./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 e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_remove_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be --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-e943c26 [2021-10-21 19:46:52,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:46:52,520 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:46:52,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:46:52,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:46:52,559 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:46:52,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:46:52,564 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:46:52,566 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:46:52,568 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:46:52,569 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:46:52,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:46:52,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:46:52,573 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:46:52,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:46:52,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:46:52,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:46:52,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:46:52,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:46:52,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:46:52,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:46:52,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:46:52,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:46:52,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:46:52,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:46:52,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:46:52,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:46:52,612 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:46:52,614 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:46:52,616 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:46:52,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:46:52,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:46:52,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:46:52,623 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:46:52,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:46:52,626 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:46:52,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:46:52,628 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:46:52,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:46:52,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:46:52,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:46:52,632 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 19:46:52,679 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:46:52,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:46:52,681 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:46:52,681 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:46:52,690 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:46:52,691 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:46:52,691 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:46:52,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:46:52,692 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:46:52,692 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:46:52,693 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:46:52,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:46:52,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:46:52,695 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:46:52,695 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:46:52,695 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 19:46:52,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:46:52,696 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:46:52,696 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:46:52,696 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:46:52,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:46:52,697 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:46:52,697 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:46:52,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:46:52,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:46:52,698 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:46:52,698 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:46:52,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:46:52,699 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:46:52,701 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_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd9bd7b6c1446abd728b90c98a54cb367face4c5994cfeca4979c2dbc50ad4d3 [2021-10-21 19:46:53,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:46:53,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:46:53,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:46:53,048 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:46:53,050 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:46:53,051 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/list-simple/sll2c_remove_all.i [2021-10-21 19:46:53,143 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/data/f09f6bbd4/c042b8e140f144c09b3f3ceb1a0d9cbb/FLAGe29d5c857 [2021-10-21 19:46:53,823 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:46:53,824 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/sv-benchmarks/c/list-simple/sll2c_remove_all.i [2021-10-21 19:46:53,836 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/data/f09f6bbd4/c042b8e140f144c09b3f3ceb1a0d9cbb/FLAGe29d5c857 [2021-10-21 19:46:54,073 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/data/f09f6bbd4/c042b8e140f144c09b3f3ceb1a0d9cbb [2021-10-21 19:46:54,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:46:54,081 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:46:54,086 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:46:54,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:46:54,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:46:54,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:46:54" (1/1) ... [2021-10-21 19:46:54,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@367e7252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:46:54, skipping insertion in model container [2021-10-21 19:46:54,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:46:54" (1/1) ... [2021-10-21 19:46:54,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:46:54,143 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:46:54,556 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_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/sv-benchmarks/c/list-simple/sll2c_remove_all.i[24082,24095] [2021-10-21 19:46:54,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:46:54,575 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:46:54,644 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_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/sv-benchmarks/c/list-simple/sll2c_remove_all.i[24082,24095] [2021-10-21 19:46:54,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:46:54,683 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:46:54,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:46:54 WrapperNode [2021-10-21 19:46:54,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:46:54,687 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:46:54,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:46:54,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:46:54,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:46:54" (1/1) ... [2021-10-21 19:46:54,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:46:54" (1/1) ... [2021-10-21 19:46:54,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:46:54" (1/1) ... [2021-10-21 19:46:54,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:46:54" (1/1) ... [2021-10-21 19:46:54,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:46:54" (1/1) ... [2021-10-21 19:46:54,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:46:54" (1/1) ... [2021-10-21 19:46:54,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:46:54" (1/1) ... [2021-10-21 19:46:54,813 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:46:54,827 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:46:54,827 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:46:54,827 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:46:54,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:46:54" (1/1) ... [2021-10-21 19:46:54,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:46:54,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:46:54,872 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:46:54,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:46:54,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:46:54,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:46:54,938 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-21 19:46:54,938 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 19:46:54,938 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 19:46:54,939 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-21 19:46:54,940 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-10-21 19:46:54,940 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_create [2021-10-21 19:46:54,940 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_remove_first [2021-10-21 19:46:54,941 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:46:54,942 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:46:54,942 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-21 19:46:54,942 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-21 19:46:54,942 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-21 19:46:54,942 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-21 19:46:54,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:46:54,943 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 19:46:54,943 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 19:46:54,943 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 19:46:54,944 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 19:46:54,944 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 19:46:54,944 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 19:46:54,944 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 19:46:54,944 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 19:46:54,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 19:46:54,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 19:46:54,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 19:46:54,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 19:46:54,945 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 19:46:54,946 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 19:46:54,946 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 19:46:54,946 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 19:46:54,946 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 19:46:54,946 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 19:46:54,947 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 19:46:54,947 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 19:46:54,947 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 19:46:54,947 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 19:46:54,948 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 19:46:54,948 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 19:46:54,948 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 19:46:54,948 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 19:46:54,948 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 19:46:54,949 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 19:46:54,949 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 19:46:54,949 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 19:46:54,950 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 19:46:54,950 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 19:46:54,950 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 19:46:54,951 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 19:46:54,951 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 19:46:54,952 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 19:46:54,952 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 19:46:54,952 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 19:46:54,953 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 19:46:54,953 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 19:46:54,953 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 19:46:54,953 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 19:46:54,953 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 19:46:54,954 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 19:46:54,954 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 19:46:54,954 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 19:46:54,954 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 19:46:54,954 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 19:46:54,955 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 19:46:54,955 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 19:46:54,957 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 19:46:54,957 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 19:46:54,958 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 19:46:54,958 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 19:46:54,959 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 19:46:54,959 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 19:46:54,959 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-21 19:46:54,959 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 19:46:54,959 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 19:46:54,960 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 19:46:54,960 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 19:46:54,960 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 19:46:54,960 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 19:46:54,961 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 19:46:54,961 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 19:46:54,962 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 19:46:54,962 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 19:46:54,962 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 19:46:54,962 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 19:46:54,962 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 19:46:54,963 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 19:46:54,963 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 19:46:54,963 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 19:46:54,963 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 19:46:54,963 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 19:46:54,964 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 19:46:54,964 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 19:46:54,964 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 19:46:54,964 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 19:46:54,965 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 19:46:54,965 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 19:46:54,965 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 19:46:54,965 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 19:46:54,965 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 19:46:54,966 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 19:46:54,966 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 19:46:54,966 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 19:46:54,966 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 19:46:54,966 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 19:46:54,967 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 19:46:54,967 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 19:46:54,967 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 19:46:54,968 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 19:46:54,969 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 19:46:54,969 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 19:46:54,969 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 19:46:54,969 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 19:46:54,970 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 19:46:54,970 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 19:46:54,970 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 19:46:54,970 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 19:46:54,970 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 19:46:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 19:46:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 19:46:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-21 19:46:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-10-21 19:46:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:46:54,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 19:46:54,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:46:54,972 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_create [2021-10-21 19:46:54,973 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_remove_first [2021-10-21 19:46:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 19:46:54,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:46:54,977 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:46:54,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-21 19:46:54,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:46:54,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:46:54,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:46:54,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:46:55,363 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-21 19:46:55,714 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:46:55,714 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-10-21 19:46:55,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:46:55 BoogieIcfgContainer [2021-10-21 19:46:55,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:46:55,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:46:55,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:46:55,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:46:55,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:46:54" (1/3) ... [2021-10-21 19:46:55,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26c67a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:46:55, skipping insertion in model container [2021-10-21 19:46:55,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:46:54" (2/3) ... [2021-10-21 19:46:55,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26c67a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:46:55, skipping insertion in model container [2021-10-21 19:46:55,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:46:55" (3/3) ... [2021-10-21 19:46:55,734 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all.i [2021-10-21 19:46:55,741 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:46:55,741 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2021-10-21 19:46:55,805 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:46:55,815 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 [2021-10-21 19:46:55,815 INFO L340 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2021-10-21 19:46:55,841 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) [2021-10-21 19:46:55,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:46:55,858 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:46:55,859 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:46:55,859 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-21 19:46:55,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:46:55,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1395759788, now seen corresponding path program 1 times [2021-10-21 19:46:55,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:46:55,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080265399] [2021-10-21 19:46:55,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:46:55,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:46:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:56,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:46:56,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:46:56,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:46:56,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080265399] [2021-10-21 19:46:56,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080265399] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:46:56,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:46:56,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:46:56,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412101898] [2021-10-21 19:46:56,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:46:56,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:46:56,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:46:56,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:46:56,209 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) [2021-10-21 19:46:56,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:46:56,689 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2021-10-21 19:46:56,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:46:56,691 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 [2021-10-21 19:46:56,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:46:56,699 INFO L225 Difference]: With dead ends: 106 [2021-10-21 19:46:56,699 INFO L226 Difference]: Without dead ends: 100 [2021-10-21 19:46:56,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:46:56,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-21 19:46:56,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-10-21 19:46:56,751 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) [2021-10-21 19:46:56,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2021-10-21 19:46:56,759 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 12 [2021-10-21 19:46:56,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:46:56,759 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2021-10-21 19:46:56,759 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) [2021-10-21 19:46:56,760 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2021-10-21 19:46:56,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:46:56,760 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:46:56,761 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:46:56,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:46:56,761 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-21 19:46:56,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:46:56,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1395759787, now seen corresponding path program 1 times [2021-10-21 19:46:56,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:46:56,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110853108] [2021-10-21 19:46:56,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:46:56,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:46:56,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:56,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:46:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:56,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:46:56,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:46:56,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110853108] [2021-10-21 19:46:56,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110853108] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:46:56,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:46:56,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:46:56,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894304316] [2021-10-21 19:46:56,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:46:56,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:46:56,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:46:56,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:46:56,886 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) [2021-10-21 19:46:57,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:46:57,075 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2021-10-21 19:46:57,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:46:57,076 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 [2021-10-21 19:46:57,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:46:57,078 INFO L225 Difference]: With dead ends: 98 [2021-10-21 19:46:57,078 INFO L226 Difference]: Without dead ends: 98 [2021-10-21 19:46:57,079 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:46:57,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-21 19:46:57,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-10-21 19:46:57,087 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) [2021-10-21 19:46:57,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2021-10-21 19:46:57,089 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 12 [2021-10-21 19:46:57,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:46:57,090 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2021-10-21 19:46:57,090 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) [2021-10-21 19:46:57,090 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2021-10-21 19:46:57,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:46:57,091 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:46:57,091 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:46:57,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:46:57,092 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)] === [2021-10-21 19:46:57,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:46:57,092 INFO L82 PathProgramCache]: Analyzing trace with hash -799936565, now seen corresponding path program 1 times [2021-10-21 19:46:57,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:46:57,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682414802] [2021-10-21 19:46:57,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:46:57,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:46:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:57,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:46:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:57,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-21 19:46:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:46:57,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:46:57,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682414802] [2021-10-21 19:46:57,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682414802] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:46:57,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:46:57,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 19:46:57,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347590278] [2021-10-21 19:46:57,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:46:57,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:46:57,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:46:57,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:46:57,270 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) [2021-10-21 19:46:57,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:46:57,673 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2021-10-21 19:46:57,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:46:57,674 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 [2021-10-21 19:46:57,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:46:57,680 INFO L225 Difference]: With dead ends: 105 [2021-10-21 19:46:57,680 INFO L226 Difference]: Without dead ends: 105 [2021-10-21 19:46:57,681 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:46:57,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-21 19:46:57,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2021-10-21 19:46:57,701 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) [2021-10-21 19:46:57,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2021-10-21 19:46:57,703 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 19 [2021-10-21 19:46:57,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:46:57,703 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2021-10-21 19:46:57,704 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) [2021-10-21 19:46:57,704 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2021-10-21 19:46:57,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:46:57,705 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:46:57,705 INFO L512 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] [2021-10-21 19:46:57,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:46:57,706 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)] === [2021-10-21 19:46:57,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:46:57,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1837051173, now seen corresponding path program 1 times [2021-10-21 19:46:57,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:46:57,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472998668] [2021-10-21 19:46:57,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:46:57,707 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:46:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:57,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:46:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:57,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-21 19:46:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:57,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:46:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:46:57,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:46:57,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472998668] [2021-10-21 19:46:57,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472998668] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:46:57,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:46:57,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 19:46:57,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146327541] [2021-10-21 19:46:57,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:46:57,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:46:57,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:46:57,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:46:57,937 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) [2021-10-21 19:46:58,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:46:58,371 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2021-10-21 19:46:58,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:46:58,372 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 [2021-10-21 19:46:58,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:46:58,375 INFO L225 Difference]: With dead ends: 99 [2021-10-21 19:46:58,375 INFO L226 Difference]: Without dead ends: 99 [2021-10-21 19:46:58,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:46:58,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-21 19:46:58,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-10-21 19:46:58,382 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) [2021-10-21 19:46:58,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2021-10-21 19:46:58,384 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 28 [2021-10-21 19:46:58,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:46:58,384 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2021-10-21 19:46:58,384 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) [2021-10-21 19:46:58,385 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2021-10-21 19:46:58,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:46:58,386 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:46:58,386 INFO L512 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] [2021-10-21 19:46:58,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:46:58,386 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)] === [2021-10-21 19:46:58,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:46:58,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1837051174, now seen corresponding path program 1 times [2021-10-21 19:46:58,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:46:58,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361434371] [2021-10-21 19:46:58,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:46:58,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:46:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:58,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:46:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:58,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-21 19:46:58,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:58,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:46:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:58,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:46:58,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:46:58,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361434371] [2021-10-21 19:46:58,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361434371] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:46:58,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:46:58,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 19:46:58,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001167210] [2021-10-21 19:46:58,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:46:58,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:46:58,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:46:58,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:46:58,648 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) [2021-10-21 19:46:59,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:46:59,064 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-10-21 19:46:59,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:46:59,065 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 [2021-10-21 19:46:59,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:46:59,066 INFO L225 Difference]: With dead ends: 98 [2021-10-21 19:46:59,066 INFO L226 Difference]: Without dead ends: 98 [2021-10-21 19:46:59,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:46:59,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-21 19:46:59,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-10-21 19:46:59,072 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) [2021-10-21 19:46:59,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2021-10-21 19:46:59,074 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 28 [2021-10-21 19:46:59,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:46:59,074 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2021-10-21 19:46:59,074 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) [2021-10-21 19:46:59,080 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2021-10-21 19:46:59,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-21 19:46:59,081 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:46:59,082 INFO L512 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] [2021-10-21 19:46:59,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 19:46:59,082 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)] === [2021-10-21 19:46:59,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:46:59,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1118258617, now seen corresponding path program 1 times [2021-10-21 19:46:59,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:46:59,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281233518] [2021-10-21 19:46:59,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:46:59,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:46:59,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:59,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:46:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:59,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-21 19:46:59,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:59,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:46:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:59,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:46:59,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:46:59,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281233518] [2021-10-21 19:46:59,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281233518] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:46:59,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305388495] [2021-10-21 19:46:59,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:46:59,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:46:59,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:46:59,348 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:46:59,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:46:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:46:59,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 19:46:59,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:46:59,670 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 [2021-10-21 19:46:59,852 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:46:59,853 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 [2021-10-21 19:46:59,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:46:59,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305388495] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:46:59,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:46:59,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 14 [2021-10-21 19:46:59,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557331338] [2021-10-21 19:46:59,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:46:59,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:46:59,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:46:59,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:46:59,944 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) [2021-10-21 19:47:00,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:47:00,227 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-10-21 19:47:00,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:47:00,228 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 [2021-10-21 19:47:00,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:47:00,229 INFO L225 Difference]: With dead ends: 98 [2021-10-21 19:47:00,229 INFO L226 Difference]: Without dead ends: 98 [2021-10-21 19:47:00,230 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 174.3ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:47:00,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-21 19:47:00,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2021-10-21 19:47:00,235 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) [2021-10-21 19:47:00,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2021-10-21 19:47:00,237 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 31 [2021-10-21 19:47:00,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:47:00,238 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2021-10-21 19:47:00,238 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) [2021-10-21 19:47:00,238 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2021-10-21 19:47:00,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-21 19:47:00,239 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:47:00,239 INFO L512 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] [2021-10-21 19:47:00,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:47:00,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-21 19:47:00,463 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)] === [2021-10-21 19:47:00,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:47:00,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1118258618, now seen corresponding path program 1 times [2021-10-21 19:47:00,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:47:00,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071257200] [2021-10-21 19:47:00,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:47:00,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:47:00,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:47:00,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:47:00,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:47:00,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-21 19:47:00,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:47:00,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-21 19:47:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:47:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:47:00,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:47:00,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071257200] [2021-10-21 19:47:00,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071257200] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:47:00,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066999837] [2021-10-21 19:47:00,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:47:00,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:47:00,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:47:00,767 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:47:00,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:47:00,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:47:00,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-21 19:47:00,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:47:00,992 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 [2021-10-21 19:47:01,269 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-10-21 19:47:01,270 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 [2021-10-21 19:47:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:47:01,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066999837] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:47:01,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:47:01,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-10-21 19:47:01,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410210229] [2021-10-21 19:47:01,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:47:01,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:47:01,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:47:01,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:47:01,343 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) [2021-10-21 19:47:02,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:47:02,007 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-10-21 19:47:02,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:47:02,008 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 [2021-10-21 19:47:02,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:47:02,010 INFO L225 Difference]: With dead ends: 96 [2021-10-21 19:47:02,010 INFO L226 Difference]: Without dead ends: 96 [2021-10-21 19:47:02,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 271.6ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:47:02,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-21 19:47:02,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-10-21 19:47:02,019 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) [2021-10-21 19:47:02,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2021-10-21 19:47:02,021 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 31 [2021-10-21 19:47:02,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:47:02,021 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2021-10-21 19:47:02,022 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) [2021-10-21 19:47:02,022 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2021-10-21 19:47:02,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 19:47:02,023 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:47:02,023 INFO L512 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] [2021-10-21 19:47:02,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:47:02,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:47:02,238 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-21 19:47:02,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:47:02,239 INFO L82 PathProgramCache]: Analyzing trace with hash 376686718, now seen corresponding path program 1 times [2021-10-21 19:47:02,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:47:02,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637600277] [2021-10-21 19:47:02,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:47:02,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:47:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:47:02,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:47:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:47:02,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:47:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:47:02,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:47:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:47:02,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:47:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:47:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-21 19:47:02,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:47:02,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637600277] [2021-10-21 19:47:02,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637600277] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:47:02,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:47:02,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:47:02,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306441597] [2021-10-21 19:47:02,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:47:02,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:47:02,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:47:02,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:47:02,407 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) [2021-10-21 19:47:02,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:47:02,614 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-10-21 19:47:02,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:47:02,615 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 [2021-10-21 19:47:02,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:47:02,616 INFO L225 Difference]: With dead ends: 98 [2021-10-21 19:47:02,617 INFO L226 Difference]: Without dead ends: 98 [2021-10-21 19:47:02,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:47:02,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-21 19:47:02,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2021-10-21 19:47:02,630 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) [2021-10-21 19:47:02,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2021-10-21 19:47:02,635 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 37 [2021-10-21 19:47:02,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:47:02,636 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2021-10-21 19:47:02,636 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) [2021-10-21 19:47:02,636 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2021-10-21 19:47:02,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-21 19:47:02,637 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:47:02,638 INFO L512 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] [2021-10-21 19:47:02,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-21 19:47:02,644 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)] === [2021-10-21 19:47:02,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:47:02,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1218858003, now seen corresponding path program 1 times [2021-10-21 19:47:02,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:47:02,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599197287] [2021-10-21 19:47:02,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:47:02,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:47:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:47:02,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:47:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:47:02,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:47:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:47:02,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:47:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:47:03,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:47:03,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:47:03,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:47:03,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:47:03,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599197287] [2021-10-21 19:47:03,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599197287] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:47:03,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067487235] [2021-10-21 19:47:03,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:47:03,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:47:03,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:47:03,331 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:47:03,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:47:03,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:47:03,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-21 19:47:03,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:47:03,590 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 [2021-10-21 19:47:03,632 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 [2021-10-21 19:47:04,247 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-21 19:47:04,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 24 [2021-10-21 19:47:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:47:04,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067487235] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:47:04,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:47:04,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-10-21 19:47:04,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74946534] [2021-10-21 19:47:04,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-21 19:47:04,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:47:04,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-21 19:47:04,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:47:04,433 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) [2021-10-21 19:48:30,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:48:30,142 INFO L93 Difference]: Finished difference Result 147 states and 157 transitions. [2021-10-21 19:48:30,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 19:48:30,144 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 [2021-10-21 19:48:30,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:48:30,145 INFO L225 Difference]: With dead ends: 147 [2021-10-21 19:48:30,146 INFO L226 Difference]: Without dead ends: 147 [2021-10-21 19:48:30,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 4873.1ms TimeCoverageRelationStatistics Valid=190, Invalid=998, Unknown=2, NotChecked=0, Total=1190 [2021-10-21 19:48:30,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-21 19:48:30,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 105. [2021-10-21 19:48:30,153 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) [2021-10-21 19:48:30,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 113 transitions. [2021-10-21 19:48:30,155 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 113 transitions. Word has length 39 [2021-10-21 19:48:30,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:48:30,156 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 113 transitions. [2021-10-21 19:48:30,156 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) [2021-10-21 19:48:30,156 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 113 transitions. [2021-10-21 19:48:30,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-21 19:48:30,158 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:48:30,158 INFO L512 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] [2021-10-21 19:48:30,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:48:30,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:48:30,375 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)] === [2021-10-21 19:48:30,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:48:30,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1218858004, now seen corresponding path program 1 times [2021-10-21 19:48:30,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:48:30,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203041215] [2021-10-21 19:48:30,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:48:30,376 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:48:30,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:30,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:48:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:30,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:48:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:30,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:48:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:30,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:48:30,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:30,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:48:30,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:48:30,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203041215] [2021-10-21 19:48:30,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203041215] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:48:30,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443122369] [2021-10-21 19:48:30,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:48:30,939 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:48:30,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:48:30,943 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:48:30,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:48:31,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:31,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 19:48:31,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:48:31,186 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 [2021-10-21 19:48:31,226 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 [2021-10-21 19:48:31,726 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-21 19:48:31,727 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 [2021-10-21 19:48:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:48:31,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443122369] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:48:31,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:48:31,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-10-21 19:48:31,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176544121] [2021-10-21 19:48:31,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:48:31,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:48:31,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:48:31,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:48:31,910 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) [2021-10-21 19:48:33,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:48:33,177 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2021-10-21 19:48:33,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:48:33,177 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 [2021-10-21 19:48:33,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:48:33,179 INFO L225 Difference]: With dead ends: 158 [2021-10-21 19:48:33,179 INFO L226 Difference]: Without dead ends: 158 [2021-10-21 19:48:33,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 619.1ms TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2021-10-21 19:48:33,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-21 19:48:33,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 135. [2021-10-21 19:48:33,185 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) [2021-10-21 19:48:33,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 163 transitions. [2021-10-21 19:48:33,187 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 163 transitions. Word has length 39 [2021-10-21 19:48:33,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:48:33,187 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 163 transitions. [2021-10-21 19:48:33,188 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) [2021-10-21 19:48:33,188 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 163 transitions. [2021-10-21 19:48:33,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-21 19:48:33,189 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:48:33,189 INFO L512 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] [2021-10-21 19:48:33,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:48:33,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-21 19:48:33,390 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)] === [2021-10-21 19:48:33,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:48:33,390 INFO L82 PathProgramCache]: Analyzing trace with hash -870107508, now seen corresponding path program 1 times [2021-10-21 19:48:33,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:48:33,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305525747] [2021-10-21 19:48:33,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:48:33,391 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:48:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:33,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:48:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:33,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:48:33,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:33,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:48:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:33,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:48:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:48:33,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:48:33,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305525747] [2021-10-21 19:48:33,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305525747] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:48:33,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:48:33,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-21 19:48:33,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386049322] [2021-10-21 19:48:33,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:48:33,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:48:33,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:48:33,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:48:33,594 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) [2021-10-21 19:48:34,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:48:34,313 INFO L93 Difference]: Finished difference Result 186 states and 229 transitions. [2021-10-21 19:48:34,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:48:34,314 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 [2021-10-21 19:48:34,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:48:34,315 INFO L225 Difference]: With dead ends: 186 [2021-10-21 19:48:34,315 INFO L226 Difference]: Without dead ends: 186 [2021-10-21 19:48:34,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 273.5ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:48:34,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-10-21 19:48:34,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 140. [2021-10-21 19:48:34,322 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) [2021-10-21 19:48:34,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 173 transitions. [2021-10-21 19:48:34,323 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 173 transitions. Word has length 40 [2021-10-21 19:48:34,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:48:34,324 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 173 transitions. [2021-10-21 19:48:34,324 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) [2021-10-21 19:48:34,324 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 173 transitions. [2021-10-21 19:48:34,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-21 19:48:34,325 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:48:34,326 INFO L512 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] [2021-10-21 19:48:34,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-21 19:48:34,326 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)] === [2021-10-21 19:48:34,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:48:34,327 INFO L82 PathProgramCache]: Analyzing trace with hash -870107507, now seen corresponding path program 1 times [2021-10-21 19:48:34,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:48:34,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394582946] [2021-10-21 19:48:34,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:48:34,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:48:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:34,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:48:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:34,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:48:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:34,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:48:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:34,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:48:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:34,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:48:34,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:48:34,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394582946] [2021-10-21 19:48:34,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394582946] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:48:34,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:48:34,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-21 19:48:34,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637429143] [2021-10-21 19:48:34,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:48:34,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:48:34,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:48:34,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:48:34,628 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) [2021-10-21 19:48:35,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:48:35,391 INFO L93 Difference]: Finished difference Result 189 states and 232 transitions. [2021-10-21 19:48:35,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:48:35,392 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 [2021-10-21 19:48:35,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:48:35,394 INFO L225 Difference]: With dead ends: 189 [2021-10-21 19:48:35,394 INFO L226 Difference]: Without dead ends: 189 [2021-10-21 19:48:35,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 370.0ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:48:35,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-10-21 19:48:35,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2021-10-21 19:48:35,401 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) [2021-10-21 19:48:35,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 171 transitions. [2021-10-21 19:48:35,402 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 171 transitions. Word has length 40 [2021-10-21 19:48:35,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:48:35,403 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 171 transitions. [2021-10-21 19:48:35,403 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) [2021-10-21 19:48:35,403 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 171 transitions. [2021-10-21 19:48:35,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-21 19:48:35,404 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:48:35,405 INFO L512 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] [2021-10-21 19:48:35,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-21 19:48:35,405 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)] === [2021-10-21 19:48:35,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:48:35,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1779866749, now seen corresponding path program 1 times [2021-10-21 19:48:35,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:48:35,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045042994] [2021-10-21 19:48:35,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:48:35,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:48:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:35,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:48:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:35,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:48:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:35,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:48:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:35,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:48:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:48:35,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:48:35,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045042994] [2021-10-21 19:48:35,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045042994] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:48:35,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:48:35,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-21 19:48:35,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909459143] [2021-10-21 19:48:35,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:48:35,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:48:35,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:48:35,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:48:35,638 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) [2021-10-21 19:48:36,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:48:36,337 INFO L93 Difference]: Finished difference Result 217 states and 271 transitions. [2021-10-21 19:48:36,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 19:48:36,340 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 [2021-10-21 19:48:36,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:48:36,341 INFO L225 Difference]: With dead ends: 217 [2021-10-21 19:48:36,342 INFO L226 Difference]: Without dead ends: 217 [2021-10-21 19:48:36,342 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 307.0ms TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:48:36,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-10-21 19:48:36,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 176. [2021-10-21 19:48:36,350 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) [2021-10-21 19:48:36,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 231 transitions. [2021-10-21 19:48:36,352 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 231 transitions. Word has length 45 [2021-10-21 19:48:36,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:48:36,353 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 231 transitions. [2021-10-21 19:48:36,353 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) [2021-10-21 19:48:36,353 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 231 transitions. [2021-10-21 19:48:36,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-21 19:48:36,354 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:48:36,354 INFO L512 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] [2021-10-21 19:48:36,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-21 19:48:36,355 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)] === [2021-10-21 19:48:36,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:48:36,355 INFO L82 PathProgramCache]: Analyzing trace with hash -658274541, now seen corresponding path program 1 times [2021-10-21 19:48:36,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:48:36,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422225299] [2021-10-21 19:48:36,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:48:36,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:48:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:36,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:48:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:36,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:48:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:36,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:48:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:36,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:48:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-21 19:48:36,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:48:36,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422225299] [2021-10-21 19:48:36,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422225299] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:48:36,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:48:36,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 19:48:36,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670345233] [2021-10-21 19:48:36,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:48:36,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:48:36,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:48:36,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:48:36,462 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) [2021-10-21 19:48:36,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:48:36,828 INFO L93 Difference]: Finished difference Result 177 states and 231 transitions. [2021-10-21 19:48:36,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:48:36,836 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 [2021-10-21 19:48:36,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:48:36,838 INFO L225 Difference]: With dead ends: 177 [2021-10-21 19:48:36,838 INFO L226 Difference]: Without dead ends: 177 [2021-10-21 19:48:36,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 202.9ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:48:36,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-10-21 19:48:36,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2021-10-21 19:48:36,846 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) [2021-10-21 19:48:36,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 231 transitions. [2021-10-21 19:48:36,848 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 231 transitions. Word has length 46 [2021-10-21 19:48:36,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:48:36,849 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 231 transitions. [2021-10-21 19:48:36,849 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) [2021-10-21 19:48:36,849 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 231 transitions. [2021-10-21 19:48:36,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-21 19:48:36,850 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:48:36,850 INFO L512 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] [2021-10-21 19:48:36,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-21 19:48:36,851 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)] === [2021-10-21 19:48:36,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:48:36,851 INFO L82 PathProgramCache]: Analyzing trace with hash -658274540, now seen corresponding path program 1 times [2021-10-21 19:48:36,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:48:36,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335596508] [2021-10-21 19:48:36,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:48:36,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:48:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:37,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:48:37,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:37,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:48:37,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:37,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:48:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:37,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:48:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:48:37,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:48:37,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335596508] [2021-10-21 19:48:37,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335596508] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:48:37,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:48:37,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-21 19:48:37,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324494515] [2021-10-21 19:48:37,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-21 19:48:37,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:48:37,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-21 19:48:37,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:48:37,206 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) [2021-10-21 19:48:38,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:48:38,295 INFO L93 Difference]: Finished difference Result 255 states and 325 transitions. [2021-10-21 19:48:38,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-21 19:48:38,296 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 [2021-10-21 19:48:38,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:48:38,298 INFO L225 Difference]: With dead ends: 255 [2021-10-21 19:48:38,298 INFO L226 Difference]: Without dead ends: 255 [2021-10-21 19:48:38,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 532.2ms TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-10-21 19:48:38,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-10-21 19:48:38,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 210. [2021-10-21 19:48:38,309 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) [2021-10-21 19:48:38,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 282 transitions. [2021-10-21 19:48:38,311 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 282 transitions. Word has length 46 [2021-10-21 19:48:38,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:48:38,312 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 282 transitions. [2021-10-21 19:48:38,312 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) [2021-10-21 19:48:38,312 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 282 transitions. [2021-10-21 19:48:38,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-21 19:48:38,313 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:48:38,313 INFO L512 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] [2021-10-21 19:48:38,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-21 19:48:38,314 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)] === [2021-10-21 19:48:38,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:48:38,314 INFO L82 PathProgramCache]: Analyzing trace with hash -658705490, now seen corresponding path program 1 times [2021-10-21 19:48:38,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:48:38,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861913273] [2021-10-21 19:48:38,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:48:38,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:48:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:38,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:48:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:38,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:48:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:38,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:48:38,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:38,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:48:38,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:38,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:48:38,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:48:38,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861913273] [2021-10-21 19:48:38,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861913273] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:48:38,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:48:38,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-21 19:48:38,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944831115] [2021-10-21 19:48:38,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:48:38,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:48:38,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:48:38,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:48:38,521 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) [2021-10-21 19:48:39,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:48:39,182 INFO L93 Difference]: Finished difference Result 245 states and 321 transitions. [2021-10-21 19:48:39,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 19:48:39,182 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 [2021-10-21 19:48:39,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:48:39,184 INFO L225 Difference]: With dead ends: 245 [2021-10-21 19:48:39,184 INFO L226 Difference]: Without dead ends: 245 [2021-10-21 19:48:39,185 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 292.4ms TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:48:39,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-10-21 19:48:39,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 216. [2021-10-21 19:48:39,193 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) [2021-10-21 19:48:39,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 289 transitions. [2021-10-21 19:48:39,195 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 289 transitions. Word has length 46 [2021-10-21 19:48:39,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:48:39,196 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 289 transitions. [2021-10-21 19:48:39,196 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) [2021-10-21 19:48:39,196 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 289 transitions. [2021-10-21 19:48:39,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-21 19:48:39,197 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:48:39,197 INFO L512 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] [2021-10-21 19:48:39,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-21 19:48:39,197 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)] === [2021-10-21 19:48:39,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:48:39,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1054966431, now seen corresponding path program 1 times [2021-10-21 19:48:39,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:48:39,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906226113] [2021-10-21 19:48:39,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:48:39,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:48:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:39,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:48:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:39,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:48:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:39,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:48:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:39,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:48:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:39,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-21 19:48:39,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:48:39,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906226113] [2021-10-21 19:48:39,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906226113] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:48:39,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:48:39,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:48:39,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374714134] [2021-10-21 19:48:39,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:48:39,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:48:39,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:48:39,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:48:39,301 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) [2021-10-21 19:48:39,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:48:39,578 INFO L93 Difference]: Finished difference Result 215 states and 285 transitions. [2021-10-21 19:48:39,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:48:39,579 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 [2021-10-21 19:48:39,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:48:39,580 INFO L225 Difference]: With dead ends: 215 [2021-10-21 19:48:39,580 INFO L226 Difference]: Without dead ends: 215 [2021-10-21 19:48:39,581 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 135.3ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:48:39,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-10-21 19:48:39,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2021-10-21 19:48:39,588 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) [2021-10-21 19:48:39,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 285 transitions. [2021-10-21 19:48:39,590 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 285 transitions. Word has length 47 [2021-10-21 19:48:39,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:48:39,591 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 285 transitions. [2021-10-21 19:48:39,591 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) [2021-10-21 19:48:39,591 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 285 transitions. [2021-10-21 19:48:39,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-21 19:48:39,592 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:48:39,592 INFO L512 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] [2021-10-21 19:48:39,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-21 19:48:39,593 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)] === [2021-10-21 19:48:39,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:48:39,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1655778863, now seen corresponding path program 1 times [2021-10-21 19:48:39,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:48:39,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657948232] [2021-10-21 19:48:39,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:48:39,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:48:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:39,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:48:39,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:39,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:48:39,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:39,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:48:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:39,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:48:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:39,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:48:39,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:48:39,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657948232] [2021-10-21 19:48:39,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657948232] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:48:39,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:48:39,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-10-21 19:48:39,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641257327] [2021-10-21 19:48:39,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-21 19:48:39,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:48:39,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 19:48:39,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:48:39,853 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) [2021-10-21 19:48:40,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:48:40,867 INFO L93 Difference]: Finished difference Result 242 states and 313 transitions. [2021-10-21 19:48:40,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-21 19:48:40,872 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 [2021-10-21 19:48:40,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:48:40,873 INFO L225 Difference]: With dead ends: 242 [2021-10-21 19:48:40,874 INFO L226 Difference]: Without dead ends: 242 [2021-10-21 19:48:40,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 475.2ms TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2021-10-21 19:48:40,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-10-21 19:48:40,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 219. [2021-10-21 19:48:40,887 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) [2021-10-21 19:48:40,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 290 transitions. [2021-10-21 19:48:40,891 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 290 transitions. Word has length 48 [2021-10-21 19:48:40,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:48:40,892 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 290 transitions. [2021-10-21 19:48:40,892 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) [2021-10-21 19:48:40,892 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 290 transitions. [2021-10-21 19:48:40,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-21 19:48:40,893 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:48:40,893 INFO L512 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] [2021-10-21 19:48:40,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-21 19:48:40,894 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)] === [2021-10-21 19:48:40,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:48:40,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1103929599, now seen corresponding path program 2 times [2021-10-21 19:48:40,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:48:40,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535361931] [2021-10-21 19:48:40,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:48:40,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:48:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:40,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:48:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:40,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:48:40,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:41,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:48:41,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:41,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:48:41,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:41,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-21 19:48:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-21 19:48:41,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:48:41,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535361931] [2021-10-21 19:48:41,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535361931] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:48:41,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631579005] [2021-10-21 19:48:41,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:48:41,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:48:41,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:48:41,047 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:48:41,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:48:41,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:48:41,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:48:41,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:48:41,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:48:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-21 19:48:41,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631579005] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:48:41,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:48:41,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-10-21 19:48:41,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757636533] [2021-10-21 19:48:41,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:48:41,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:48:41,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:48:41,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:48:41,524 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) [2021-10-21 19:48:41,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:48:41,852 INFO L93 Difference]: Finished difference Result 133 states and 155 transitions. [2021-10-21 19:48:41,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:48:41,853 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 [2021-10-21 19:48:41,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:48:41,854 INFO L225 Difference]: With dead ends: 133 [2021-10-21 19:48:41,854 INFO L226 Difference]: Without dead ends: 124 [2021-10-21 19:48:41,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:48:41,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-21 19:48:41,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-10-21 19:48:41,861 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) [2021-10-21 19:48:41,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 144 transitions. [2021-10-21 19:48:41,864 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 144 transitions. Word has length 51 [2021-10-21 19:48:41,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:48:41,866 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 144 transitions. [2021-10-21 19:48:41,866 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) [2021-10-21 19:48:41,867 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 144 transitions. [2021-10-21 19:48:41,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-21 19:48:41,867 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:48:41,867 INFO L512 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] [2021-10-21 19:48:41,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:48:42,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:48:42,080 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)] === [2021-10-21 19:48:42,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:48:42,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1386580709, now seen corresponding path program 1 times [2021-10-21 19:48:42,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:48:42,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133518304] [2021-10-21 19:48:42,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:48:42,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:48:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:42,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:48:42,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:42,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:48:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:42,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:48:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:42,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:48:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:42,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-21 19:48:42,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:48:42,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133518304] [2021-10-21 19:48:42,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133518304] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:48:42,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:48:42,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-21 19:48:42,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338140328] [2021-10-21 19:48:42,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:48:42,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:48:42,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:48:42,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:48:42,374 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) [2021-10-21 19:48:43,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:48:43,156 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2021-10-21 19:48:43,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:48:43,157 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 [2021-10-21 19:48:43,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:48:43,158 INFO L225 Difference]: With dead ends: 122 [2021-10-21 19:48:43,158 INFO L226 Difference]: Without dead ends: 122 [2021-10-21 19:48:43,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 575.6ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:48:43,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-21 19:48:43,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 118. [2021-10-21 19:48:43,163 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) [2021-10-21 19:48:43,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 133 transitions. [2021-10-21 19:48:43,164 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 133 transitions. Word has length 51 [2021-10-21 19:48:43,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:48:43,164 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 133 transitions. [2021-10-21 19:48:43,165 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) [2021-10-21 19:48:43,165 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 133 transitions. [2021-10-21 19:48:43,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-21 19:48:43,166 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:48:43,166 INFO L512 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] [2021-10-21 19:48:43,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-21 19:48:43,166 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)] === [2021-10-21 19:48:43,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:48:43,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1386528094, now seen corresponding path program 1 times [2021-10-21 19:48:43,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:48:43,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214017565] [2021-10-21 19:48:43,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:48:43,168 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:48:43,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:43,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:48:43,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:43,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:48:43,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:43,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:48:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:43,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:48:43,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:48:43,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:48:43,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214017565] [2021-10-21 19:48:43,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214017565] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:48:43,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996742094] [2021-10-21 19:48:43,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:48:43,627 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:48:43,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:48:43,631 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:48:43,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:48:43,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:43,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 80 conjunts are in the unsatisfiable core [2021-10-21 19:48:43,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:48:43,966 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 [2021-10-21 19:48:44,181 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:48:44,182 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 [2021-10-21 19:48:44,260 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 [2021-10-21 19:48:44,366 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:48:44,366 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 [2021-10-21 19:48:45,035 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 [2021-10-21 19:48:45,329 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-10-21 19:48:45,329 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 [2021-10-21 19:48:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:48:45,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996742094] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:48:45,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:48:45,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 40 [2021-10-21 19:48:45,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775067157] [2021-10-21 19:48:45,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-21 19:48:45,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:48:45,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-21 19:48:45,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1542, Unknown=0, NotChecked=0, Total=1640 [2021-10-21 19:48:45,344 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) [2021-10-21 19:48:47,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:48:47,444 INFO L93 Difference]: Finished difference Result 131 states and 147 transitions. [2021-10-21 19:48:47,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-21 19:48:47,444 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 [2021-10-21 19:48:47,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:48:47,445 INFO L225 Difference]: With dead ends: 131 [2021-10-21 19:48:47,446 INFO L226 Difference]: Without dead ends: 131 [2021-10-21 19:48:47,447 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1994.5ms TimeCoverageRelationStatistics Valid=282, Invalid=3140, Unknown=0, NotChecked=0, Total=3422 [2021-10-21 19:48:47,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-21 19:48:47,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 120. [2021-10-21 19:48:47,451 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) [2021-10-21 19:48:47,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 136 transitions. [2021-10-21 19:48:47,452 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 136 transitions. Word has length 51 [2021-10-21 19:48:47,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:48:47,453 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 136 transitions. [2021-10-21 19:48:47,453 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) [2021-10-21 19:48:47,453 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 136 transitions. [2021-10-21 19:48:47,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-21 19:48:47,454 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:48:47,454 INFO L512 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] [2021-10-21 19:48:47,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-21 19:48:47,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:48:47,675 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)] === [2021-10-21 19:48:47,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:48:47,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1386528093, now seen corresponding path program 1 times [2021-10-21 19:48:47,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:48:47,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720745039] [2021-10-21 19:48:47,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:48:47,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:48:47,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:48,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:48:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:48,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:48:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:48,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:48:48,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:48,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:48:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:48,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:48:48,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:48:48,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720745039] [2021-10-21 19:48:48,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720745039] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:48:48,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112087376] [2021-10-21 19:48:48,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:48:48,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:48:48,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:48:48,729 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:48:48,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:48:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:49,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 100 conjunts are in the unsatisfiable core [2021-10-21 19:48:49,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:48:49,117 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 [2021-10-21 19:48:49,121 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 [2021-10-21 19:48:49,607 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:48:49,607 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 [2021-10-21 19:48:49,615 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 [2021-10-21 19:48:49,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-10-21 19:48:49,809 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 [2021-10-21 19:48:50,054 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-21 19:48:50,055 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 [2021-10-21 19:48:50,067 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:48:50,068 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 [2021-10-21 19:48:51,393 INFO L354 Elim1Store]: treesize reduction 61, result has 11.6 percent of original size [2021-10-21 19:48:51,393 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 [2021-10-21 19:48:51,415 INFO L354 Elim1Store]: treesize reduction 54, result has 5.3 percent of original size [2021-10-21 19:48:51,415 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 [2021-10-21 19:48:51,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:48:51,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112087376] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:48:51,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:48:51,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 48 [2021-10-21 19:48:51,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797001372] [2021-10-21 19:48:51,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-21 19:48:51,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:48:51,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-21 19:48:51,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2214, Unknown=0, NotChecked=0, Total=2352 [2021-10-21 19:48:51,574 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) [2021-10-21 19:48:54,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:48:54,355 INFO L93 Difference]: Finished difference Result 146 states and 163 transitions. [2021-10-21 19:48:54,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-21 19:48:54,364 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 [2021-10-21 19:48:54,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:48:54,365 INFO L225 Difference]: With dead ends: 146 [2021-10-21 19:48:54,365 INFO L226 Difference]: Without dead ends: 146 [2021-10-21 19:48:54,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 3572.0ms TimeCoverageRelationStatistics Valid=364, Invalid=4058, Unknown=0, NotChecked=0, Total=4422 [2021-10-21 19:48:54,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-21 19:48:54,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 131. [2021-10-21 19:48:54,371 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) [2021-10-21 19:48:54,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 151 transitions. [2021-10-21 19:48:54,372 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 151 transitions. Word has length 51 [2021-10-21 19:48:54,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:48:54,372 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 151 transitions. [2021-10-21 19:48:54,373 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) [2021-10-21 19:48:54,373 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 151 transitions. [2021-10-21 19:48:54,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-21 19:48:54,374 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:48:54,374 INFO L512 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] [2021-10-21 19:48:54,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:48:54,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-21 19:48:54,587 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-21 19:48:54,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:48:54,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1807125059, now seen corresponding path program 1 times [2021-10-21 19:48:54,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:48:54,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490635267] [2021-10-21 19:48:54,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:48:54,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:48:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:54,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:48:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:54,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:48:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:54,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:48:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:54,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:48:54,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:54,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:48:54,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-21 19:48:54,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:48:54,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490635267] [2021-10-21 19:48:54,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490635267] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:48:54,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:48:54,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 19:48:54,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583711917] [2021-10-21 19:48:54,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:48:54,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:48:54,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:48:54,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:48:54,698 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) [2021-10-21 19:48:54,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:48:54,989 INFO L93 Difference]: Finished difference Result 129 states and 148 transitions. [2021-10-21 19:48:54,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:48:54,991 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 [2021-10-21 19:48:54,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:48:54,992 INFO L225 Difference]: With dead ends: 129 [2021-10-21 19:48:54,992 INFO L226 Difference]: Without dead ends: 129 [2021-10-21 19:48:54,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 146.7ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:48:54,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-10-21 19:48:55,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-10-21 19:48:55,007 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) [2021-10-21 19:48:55,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 148 transitions. [2021-10-21 19:48:55,008 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 148 transitions. Word has length 53 [2021-10-21 19:48:55,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:48:55,010 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 148 transitions. [2021-10-21 19:48:55,010 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) [2021-10-21 19:48:55,010 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 148 transitions. [2021-10-21 19:48:55,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-21 19:48:55,011 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:48:55,011 INFO L512 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] [2021-10-21 19:48:55,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-21 19:48:55,012 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr2ASSERT_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-21 19:48:55,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:48:55,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1480393345, now seen corresponding path program 1 times [2021-10-21 19:48:55,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:48:55,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834201864] [2021-10-21 19:48:55,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:48:55,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:48:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:55,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:48:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:55,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:48:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:55,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:48:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:55,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:48:55,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:55,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:48:55,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:55,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-21 19:48:55,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:48:55,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834201864] [2021-10-21 19:48:55,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834201864] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:48:55,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586740037] [2021-10-21 19:48:55,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:48:55,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:48:55,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:48:55,155 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:48:55,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:48:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:55,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:48:55,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:48:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-21 19:48:55,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586740037] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:48:55,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:48:55,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-10-21 19:48:55,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700023607] [2021-10-21 19:48:55,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:48:55,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:48:55,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:48:55,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:48:55,811 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) [2021-10-21 19:48:56,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:48:56,008 INFO L93 Difference]: Finished difference Result 133 states and 152 transitions. [2021-10-21 19:48:56,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:48:56,009 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 [2021-10-21 19:48:56,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:48:56,010 INFO L225 Difference]: With dead ends: 133 [2021-10-21 19:48:56,010 INFO L226 Difference]: Without dead ends: 133 [2021-10-21 19:48:56,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:48:56,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-21 19:48:56,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-10-21 19:48:56,014 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) [2021-10-21 19:48:56,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2021-10-21 19:48:56,016 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 55 [2021-10-21 19:48:56,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:48:56,016 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2021-10-21 19:48:56,017 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) [2021-10-21 19:48:56,017 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2021-10-21 19:48:56,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-21 19:48:56,018 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:48:56,018 INFO L512 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] [2021-10-21 19:48:56,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:48:56,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-21 19:48:56,219 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)] === [2021-10-21 19:48:56,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:48:56,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1357843693, now seen corresponding path program 1 times [2021-10-21 19:48:56,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:48:56,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831670567] [2021-10-21 19:48:56,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:48:56,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:48:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:56,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:48:56,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:56,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:48:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:56,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:48:56,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:56,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:48:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:56,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:48:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:48:56,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:48:56,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831670567] [2021-10-21 19:48:56,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831670567] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:48:56,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475372133] [2021-10-21 19:48:56,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:48:56,975 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:48:56,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:48:56,976 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:48:56,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:48:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:48:57,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 79 conjunts are in the unsatisfiable core [2021-10-21 19:48:57,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:48:57,456 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 [2021-10-21 19:48:57,725 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:48:57,725 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 [2021-10-21 19:48:57,828 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 [2021-10-21 19:48:58,010 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:48:58,011 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 [2021-10-21 19:48:58,761 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 [2021-10-21 19:48:58,852 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-10-21 19:48:58,853 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 [2021-10-21 19:48:58,867 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:48:58,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475372133] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:48:58,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:48:58,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 49 [2021-10-21 19:48:58,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334140558] [2021-10-21 19:48:58,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-21 19:48:58,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:48:58,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-21 19:48:58,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2208, Unknown=0, NotChecked=0, Total=2352 [2021-10-21 19:48:58,871 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) [2021-10-21 19:49:00,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:49:00,642 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2021-10-21 19:49:00,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-21 19:49:00,643 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 [2021-10-21 19:49:00,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:49:00,643 INFO L225 Difference]: With dead ends: 117 [2021-10-21 19:49:00,644 INFO L226 Difference]: Without dead ends: 110 [2021-10-21 19:49:00,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 2148.5ms TimeCoverageRelationStatistics Valid=345, Invalid=4211, Unknown=0, NotChecked=0, Total=4556 [2021-10-21 19:49:00,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-21 19:49:00,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-10-21 19:49:00,649 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) [2021-10-21 19:49:00,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2021-10-21 19:49:00,650 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 56 [2021-10-21 19:49:00,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:49:00,651 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2021-10-21 19:49:00,651 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) [2021-10-21 19:49:00,651 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2021-10-21 19:49:00,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-21 19:49:00,652 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:49:00,652 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:49:00,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:49:00,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-21 19:49:00,867 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)] === [2021-10-21 19:49:00,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:49:00,867 INFO L82 PathProgramCache]: Analyzing trace with hash 761567980, now seen corresponding path program 1 times [2021-10-21 19:49:00,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:49:00,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500118373] [2021-10-21 19:49:00,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:49:00,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:49:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:01,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:49:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:01,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:49:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:01,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:49:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:01,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:49:01,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:01,520 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:49:01,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:49:01,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500118373] [2021-10-21 19:49:01,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500118373] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:49:01,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245134621] [2021-10-21 19:49:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:49:01,521 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:49:01,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:49:01,522 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:49:01,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:49:01,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:01,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 81 conjunts are in the unsatisfiable core [2021-10-21 19:49:01,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:49:01,999 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 [2021-10-21 19:49:02,180 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 [2021-10-21 19:49:02,303 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:49:02,303 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 [2021-10-21 19:49:02,398 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 [2021-10-21 19:49:02,529 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:49:02,530 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 [2021-10-21 19:49:03,640 INFO L354 Elim1Store]: treesize reduction 52, result has 13.3 percent of original size [2021-10-21 19:49:03,640 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 [2021-10-21 19:49:03,825 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:49:03,826 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 [2021-10-21 19:49:03,893 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 [2021-10-21 19:49:03,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:49:03,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245134621] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:49:03,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:49:03,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25] total 50 [2021-10-21 19:49:03,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487918322] [2021-10-21 19:49:03,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-21 19:49:03,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:49:03,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-21 19:49:03,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2415, Unknown=0, NotChecked=0, Total=2550 [2021-10-21 19:49:03,899 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) [2021-10-21 19:49:06,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:49:06,519 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2021-10-21 19:49:06,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-21 19:49:06,520 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 [2021-10-21 19:49:06,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:49:06,521 INFO L225 Difference]: With dead ends: 124 [2021-10-21 19:49:06,521 INFO L226 Difference]: Without dead ends: 124 [2021-10-21 19:49:06,523 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 2924.0ms TimeCoverageRelationStatistics Valid=352, Invalid=5198, Unknown=0, NotChecked=0, Total=5550 [2021-10-21 19:49:06,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-21 19:49:06,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2021-10-21 19:49:06,527 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) [2021-10-21 19:49:06,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 119 transitions. [2021-10-21 19:49:06,528 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 119 transitions. Word has length 56 [2021-10-21 19:49:06,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:49:06,529 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 119 transitions. [2021-10-21 19:49:06,530 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) [2021-10-21 19:49:06,530 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 119 transitions. [2021-10-21 19:49:06,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-21 19:49:06,531 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:49:06,531 INFO L512 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] [2021-10-21 19:49:06,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:49:06,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-21 19:49:06,747 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)] === [2021-10-21 19:49:06,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:49:06,747 INFO L82 PathProgramCache]: Analyzing trace with hash 761620595, now seen corresponding path program 2 times [2021-10-21 19:49:06,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:49:06,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834532300] [2021-10-21 19:49:06,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:49:06,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:49:06,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:07,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:49:07,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:07,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:49:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:07,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:49:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:07,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:49:07,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:49:07,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:49:07,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834532300] [2021-10-21 19:49:07,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834532300] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:49:07,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154643381] [2021-10-21 19:49:07,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:49:07,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:49:07,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:49:07,647 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:49:07,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:49:08,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:49:08,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:49:08,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 102 conjunts are in the unsatisfiable core [2021-10-21 19:49:08,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:49:08,262 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 [2021-10-21 19:49:08,632 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-21 19:49:08,633 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 [2021-10-21 19:49:08,790 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 [2021-10-21 19:49:08,804 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 [2021-10-21 19:49:08,988 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-21 19:49:08,989 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 [2021-10-21 19:49:08,998 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:49:08,998 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 [2021-10-21 19:49:10,119 INFO L354 Elim1Store]: treesize reduction 94, result has 3.1 percent of original size [2021-10-21 19:49:10,120 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 [2021-10-21 19:49:10,385 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-10-21 19:49:10,385 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 [2021-10-21 19:49:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:49:10,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154643381] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:49:10,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:49:10,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 25] total 51 [2021-10-21 19:49:10,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795020128] [2021-10-21 19:49:10,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-21 19:49:10,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:49:10,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-21 19:49:10,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2021-10-21 19:49:10,537 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) [2021-10-21 19:49:14,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:49:14,115 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2021-10-21 19:49:14,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-21 19:49:14,116 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 [2021-10-21 19:49:14,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:49:14,117 INFO L225 Difference]: With dead ends: 130 [2021-10-21 19:49:14,117 INFO L226 Difference]: Without dead ends: 130 [2021-10-21 19:49:14,119 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 3885.5ms TimeCoverageRelationStatistics Valid=434, Invalid=4678, Unknown=0, NotChecked=0, Total=5112 [2021-10-21 19:49:14,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-21 19:49:14,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 112. [2021-10-21 19:49:14,122 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) [2021-10-21 19:49:14,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2021-10-21 19:49:14,123 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 56 [2021-10-21 19:49:14,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:49:14,123 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2021-10-21 19:49:14,124 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) [2021-10-21 19:49:14,124 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2021-10-21 19:49:14,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-21 19:49:14,124 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:49:14,124 INFO L512 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] [2021-10-21 19:49:14,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:49:14,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-21 19:49:14,347 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)] === [2021-10-21 19:49:14,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:49:14,347 INFO L82 PathProgramCache]: Analyzing trace with hash 761620596, now seen corresponding path program 2 times [2021-10-21 19:49:14,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:49:14,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078089133] [2021-10-21 19:49:14,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:49:14,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:49:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:14,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:49:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:14,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:49:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:15,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:49:15,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:15,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:49:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:15,425 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:49:15,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:49:15,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078089133] [2021-10-21 19:49:15,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078089133] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:49:15,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688682111] [2021-10-21 19:49:15,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:49:15,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:49:15,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:49:15,426 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:49:15,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 19:49:15,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:49:15,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:49:15,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 103 conjunts are in the unsatisfiable core [2021-10-21 19:49:15,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:49:16,046 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 [2021-10-21 19:49:16,302 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:49:16,302 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 [2021-10-21 19:49:16,433 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 [2021-10-21 19:49:16,441 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 [2021-10-21 19:49:16,605 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-21 19:49:16,606 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 [2021-10-21 19:49:16,615 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:49:16,615 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 [2021-10-21 19:49:17,737 INFO L354 Elim1Store]: treesize reduction 110, result has 9.1 percent of original size [2021-10-21 19:49:17,737 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 [2021-10-21 19:49:17,760 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-10-21 19:49:17,760 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 [2021-10-21 19:49:17,816 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:49:17,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688682111] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:49:17,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:49:17,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26] total 49 [2021-10-21 19:49:17,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165435189] [2021-10-21 19:49:17,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-21 19:49:17,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:49:17,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-21 19:49:17,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2214, Unknown=0, NotChecked=0, Total=2352 [2021-10-21 19:49:17,819 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) [2021-10-21 19:49:20,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:49:20,220 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2021-10-21 19:49:20,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-21 19:49:20,221 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 [2021-10-21 19:49:20,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:49:20,222 INFO L225 Difference]: With dead ends: 109 [2021-10-21 19:49:20,222 INFO L226 Difference]: Without dead ends: 109 [2021-10-21 19:49:20,224 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 3087.2ms TimeCoverageRelationStatistics Valid=356, Invalid=4066, Unknown=0, NotChecked=0, Total=4422 [2021-10-21 19:49:20,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-21 19:49:20,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2021-10-21 19:49:20,227 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) [2021-10-21 19:49:20,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2021-10-21 19:49:20,228 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 56 [2021-10-21 19:49:20,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:49:20,229 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2021-10-21 19:49:20,229 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) [2021-10-21 19:49:20,229 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2021-10-21 19:49:20,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-21 19:49:20,230 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:49:20,230 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:49:20,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:49:20,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-21 19:49:20,447 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)] === [2021-10-21 19:49:20,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:49:20,447 INFO L82 PathProgramCache]: Analyzing trace with hash 2133771082, now seen corresponding path program 1 times [2021-10-21 19:49:20,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:49:20,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784388594] [2021-10-21 19:49:20,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:49:20,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:49:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:20,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:49:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:20,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:49:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:20,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:49:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:21,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:49:21,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:49:21,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:49:21,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784388594] [2021-10-21 19:49:21,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784388594] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:49:21,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577316583] [2021-10-21 19:49:21,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:49:21,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:49:21,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:49:21,187 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:49:21,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:49:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:21,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 81 conjunts are in the unsatisfiable core [2021-10-21 19:49:21,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:49:21,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:49:22,139 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 [2021-10-21 19:49:22,279 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:49:22,279 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 [2021-10-21 19:49:22,393 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 [2021-10-21 19:49:22,562 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:49:22,563 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 [2021-10-21 19:49:23,283 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 [2021-10-21 19:49:23,915 INFO L354 Elim1Store]: treesize reduction 156, result has 15.7 percent of original size [2021-10-21 19:49:23,916 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 [2021-10-21 19:49:24,022 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:49:24,022 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 [2021-10-21 19:49:24,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:49:24,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577316583] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:49:24,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:49:24,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25] total 51 [2021-10-21 19:49:24,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922645314] [2021-10-21 19:49:24,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-21 19:49:24,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:49:24,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-21 19:49:24,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2516, Unknown=0, NotChecked=0, Total=2652 [2021-10-21 19:49:24,049 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) [2021-10-21 19:49:27,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:49:27,874 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2021-10-21 19:49:27,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-21 19:49:27,874 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 [2021-10-21 19:49:27,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:49:27,875 INFO L225 Difference]: With dead ends: 109 [2021-10-21 19:49:27,875 INFO L226 Difference]: Without dead ends: 109 [2021-10-21 19:49:27,877 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 3569.0ms TimeCoverageRelationStatistics Valid=359, Invalid=5191, Unknown=0, NotChecked=0, Total=5550 [2021-10-21 19:49:27,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-21 19:49:27,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2021-10-21 19:49:27,881 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) [2021-10-21 19:49:27,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 113 transitions. [2021-10-21 19:49:27,882 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 113 transitions. Word has length 57 [2021-10-21 19:49:27,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:49:27,882 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 113 transitions. [2021-10-21 19:49:27,883 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) [2021-10-21 19:49:27,883 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 113 transitions. [2021-10-21 19:49:27,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-21 19:49:27,884 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:49:27,884 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:49:27,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:49:28,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:49:28,107 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)] === [2021-10-21 19:49:28,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:49:28,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1722394286, now seen corresponding path program 1 times [2021-10-21 19:49:28,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:49:28,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972203437] [2021-10-21 19:49:28,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:49:28,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:49:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:28,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:49:28,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:28,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:49:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:28,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:49:28,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:28,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:49:28,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:28,767 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:49:28,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:49:28,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972203437] [2021-10-21 19:49:28,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972203437] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:49:28,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324340783] [2021-10-21 19:49:28,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:49:28,768 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:49:28,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:49:28,769 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:49:28,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 19:49:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:29,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 83 conjunts are in the unsatisfiable core [2021-10-21 19:49:29,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:49:29,524 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 [2021-10-21 19:49:29,700 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 [2021-10-21 19:49:29,802 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:49:29,802 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 [2021-10-21 19:49:29,899 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 [2021-10-21 19:49:30,025 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:49:30,025 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 [2021-10-21 19:49:31,094 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 [2021-10-21 19:49:31,707 INFO L354 Elim1Store]: treesize reduction 215, result has 13.0 percent of original size [2021-10-21 19:49:31,707 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 [2021-10-21 19:49:31,793 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:49:31,793 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 [2021-10-21 19:49:31,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:49:31,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324340783] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:49:31,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:49:31,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27] total 53 [2021-10-21 19:49:31,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037990898] [2021-10-21 19:49:31,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-10-21 19:49:31,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:49:31,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-10-21 19:49:31,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2723, Unknown=0, NotChecked=0, Total=2862 [2021-10-21 19:49:31,804 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) [2021-10-21 19:49:35,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:49:35,162 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2021-10-21 19:49:35,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-21 19:49:35,163 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 [2021-10-21 19:49:35,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:49:35,164 INFO L225 Difference]: With dead ends: 107 [2021-10-21 19:49:35,164 INFO L226 Difference]: Without dead ends: 107 [2021-10-21 19:49:35,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 3747.6ms TimeCoverageRelationStatistics Valid=362, Invalid=5490, Unknown=0, NotChecked=0, Total=5852 [2021-10-21 19:49:35,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-21 19:49:35,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-10-21 19:49:35,168 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) [2021-10-21 19:49:35,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2021-10-21 19:49:35,169 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 58 [2021-10-21 19:49:35,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:49:35,170 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2021-10-21 19:49:35,170 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) [2021-10-21 19:49:35,170 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2021-10-21 19:49:35,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-21 19:49:35,171 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:49:35,171 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:49:35,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:49:35,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:49:35,395 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)] === [2021-10-21 19:49:35,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:49:35,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1854615501, now seen corresponding path program 1 times [2021-10-21 19:49:35,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:49:35,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071787538] [2021-10-21 19:49:35,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:49:35,395 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:49:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:35,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:49:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:35,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:49:35,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:35,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:49:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:35,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:49:35,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:49:35,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:49:35,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071787538] [2021-10-21 19:49:35,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071787538] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:49:35,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:49:35,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 19:49:35,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483829523] [2021-10-21 19:49:35,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:49:35,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:49:35,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:49:35,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:49:35,555 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) [2021-10-21 19:49:35,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:49:35,914 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2021-10-21 19:49:35,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:49:35,915 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 [2021-10-21 19:49:35,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:49:35,915 INFO L225 Difference]: With dead ends: 106 [2021-10-21 19:49:35,916 INFO L226 Difference]: Without dead ends: 106 [2021-10-21 19:49:35,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 232.1ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:49:35,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-21 19:49:35,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-10-21 19:49:35,918 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) [2021-10-21 19:49:35,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2021-10-21 19:49:35,919 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 59 [2021-10-21 19:49:35,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:49:35,919 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2021-10-21 19:49:35,920 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) [2021-10-21 19:49:35,920 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2021-10-21 19:49:35,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-21 19:49:35,920 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:49:35,921 INFO L512 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] [2021-10-21 19:49:35,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-21 19:49:35,921 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)] === [2021-10-21 19:49:35,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:49:35,921 INFO L82 PathProgramCache]: Analyzing trace with hash -170152215, now seen corresponding path program 1 times [2021-10-21 19:49:35,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:49:35,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731784407] [2021-10-21 19:49:35,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:49:35,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:49:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:36,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:49:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:36,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:49:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:36,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:49:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:36,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:49:36,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:36,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:49:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:49:37,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:49:37,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731784407] [2021-10-21 19:49:37,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731784407] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:49:37,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491644016] [2021-10-21 19:49:37,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:49:37,499 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:49:37,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:49:37,500 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:49:37,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 19:49:38,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:49:38,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 108 conjunts are in the unsatisfiable core [2021-10-21 19:49:38,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:49:38,335 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 [2021-10-21 19:49:38,640 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:49:38,641 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 [2021-10-21 19:49:38,762 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 [2021-10-21 19:49:38,875 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-21 19:49:38,876 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 [2021-10-21 19:49:40,012 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-21 19:49:40,012 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 [2021-10-21 19:49:40,961 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 [2021-10-21 19:49:41,403 INFO L354 Elim1Store]: treesize reduction 31, result has 48.3 percent of original size [2021-10-21 19:49:41,404 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 [2021-10-21 19:49:42,193 INFO L354 Elim1Store]: treesize reduction 203, result has 17.8 percent of original size [2021-10-21 19:49:42,193 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 [2021-10-21 19:49:53,441 INFO L354 Elim1Store]: treesize reduction 85, result has 19.0 percent of original size [2021-10-21 19:49:53,442 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 [2021-10-21 19:49:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:49:53,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491644016] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:49:53,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:49:53,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 36] total 72 [2021-10-21 19:49:53,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159012356] [2021-10-21 19:49:53,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-10-21 19:49:53,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:49:53,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-10-21 19:49:53,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=5019, Unknown=3, NotChecked=0, Total=5256 [2021-10-21 19:49:53,618 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) [2021-10-21 19:50:13,599 WARN L207 SmtUtils]: Spent 8.28 s on a formula simplification. DAG size of input: 99 DAG size of output: 86 [2021-10-21 19:50:54,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:50:54,578 INFO L93 Difference]: Finished difference Result 172 states and 181 transitions. [2021-10-21 19:50:54,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-10-21 19:50:54,579 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 [2021-10-21 19:50:54,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:50:54,580 INFO L225 Difference]: With dead ends: 172 [2021-10-21 19:50:54,581 INFO L226 Difference]: Without dead ends: 172 [2021-10-21 19:50:54,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3073 ImplicationChecksByTransitivity, 30012.3ms TimeCoverageRelationStatistics Valid=1013, Invalid=13730, Unknown=19, NotChecked=0, Total=14762 [2021-10-21 19:50:54,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-10-21 19:50:54,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 120. [2021-10-21 19:50:54,587 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) [2021-10-21 19:50:54,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 133 transitions. [2021-10-21 19:50:54,588 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 133 transitions. Word has length 67 [2021-10-21 19:50:54,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:50:54,589 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 133 transitions. [2021-10-21 19:50:54,589 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) [2021-10-21 19:50:54,589 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 133 transitions. [2021-10-21 19:50:54,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-21 19:50:54,590 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:50:54,590 INFO L512 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] [2021-10-21 19:50:54,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:50:54,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:50:54,808 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)] === [2021-10-21 19:50:54,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:50:54,809 INFO L82 PathProgramCache]: Analyzing trace with hash -170152214, now seen corresponding path program 1 times [2021-10-21 19:50:54,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:50:54,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621290713] [2021-10-21 19:50:54,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:50:54,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:50:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:50:55,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:50:55,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:50:55,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:50:55,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:50:55,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:50:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:50:55,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:50:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:50:55,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:50:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:50:56,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:50:56,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:50:56,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621290713] [2021-10-21 19:50:56,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621290713] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:50:56,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001772201] [2021-10-21 19:50:56,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:50:56,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:50:56,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:50:56,510 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:50:56,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 19:50:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:50:57,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-21 19:50:57,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:50:57,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:50:57,998 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 [2021-10-21 19:50:58,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:50:58,007 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 [2021-10-21 19:50:58,314 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 [2021-10-21 19:50:58,321 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 [2021-10-21 19:50:58,638 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 [2021-10-21 19:50:58,642 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 [2021-10-21 19:50:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-21 19:50:58,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001772201] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:50:58,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:50:58,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 16] total 49 [2021-10-21 19:50:58,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342378347] [2021-10-21 19:50:58,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-10-21 19:50:58,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:50:58,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-10-21 19:50:58,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2311, Unknown=0, NotChecked=0, Total=2450 [2021-10-21 19:50:58,701 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) [2021-10-21 19:51:06,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:51:06,593 INFO L93 Difference]: Finished difference Result 233 states and 248 transitions. [2021-10-21 19:51:06,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-10-21 19:51:06,598 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 [2021-10-21 19:51:06,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:51:06,599 INFO L225 Difference]: With dead ends: 233 [2021-10-21 19:51:06,599 INFO L226 Difference]: Without dead ends: 233 [2021-10-21 19:51:06,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 7551.1ms TimeCoverageRelationStatistics Valid=1083, Invalid=10259, Unknown=0, NotChecked=0, Total=11342 [2021-10-21 19:51:06,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-10-21 19:51:06,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2021-10-21 19:51:06,606 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) [2021-10-21 19:51:06,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 188 transitions. [2021-10-21 19:51:06,607 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 188 transitions. Word has length 67 [2021-10-21 19:51:06,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:51:06,608 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 188 transitions. [2021-10-21 19:51:06,608 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) [2021-10-21 19:51:06,608 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 188 transitions. [2021-10-21 19:51:06,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-10-21 19:51:06,609 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:51:06,609 INFO L512 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] [2021-10-21 19:51:06,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:51:06,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-21 19:51:06,815 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)] === [2021-10-21 19:51:06,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:51:06,815 INFO L82 PathProgramCache]: Analyzing trace with hash -140782016, now seen corresponding path program 1 times [2021-10-21 19:51:06,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:51:06,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112942763] [2021-10-21 19:51:06,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:51:06,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:51:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:51:06,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:51:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:51:06,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:51:06,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:51:07,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:51:07,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:51:07,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:51:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:51:07,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:51:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:51:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-21 19:51:07,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:51:07,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112942763] [2021-10-21 19:51:07,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112942763] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:51:07,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190735789] [2021-10-21 19:51:07,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:51:07,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:51:07,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:51:07,515 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:51:07,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 19:51:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:51:08,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 104 conjunts are in the unsatisfiable core [2021-10-21 19:51:08,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:51:08,772 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 [2021-10-21 19:51:08,781 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 [2021-10-21 19:51:08,915 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:51:08,915 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 [2021-10-21 19:51:08,926 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-21 19:51:08,926 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 [2021-10-21 19:51:10,231 INFO L354 Elim1Store]: treesize reduction 56, result has 27.3 percent of original size [2021-10-21 19:51:10,231 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 [2021-10-21 19:51:10,335 INFO L354 Elim1Store]: treesize reduction 237, result has 11.2 percent of original size [2021-10-21 19:51:10,336 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 [2021-10-21 19:51:10,587 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 [2021-10-21 19:51:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:51:10,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190735789] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:51:10,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:51:10,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 31] total 48 [2021-10-21 19:51:10,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698671018] [2021-10-21 19:51:10,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-21 19:51:10,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:51:10,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-21 19:51:10,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2201, Unknown=0, NotChecked=0, Total=2352 [2021-10-21 19:51:10,593 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) [2021-10-21 19:51:14,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:51:14,552 INFO L93 Difference]: Finished difference Result 221 states and 245 transitions. [2021-10-21 19:51:14,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-21 19:51:14,552 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 [2021-10-21 19:51:14,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:51:14,554 INFO L225 Difference]: With dead ends: 221 [2021-10-21 19:51:14,554 INFO L226 Difference]: Without dead ends: 221 [2021-10-21 19:51:14,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 3601.9ms TimeCoverageRelationStatistics Valid=654, Invalid=7356, Unknown=0, NotChecked=0, Total=8010 [2021-10-21 19:51:14,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-10-21 19:51:14,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 184. [2021-10-21 19:51:14,560 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) [2021-10-21 19:51:14,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 215 transitions. [2021-10-21 19:51:14,562 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 215 transitions. Word has length 72 [2021-10-21 19:51:14,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:51:14,562 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 215 transitions. [2021-10-21 19:51:14,562 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) [2021-10-21 19:51:14,562 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 215 transitions. [2021-10-21 19:51:14,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-10-21 19:51:14,563 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:51:14,563 INFO L512 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] [2021-10-21 19:51:14,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 19:51:14,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-21 19:51:14,779 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)] === [2021-10-21 19:51:14,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:51:14,779 INFO L82 PathProgramCache]: Analyzing trace with hash -69275061, now seen corresponding path program 1 times [2021-10-21 19:51:14,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:51:14,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747057310] [2021-10-21 19:51:14,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:51:14,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:51:14,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:51:14,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:51:14,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:51:14,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:51:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:51:15,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:51:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:51:15,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:51:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:51:15,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:51:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:51:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:51:15,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:51:15,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747057310] [2021-10-21 19:51:15,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747057310] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:51:15,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771082942] [2021-10-21 19:51:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:51:15,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:51:15,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:51:15,579 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:51:15,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 19:51:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:51:16,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 93 conjunts are in the unsatisfiable core [2021-10-21 19:51:16,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:51:16,631 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 [2021-10-21 19:51:16,737 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 [2021-10-21 19:51:16,864 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:51:16,864 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 [2021-10-21 19:51:16,953 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 [2021-10-21 19:51:17,071 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:51:17,072 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 [2021-10-21 19:51:17,394 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-10-21 19:51:17,394 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 [2021-10-21 19:51:18,094 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 [2021-10-21 19:51:18,165 INFO L354 Elim1Store]: treesize reduction 69, result has 10.4 percent of original size [2021-10-21 19:51:18,165 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 [2021-10-21 19:51:18,168 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 [2021-10-21 19:51:18,347 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 [2021-10-21 19:51:18,352 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:51:18,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771082942] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:51:18,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:51:18,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32] total 54 [2021-10-21 19:51:18,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980296571] [2021-10-21 19:51:18,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-10-21 19:51:18,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:51:18,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-10-21 19:51:18,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2805, Unknown=0, NotChecked=0, Total=2970 [2021-10-21 19:51:18,354 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) [2021-10-21 19:51:21,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:51:21,180 INFO L93 Difference]: Finished difference Result 201 states and 233 transitions. [2021-10-21 19:51:21,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-21 19:51:21,181 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 [2021-10-21 19:51:21,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:51:21,183 INFO L225 Difference]: With dead ends: 201 [2021-10-21 19:51:21,183 INFO L226 Difference]: Without dead ends: 201 [2021-10-21 19:51:21,184 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 3137.9ms TimeCoverageRelationStatistics Valid=588, Invalid=6552, Unknown=0, NotChecked=0, Total=7140 [2021-10-21 19:51:21,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-10-21 19:51:21,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 187. [2021-10-21 19:51:21,188 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) [2021-10-21 19:51:21,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 218 transitions. [2021-10-21 19:51:21,190 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 218 transitions. Word has length 73 [2021-10-21 19:51:21,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:51:21,190 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 218 transitions. [2021-10-21 19:51:21,190 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) [2021-10-21 19:51:21,190 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 218 transitions. [2021-10-21 19:51:21,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-21 19:51:21,191 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:51:21,191 INFO L512 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] [2021-10-21 19:51:21,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-10-21 19:51:21,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-21 19:51:21,407 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)] === [2021-10-21 19:51:21,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:51:21,407 INFO L82 PathProgramCache]: Analyzing trace with hash 2146147630, now seen corresponding path program 1 times [2021-10-21 19:51:21,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:51:21,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560882198] [2021-10-21 19:51:21,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:51:21,408 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:51:21,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:51:21,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:51:21,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:51:21,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:51:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:51:21,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:51:21,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:51:21,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:51:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:51:21,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:51:21,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:51:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-21 19:51:22,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:51:22,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560882198] [2021-10-21 19:51:22,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560882198] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:51:22,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633989656] [2021-10-21 19:51:22,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:51:22,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:51:22,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:51:22,233 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:51:22,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 19:51:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:51:23,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 86 conjunts are in the unsatisfiable core [2021-10-21 19:51:23,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:51:23,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:51:23,751 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 [2021-10-21 19:51:24,132 INFO L354 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2021-10-21 19:51:24,133 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 [2021-10-21 19:51:24,418 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 [2021-10-21 19:51:24,538 INFO L354 Elim1Store]: treesize reduction 60, result has 39.4 percent of original size [2021-10-21 19:51:24,539 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 [2021-10-21 19:51:24,541 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 [2021-10-21 19:51:28,565 INFO L354 Elim1Store]: treesize reduction 111, result has 25.5 percent of original size [2021-10-21 19:51:28,565 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 [2021-10-21 19:51:28,577 INFO L354 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2021-10-21 19:51:28,578 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 [2021-10-21 19:51:28,761 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:51:28,761 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 [2021-10-21 19:51:30,846 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-21 19:51:30,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633989656] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:51:30,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:51:30,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 44 [2021-10-21 19:51:30,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584847327] [2021-10-21 19:51:30,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-21 19:51:30,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:51:30,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-21 19:51:30,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1830, Unknown=1, NotChecked=0, Total=1980 [2021-10-21 19:51:30,848 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) [2021-10-21 19:52:02,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:02,258 INFO L93 Difference]: Finished difference Result 305 states and 344 transitions. [2021-10-21 19:52:02,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-10-21 19:52:02,259 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 [2021-10-21 19:52:02,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:02,260 INFO L225 Difference]: With dead ends: 305 [2021-10-21 19:52:02,260 INFO L226 Difference]: Without dead ends: 305 [2021-10-21 19:52:02,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2455 ImplicationChecksByTransitivity, 14529.4ms TimeCoverageRelationStatistics Valid=1140, Invalid=8358, Unknown=8, NotChecked=0, Total=9506 [2021-10-21 19:52:02,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-10-21 19:52:02,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 251. [2021-10-21 19:52:02,267 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) [2021-10-21 19:52:02,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 305 transitions. [2021-10-21 19:52:02,269 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 305 transitions. Word has length 75 [2021-10-21 19:52:02,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:02,270 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 305 transitions. [2021-10-21 19:52:02,270 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) [2021-10-21 19:52:02,270 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 305 transitions. [2021-10-21 19:52:02,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-21 19:52:02,271 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:02,271 INFO L512 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] [2021-10-21 19:52:02,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:02,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-21 19:52:02,495 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)] === [2021-10-21 19:52:02,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:02,495 INFO L82 PathProgramCache]: Analyzing trace with hash -776937946, now seen corresponding path program 1 times [2021-10-21 19:52:02,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:02,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242771685] [2021-10-21 19:52:02,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:02,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:02,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:52:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:02,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:52:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:03,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:52:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:03,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:52:03,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:03,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:52:03,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:03,912 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:52:03,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:03,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242771685] [2021-10-21 19:52:03,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242771685] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:03,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582588987] [2021-10-21 19:52:03,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:03,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:03,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:03,914 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:03,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 19:52:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:05,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 75 conjunts are in the unsatisfiable core [2021-10-21 19:52:05,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:05,994 INFO L354 Elim1Store]: treesize reduction 68, result has 28.4 percent of original size [2021-10-21 19:52:05,995 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 [2021-10-21 19:52:06,028 INFO L354 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2021-10-21 19:52:06,028 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 [2021-10-21 19:52:06,311 INFO L354 Elim1Store]: treesize reduction 76, result has 38.2 percent of original size [2021-10-21 19:52:06,311 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 [2021-10-21 19:52:06,359 INFO L354 Elim1Store]: treesize reduction 76, result has 38.2 percent of original size [2021-10-21 19:52:06,359 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 [2021-10-21 19:52:07,339 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-21 19:52:07,339 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 [2021-10-21 19:52:07,343 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:52:07,343 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 [2021-10-21 19:52:07,355 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-21 19:52:07,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582588987] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:07,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:52:07,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 20] total 56 [2021-10-21 19:52:07,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278614742] [2021-10-21 19:52:07,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-10-21 19:52:07,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:07,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-10-21 19:52:07,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2910, Unknown=0, NotChecked=0, Total=3080 [2021-10-21 19:52:07,357 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) [2021-10-21 19:52:11,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:11,683 INFO L93 Difference]: Finished difference Result 223 states and 245 transitions. [2021-10-21 19:52:11,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-21 19:52:11,684 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 [2021-10-21 19:52:11,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:11,685 INFO L225 Difference]: With dead ends: 223 [2021-10-21 19:52:11,685 INFO L226 Difference]: Without dead ends: 213 [2021-10-21 19:52:11,685 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 4308.9ms TimeCoverageRelationStatistics Valid=641, Invalid=7191, Unknown=0, NotChecked=0, Total=7832 [2021-10-21 19:52:11,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-10-21 19:52:11,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 200. [2021-10-21 19:52:11,690 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) [2021-10-21 19:52:11,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 229 transitions. [2021-10-21 19:52:11,691 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 229 transitions. Word has length 78 [2021-10-21 19:52:11,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:11,692 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 229 transitions. [2021-10-21 19:52:11,692 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) [2021-10-21 19:52:11,692 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 229 transitions. [2021-10-21 19:52:11,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-21 19:52:11,693 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:11,693 INFO L512 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] [2021-10-21 19:52:11,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-10-21 19:52:11,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-21 19:52:11,909 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr2ASSERT_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-21 19:52:11,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:11,910 INFO L82 PathProgramCache]: Analyzing trace with hash 688463746, now seen corresponding path program 1 times [2021-10-21 19:52:11,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:11,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494375120] [2021-10-21 19:52:11,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:11,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:12,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:52:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:12,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:52:12,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:12,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:52:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:12,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:52:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:12,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:52:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:12,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-10-21 19:52:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:12,122 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-21 19:52:12,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:12,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494375120] [2021-10-21 19:52:12,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494375120] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:52:12,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:52:12,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 19:52:12,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009916289] [2021-10-21 19:52:12,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:52:12,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:12,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:52:12,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:52:12,126 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) [2021-10-21 19:52:12,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:12,558 INFO L93 Difference]: Finished difference Result 209 states and 231 transitions. [2021-10-21 19:52:12,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:52:12,558 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 [2021-10-21 19:52:12,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:12,560 INFO L225 Difference]: With dead ends: 209 [2021-10-21 19:52:12,561 INFO L226 Difference]: Without dead ends: 209 [2021-10-21 19:52:12,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 213.6ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:52:12,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-10-21 19:52:12,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 202. [2021-10-21 19:52:12,568 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) [2021-10-21 19:52:12,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 231 transitions. [2021-10-21 19:52:12,569 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 231 transitions. Word has length 82 [2021-10-21 19:52:12,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:12,572 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 231 transitions. [2021-10-21 19:52:12,572 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) [2021-10-21 19:52:12,573 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 231 transitions. [2021-10-21 19:52:12,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-21 19:52:12,574 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:12,575 INFO L512 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] [2021-10-21 19:52:12,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-10-21 19:52:12,575 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr3ENSURES_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-10-21 19:52:12,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:12,576 INFO L82 PathProgramCache]: Analyzing trace with hash 688463811, now seen corresponding path program 1 times [2021-10-21 19:52:12,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:12,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130705980] [2021-10-21 19:52:12,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:12,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:12,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:12,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:52:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:12,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:52:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:13,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:52:13,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:13,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:52:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:13,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:52:13,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:14,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-10-21 19:52:14,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:14,888 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:52:14,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:14,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130705980] [2021-10-21 19:52:14,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130705980] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:14,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981636894] [2021-10-21 19:52:14,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:14,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:14,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:14,890 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:14,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-21 19:52:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:16,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 118 conjunts are in the unsatisfiable core [2021-10-21 19:52:16,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:16,794 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 [2021-10-21 19:52:17,096 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:52:17,097 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 [2021-10-21 19:52:38,042 INFO L354 Elim1Store]: treesize reduction 192, result has 13.5 percent of original size [2021-10-21 19:52:38,043 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 [2021-10-21 19:52:38,048 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 [2021-10-21 19:52:42,918 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-21 19:52:42,919 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 [2021-10-21 19:52:43,392 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 15 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:52:43,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981636894] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:43,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:52:43,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 38] total 68 [2021-10-21 19:52:43,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515898700] [2021-10-21 19:52:43,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-10-21 19:52:43,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:43,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-10-21 19:52:43,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=4418, Unknown=18, NotChecked=0, Total=4692 [2021-10-21 19:52:43,394 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) [2021-10-21 19:53:39,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:39,172 INFO L93 Difference]: Finished difference Result 214 states and 242 transitions. [2021-10-21 19:53:39,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-21 19:53:39,173 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 [2021-10-21 19:53:39,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:39,174 INFO L225 Difference]: With dead ends: 214 [2021-10-21 19:53:39,174 INFO L226 Difference]: Without dead ends: 211 [2021-10-21 19:53:39,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2187 ImplicationChecksByTransitivity, 48008.0ms TimeCoverageRelationStatistics Valid=537, Invalid=7985, Unknown=34, NotChecked=0, Total=8556 [2021-10-21 19:53:39,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-10-21 19:53:39,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 204. [2021-10-21 19:53:39,179 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) [2021-10-21 19:53:39,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 233 transitions. [2021-10-21 19:53:39,181 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 233 transitions. Word has length 82 [2021-10-21 19:53:39,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:39,182 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 233 transitions. [2021-10-21 19:53:39,182 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) [2021-10-21 19:53:39,182 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 233 transitions. [2021-10-21 19:53:39,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-10-21 19:53:39,183 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:39,183 INFO L512 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] [2021-10-21 19:53:39,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:39,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:39,407 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)] === [2021-10-21 19:53:39,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:39,407 INFO L82 PathProgramCache]: Analyzing trace with hash -127063222, now seen corresponding path program 1 times [2021-10-21 19:53:39,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:39,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247395237] [2021-10-21 19:53:39,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:39,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:39,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:39,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:53:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:39,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:53:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:39,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-21 19:53:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:39,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-21 19:53:39,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:39,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-21 19:53:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:39,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-10-21 19:53:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-21 19:53:39,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:39,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247395237] [2021-10-21 19:53:39,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247395237] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:39,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306681731] [2021-10-21 19:53:39,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:39,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:39,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:39,592 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:39,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-21 19:53:41,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:41,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:53:41,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:41,255 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-21 19:53:41,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306681731] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:53:41,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:53:41,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2021-10-21 19:53:41,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585353911] [2021-10-21 19:53:41,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:53:41,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:41,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:53:41,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:53:41,256 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) [2021-10-21 19:53:41,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:41,272 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-10-21 19:53:41,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:53:41,272 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 [2021-10-21 19:53:41,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:41,273 INFO L225 Difference]: With dead ends: 72 [2021-10-21 19:53:41,273 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 19:53:41,273 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:53:41,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 19:53:41,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 19:53:41,273 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) [2021-10-21 19:53:41,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 19:53:41,274 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 83 [2021-10-21 19:53:41,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:41,274 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 19:53:41,274 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) [2021-10-21 19:53:41,274 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 19:53:41,274 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 19:53:41,276 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr0REQUIRES_VIOLATION [2021-10-21 19:53:41,277 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr1REQUIRES_VIOLATION [2021-10-21 19:53:41,277 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr2REQUIRES_VIOLATION [2021-10-21 19:53:41,278 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr3REQUIRES_VIOLATION [2021-10-21 19:53:41,278 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-21 19:53:41,278 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-21 19:53:41,278 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2ASSERT_VIOLATIONMEMORY_LEAK [2021-10-21 19:53:41,278 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:53:41,279 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr0REQUIRES_VIOLATION [2021-10-21 19:53:41,279 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr1REQUIRES_VIOLATION [2021-10-21 19:53:41,279 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr2REQUIRES_VIOLATION [2021-10-21 19:53:41,279 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr3REQUIRES_VIOLATION [2021-10-21 19:53:41,279 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr0REQUIRES_VIOLATION [2021-10-21 19:53:41,279 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr1REQUIRES_VIOLATION [2021-10-21 19:53:41,279 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr2REQUIRES_VIOLATION [2021-10-21 19:53:41,279 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr3REQUIRES_VIOLATION [2021-10-21 19:53:41,279 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr4REQUIRES_VIOLATION [2021-10-21 19:53:41,280 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr5REQUIRES_VIOLATION [2021-10-21 19:53:41,280 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr6REQUIRES_VIOLATION [2021-10-21 19:53:41,280 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr7REQUIRES_VIOLATION [2021-10-21 19:53:41,280 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:53:41,280 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:53:41,280 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:53:41,280 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr11REQUIRES_VIOLATION [2021-10-21 19:53:41,280 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr12REQUIRES_VIOLATION [2021-10-21 19:53:41,280 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr13REQUIRES_VIOLATION [2021-10-21 19:53:41,281 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr14REQUIRES_VIOLATION [2021-10-21 19:53:41,281 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr15REQUIRES_VIOLATION [2021-10-21 19:53:41,281 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr16REQUIRES_VIOLATION [2021-10-21 19:53:41,281 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr17REQUIRES_VIOLATION [2021-10-21 19:53:41,281 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr18REQUIRES_VIOLATION [2021-10-21 19:53:41,281 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr19REQUIRES_VIOLATION [2021-10-21 19:53:41,281 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr20REQUIRES_VIOLATION [2021-10-21 19:53:41,281 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr21REQUIRES_VIOLATION [2021-10-21 19:53:41,281 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr22REQUIRES_VIOLATION [2021-10-21 19:53:41,281 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr23REQUIRES_VIOLATION [2021-10-21 19:53:41,281 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr24REQUIRES_VIOLATION [2021-10-21 19:53:41,282 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:53:41,282 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr26ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:53:41,282 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr27ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:53:41,282 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr28REQUIRES_VIOLATION [2021-10-21 19:53:41,282 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_remove_firstErr29REQUIRES_VIOLATION [2021-10-21 19:53:41,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:41,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-21 19:53:41,488 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:53:41,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:53:41 BoogieIcfgContainer [2021-10-21 19:53:41,491 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:53:41,491 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:53:41,492 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:53:41,492 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:53:41,493 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:46:55" (3/4) ... [2021-10-21 19:53:41,496 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 19:53:41,504 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-10-21 19:53:41,504 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-21 19:53:41,504 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2021-10-21 19:53:41,505 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_circular_remove_first [2021-10-21 19:53:41,505 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-21 19:53:41,505 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-21 19:53:41,505 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_circular_create [2021-10-21 19:53:41,506 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-21 19:53:41,506 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure node_create [2021-10-21 19:53:41,514 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-10-21 19:53:41,515 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-21 19:53:41,515 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-21 19:53:41,516 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:53:41,588 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:53:41,588 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:53:41,589 INFO L168 Benchmark]: Toolchain (without parser) took 407508.09 ms. Allocated memory was 98.6 MB in the beginning and 362.8 MB in the end (delta: 264.2 MB). Free memory was 66.4 MB in the beginning and 223.7 MB in the end (delta: -157.3 MB). Peak memory consumption was 105.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:53:41,589 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 98.6 MB. Free memory is still 51.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:53:41,591 INFO L168 Benchmark]: CACSL2BoogieTranslator took 600.48 ms. Allocated memory was 98.6 MB in the beginning and 134.2 MB in the end (delta: 35.7 MB). Free memory was 66.1 MB in the beginning and 102.2 MB in the end (delta: -36.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:53:41,591 INFO L168 Benchmark]: Boogie Preprocessor took 139.12 ms. Allocated memory is still 134.2 MB. Free memory was 102.2 MB in the beginning and 99.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:53:41,592 INFO L168 Benchmark]: RCFGBuilder took 893.90 ms. Allocated memory is still 134.2 MB. Free memory was 99.3 MB in the beginning and 74.2 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:53:41,593 INFO L168 Benchmark]: TraceAbstraction took 405766.23 ms. Allocated memory was 134.2 MB in the beginning and 362.8 MB in the end (delta: 228.6 MB). Free memory was 74.2 MB in the beginning and 227.9 MB in the end (delta: -153.7 MB). Peak memory consumption was 76.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:53:41,593 INFO L168 Benchmark]: Witness Printer took 96.57 ms. Allocated memory is still 362.8 MB. Free memory was 227.9 MB in the beginning and 223.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:53:41,602 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 98.6 MB. Free memory is still 51.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 600.48 ms. Allocated memory was 98.6 MB in the beginning and 134.2 MB in the end (delta: 35.7 MB). Free memory was 66.1 MB in the beginning and 102.2 MB in the end (delta: -36.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 139.12 ms. Allocated memory is still 134.2 MB. Free memory was 102.2 MB in the beginning and 99.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 893.90 ms. Allocated memory is still 134.2 MB. Free memory was 99.3 MB in the beginning and 74.2 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 405766.23 ms. Allocated memory was 134.2 MB in the beginning and 362.8 MB in the end (delta: 228.6 MB). Free memory was 74.2 MB in the beginning and 227.9 MB in the end (delta: -153.7 MB). Peak memory consumption was 76.4 MB. Max. memory is 16.1 GB. * Witness Printer took 96.57 ms. Allocated memory is still 362.8 MB. Free memory was 227.9 MB in the beginning and 223.7 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 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: 405683.4ms, OverallIterations: 40, TraceHistogramMax: 3, EmptinessCheckTime: 55.9ms, AutomataDifference: 287841.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1950 SDtfs, 9683 SDslu, 13137 SDs, 0 SdLazy, 51862 SolverSat, 1637 SolverUnsat, 209 SolverUnknown, 0 SolverNotchecked, 191503.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2805 GetRequests, 1173 SyntacticMatches, 32 SemanticMatches, 1600 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21429 ImplicationChecksByTransitivity, 146491.7ms Time, 0.0ms 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, 0.0ms DumpTime, AutomataMinimizationStatistics: 348.0ms AutomataMinimizationTime, 40 MinimizatonAttempts, 634 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 454.2ms SsaConstructionTime, 1638.9ms SatisfiabilityAnalysisTime, 97016.6ms 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! [2021-10-21 19:53:41,838 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-21 19:53:41,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8afcedd6-b2c8-449a-9f86-c5d2df81d85a/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...