850140] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:01:39,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 10:01:39,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25] total 50 [2021-10-28 10:01:39,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079947201] [2021-10-28 10:01:39,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-28 10:01:39,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:01:39,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-28 10:01:39,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2415, Unknown=0, NotChecked=0, Total=2550 [2021-10-28 10:01:39,458 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand has 51 states, 48 states have (on average 1.8125) internal successors, (87), 41 states have internal predecessors, (87), 8 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-28 10:01:42,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:01:42,323 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2021-10-28 10:01:42,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 10:01:42,324 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.8125) internal successors, (87), 41 states have internal predecessors, (87), 8 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 56 [2021-10-28 10:01:42,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:01:42,325 INFO L225 Difference]: With dead ends: 124 [2021-10-28 10:01:42,325 INFO L226 Difference]: Without dead ends: 124 [2021-10-28 10:01:42,328 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=352, Invalid=5198, Unknown=0, NotChecked=0, Total=5550 [2021-10-28 10:01:42,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-28 10:01:42,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2021-10-28 10:01:42,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 97 states have internal predecessors, (104), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 10:01:42,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 119 transitions. [2021-10-28 10:01:42,333 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 119 transitions. Word has length 56 [2021-10-28 10:01:42,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:01:42,333 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 119 transitions. [2021-10-28 10:01:42,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.8125) internal successors, (87), 41 states have internal predecessors, (87), 8 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-28 10:01:42,334 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 119 transitions. [2021-10-28 10:01:42,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-28 10:01:42,335 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:01:42,335 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 10:01:42,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 10:01:42,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-28 10:01:42,535 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting sll_circular_remove_firstErr15REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:01:42,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:01:42,536 INFO L85 PathProgramCache]: Analyzing trace with hash 761620595, now seen corresponding path program 2 times [2021-10-28 10:01:42,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:01:42,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010952540] [2021-10-28 10:01:42,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:42,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:01:42,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:42,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:01:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:42,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:01:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:43,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:01:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:43,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:01:43,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:43,580 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 10:01:43,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:01:43,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010952540] [2021-10-28 10:01:43,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010952540] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:01:43,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742287791] [2021-10-28 10:01:43,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 10:01:43,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:01:43,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 10:01:43,588 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 10:01:43,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 10:01:44,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 10:01:44,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 10:01:44,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 102 conjunts are in the unsatisfiable core [2021-10-28 10:01:44,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 10:01:44,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 10:01:44,581 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 10:01:44,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 10:01:44,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 10:01:44,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 10:01:44,917 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-28 10:01:44,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-10-28 10:01:44,932 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 10:01:44,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-10-28 10:01:46,075 INFO L354 Elim1Store]: treesize reduction 94, result has 3.1 percent of original size [2021-10-28 10:01:46,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 121 treesize of output 87 [2021-10-28 10:01:46,432 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-10-28 10:01:46,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 31 [2021-10-28 10:01:46,605 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 10:01:46,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742287791] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:01:46,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 10:01:46,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 25] total 51 [2021-10-28 10:01:46,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126136858] [2021-10-28 10:01:46,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-28 10:01:46,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:01:46,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-28 10:01:46,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 10:01:46,608 INFO L87 Difference]: Start difference. First operand 110 states and 119 transitions. Second operand has 52 states, 50 states have (on average 1.72) internal successors, (86), 42 states have internal predecessors, (86), 5 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 10:01:50,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:01:50,201 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2021-10-28 10:01:50,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 10:01:50,202 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 1.72) internal successors, (86), 42 states have internal predecessors, (86), 5 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 56 [2021-10-28 10:01:50,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:01:50,203 INFO L225 Difference]: With dead ends: 130 [2021-10-28 10:01:50,203 INFO L226 Difference]: Without dead ends: 130 [2021-10-28 10:01:50,205 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=434, Invalid=4678, Unknown=0, NotChecked=0, Total=5112 [2021-10-28 10:01:50,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-28 10:01:50,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 112. [2021-10-28 10:01:50,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 84 states have (on average 1.2738095238095237) internal successors, (107), 99 states have internal predecessors, (107), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 10:01:50,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2021-10-28 10:01:50,210 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 56 [2021-10-28 10:01:50,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:01:50,211 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2021-10-28 10:01:50,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 1.72) internal successors, (86), 42 states have internal predecessors, (86), 5 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 10:01:50,211 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2021-10-28 10:01:50,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-28 10:01:50,212 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:01:50,212 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 10:01:50,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 10:01:50,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 10:01:50,424 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting sll_circular_remove_firstErr16REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:01:50,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:01:50,424 INFO L85 PathProgramCache]: Analyzing trace with hash 761620596, now seen corresponding path program 2 times [2021-10-28 10:01:50,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:01:50,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283155554] [2021-10-28 10:01:50,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:50,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:01:50,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:50,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:01:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:50,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:01:50,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:51,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:01:51,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:51,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:01:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:51,481 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 10:01:51,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:01:51,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283155554] [2021-10-28 10:01:51,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283155554] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:01:51,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358096641] [2021-10-28 10:01:51,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 10:01:51,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:01:51,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 10:01:51,482 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 10:01:51,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 10:01:52,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 10:01:52,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 10:01:52,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 103 conjunts are in the unsatisfiable core [2021-10-28 10:01:52,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 10:01:52,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 10:01:52,406 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 10:01:52,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 10:01:52,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 10:01:52,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 10:01:52,658 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-28 10:01:52,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 40 [2021-10-28 10:01:52,666 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 10:01:52,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 41 [2021-10-28 10:01:54,147 INFO L354 Elim1Store]: treesize reduction 110, result has 9.1 percent of original size [2021-10-28 10:01:54,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 145 treesize of output 87 [2021-10-28 10:01:54,177 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-10-28 10:01:54,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 39 [2021-10-28 10:01:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 10:01:54,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358096641] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:01:54,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 10:01:54,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26] total 49 [2021-10-28 10:01:54,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740428165] [2021-10-28 10:01:54,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-28 10:01:54,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:01:54,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-28 10:01:54,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2214, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 10:01:54,243 INFO L87 Difference]: Start difference. First operand 112 states and 122 transitions. Second operand has 49 states, 48 states have (on average 1.625) internal successors, (78), 39 states have internal predecessors, (78), 5 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 10:01:56,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:01:56,814 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2021-10-28 10:01:56,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-28 10:01:56,814 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.625) internal successors, (78), 39 states have internal predecessors, (78), 5 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 56 [2021-10-28 10:01:56,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:01:56,815 INFO L225 Difference]: With dead ends: 109 [2021-10-28 10:01:56,815 INFO L226 Difference]: Without dead ends: 109 [2021-10-28 10:01:56,817 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=356, Invalid=4066, Unknown=0, NotChecked=0, Total=4422 [2021-10-28 10:01:56,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-28 10:01:56,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2021-10-28 10:01:56,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 80 states have (on average 1.2625) internal successors, (101), 94 states have internal predecessors, (101), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-28 10:01:56,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2021-10-28 10:01:56,821 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 56 [2021-10-28 10:01:56,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:01:56,821 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2021-10-28 10:01:56,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.625) internal successors, (78), 39 states have internal predecessors, (78), 5 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-10-28 10:01:56,822 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2021-10-28 10:01:56,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-28 10:01:56,822 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:01:56,823 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:01:56,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 10:01:57,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 10:01:57,036 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting sll_circular_remove_firstErr26ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:01:57,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:01:57,036 INFO L85 PathProgramCache]: Analyzing trace with hash 2133771082, now seen corresponding path program 1 times [2021-10-28 10:01:57,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:01:57,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002749446] [2021-10-28 10:01:57,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:57,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:01:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:57,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:01:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:57,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:01:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:57,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:01:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:57,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:01:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 10:01:57,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:01:57,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002749446] [2021-10-28 10:01:57,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002749446] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:01:57,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700485931] [2021-10-28 10:01:57,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:01:57,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:01:57,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 10:01:57,835 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 10:01:57,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 10:01:58,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:01:58,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 81 conjunts are in the unsatisfiable core [2021-10-28 10:01:58,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 10:01:58,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 10:01:58,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-10-28 10:01:59,013 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 10:01:59,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 10:01:59,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 10:01:59,384 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 10:01:59,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-10-28 10:02:00,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 10:02:01,131 INFO L354 Elim1Store]: treesize reduction 156, result has 15.7 percent of original size [2021-10-28 10:02:01,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 81 treesize of output 61 [2021-10-28 10:02:01,264 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-28 10:02:01,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 20 [2021-10-28 10:02:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 10:02:01,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700485931] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:02:01,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 10:02:01,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25] total 51 [2021-10-28 10:02:01,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915717778] [2021-10-28 10:02:01,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-28 10:02:01,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:02:01,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-28 10:02:01,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2516, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 10:02:01,292 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand has 52 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 42 states have internal predecessors, (91), 8 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-28 10:02:05,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:02:05,238 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2021-10-28 10:02:05,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 10:02:05,239 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 42 states have internal predecessors, (91), 8 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 57 [2021-10-28 10:02:05,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:02:05,240 INFO L225 Difference]: With dead ends: 109 [2021-10-28 10:02:05,240 INFO L226 Difference]: Without dead ends: 109 [2021-10-28 10:02:05,242 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=359, Invalid=5191, Unknown=0, NotChecked=0, Total=5550 [2021-10-28 10:02:05,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-28 10:02:05,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2021-10-28 10:02:05,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 80 states have (on average 1.25) internal successors, (100), 94 states have internal predecessors, (100), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-28 10:02:05,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 113 transitions. [2021-10-28 10:02:05,246 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 113 transitions. Word has length 57 [2021-10-28 10:02:05,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:02:05,246 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 113 transitions. [2021-10-28 10:02:05,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 42 states have internal predecessors, (91), 8 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-28 10:02:05,247 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 113 transitions. [2021-10-28 10:02:05,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-28 10:02:05,248 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:02:05,248 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:02:05,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 10:02:05,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 10:02:05,464 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting sll_circular_remove_firstErr27ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:02:05,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:02:05,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1722394286, now seen corresponding path program 1 times [2021-10-28 10:02:05,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:02:05,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493721728] [2021-10-28 10:02:05,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:02:05,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:02:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:02:05,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:02:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:02:05,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:02:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:02:06,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:02:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:02:06,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:02:06,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:02:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 10:02:06,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:02:06,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493721728] [2021-10-28 10:02:06,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493721728] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:02:06,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093898569] [2021-10-28 10:02:06,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:02:06,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:02:06,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 10:02:06,256 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 10:02:06,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 10:02:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:02:06,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 83 conjunts are in the unsatisfiable core [2021-10-28 10:02:06,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 10:02:07,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 10:02:07,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-10-28 10:02:07,388 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 10:02:07,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 10:02:07,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 10:02:07,652 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 10:02:07,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-10-28 10:02:08,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 10:02:09,339 INFO L354 Elim1Store]: treesize reduction 215, result has 13.0 percent of original size [2021-10-28 10:02:09,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 85 treesize of output 68 [2021-10-28 10:02:09,425 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 10:02:09,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 25 [2021-10-28 10:02:09,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 10:02:09,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093898569] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:02:09,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 10:02:09,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27] total 53 [2021-10-28 10:02:09,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568807801] [2021-10-28 10:02:09,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-10-28 10:02:09,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:02:09,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-10-28 10:02:09,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2723, Unknown=0, NotChecked=0, Total=2862 [2021-10-28 10:02:09,445 INFO L87 Difference]: Start difference. First operand 107 states and 113 transitions. Second operand has 54 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 44 states have internal predecessors, (91), 8 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-28 10:02:13,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:02:13,466 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2021-10-28 10:02:13,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 10:02:13,467 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 44 states have internal predecessors, (91), 8 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 58 [2021-10-28 10:02:13,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:02:13,468 INFO L225 Difference]: With dead ends: 107 [2021-10-28 10:02:13,468 INFO L226 Difference]: Without dead ends: 107 [2021-10-28 10:02:13,469 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=362, Invalid=5490, Unknown=0, NotChecked=0, Total=5852 [2021-10-28 10:02:13,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-28 10:02:13,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-10-28 10:02:13,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 80 states have (on average 1.2375) internal successors, (99), 94 states have internal predecessors, (99), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-28 10:02:13,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2021-10-28 10:02:13,474 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 58 [2021-10-28 10:02:13,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:02:13,475 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2021-10-28 10:02:13,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 44 states have internal predecessors, (91), 8 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-28 10:02:13,475 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2021-10-28 10:02:13,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-28 10:02:13,476 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:02:13,476 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:02:13,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 10:02:13,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:02:13,677 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting sll_circular_remove_firstErr28REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:02:13,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:02:13,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1854615501, now seen corresponding path program 1 times [2021-10-28 10:02:13,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:02:13,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616864299] [2021-10-28 10:02:13,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:02:13,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:02:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:02:13,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:02:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:02:13,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:02:13,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:02:13,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:02:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:02:13,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:02:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:02:13,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-28 10:02:13,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:02:13,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616864299] [2021-10-28 10:02:13,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616864299] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 10:02:13,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 10:02:13,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 10:02:13,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275174010] [2021-10-28 10:02:13,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 10:02:13,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:02:13,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 10:02:13,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-28 10:02:13,949 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand has 11 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 10:02:14,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:02:14,292 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2021-10-28 10:02:14,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 10:02:14,292 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2021-10-28 10:02:14,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:02:14,293 INFO L225 Difference]: With dead ends: 106 [2021-10-28 10:02:14,293 INFO L226 Difference]: Without dead ends: 106 [2021-10-28 10:02:14,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-10-28 10:02:14,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-28 10:02:14,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-10-28 10:02:14,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 80 states have (on average 1.2125) internal successors, (97), 93 states have internal predecessors, (97), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-28 10:02:14,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2021-10-28 10:02:14,297 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 59 [2021-10-28 10:02:14,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:02:14,298 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2021-10-28 10:02:14,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 10:02:14,298 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2021-10-28 10:02:14,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-28 10:02:14,299 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:02:14,299 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 10:02:14,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-28 10:02:14,300 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting sll_circular_remove_firstErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:02:14,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:02:14,300 INFO L85 PathProgramCache]: Analyzing trace with hash -170152215, now seen corresponding path program 1 times [2021-10-28 10:02:14,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:02:14,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193087063] [2021-10-28 10:02:14,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:02:14,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:02:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:02:14,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:02:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:02:14,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:02:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:02:14,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:02:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:02:14,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:02:14,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:02:14,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 10:02:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:02:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 10:02:16,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:02:16,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193087063] [2021-10-28 10:02:16,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193087063] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:02:16,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693507051] [2021-10-28 10:02:16,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:02:16,180 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:02:16,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 10:02:16,200 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 10:02:16,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 10:02:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:02:17,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 108 conjunts are in the unsatisfiable core [2021-10-28 10:02:17,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 10:02:17,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 10:02:17,425 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 10:02:17,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 10:02:17,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 10:02:17,664 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-28 10:02:17,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-10-28 10:02:18,812 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-28 10:02:18,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 85 [2021-10-28 10:02:20,186 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 82 treesize of output 74 [2021-10-28 10:02:20,773 INFO L354 Elim1Store]: treesize reduction 31, result has 48.3 percent of original size [2021-10-28 10:02:20,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 99 [2021-10-28 10:02:21,710 INFO L354 Elim1Store]: treesize reduction 203, result has 17.8 percent of original size [2021-10-28 10:02:21,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 256 treesize of output 132 [2021-10-28 10:02:35,263 INFO L354 Elim1Store]: treesize reduction 85, result has 19.0 percent of original size [2021-10-28 10:02:35,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 149 treesize of output 107 [2021-10-28 10:02:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 10:02:35,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693507051] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:02:35,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 10:02:35,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 36] total 72 [2021-10-28 10:02:35,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652539077] [2021-10-28 10:02:35,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-10-28 10:02:35,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:02:35,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-10-28 10:02:35,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=5019, Unknown=3, NotChecked=0, Total=5256 [2021-10-28 10:02:35,498 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 73 states, 70 states have (on average 1.4857142857142858) internal successors, (104), 61 states have internal predecessors, (104), 10 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-10-28 10:03:33,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:03:33,882 INFO L93 Difference]: Finished difference Result 172 states and 181 transitions. [2021-10-28 10:03:33,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-10-28 10:03:33,883 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 70 states have (on average 1.4857142857142858) internal successors, (104), 61 states have internal predecessors, (104), 10 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 67 [2021-10-28 10:03:33,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:03:33,885 INFO L225 Difference]: With dead ends: 172 [2021-10-28 10:03:33,885 INFO L226 Difference]: Without dead ends: 172 [2021-10-28 10:03:33,887 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3073 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=1013, Invalid=13730, Unknown=19, NotChecked=0, Total=14762 [2021-10-28 10:03:33,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-10-28 10:03:33,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 120. [2021-10-28 10:03:33,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 93 states have (on average 1.2688172043010753) internal successors, (118), 106 states have internal predecessors, (118), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-28 10:03:33,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 133 transitions. [2021-10-28 10:03:33,892 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 133 transitions. Word has length 67 [2021-10-28 10:03:33,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:03:33,893 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 133 transitions. [2021-10-28 10:03:33,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 70 states have (on average 1.4857142857142858) internal successors, (104), 61 states have internal predecessors, (104), 10 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-10-28 10:03:33,893 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 133 transitions. [2021-10-28 10:03:33,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-28 10:03:33,894 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:03:33,894 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 10:03:33,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 10:03:34,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:03:34,100 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting sll_circular_remove_firstErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:03:34,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:03:34,100 INFO L85 PathProgramCache]: Analyzing trace with hash -170152214, now seen corresponding path program 1 times [2021-10-28 10:03:34,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:03:34,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681436487] [2021-10-28 10:03:34,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:03:34,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:03:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:03:34,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:03:34,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:03:34,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:03:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:03:34,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:03:34,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:03:34,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:03:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:03:34,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 10:03:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:03:35,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 10:03:35,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:03:35,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681436487] [2021-10-28 10:03:35,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681436487] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:03:35,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973253804] [2021-10-28 10:03:35,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:03:35,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:03:35,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 10:03:35,807 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 10:03:35,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 10:03:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:03:36,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-28 10:03:36,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 10:03:37,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 10:03:37,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 48 [2021-10-28 10:03:37,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 10:03:37,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 37 [2021-10-28 10:03:37,704 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 33 treesize of output 29 [2021-10-28 10:03:37,709 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 30 treesize of output 26 [2021-10-28 10:03:37,991 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 37 treesize of output 29 [2021-10-28 10:03:37,993 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 26 treesize of output 14 [2021-10-28 10:03:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 10:03:38,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973253804] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:03:38,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 10:03:38,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 16] total 49 [2021-10-28 10:03:38,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686942910] [2021-10-28 10:03:38,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-10-28 10:03:38,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:03:38,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-10-28 10:03:38,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2311, Unknown=0, NotChecked=0, Total=2450 [2021-10-28 10:03:38,050 INFO L87 Difference]: Start difference. First operand 120 states and 133 transitions. Second operand has 50 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 42 states have internal predecessors, (103), 6 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) [2021-10-28 10:03:46,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:03:46,832 INFO L93 Difference]: Finished difference Result 233 states and 248 transitions. [2021-10-28 10:03:46,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-10-28 10:03:46,832 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 42 states have internal predecessors, (103), 6 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) Word has length 67 [2021-10-28 10:03:46,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:03:46,834 INFO L225 Difference]: With dead ends: 233 [2021-10-28 10:03:46,834 INFO L226 Difference]: Without dead ends: 233 [2021-10-28 10:03:46,836 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1083, Invalid=10259, Unknown=0, NotChecked=0, Total=11342 [2021-10-28 10:03:46,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-10-28 10:03:46,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2021-10-28 10:03:46,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 131 states have (on average 1.282442748091603) internal successors, (168), 145 states have internal predecessors, (168), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2021-10-28 10:03:46,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 188 transitions. [2021-10-28 10:03:46,843 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 188 transitions. Word has length 67 [2021-10-28 10:03:46,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:03:46,844 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 188 transitions. [2021-10-28 10:03:46,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 42 states have internal predecessors, (103), 6 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) [2021-10-28 10:03:46,844 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 188 transitions. [2021-10-28 10:03:46,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-10-28 10:03:46,845 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:03:46,845 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 10:03:46,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 10:03:47,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:03:47,064 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting sll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:03:47,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:03:47,064 INFO L85 PathProgramCache]: Analyzing trace with hash -140782016, now seen corresponding path program 1 times [2021-10-28 10:03:47,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:03:47,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829733991] [2021-10-28 10:03:47,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:03:47,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:03:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:03:47,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:03:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:03:47,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:03:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:03:47,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:03:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:03:47,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:03:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:03:47,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 10:03:47,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:03:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-28 10:03:47,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:03:47,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829733991] [2021-10-28 10:03:47,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829733991] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:03:47,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72240543] [2021-10-28 10:03:47,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:03:47,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:03:47,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 10:03:47,804 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 10:03:47,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 10:03:48,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:03:48,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 104 conjunts are in the unsatisfiable core [2021-10-28 10:03:48,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 10:03:49,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 10:03:49,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 10:03:49,378 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 10:03:49,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 42 [2021-10-28 10:03:49,389 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-28 10:03:49,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 39 [2021-10-28 10:03:50,839 INFO L354 Elim1Store]: treesize reduction 56, result has 27.3 percent of original size [2021-10-28 10:03:50,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 250 treesize of output 148 [2021-10-28 10:03:50,916 INFO L354 Elim1Store]: treesize reduction 237, result has 11.2 percent of original size [2021-10-28 10:03:50,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 169 treesize of output 95 [2021-10-28 10:03:51,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 10:03:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 10:03:51,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72240543] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:03:51,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 10:03:51,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 31] total 48 [2021-10-28 10:03:51,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026983438] [2021-10-28 10:03:51,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-28 10:03:51,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:03:51,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-28 10:03:51,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2201, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 10:03:51,192 INFO L87 Difference]: Start difference. First operand 161 states and 188 transitions. Second operand has 49 states, 47 states have (on average 2.0) internal successors, (94), 38 states have internal predecessors, (94), 8 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 10:03:55,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:03:55,506 INFO L93 Difference]: Finished difference Result 221 states and 245 transitions. [2021-10-28 10:03:55,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-28 10:03:55,507 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 2.0) internal successors, (94), 38 states have internal predecessors, (94), 8 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 72 [2021-10-28 10:03:55,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:03:55,509 INFO L225 Difference]: With dead ends: 221 [2021-10-28 10:03:55,509 INFO L226 Difference]: Without dead ends: 221 [2021-10-28 10:03:55,510 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=654, Invalid=7356, Unknown=0, NotChecked=0, Total=8010 [2021-10-28 10:03:55,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-10-28 10:03:55,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 184. [2021-10-28 10:03:55,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 153 states have (on average 1.2745098039215685) internal successors, (195), 168 states have internal predecessors, (195), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2021-10-28 10:03:55,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 215 transitions. [2021-10-28 10:03:55,517 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 215 transitions. Word has length 72 [2021-10-28 10:03:55,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:03:55,517 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 215 transitions. [2021-10-28 10:03:55,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 2.0) internal successors, (94), 38 states have internal predecessors, (94), 8 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 10:03:55,518 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 215 transitions. [2021-10-28 10:03:55,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-10-28 10:03:55,518 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:03:55,519 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 10:03:55,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 10:03:55,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:03:55,719 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting sll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:03:55,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:03:55,720 INFO L85 PathProgramCache]: Analyzing trace with hash -69275061, now seen corresponding path program 1 times [2021-10-28 10:03:55,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:03:55,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888767992] [2021-10-28 10:03:55,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:03:55,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:03:55,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:03:55,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:03:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:03:55,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:03:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:03:56,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:03:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:03:56,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:03:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:03:56,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 10:03:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:03:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 10:03:56,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:03:56,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888767992] [2021-10-28 10:03:56,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888767992] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:03:56,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268169580] [2021-10-28 10:03:56,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:03:56,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:03:56,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 10:03:56,603 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 10:03:56,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 10:03:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:03:57,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 93 conjunts are in the unsatisfiable core [2021-10-28 10:03:57,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 10:03:57,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 10:03:57,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-10-28 10:03:57,966 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 10:03:57,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 10:03:58,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 10:03:58,193 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 10:03:58,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-10-28 10:03:58,550 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-10-28 10:03:58,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 30 [2021-10-28 10:03:59,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-10-28 10:03:59,377 INFO L354 Elim1Store]: treesize reduction 69, result has 10.4 percent of original size [2021-10-28 10:03:59,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 40 [2021-10-28 10:03:59,380 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 17 treesize of output 13 [2021-10-28 10:03:59,572 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 17 treesize of output 9 [2021-10-28 10:03:59,578 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 10:03:59,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268169580] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:03:59,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 10:03:59,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32] total 54 [2021-10-28 10:03:59,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630558850] [2021-10-28 10:03:59,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-10-28 10:03:59,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:03:59,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-10-28 10:03:59,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2805, Unknown=0, NotChecked=0, Total=2970 [2021-10-28 10:03:59,581 INFO L87 Difference]: Start difference. First operand 184 states and 215 transitions. Second operand has 55 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 43 states have internal predecessors, (113), 8 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 10:04:02,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:04:02,759 INFO L93 Difference]: Finished difference Result 201 states and 233 transitions. [2021-10-28 10:04:02,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-28 10:04:02,760 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 43 states have internal predecessors, (113), 8 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 73 [2021-10-28 10:04:02,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:04:02,761 INFO L225 Difference]: With dead ends: 201 [2021-10-28 10:04:02,761 INFO L226 Difference]: Without dead ends: 201 [2021-10-28 10:04:02,762 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=588, Invalid=6552, Unknown=0, NotChecked=0, Total=7140 [2021-10-28 10:04:02,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-10-28 10:04:02,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 187. [2021-10-28 10:04:02,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 156 states have (on average 1.2692307692307692) internal successors, (198), 171 states have internal predecessors, (198), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2021-10-28 10:04:02,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 218 transitions. [2021-10-28 10:04:02,770 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 218 transitions. Word has length 73 [2021-10-28 10:04:02,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:04:02,770 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 218 transitions. [2021-10-28 10:04:02,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 43 states have internal predecessors, (113), 8 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-28 10:04:02,771 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 218 transitions. [2021-10-28 10:04:02,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-28 10:04:02,772 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:04:02,772 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 10:04:02,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 10:04:02,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-28 10:04:02,987 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting sll_circular_remove_firstErr11REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:04:02,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:04:02,988 INFO L85 PathProgramCache]: Analyzing trace with hash 2146147630, now seen corresponding path program 1 times [2021-10-28 10:04:02,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:04:02,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256078580] [2021-10-28 10:04:02,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:04:02,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:04:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:04:03,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:04:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:04:03,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:04:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:04:03,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:04:03,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:04:03,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:04:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:04:03,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 10:04:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:04:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 10:04:03,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:04:03,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256078580] [2021-10-28 10:04:03,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256078580] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:04:03,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000561492] [2021-10-28 10:04:03,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:04:03,756 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:04:03,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 10:04:03,757 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 10:04:03,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 10:04:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:04:04,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 86 conjunts are in the unsatisfiable core [2021-10-28 10:04:04,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 10:04:05,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 10:04:05,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 48 [2021-10-28 10:04:05,742 INFO L354 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2021-10-28 10:04:05,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 51 [2021-10-28 10:04:07,275 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 10 treesize of output 9 [2021-10-28 10:04:07,377 INFO L354 Elim1Store]: treesize reduction 60, result has 39.4 percent of original size [2021-10-28 10:04:07,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 71 [2021-10-28 10:04:07,381 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 79 treesize of output 75 [2021-10-28 10:04:11,997 INFO L354 Elim1Store]: treesize reduction 111, result has 25.5 percent of original size [2021-10-28 10:04:11,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 114 treesize of output 101 [2021-10-28 10:04:12,012 INFO L354 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2021-10-28 10:04:12,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 66 [2021-10-28 10:04:12,239 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-28 10:04:12,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 33 [2021-10-28 10:04:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 10:04:12,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000561492] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:04:12,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 10:04:12,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 44 [2021-10-28 10:04:12,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347505717] [2021-10-28 10:04:12,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-28 10:04:12,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:04:12,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-28 10:04:12,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1831, Unknown=0, NotChecked=0, Total=1980 [2021-10-28 10:04:12,360 INFO L87 Difference]: Start difference. First operand 187 states and 218 transitions. Second operand has 45 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 40 states have internal predecessors, (91), 4 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 10:04:48,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:04:48,955 INFO L93 Difference]: Finished difference Result 305 states and 344 transitions. [2021-10-28 10:04:48,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-10-28 10:04:48,956 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 40 states have internal predecessors, (91), 4 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 75 [2021-10-28 10:04:48,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:04:48,958 INFO L225 Difference]: With dead ends: 305 [2021-10-28 10:04:48,958 INFO L226 Difference]: Without dead ends: 305 [2021-10-28 10:04:48,959 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2455 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=1140, Invalid=8360, Unknown=6, NotChecked=0, Total=9506 [2021-10-28 10:04:48,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-10-28 10:04:48,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 251. [2021-10-28 10:04:48,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 213 states have (on average 1.2863849765258215) internal successors, (274), 231 states have internal predecessors, (274), 11 states have call successors, (11), 10 states have call predecessors, (11), 13 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2021-10-28 10:04:48,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 305 transitions. [2021-10-28 10:04:48,970 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 305 transitions. Word has length 75 [2021-10-28 10:04:48,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:04:48,970 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 305 transitions. [2021-10-28 10:04:48,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 40 states have internal predecessors, (91), 4 states have call successors, (13), 6 states have call predecessors, (13), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 10:04:48,971 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 305 transitions. [2021-10-28 10:04:48,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-28 10:04:48,972 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:04:48,972 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 10:04:49,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-10-28 10:04:49,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:04:49,187 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting sll_circular_remove_firstErr16REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:04:49,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:04:49,188 INFO L85 PathProgramCache]: Analyzing trace with hash -776937946, now seen corresponding path program 1 times [2021-10-28 10:04:49,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:04:49,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373360489] [2021-10-28 10:04:49,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:04:49,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:04:49,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:04:49,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:04:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:04:49,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:04:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:04:49,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:04:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:04:49,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:04:49,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:04:49,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 10:04:49,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:04:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 10:04:50,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:04:50,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373360489] [2021-10-28 10:04:50,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373360489] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:04:50,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898129379] [2021-10-28 10:04:50,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:04:50,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:04:50,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 10:04:50,747 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 10:04:50,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 10:04:51,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:04:51,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 75 conjunts are in the unsatisfiable core [2021-10-28 10:04:51,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 10:04:52,818 INFO L354 Elim1Store]: treesize reduction 68, result has 28.4 percent of original size [2021-10-28 10:04:52,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 84 [2021-10-28 10:04:52,848 INFO L354 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2021-10-28 10:04:52,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 68 [2021-10-28 10:04:53,120 INFO L354 Elim1Store]: treesize reduction 76, result has 38.2 percent of original size [2021-10-28 10:04:53,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 149 treesize of output 120 [2021-10-28 10:04:53,165 INFO L354 Elim1Store]: treesize reduction 76, result has 38.2 percent of original size [2021-10-28 10:04:53,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 141 treesize of output 125 [2021-10-28 10:04:54,059 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-28 10:04:54,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 46 [2021-10-28 10:04:54,063 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 10:04:54,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 16 [2021-10-28 10:04:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-28 10:04:54,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898129379] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:04:54,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 10:04:54,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 20] total 56 [2021-10-28 10:04:54,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631636343] [2021-10-28 10:04:54,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-10-28 10:04:54,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:04:54,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-10-28 10:04:54,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2910, Unknown=0, NotChecked=0, Total=3080 [2021-10-28 10:04:54,076 INFO L87 Difference]: Start difference. First operand 251 states and 305 transitions. Second operand has 56 states, 54 states have (on average 2.240740740740741) internal successors, (121), 49 states have internal predecessors, (121), 8 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-10-28 10:04:58,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:04:58,034 INFO L93 Difference]: Finished difference Result 223 states and 245 transitions. [2021-10-28 10:04:58,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-28 10:04:58,035 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 54 states have (on average 2.240740740740741) internal successors, (121), 49 states have internal predecessors, (121), 8 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 78 [2021-10-28 10:04:58,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:04:58,036 INFO L225 Difference]: With dead ends: 223 [2021-10-28 10:04:58,036 INFO L226 Difference]: Without dead ends: 213 [2021-10-28 10:04:58,037 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=641, Invalid=7191, Unknown=0, NotChecked=0, Total=7832 [2021-10-28 10:04:58,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-10-28 10:04:58,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 200. [2021-10-28 10:04:58,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 164 states have (on average 1.2560975609756098) internal successors, (206), 182 states have internal predecessors, (206), 10 states have call successors, (10), 9 states have call predecessors, (10), 12 states have return successors, (13), 8 states have call predecessors, (13), 9 states have call successors, (13) [2021-10-28 10:04:58,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 229 transitions. [2021-10-28 10:04:58,043 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 229 transitions. Word has length 78 [2021-10-28 10:04:58,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:04:58,043 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 229 transitions. [2021-10-28 10:04:58,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 54 states have (on average 2.240740740740741) internal successors, (121), 49 states have internal predecessors, (121), 8 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-10-28 10:04:58,044 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 229 transitions. [2021-10-28 10:04:58,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-28 10:04:58,045 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:04:58,045 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 10:04:58,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 10:04:58,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-28 10:04:58,272 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr2ASSERT_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:04:58,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:04:58,272 INFO L85 PathProgramCache]: Analyzing trace with hash 688463746, now seen corresponding path program 1 times [2021-10-28 10:04:58,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:04:58,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639606349] [2021-10-28 10:04:58,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:04:58,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:04:58,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:04:58,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:04:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:04:58,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:04:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:04:58,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:04:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:04:58,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:04:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:04:58,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 10:04:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:04:58,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-10-28 10:04:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:04:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-28 10:04:58,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:04:58,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639606349] [2021-10-28 10:04:58,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639606349] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 10:04:58,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 10:04:58,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 10:04:58,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761234054] [2021-10-28 10:04:58,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 10:04:58,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:04:58,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 10:04:58,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 10:04:58,485 INFO L87 Difference]: Start difference. First operand 200 states and 229 transitions. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 6 states have internal predecessors, (60), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-10-28 10:04:58,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:04:58,895 INFO L93 Difference]: Finished difference Result 209 states and 231 transitions. [2021-10-28 10:04:58,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 10:04:58,896 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 6 states have internal predecessors, (60), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 82 [2021-10-28 10:04:58,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:04:58,897 INFO L225 Difference]: With dead ends: 209 [2021-10-28 10:04:58,897 INFO L226 Difference]: Without dead ends: 209 [2021-10-28 10:04:58,897 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-10-28 10:04:58,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-10-28 10:04:58,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 202. [2021-10-28 10:04:58,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 166 states have (on average 1.2530120481927711) internal successors, (208), 184 states have internal predecessors, (208), 10 states have call successors, (10), 9 states have call predecessors, (10), 12 states have return successors, (13), 8 states have call predecessors, (13), 9 states have call successors, (13) [2021-10-28 10:04:58,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 231 transitions. [2021-10-28 10:04:58,904 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 231 transitions. Word has length 82 [2021-10-28 10:04:58,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:04:58,904 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 231 transitions. [2021-10-28 10:04:58,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 6 states have internal predecessors, (60), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-10-28 10:04:58,905 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 231 transitions. [2021-10-28 10:04:58,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-28 10:04:58,905 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:04:58,906 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 10:04:58,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-10-28 10:04:58,906 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr3ENSURES_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:04:58,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:04:58,907 INFO L85 PathProgramCache]: Analyzing trace with hash 688463811, now seen corresponding path program 1 times [2021-10-28 10:04:58,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:04:58,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925741425] [2021-10-28 10:04:58,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:04:58,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:04:58,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:04:59,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:04:59,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:04:59,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:04:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:04:59,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:04:59,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:04:59,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:04:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:04:59,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 10:04:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:05:00,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-10-28 10:05:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:05:01,315 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 10:05:01,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:05:01,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925741425] [2021-10-28 10:05:01,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925741425] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:05:01,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578255742] [2021-10-28 10:05:01,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:05:01,315 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:05:01,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 10:05:01,320 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 10:05:01,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 10:05:02,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:05:02,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 118 conjunts are in the unsatisfiable core [2021-10-28 10:05:02,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 10:05:03,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 10:05:03,639 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 10:05:03,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 52 [2021-10-28 10:05:24,207 INFO L354 Elim1Store]: treesize reduction 192, result has 13.5 percent of original size [2021-10-28 10:05:24,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 341 treesize of output 144 [2021-10-28 10:05:24,213 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 220 treesize of output 164 [2021-10-28 10:05:28,801 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-28 10:05:28,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 67 [2021-10-28 10:05:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 15 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 10:05:29,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578255742] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:05:29,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 10:05:29,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 38] total 68 [2021-10-28 10:05:29,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581109849] [2021-10-28 10:05:29,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-10-28 10:05:29,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:05:29,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-10-28 10:05:29,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=4417, Unknown=19, NotChecked=0, Total=4692 [2021-10-28 10:05:29,256 INFO L87 Difference]: Start difference. First operand 202 states and 231 transitions. Second operand has 69 states, 66 states have (on average 1.8636363636363635) internal successors, (123), 59 states have internal predecessors, (123), 10 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-10-28 10:06:22,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:06:22,899 INFO L93 Difference]: Finished difference Result 214 states and 242 transitions. [2021-10-28 10:06:22,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-28 10:06:22,900 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 66 states have (on average 1.8636363636363635) internal successors, (123), 59 states have internal predecessors, (123), 10 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 82 [2021-10-28 10:06:22,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:06:22,902 INFO L225 Difference]: With dead ends: 214 [2021-10-28 10:06:22,902 INFO L226 Difference]: Without dead ends: 211 [2021-10-28 10:06:22,903 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2187 ImplicationChecksByTransitivity, 46.1s TimeCoverageRelationStatistics Valid=537, Invalid=7984, Unknown=35, NotChecked=0, Total=8556 [2021-10-28 10:06:22,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-10-28 10:06:22,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 204. [2021-10-28 10:06:22,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 168 states have (on average 1.25) internal successors, (210), 185 states have internal predecessors, (210), 10 states have call successors, (10), 9 states have call predecessors, (10), 12 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2021-10-28 10:06:22,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 233 transitions. [2021-10-28 10:06:22,910 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 233 transitions. Word has length 82 [2021-10-28 10:06:22,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:06:22,911 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 233 transitions. [2021-10-28 10:06:22,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 66 states have (on average 1.8636363636363635) internal successors, (123), 59 states have internal predecessors, (123), 10 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-10-28 10:06:22,911 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 233 transitions. [2021-10-28 10:06:22,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-10-28 10:06:22,912 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 10:06:22,912 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 10:06:22,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 10:06:23,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-28 10:06:23,126 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting sll_circular_remove_firstErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-28 10:06:23,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 10:06:23,126 INFO L85 PathProgramCache]: Analyzing trace with hash -127063222, now seen corresponding path program 1 times [2021-10-28 10:06:23,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 10:06:23,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947162486] [2021-10-28 10:06:23,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:06:23,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 10:06:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:06:23,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 10:06:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:06:23,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 10:06:23,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:06:23,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-28 10:06:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:06:23,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 10:06:23,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:06:23,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-28 10:06:23,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:06:23,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-10-28 10:06:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:06:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-28 10:06:23,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 10:06:23,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947162486] [2021-10-28 10:06:23,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947162486] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 10:06:23,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924339230] [2021-10-28 10:06:23,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 10:06:23,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 10:06:23,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 10:06:23,280 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 10:06:23,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 10:06:24,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 10:06:24,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 10:06:24,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 10:06:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-28 10:06:24,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924339230] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 10:06:24,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 10:06:24,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2021-10-28 10:06:24,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047559498] [2021-10-28 10:06:24,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 10:06:24,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 10:06:24,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 10:06:24,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-28 10:06:24,875 INFO L87 Difference]: Start difference. First operand 204 states and 233 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 10:06:24,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 10:06:24,893 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-10-28 10:06:24,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 10:06:24,893 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 83 [2021-10-28 10:06:24,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 10:06:24,894 INFO L225 Difference]: With dead ends: 72 [2021-10-28 10:06:24,894 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 10:06:24,894 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-28 10:06:24,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 10:06:24,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 10:06:24,895 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 10:06:24,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 10:06:24,895 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 83 [2021-10-28 10:06:24,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 10:06:24,896 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 10:06:24,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-28 10:06:24,896 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 10:06:24,896 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 10:06:24,898 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr0REQUIRES_VIOLATION [2021-10-28 10:06:24,899 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr1REQUIRES_VIOLATION [2021-10-28 10:06:24,899 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr2REQUIRES_VIOLATION [2021-10-28 10:06:24,899 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr3REQUIRES_VIOLATION [2021-10-28 10:06:24,899 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-28 10:06:24,899 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-28 10:06:24,899 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 10:06:24,899 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 10:06:24,899 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr0REQUIRES_VIOLATION [2021-10-28 10:06:24,899 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr1REQUIRES_VIOLATION [2021-10-28 10:06:24,899 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr2REQUIRES_VIOLATION [2021-10-28 10:06:24,899 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr3REQUIRES_VIOLATION [2021-10-28 10:06:24,900 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr0REQUIRES_VIOLATION [2021-10-28 10:06:24,900 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr1REQUIRES_VIOLATION [2021-10-28 10:06:24,900 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr2REQUIRES_VIOLATION [2021-10-28 10:06:24,900 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr3REQUIRES_VIOLATION [2021-10-28 10:06:24,900 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr4REQUIRES_VIOLATION [2021-10-28 10:06:24,900 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr5REQUIRES_VIOLATION [2021-10-28 10:06:24,900 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr6REQUIRES_VIOLATION [2021-10-28 10:06:24,900 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr7REQUIRES_VIOLATION [2021-10-28 10:06:24,900 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 10:06:24,900 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 10:06:24,900 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 10:06:24,900 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr11REQUIRES_VIOLATION [2021-10-28 10:06:24,900 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr12REQUIRES_VIOLATION [2021-10-28 10:06:24,901 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr13REQUIRES_VIOLATION [2021-10-28 10:06:24,901 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr14REQUIRES_VIOLATION [2021-10-28 10:06:24,901 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr15REQUIRES_VIOLATION [2021-10-28 10:06:24,901 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr16REQUIRES_VIOLATION [2021-10-28 10:06:24,901 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr17REQUIRES_VIOLATION [2021-10-28 10:06:24,901 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr18REQUIRES_VIOLATION [2021-10-28 10:06:24,901 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr19REQUIRES_VIOLATION [2021-10-28 10:06:24,901 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr20REQUIRES_VIOLATION [2021-10-28 10:06:24,901 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr21REQUIRES_VIOLATION [2021-10-28 10:06:24,901 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr22REQUIRES_VIOLATION [2021-10-28 10:06:24,901 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr23REQUIRES_VIOLATION [2021-10-28 10:06:24,901 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr24REQUIRES_VIOLATION [2021-10-28 10:06:24,901 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 10:06:24,902 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr26ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 10:06:24,902 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr27ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 10:06:24,902 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr28REQUIRES_VIOLATION [2021-10-28 10:06:24,902 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr29REQUIRES_VIOLATION [2021-10-28 10:06:24,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 10:06:25,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-28 10:06:25,105 INFO L731 BasicCegarLoop]: Path program 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 10:06:25,107 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 10:06:25,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 10:06:25 BoogieIcfgContainer [2021-10-28 10:06:25,109 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 10:06:25,110 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 10:06:25,110 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 10:06:25,110 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 10:06:25,111 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:59:27" (3/4) ... [2021-10-28 10:06:25,114 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 10:06:25,122 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-10-28 10:06:25,122 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-28 10:06:25,122 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2021-10-28 10:06:25,122 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_circular_remove_first [2021-10-28 10:06:25,122 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-28 10:06:25,123 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-28 10:06:25,123 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_circular_create [2021-10-28 10:06:25,123 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-28 10:06:25,123 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure node_create [2021-10-28 10:06:25,131 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-10-28 10:06:25,131 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-28 10:06:25,132 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-28 10:06:25,132 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 10:06:25,203 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 10:06:25,203 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 10:06:25,204 INFO L168 Benchmark]: Toolchain (without parser) took 418929.65 ms. Allocated memory was 86.0 MB in the beginning and 423.6 MB in the end (delta: 337.6 MB). Free memory was 48.5 MB in the beginning and 85.5 MB in the end (delta: -37.0 MB). Peak memory consumption was 299.7 MB. Max. memory is 16.1 GB. [2021-10-28 10:06:25,204 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 86.0 MB. Free memory was 66.1 MB in the beginning and 66.0 MB in the end (delta: 39.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 10:06:25,207 INFO L168 Benchmark]: CACSL2BoogieTranslator took 554.51 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 48.3 MB in the beginning and 73.6 MB in the end (delta: -25.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 10:06:25,208 INFO L168 Benchmark]: Boogie Preprocessor took 126.44 ms. Allocated memory is still 104.9 MB. Free memory was 73.6 MB in the beginning and 70.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 10:06:25,208 INFO L168 Benchmark]: RCFGBuilder took 950.66 ms. Allocated memory is still 104.9 MB. Free memory was 70.9 MB in the beginning and 46.0 MB in the end (delta: 24.8 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-28 10:06:25,209 INFO L168 Benchmark]: TraceAbstraction took 417186.62 ms. Allocated memory was 104.9 MB in the beginning and 423.6 MB in the end (delta: 318.8 MB). Free memory was 45.4 MB in the beginning and 89.7 MB in the end (delta: -44.3 MB). Peak memory consumption was 276.8 MB. Max. memory is 16.1 GB. [2021-10-28 10:06:25,209 INFO L168 Benchmark]: Witness Printer took 93.30 ms. Allocated memory is still 423.6 MB. Free memory was 89.7 MB in the beginning and 85.5 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 10:06:25,217 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 86.0 MB. Free memory was 66.1 MB in the beginning and 66.0 MB in the end (delta: 39.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 554.51 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 48.3 MB in the beginning and 73.6 MB in the end (delta: -25.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 126.44 ms. Allocated memory is still 104.9 MB. Free memory was 73.6 MB in the beginning and 70.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 950.66 ms. Allocated memory is still 104.9 MB. Free memory was 70.9 MB in the beginning and 46.0 MB in the end (delta: 24.8 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 417186.62 ms. Allocated memory was 104.9 MB in the beginning and 423.6 MB in the end (delta: 318.8 MB). Free memory was 45.4 MB in the beginning and 89.7 MB in the end (delta: -44.3 MB). Peak memory consumption was 276.8 MB. Max. memory is 16.1 GB. * Witness Printer took 93.30 ms. Allocated memory is still 423.6 MB. Free memory was 89.7 MB in the beginning and 85.5 MB in the end (delta: 4.2 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: 579]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 579]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 580]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 580]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 619]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 619]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 623]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 610]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 588]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 588]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 592]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 592]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 596]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 596]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 596]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 596]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 597]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 597]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 598]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 598]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 598]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 598]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 598]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 599]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 599]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 601]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 601]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 602]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 602]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 602]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 602]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 603]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 603]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 605]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 605]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 606]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 606]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 606]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 606]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 606]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 607]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 607]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 118 locations, 42 error locations. Started 1 CEGAR loops. OverallTime: 417.1s, OverallIterations: 40, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 292.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1950 SDtfs, 9683 SDslu, 13137 SDs, 0 SdLazy, 51851 SolverSat, 1637 SolverUnsat, 217 SolverUnknown, 0 SolverNotchecked, 200.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2805 GetRequests, 1173 SyntacticMatches, 32 SemanticMatches, 1600 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21429 ImplicationChecksByTransitivity, 142.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=251occurred in iteration=36, InterpolantAutomatonStates: 874, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 40 MinimizatonAttempts, 634 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 102.9s InterpolantComputationTime, 3307 NumberOfCodeBlocks, 3307 NumberOfCodeBlocksAsserted, 65 NumberOfCheckSat, 3245 ConstructedInterpolants, 229 QuantifiedInterpolants, 54587 SizeOfPredicates, 405 NumberOfNonLiveVariables, 7894 ConjunctsInSsa, 1465 ConjunctsInUnsatCore, 62 InterpolantComputations, 20 PerfectInterpolantSequences, 444/818 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 42 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-28 10:06:25,444 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-28 10:06:25,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc3e5a89-480f-482d-b25c-e5a42d959745/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...